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Orthopaedic Proceedings
Vol. 103-B, Issue SUPP_15 | Pages 10 - 10
1 Dec 2021
Buijs M van den Kieboom J Sliepen J Wever K Hietbrink F Leenen L IJpma F Govaert G
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Aim. Early fracture-related infections (FRIs) are a common entity in hospitals treating trauma patients. It is important to be aware of the consequences of FRI in order to be able to counsel patients about the expected course of their disease. Therefore, the aims of this study were to evaluate the recurrence rate, to establish the number of secondary surgical procedures needed to gain control of the initial infection, and to identify predictors for recurrence in patients with early FRI. Method. A retrospective multicentre cohort study was conducted in two level 1 trauma centres. All patients between January 1st 2015 to July 1st 2020 with confirmed FRI with an onset of <6 weeks after initial fracture fixation were included. Recorded data included patient demographics, trauma mechanism, clinical and laboratory findings, surgical procedure, microbiology, and follow-up. Univariate and multivariate logistic regression analyses were performed to assess predictors for recurrent FRI. Results. A total of 166 patients were included in this study with a median age of 54.0 years (IQR 33.0–64.0). The cohort consisted of a majority of males (66.3%). Recurrence of FRI at one year follow-up was 11.4% and the overall recurrence rate within a median follow-up time of 24.0 months (IQR 15.4–36.9) was 18.1%. A total of 49.4% of patients needed at least one secondary procedure in order to treat the ongoing FRI, of whom 12.6% required at least three additional procedures. Predictors for recurrent FRI were use of an intramedullary nail during index operation (OR 4.343 (95% CI 1.448–13.028), p=0.009), need for at least one additional washout and debridement (OR 1.908 (95% CI 1.102–3.305), p=0.021), and a decrease in Injury Severity Score (ISS) (inverted OR 1.058 (95% CI 1.002–1.118), p=0.042). Conclusions. An FRI recurrence rate of 18.1% and need for at least one additional surgical procedure to gain control of the initial infection of 49.4% were seen in our cohort. Predictors for recurrent FRI were respectively the use of an intramedullary nail during index operation, need for secondary procedures, and a decrease in ISS. Results of this study can be used for preoperative counselling of early FRI patients


Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_13 | Pages 2 - 2
1 Dec 2022
Khan R Halai M Pinsker E Mann M Daniels T
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Preoperative talar valgus deformity increases the technical difficulty of total ankle replacement (TAR) and is associated with an increased failure rate. Deformity of ≥15° has been reported to be a contraindication to arthroplasty. The goal of the present study was to determine whether the operative procedures and clinical outcomes of TAR for treatment of end-stage ankle arthritis were comparable for patients with preoperative talar valgus deformity of ≥15° as compared to those with <15°. We will describe the evolving surgical technique being utilized to tackle these challenging cases. Fifty ankles with preoperative coronal-plane tibiotalar valgus deformity of ≥15° “valgus” group) and 50 ankles with valgus deformity of <15° (“control” group) underwent TAR. The cohorts were similar with respect to demographics and components used. All TARs were performed by a single surgeon. The mean duration of clinical follow-up was 5.5 years (minimum two years). Preoperative and postoperative radiographic measurements of coronal-plane deformity, Ankle Osteoarthritis Scale (AOS) scores and Short Form (SF)-36 scores were prospectively recorded. All ancillary (intraoperative) and secondary procedures, complications and measurements were collected. The AOS pain and disability subscale scores decreased significantly in both groups. The improvement in AOS and SF-36 scores did not differ significantly between the groups at the time of the final follow-up. The valgus group underwent more ancillary procedures during the index surgery (80% vs 26%). Tibio-talar deformity improved significantly toward a normal weight-bearing axis in the valgus group. Secondary postoperative procedures were more common in the valgus group (36%) than the controls (20%). Overall, re-operation was not associated with poorer patient outcome scores. Metal component revision surgery occurred in seven patients (three valgus and four controls). These revisions included two deep infections (2%), one in each group, which were converted to hindfoot fusions. Therefore, 94% of the valgus group retained their original components at final follow-up. Thus far, this is the largest reported study that specifically evaluates TAR with significant preoperative valgus alignment, in addition to having the longest follow-up. Satisfactory midterm results were achieved in patients with valgus mal-alignment of ≥15°. The valgus cohort required more procedures during and after their TAR, as well as receiving more novel techniques to balance their TAR. Whilst longer term studies are needed, valgus coronal-plane alignment of ≥15° should not be considered an absolute contraindication to TAR if the associated deformities are addressed


Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_2 | Pages 33 - 33
10 Feb 2023
Jadav B
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Sternoclavicular joint infections are uncommon but severe and complex condition usually in medically complex and compromised hosts. These infections are challenging to treat with risks of infection extending into the mediastinal structures and surgical drainage is often faced with problems of multiple unplanned returns to theatre, chronic non-healing wounds that turn into sinus and the risk of significant clinical escalation and death. Percutaneous aspirations or small incision drainage often provide inadequate drainage and failed control of infection, while open drainage and washout require multidisciplinary support, due to the close proximity of the mediastinal structures and the great vessels as well as failure to heal the wounds and creation of chronic wound or sinus. We present our series of 8 cases over 6 years where we used the plan of open debridement of the Sternoclavicular joint with medial end of clavicle excision to allow adequate drainage. The surgical incision was not closed primarily, and a suction vacuum dressing was applied until the infection was contained on clinical and laboratory parameters. After the infection was deemed contained, the surgical incision was closed by local muscle flap by transferring the medial upper sternal head of the Pectoralis Major muscle to fill in the sternoclavicular joint defect. This technique provided a consistent and reliable way to overcome the infection and have the wound definitively closed that required no secondary procedures after the flap surgery and no recurrence of infections so far. We suggest that open and adequate drainage of Sternoclavicular joint staged with vacuum dressing followed by pectoralis major local flap is a reliable technique for achieving control of infection and wound closure for these challenging infections


Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_17 | Pages 13 - 13
24 Nov 2023
Sliepen J Hoekstra H Onsea J Bessems L Depypere M Herteleer M Sermon A Nijs S Vranckx J Metsemakers W
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Aim. The number of operatively treated clavicle fractures has increased over the past decades. Consequently, this has led to an increase in secondary procedures required to treat complications such as fracture-related infection (FRI). The primary objective of this study was to assess the clinical and functional outcome of patients treated for FRI of the clavicle. The secondary objectives were to evaluate the healthcare costs and propose a standardized protocol for the surgical management of this complication. Method. All patients with a clavicle fracture who underwent open reduction and internal fixation (ORIF) between 1 January 2015 and 1 March 2022 were retrospectively evaluated. This study included patients with an FRI who were diagnosed and treated according to the recommendations of a multidisciplinary team at the University Hospitals Leuven, Belgium. Results. We evaluated 626 patients with 630 clavicle fractures who underwent ORIF. In total, 28 patients were diagnosed with an FRI. Of these, eight (29%) underwent definitive implant removal, five (18%) underwent debridement, antimicrobial treatment and implant retention, and fourteen patients (50%) had their implant exchanged in either a single-stage procedure, a two-stage procedure or after multiple revisions. One patient (3.6%) underwent resection of the clavicle. Twelve patients (43%) underwent autologous bone grafting (tricortical iliac crest bone graft (n=6), free vascularized fibular graft (n=5), cancellous bone graft (n=1)) to reconstruct the bone defect. The median follow-up was 32.3 (P. 25. -P. 75. : 23.9–51.1) months. Two patients (7.1%) experienced a recurrence of infection. The functional outcome was satisfactory, with 26 out of 28 patients (93%) having full range of motion. The median healthcare cost was € 11.506 (P. 25. -P. 75. : € 7.953–23.798) per patient. Conclusion. FRI is a serious complication that can occur after the surgical treatment of clavicle fractures. Overall, the outcome of patients treated for FRI of the clavicle is good, when management of this complication is performed by using a multidisciplinary team approach. The median healthcare costs of these patients are up to 3.5 times higher compared to non-infected operatively treated clavicle fractures. Expert opinion considers factors such as the size of the bone defect, the condition of the soft tissue, and patient demand to guide surgical decision making


Orthopaedic Proceedings
Vol. 103-B, Issue SUPP_3 | Pages 61 - 61
1 Mar 2021
Schemitsch E
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Displaced femoral neck fractures can have devastating impacts on quality of life and patient function. Evidence for optimal surgical approach is far from definitive. The Hip Fracture Evaluation with Alternatives of Total Hip Arthroplasty versus Hemi-Arthroplasty (HEALTH) trial aimed to evaluate unplanned secondary procedures following total hip arthroplasty (THA) versus hemi-arthroplasty (HA) within two years of initial surgery for displaced femoral neck fractures. Secondary objectives evaluated differences in patient function, health-related quality of life, mortality, and hip-related complications HEALTH is a large randomized controlled trial that included 1,495 patients across 81 centers in 10 countries. Patients aged 50 years or older with displaced femoral neck fractures received either THA or HA. Participants were followed for 24 months post-fracture and a Central Adjudication Committee adjudicated fracture eligibility, technical placement of prosthesis, additional surgical procedures, hip-related complications, and mortality. The primary analyses were a Cox proportional hazards model with time to the primary study endpoint as the outcome and THA versus HA as the independent variable. Using multi-level linear models with three levels (centre, patient, and time), with patient and centre entered as random effects, the effect of THA versus HA on quality of life (Short Form-12 (SF-12) and EQ-5D), function (Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC)), and mobility (Timed Up and Go Test (TUG)) were estimated separately. The majority of patients were female (70.1%), 70 years of age or older (80.2%), and able to ambulate without the aid of an assistive device before their fracture (74.4%), and the injury in the majority of the patients was a subcapital femoral neck fracture (61.9%). The primary end point occurred in 57 of 718 patients (7.9%) who were randomly assigned to THA and 60 of 723 patients (8.3%) who were randomly assigned to HA (hazard ratio, 0.95; 95% confidence interval [CI], 0.64 to 1.40; p=0.79). Hip instability or dislocation occurred in 34 patients (4.7%) assigned to total hip arthroplasty and 17 patients (2.4%) assigned to hemi- arthroplasty (hazard ratio, 2.00; 99% CI, 0.97 to 4.09). Function, as measured with the total WOMAC total score, pain score, stiffness score, and function score, modestly favored THA over HA. Mortality was similar in the two treatment groups (14.3% among the patients assigned to THA and 13.1% among those assigned to HA, p=0.48). Serious adverse events occurred in 300 patients (41.8%) assigned to THA and in 265 patients (36.7%) assigned to HA. Among independently ambulating patients with displaced femoral neck fractures, the incidence of secondary procedures did not differ significantly between patients who were randomly assigned to undergo THA and those who were assigned to undergo HA, and THA provided a clinically unimportant improvement over HA in function and quality of life over 24 months


Orthopaedic Proceedings
Vol. 103-B, Issue SUPP_3 | Pages 62 - 62
1 Mar 2021
Lee J Perera J Trottier ER Tsoi K Hopyan S
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Paediatric bone sarcomas around the knee are often amenable to either endoprosthetic reconstruction or rotationplasty. Cosmesis and durability dramatically distinguish these two options, although patient-reported functional satisfaction has been similar among survivors. However, the impact on oncological and surgical outcomes for these approaches has not been directly compared. We retrospectively reviewed all wide resections for bone sarcoma of the distal femur or proximal tibia that were reconstructed either with an endoprosthesis or by rotationplasty at our institution between June 2004 and December 2014 with a minimum two year follow-up. Pertinent demographic information, surgical and oncological outcomes were reviewed. Survival analysis was performed using the Kaplan-Meier method with statistical significance set at p<0.05. Thirty eight patients with primary sarcomas around the knee underwent wide resection and either endoprosthetic reconstruction (n=19) or rotationplasty (n=19). Groups were comparable in terms of demographic parameters and systemic tumour burden at presentation. We found that selection of endoprosthetic reconstruction versus rotationplasty did not impact overall survival for the entire patient cohort but was significant in subgroup analysis. Two-year overall survival was 86.7% and 85.6% in the endoprosthesis and rotationplasty groups, respectively (p=0.33). When only patients with greater than 90% chemotherapy-induced necrosis were considered, overall survival was significantly better in the rotationplasty versus endoprosthesis groups (100% vs. 72.9% at two years, p=0.013). Similarly, while event-free survival was not affected by reconstruction method (60.2% vs. 73.3% at two years for endoprosthesis vs rotationplasty, p=0.27), there was a trend towards lower local recurrence in rotationplasty patients (p=0.07). When surgical outcomes were considered, a higher complication rate was seen in patients that received an endoprosthesis compared to those who underwent rotationplasty. Including all reasons for re-operation, 78.9% (n=15) of the endoprosthesis patients required a minimum of one additional surgery compared with only 26.3% (n=5) among rotationplasty patients (p=0.003). The most common reasons for re-operation in endoprosthesis patients were wound breakdown/infection (n=6), limb length discrepancy (n=6) and periprosthetic fracture (n=2). Excluding limb length equalisation procedures, the average time to re-operation in this patient population was 5.6 months (range 1 week to 23 months). Similarly, the most common reason for a secondary procedure in rotationplasty patients was wound breakdown/infection, although only two patients experienced this complication. Average time to re-operation in this group was 23.8 months (range 5 to 49 months). Endoprosthetic reconstruction and rotationplasty are both viable limb-salvage options following wide resection of high-grade bony sarcomas located around the knee in the paediatric population. Endoprosthetic reconstruction is associated with a higher complication rate and may negatively impact local recurrence. Study of a larger number of patients is needed to determine whether the reconstructive choice affects survival


Orthopaedic Proceedings
Vol. 101-B, Issue SUPP_14 | Pages 74 - 74
1 Dec 2019
Pastor I Poilvache H Morcillo D van Cauter M Rodriguez-Villalobos H Yombi J Cornu O
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Aim. We wonder what the results of two stage procedures were in terms of morbidity (amputation, dead) and infection recurrence. We also seek to identify risk factors for failure and see if the results of a second two stage surgery were not even worse. Material and Methods. We retrospectively reviewed 140 prosthetic joint infection (PJI) treated with a two stage procedure. Patient data has been reviewed to determine which factors would be predictive for failure. Results. From the 140 two stages, 98 patients were infection free at two years. Four died in the following year. 38 patients presented a recurrence within the two years: 2 died and 1 was amputated within one year. Nine were further treated with a second two stage procedure and 26 with debridement and implant retention procedures and antibiotics (DAIR). Six of these last received long terms suppressive antibiotics. In total 27 from the 38 were again diseases free at two years follow up. The dead and amputation rates are 4,3% and 0,8 % respectively. The rate of success after the first two stage was 80% and after a second two stage procedure 78%. The final rate of PJI cured is 89,3%. The only difference observed between success and failure after a first two stage procedure was related to microbiology. Polymicrobial infection was 28.6% of the PJI which will fail and only 14,1% in those whose treatment will succeed (p<0.05). Looking to the patients that underwent a second two stage surgery, recurrence involved monomicrobial pattern with a microorganism that has developed a resistance to quinolones. Conclusion. Mortality and amputation in PJI management should be mentioned to patients as significant potential complications. Infection control within a two stage procedure is not as high as reported, unless the final result is considered after secondary procedures. A second two stage procedure was not related with a worse outcome. Our data confirms the poorer outcome of polymicrobial infection. Recurrence in those patients involves monomicrobial infections with resistant microorganisms. Nevertheless, a second two stage procedure appears acceptable when a DAIR procedure and suppressive antibiotherapy is difficult or impossible due to the microorganism resistance profile


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_14 | Pages 58 - 58
1 Mar 2013
Mostert P Colyn S Coetzee S Goller R
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Purpose of the study. This study aims to evaluate the use of closed reduction of hips with developmental dysplasia of the hip (DDH) and medial open reduction of these hips as a subsection of closed reduced hips. Methods. The study was a retrospective analysis of treatment of 30 children with developmental dysplasia of the hip (DDH). These children were taken from a consecutive series of children treated over a period from June 2000 to 2011 with closed reduction by a single surgeon. The ages at the time of diagnosis were between 1 day and 13 months (mean 5.25 weeks). Included in this series are 7 patients treated with medial open reduction, all done with the Ludloff approach. Follow up of these patients was from 8 months to 12 years (mean 5 years). All patients needing secondary procedures were noted. The X- rays were evaluated for percentage acetabulum cover in patients over the age of 8 and improvement of the acetabular index in all these patients. Results. 4 children needed secondary procedures. 1 child of the closed reduction group developed avascular necrosis of the femoral head that was treated with a Salter osteotomy and a further 2 needed secondary open reductions after redislocation following initial closed reduction. One child with bilateral open medial reductions had a Salter osteotomy 6 years after the initial treatment was done. 26 of the children had good outcomes with improvement of the acetabular angles, percentage acetabular cover and pain free independent ambulation. The average acetabular index improved from 37.5° to 23.3°. Conclusion. Closed reduction of DDH hips is a good treatment modality. Early treatment allows for acetabular and femoral development. There are minimal secondary procedures necessary after closed reduction, and open medial reduction does not increase the complication rate. NO DISCLOSURES


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVIII | Pages 54 - 54
1 Sep 2012
Trajkovski T Cadden A Pinsker E Daniels TR
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Purpose. Coronal plane malalignment at the level of the tibiotalar joint is not uncommon in advanced ankle joint arthritis. It has been stated that preoperative varus or valgus deformity beyond 15 degrees is a relative contraindication and deformity beyond 20 degrees is an absolute contraindication to ankle joint replacement. There is limited evidence in the current literature to support these figures. The current study is a prospective clinical and radiographic comparative study between patients who underwent total ankle arthroplasty with coronal plane varus tibiotalar deformities greater than 10 degrees and patients with neutral alignment, less than 10 degrees of deformity. Method. Thirty-six ankles with greater than 10 degrees of varus alignment were compared to thirty-six ankles which were matched for implant type, age, gender, and year of surgery. Patients completed preoperative and yearly postoperative functional outcome scores including the American Orthopaedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot scores, the Ankle Osteoarthritis Scale (AOS) and the Short Form-36 Standard Version 2.0 Health Survey. Weightbearing preoperative and postoperative radiographs were obtained and reviewed by four examiners (AC, AQ, TD, TT) and measurements were taken of the degree of coronal plane deformity. Results. After a mean follow-up of 27 months (9–54), the varus ankles improved significantly on the AOFAS (P<0.0001), AOS-Pain Score (P<0.0001), AOS-Disability Score (P<0.0001), and SF-36 Physical Component Score (P<0.0001). There was no improvement in SF-36-Mental Component Score. (P=0.722). There was no statistically significant differences between the two groups when comparing AOFAS (P=0.155), AOS-Pain Score (P=0.854), AOSDisability Score (P=0.593), SF-36-Physical Component Score (P=0.433), SF-36 Mental Component Score (P=0.633). Sixteen of Thirty-Six ankles in the varus group needed a secondary procedure (implant failure, infection, malalignment) which was approaching significance in comparison to eight ankles in the neutral group. (P = 0.079). Secondary procedures in the varus group included: tendon transfers, calcaneal / metatarsal / malleolar ostoetomies and ligament reconstructions. Radiographically, the pre-operative coronal plane varus tibiotalar deformity averaged 19.4 6.4 and postoperatively 1.44 2.6 (P< 0.0001). There was no statistical difference in post operative tibiotalar alignment between the varus and neutral groups (P<0.05). Conclusion. The clinical outcome of TAR performed in ankles with pre-operative varus alignment >10 degrees is comparable with that of neutrally aligned ankles. The increased number of secondary procedures in the varus group was attributed to the complexity of the deformity and the steep learning curve. Outcomes as measured radiographically and through validate scores were similar to patients without deformity suggesting that varus coronal plane deformity of the talus is not a contraindication to total ankle replacement


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_34 | Pages 66 - 66
1 Dec 2013
Gladnick B Nam D Khamaisy S Paul S Pearle A
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Introduction:. Two fixed bearing options exist for tibial resurfacing when performing unicompartmental knee arthroplasty (UKA). Inlay components are polyethylene-only implants inserted into a carved pocket on the tibial surface, relying upon the subchondral bone to support the implant. Onlay components have a metal base plate and are placed on top of a flat tibial cut, supported by a rim of cortical bone. To our knowledge, there is no published report that compares the clinical outcomes of these two implants using a robotically controlled surgical technique. We performed a retrospective review of a single surgeon's experience with Inlay versus Onlay components, using a robotic-guided protocol. Methods:. All surgeries were performed using the same planning software and robotic guidance for execution of the surgical plan (Mako Surgical, Fort Lauderdale, FL). The senior surgeon's prospective database was reviewed to identify patients with 1) medial-sided UKA and 2) at least two years of clinical follow up. Eighty-six patients met these inclusion/exclusion criteria: 41 Inlays and 45 Onlays. Five patients underwent a secondary or revision procedure during the follow up period and were considered separately. Our primary outcome was the WOMAC score, subcategorized by the Pain, Stiffness, and Function sub-scores. The secondary outcome was need for secondary surgery. Continuous variables were analyzed using the two-tailed Student's t-test; categorical variables were analyzed using Fisher's exact test. Results:. Average follow up was 2.7 years and 2.3 years in the Inlay and Onlay groups, respectively. The post-op WOMAC Pain score was 3.1 for Inlays and 1.6 for Onlays (p = 0.03). The post-op Stiffness score was 1.8 for Inlays and 1.4 for Onlays (p = 0.19). The post-op Function score was 10.3 for Inlays and 6.7 for Onlays (p = 0.12). We identified a subgroup of 51 patients (23 Inlay, 28 Onlay) for whom there was both pre- and post-op WOMAC data available. There were no differences in the pre-op Pain, Stiffness, or Function scores between groups. In this subgroup, the Pain score improved from 8.3 to 4.0 for Inlays, versus an improvement from 9.2 to 1.7 for Onlays (p = 0.01). The Stiffness score improved from 3.9 to 2.2 for Inlays, versus an improvement from 4.3 to 1.5 for Onlays (p = 0.08). The Function score improved from 27.5 to 12.5 for Inlays, versus an improvement from 32.1 to 7.3 for Onlays (p = 0.03). When all 86 patients in the study were considered, 4/41 Inlays (9.8%) underwent a secondary procedure during the two year follow up (two conversions to total knee replacement [TKR]; one conversion to an Onlay component; one internal fixation of a subchondral compression fracture). In the Onlay group, 1/45 patients (2.2%) underwent a secondary procedure, a conversion to TKR (p = 0.20). Discussion:. Onlay UKR demonstrated improved pain relief compared to inlay UKR at two years of follow up. There was a trend toward improved function and fewer secondary surgical procedures with the onlay device. We advise surgeons performing UKA to preferentially use Onlay implants in order to maximize clinical benefit


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_6 | Pages 67 - 67
1 Mar 2017
Vasarhelyi E Weeks C Graves S Kelly L Marsh J
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Background. The management of the patella during primary total knee arthroplasty (TKA) is controversial. Despite the majority of patients reporting excellent outcomes following TKA, a common complaint is anterior knee pain. Resurfacing of the patella at the time of initial surgery has been proposed as a means of preventing anterior knee pain, however current evidence, including four recent meta-analyses, has failed to show clear superiority of patellar resurfacing. Therefore, the purpose of this study was to estimate the cost-effectiveness of patellar resurfacing compared to non-resurfacing in TKA. Methods. We conducted a cost-effectiveness analysis using a decision analytic model to represent a hypothetical patient cohort undergoing primary TKA. Each patient will receive a TKA either with the Patella Resurfaced or Not Resurfaced. Following surgery, patients can transition to one of three chronic health states: 1) Well Post-operative, 2) Patellofemoral Pain (PFP), or 3) Serious Adverse Event (AE), which we have defined as any event requiring Revision TKA, including: loosening/lysis, infection, instability, or fracture (Figure 1). We obtained revision rates following TKA for both resurfaced and unresurfaced cohorts using data from the 2014 Australian Registry. This data was chosen due to similarities between Australian and North American practice patterns and patient demographics, as well as the availability of longer term follow up data, up to 14 years postoperative. Our effectiveness outcome for the model was the quality-adjusted life year (QALY). We used utility scores obtained from the literature to calculate QALYs for each health state. Direct procedure costs were obtained from our institution's case costing department, and the billing fees for each procedure. We estimated cost-effectiveness from a Canadian publicly funded health care system perspective. All costs and quality of life outcomes were discounted at a rate of 5%. All costs are presented in 2015 Canadian dollars. Results. Our cost-effectiveness analysis suggests that TKA with patella resurfacing is a dominant procedure. Patients who receive primary TKA with non-resurfaced patella had higher associated costs over the first 14 years postoperative ($16,182 vs $15,720), and slightly lower quality of life (5.37 QALYs vs 6.01 QALYs). The revision rate for patellar resurfacing was 1.3%. If the rate of secondary resurfacing procedures is 0.5% or less, there is no difference in costs between the two procedures. Discussion. Our results suggest that, up to 14 years postoperative, resurfacing the patella in primary TKA is cost-effective compared to primary TKA without patellar resurfacing, due to the higher revision rate in this cohort of patients for secondary resurfacing. Our sensitivity analysis suggests that, among surgical practices that do not routinely perform secondary resurfacing procedures (estimated rate at our institution is 0.3%) there is no significant difference in costs. Although our results suggest that patella resurfacing results in higher quality of life, our model is limited by the availability and validity of utility outcome estimates reported in the literature for the long term follow up of patients following TKA with or without patella resurfacing and secondary resurfacing procedures


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_4 | Pages 84 - 84
1 Feb 2017
Kosse N Kerkhoff Y Metsaars W Louwerens J
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Background. Total ankle arthroplasty is an accepted alternative to arthrodesis of the ankle. However, complication and failure rates remain high compared to knee and hip arthroplasty. Long-term results of the Scandinavian Total Ankle Replacement (STAR) are limited, with variable complication and failure rates observed. This prospective study presents the long-term survivorship and the postoperative complications of the STAR prosthesis. Additionally, clinical outcomes and radiographic appearance were evaluated. Methods. Between May 1999 and June 2008, 134 primary total ankle arthroplasties were performed using the STAR prosthesis in 124 patients. The survivorship, postoperative complications and reoperations were recorded, with a minimum follow-up period of 7.5 years. Clinical results were assessed using the Foot Function Index (FFI) and the Kofoed score. The presence of component migration, cysts and radiolucency surrounding the prosthesis components, heterotopic ossifications and progression of osteoarthritis in adjacent joints were determined. Results. The cumulative survival was 78% after a 10-year follow-up period (Figure 1). An ankle arthrodesis was performed in the 20 ankles that failed. Fourteen polyethylene insert fractures occurred. Other complications occurred in 29 ankles, requiring secondary procedures in 21 ankles. Nevertheless, the postoperative clinical results improved significantly. Osteolytic cysts were observed in 59 ankles and the surface area of these cysts increased during follow-up, without any association with the prosthesis alignment or clinical outcome. Heterotopic ossifications at the medial malleolus were present in 58 cases and at the posterior tibia in 73 cases, with no effect on clinical outcome. Osteoarthritis of the subtalar joint and talonavicular joint developed in 9 and 11 cases, respectively. Conclusion. The long-term clinical outcomes for the STAR were found to be satisfactory. These results are consistent with previous studies; however, the survival and complication rates are still disappointing compared to the results obtained in knee and hip arthroplasty. Higher rates of successful outcomes following ankle arthroplasty are required, and these results highlight the need for further research to clarify the origin and significance of the reported complications. Figure 1. Kaplan-Meier survivorship analysis with revision or removal of the tibia and/or the talus component for any reason as the endpoint, showing 78% (95% confidence interval 0.63–0.88) survival at 10.28 years follow-up. For figure, please contact authors directly


Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_8 | Pages 37 - 37
1 May 2014
Cameron H
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Hip fusion used to be a common procedure in children and young adults, but it is now exceedingly rare. My results of hip fusion takedown more than 20 years ago were quite acceptable. Of 20 cases, 88% achieved more than 90 degrees of flexion and 75% stopped limping by the end of one year. The elderly would revert to limping when tired. As no simple hips are currently fused, the results of hip fusion takedown in the last 20 years are very much inferior. Of 28 cases, limp is absent in 20%, mild in 12% and severe in 68%. Range of motion is acceptable with 80% eventually achieving more than 90 degrees of flexion. There are complications, but these are quite manageable. The aseptic loosening rate is small and the longevity is high. Current implants, therefore, can easily handle the hip fusion takedown. As the incidence of limp is prohibitively high, additional techniques to reinforce the hip abductors either concurrently or more likely as a secondary procedure as suggested by Whiteside should be learned by all those proposing to carry out hip fusion takedown


Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_12 | Pages 102 - 102
1 Jul 2014
Whiteside L
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Loss of the abductor portions of the gluteus medius and gluteus minimus muscles due to total hip arthroplasty (THA) causes severe limp and often instability. To minimise the risk of limp and instability the anterior half of the gluteus maximus was transferred to the greater trochanter and sutured under the vastus lateralis. A separate posterior flap was transferred under the primary flap to substitute for the gluteus minimus and capsule. To ensure tight repair, the flaps were attached and tensioned in abduction. The technique was performed in 11 patients (11 hips) with complete loss of abductor attachment; the procedure was performed in 9 patients during THA and in 2 later as a secondary procedure. Pre-operatively, all patients had abductor lurch, positive Trendelenburg sign, and no abduction of the hip against gravity. The follow up ranged from 16 to 42 months. Post-operatively, 9 patients had strong abduction of the hip against gravity, no abductor lurch, and negative Trendelenburg sign. One patient had weak abduction against gravity, negative Trendelenburg sign, and slight abductor lurch. One patient failed to achieve strong abduction, had severe limp after 6 months of protection and physical therapy, and was lost to follow up. Gluteus maximus transfer can restore abductor function in THA, but it is technically demanding and requires careful, prolonged rehabilitation


Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_3 | Pages 16 - 16
1 Jan 2016
Cavanagh P Fournier M Manner P
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Introduction. Measured outcomes from knee joint arthroplasty (TKA) have primarily focused on surgeon-directed criteria, such as alignment, range of motion measured in the clinic, and implant durability, rather than on functional outcomes. There is strong evidence that subjective reporting by patients fails to capture objective real-life function. 1,2. We believe that the recent emphasis on clinical outcomes desired by the patient, as well as the need to demonstrate value, requires a new approach to patient outcomes that directly monitors ambulatory activity after surgery. We have developed and tested a system that: 1) autonomously identifies patients who are not progressing well in their recovery from TKA surgery; 2) characterizes patient activity profiles; 3) automatically alerts health care providers of patients who should be seen for additional follow-up. We anticipate that such a system could decrease secondary procedures such as manipulation under anesthesia (MUA) and reduce hospital re-admission rates thereby resulting in significant cost savings to the patient, the care providers, and insurers. Methods. The components of the system include: 1) A sensor package that is mounted correctly in relation to the knee joint (Figure 1a) and is suitable for long term use; 2) An application that runs under the Android operating system to communicate with the sensor and to gather subjective information (pain, satisfaction, perceived stability etc. together with a photograph of the surgical site (Figure 1b); 3) Software to upload the data from the phone to a remote server; 4) An analysis and reporting package that generates, among other metrics, a profile describing the patient's activity throughout the day, trends in the recovery process, and alerts for abnormal findings (Figure 1c). The system was pilot tested on 12 patients (7 females) who underwent TKA. Complete days of data collection were scheduled for each patient every two weeks until 12 weeks, starting during the second week after surgery. Results. Patients tolerated the system well and datasets of up to 13 hours long were recorded. There was a considerable variation between patients in the use of the prosthetic knee joint at a given time point after surgery. At 6 weeks post-surgery, for example, some relatively inactive subjects had less than 50 excursions per hour while active subjects exhibited more than 750 excursions per hour. It was notable that, in activities of daily living, subjects rarely used the extremes of the flexion range that had been measured during post-operative clinic visits. Examples of activity recognition during free-living will be presented. Discussion. A remote knee monitoring system has been designed and successfully tested in an outpatient setting. The system has revealed discrepancies between knee function measured during clinic visits and that measured remotely during free living. Remote monitoring after orthopaedic procedures adds an important new dimension to the assessment of patient outcome. Acknowledgments. This work was supported by grants from the Washington Research Foundation and The Wallace H. Coulter Translational Partnership at the University of Washington


Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_13 | Pages 18 - 18
1 Sep 2014
Moolman C Dix-Peek S Mears S Hoffman E
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Aim. To determine the preferable treatment for congenital pseudarthrosis of the tibia, we retrospectively reviewed 19 patients (20 limbs) treated consecutively over a 22 year period (1988–2007). Fifteen were followed up to maturity. The patients were assessed for union, leg length discrepancy (LLD), ankle valgus, range of ankle movement and distal tibial physeal injury. Results. The median age at surgery was 3 years. At surgery nineteen of the tibiae had a dysplastic constriction with a fracture (Crawford II-C or Boyd II) lesion. To obtain union in the 20 tibiae, 29 procedures were done. Nine failed primarily and required a second procedure to obtain union. Older patients (≥ 5 years) had a significantly higher success rate. Excision, intramedullary rodding and bone graft (IMR) was done in 14 tibiae: 10 (71.4%) were successful. Six of 10 primary operations and all 4 secondary operations after a previous failed procedure were successful. Ipsilateral vascularized fibula transfer (IVFT) was successful in 5 tibiae (3 primary and 2 secondary). Ilizarov with bone transport only, failed in two patients. Ilizarov with excision, intramedullary rodding and bone graft with lengthening was successful in 2 of 5 cases (40%); two sustained fractures at the proximal lengthening site. A median leg length discrepancy (LLD) of 3 cms occurred post surgery which was treated with contralateral epiphysiodesis. At maturity 3 patients had a LLD of ≥ 2cms. Six limbs had ankle valgus and were treated with stapling and tibio-fibular syndesmosis. Decreased range of movement of the ankle (< 50%) occurred in 7 patients. Distal tibial physeal injury occurred in 4 patients and was associated with repeated rodding. Conclusion. We concluded that surgery should be delayed as long as possible. If there is adequate tibial purchase for the rod distally, IMR is the best option. If purchase is inadequate, Ilizarov with rodding will avoid ankle stiffness. Epiphysiodesis is preferable to lengthening because of the risk of fracture above the rod. IVFT is a good option as a secondary procedure. NO DISCLOSURES


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXIX | Pages 53 - 53
1 Sep 2012
Nanjayan S Deakin D Milner S
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Introduction. Minimally invasive plate osteosynthesis (MIPO) is a relatively new surgical technique for the management of distal tibial fractures. Conventional open technique is unfavourable to the fracture biology because of excessive soft tissue stripping and can be associated with significant devastating complications. Objective. The aim of this study was to determine the effectiveness of the MIPO technique for distal tibial fractures. Methods. Between 2004 and 2010 twenty-nine consecutive patients had distal tibial fractures treated with MIPO by the senior author. An anteromedial plate (Synthes®) was used for all patients. Case notes and radiographs of all patients were reviewed and data, including demographics, fracture classification, complications and fracture healing were recorded on a database. Results. 29 Patients with a median age of 46 (range 25–82) were reviewed. 12 were female and 17 were male. Mean follow-up was 6.24 months. Using the AO classification there were 16 type A, 1 type B and 12 were type C fractures. Ruedi-Allgower classification showed 6 Group I fractures, 5 Group II fractures and 2 Group III fractures. There were no open fractures. 5 patients had temporary external fixation prior to MIPO. 28 patients had associated fibular fractures of which 6 required open reduction and internal fixation (through a separate surgical incision). There were no postoperative wound complications. No malunion or intraarticular displacement was noted radiographically. Two patients had delayed union but went on to heal without secondary procedures. There was 1 case of non-union. Two patients subsequently had their plates removed due to prominence of the metal work. Conclusion. We conclude that the MIPO technique is safe and effective treatment for the management of distal tibial fractures. Complications associated with MIPO are infrequent and manageable


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXIX | Pages 221 - 221
1 Sep 2012
Morell D Kanakaris N Tan B Giannoudis P
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Objectives. To evaluate management, direct-medical-costs and clinical outcome profile of a large trauma unit with respect to simple elbow dislocations. Methods. All simple elbow dislocations that were defined as not requiring acute surgical intervention, post-reduction, were considered between Jan-2008 and Dec-2010. Inclusion criteria consisted of age greater than 13; absence of major associated fractures, successful closed reduction, and follow-up as an outpatient. The management of these patients was classified in terms of immobilisation time into: short (< 2weeks), standard (2–3weeks) and prolonged (>3weeks). Direct-medical-costs were calculated based on current tariff rates associated with radiology, admission, theatre time (for reductions and recovery) and outpatient attendances. Clinical outcome was evaluated with respect to complications, secondary procedures, and time before discharge from clinic. Results. Of 81 patients in total, 6% required reduction in theatre, 17% admission, 9% were referred to a specialist or had a complication and 42% DNA their final appointment. The mean length-of-immobilisation was 2.25weeks (range 0–6weeks). The median direct-medical-cost was £893 per patient (range £418-£2,693). The median duration of patients' engagement with hospital services was 57days (range 3–831). There was no statistically significant relationship between length-of-immobilisation and time-before-discharge (p=0.42), or associated direct-medical-cost (p=0.586). In terms of clinical outcome the prolonged immobilisation group had a statistically significant worse outcome in comparison to the short (p=0.30) and the standard (p=0.01). The comparison between standard immobilisation and short resulted in a marginally (p=0.08) significant advantage of the first. Conclusion. Prolonged elbow immobilisation is generally associated with increased stiffness and a higher rate of complications. For simple elbow dislocations time-to-mobilisation was variable, as well as the mode of follow-up. The use of standardised protocols of treatment is essential in these type of injuries that are usually managed in an outpatient basis, to minimise the variability between clinical teams, improve outcome, and minimise costs


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_IV | Pages 152 - 152
1 Mar 2012
Ogonda L Laverick M Andrews C
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Introduction. Paediatric tibial fractures, unlike femoral fractures do not have much potential for overgrowth. In simple factures of the tibial shaft treated non-operatively the major problems are shortening and malunion. In complex injuries with extensive soft tissue disruption and bone loss, the long-term aim of reconstruction is to achieve union with a fully functional limb without limb-length inequality. Methods. Four children (Age range 6-12 years) who sustained high-energy grade III open fractures of the tibia were treated with acute shortening and bone transport. Any soft tissue reconstructive and secondary grafting procedures for delayed union were recorded. The children were prospectively followed up to fracture union. Distraction ostegenesis proceeded until limb length equality was achieved and the regenerate allowed to consolidate. Results. Three children had grade 3B injuries, 2 requiring flap reconstruction. One had a grade 3A injury. Mean acute shortening was 4.4cm (Range 2-9cm). Distraction osteogenesis was used to achieve limb-length equalisation. 2 children required secondary bone graft procedures to achieve union. At 3 years from injury, all children had overgrowth of the injured leg averaging 2cm. Discussion. Despite achieving equal limb lengths at the end of distraction osteogenesis the injured tibia overgrew by a mean of 2cm at three years post injury. This would suggest that even in the presence of extensive soft tissue trauma, as seen in these high energy injuries, the increased blood flow associated with metaphyseal corticotomy stimulates epiphyseal activity resulting in overgrowth. The value of stopping adjustments just short of achieving limb length equality to allow for expected overgrowth in the injured tibia merits further investigation


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_III | Pages 43 - 43
1 Feb 2012
Fischer J Changulani M Davies R Nayagam S
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This study sought to determine if treatment of resistant clubfeet by the Ilizarov method influenced the pattern of recurrence. Forty-seven children were identified as having undergone treatment by the Ilizarov method. Inclusion criteria for treatment with the Ilizarov method were clubfeet belonging to diagnostic categories that had recognised tendencies for resistance to standard methods of clubfoot management or a previous history of soft tissue releases performed adequately but accompanied by rapid relapse. There were 60 feet with a mean follow-up of 133 months (46-224). Diagnoses included 34 idiopathic types, 7 arthrogryposis, 1 cerebral palsy, and 5 other. Summary statistics and survival analysis was used; failure was deemed as a recurrence of fixed deformity necessitating further correction. This definition parallels clinical practice where attainment of ‘normal’ feet in this group remains elusive, and mild to moderate relapses that remain passively correctable are kept under observation. Soft tissue releases were common primary or secondary procedures. The mean time to revision surgery, if a soft tissue release was undertaken as a primary procedure, was 36 months (SD 22), and 39 (SD 23) months if undertaken for the second time. This compares with 52 months (SD 32) if Ilizarov surgery was used. Using survival analysis, there is a 50% chance of a relapse sufficiently marked to need corrective surgery after 44 months following the first soft tissue release, 47 months if after the second soft tissue procedure and 120 months after the Ilizarov technique. We conclude that resistant club feet, defined as those belonging to diagnostic categories with known poor prognoses or those that succumb to an early relapse despite adequate soft tissue surgery, may have longer relapse-free intervals if treated by the Ilizarov method