Introduction. While manual total knee arthroplasty (MTKA) procedures have demonstrated excellent clinical success, occasionally intraoperative damage to soft tissues can occur. Robotic-arm assisted technology is designed to constrain a sawblade in a haptic zone to help ensure that only the desired bone cuts are made. The objective of this cadaver study was to quantify the extent of soft tissue damage sustained during TKA through a robotic-arm assisted (RATKA) haptically guided approach and conventional MTKA approach. Methods. Four surgeons each prepared six cadaveric legs for CR TKA: 3 MTKA and 3 RATKA, for a total of 12 RATKA and 12 MTKA knees. With the assistance of an arthroscope, two independent surgeons graded the damage of 14 knee structures: dMCL, sMCL, posterior oblique ligament (POL), semi-membranosus muscle tendon (SMT), gastrocnemius muscle medial head (GMM), PCL, ITB, lateral retinacular (LR), LCL, popliteus tendon, gastrocnemius muscle lateral head (GML), patellar ligament, quadriceps tendon (QT), and extensor mechanism (EM). Damage was defined as tissue fibers that were visibly torn, cut, frayed, or macerated. Percent damage was averaged between evaluators, and grades were assigned: Grade 1) complete soft tissue preservation to ≤5% damage; Grade 2) 6 to 25% damage; Grade 3) 26 to 75% damage; and Grade 4) 76 to 100% damage. A Wilcoxon Signed Rank Test was used for statistical comparisons. A p-value <0.05 was considered statistically significant. Results. Significantly less damage occurred to the PCL in the RATKA than the MTKA specimens (p=0.004). RATKA specimens had less damage to the dMCL (p=0.186), ITB (p=0.5), popliteus (p=0.137), and patellar ligament (p=0.5). The sMCL, POL, SMT, GMM, GML, LR, LCL, QT, and EM were grade 1 in all MTKA and RATKA specimens. No intentional soft tissue releases were performed in either group to balance the knee. Discussion/Conclusion. The results of this study indicate that RATKA may result in less soft-tissue damage than MTKA, especially to the posterior cruciate ligament. This finding can potentially be attributed to RATKA using a haptic boundary to constrain the sawblade, which can help prevent unwanted soft-tissue damage. However, since any damage was post-operatively assessed and in a cadaveric model, further investigations on soft-tissue damage from patients with clinical outcomes should be performed

Aim

The incidence of deep infections after internal fixation of ankle and lower leg fractures is estimated 1 to 2%. Hindfoot arthrodesis by retrograde intramedullary nailing (IMN) is a potential alternative to external fixation for post-infectious ankle destruction. The aim of this study was to evaluate the clinical results, complications and effects of soft tissue management with this treatment modality.

Intimate partner violence (IPV) causes significant morbidity and its unlikely to be reported compared to other forms of gender-based violence (GBV). For early detection, understanding Orthopaedic injuries from GBV is vital. This study assesses the pattern of musculoskeletal injuries from GBV and determines the factors associated with it. It is a retrospective observational study of patients aged ≥18 years, with GBV-related acute Orthopaedic injuries. Data was reviewed from January 2021 to December 2021, including, demographic information, soft tissue and bony injuries, relationship to assailant, substance abuse and the day and time of injury. Frequencies and percentages for categorical data were analysed. Chi-square test was used to calculate association. T-test was used to compare groups for continuous & categorical variables. Multivariate analysis was conducted to find the odds ratio and a p-value <0.05 was statistically significant. 138 patients were included, the mean age at presentation being 35.02 years (SD=11). 92.75% of GBV victims were females. Most were unemployed (66.7%). 30.43% (n-42) had a soft tissue injury; superficial laceration being the most common (23.1%), flexor tendon injury (10.87%), hand abscess (5.8%), and extensor tendon injury (5.07%). 71.02 % (n=98) sustained appendicular fractures. 51.45% (n=71) sustained upper limb fractures; distal radius fractures (10.86%) and distal 3rd ulnar fractures (9,42%). 19.57% (n=27) had lower limb fractures; 7.25% (n=10) had lateral malleolus ankle fractures. 63.7% (n=80) of cases were by an intimate partner on weekends (50.73%). 62.31% occurred between 16h00 and 0h00. 41.1% (n=65) reported alcohol abuse. 63.04% had surgery. GBV likely occurs in early middle-aged females by intimate partners influenced by alcohol over the weekends between 16h00 to 0h00. Distal radius/distal 3rd ulnar fractures are the most common bony injuries. Superficial wrist laceration is the commonest soft tissue injury. These findings may assist with early detection and intervention to prevent adverse outcomes in GBV

Introduction. Open fractures of the tibia are disabling injuries with a significant risk of deep infection. Treatment involves early antibiotic administration, early and aggressive surgical debridement, and may require complex soft tissue coverage techniques. The extent of disruption to the skin and soft-tissue envelope often varies, with ‘simple’ open fractures (defined by the Orthopaedic Trauma Society (OTS) open fracture severity classification) able to be closed primarily, whilst others may require shortening or soft-tissue reconstruction. This study aimed to determine whether OTS simple tibial open fractures received different rates of adequate debridement and plastic surgical presence at initial debridement, compared with OTS complex injuries, and whether rates of fracture-related infection, nonunion, or reoperation differed between the groups. Materials & Methods. A consecutive series of open tibia fractures managed at a tertiary UK Major Trauma Centre between January 2021 and November 2022 were included. Patient demographics, injury characteristics, timing of antibiotic delivery, timing and method of definitive fixation, and frequency of plastic surgical presence at initial debridement were retrospectively collected. The delivery of bone ends at initial debridement was used as a proxy for adequacy of surgical debridement. The primary outcome measure was rate of fracture-related infection, secondary outcomes included rates of reoperation, nonunion, and amputation. Chi2 Tests and independent samples T-tests were used to assess nominal and continuous outcomes respectively between simple and complex injuries. Ordinal data was assessed using nonparametric equivalent tests. Results. 79 patients with open fractures of the tibia were included. 70.8% of patients were male, with mean age 50.4 years (SD 19.2) and BMI 26.4 Kg/m2 (SD 6.0). Injuries were mostly sustained by low-energy falls (n = 28, 35.4%) and from road traffic accidents (n = 26, 32.9%). 27 (34.2%) were OTS simple open fractures. Simple open fractures were most commonly Gustillo-Anderson grade 1 (38.5%), or 2 (30.8%), whilst complex open fractures were mostly grade 3B (66.7%) (p < 0.001). Fracture-related infection rates in OTS simple and complex open fractures were 25.9% and 25.5% respectively (p = 0.967), and nonunion rates were 32% and 37.8% (p = 0.637). Primary amputation was less common in simple (0%) than in complex open fractures (20%, p = 0.012), there were no differences in delayed amputation rates (7.4% and 6% respectively, p = 0.811). Simple open fractures were less likely to have plastic surgeons present at initial debridement compared to complex open fractures (18.5% and 44%, p = 0.025), and less likely to have bone ends delivered through the skin at initial debridement (25.9% and 61.2%, p = 0.003). There were no differences in patient age, delays to antibiotic administration, or reoperation rates between OTS simple and OTS complex fractures (p > 0.05). Conclusions. Despite involving less significant soft tissue injury, OTS simple open tibia fractures had comparable deep infection and nonunion rates to complex fractures and received early plastic surgical input and adequate debridement less frequently. The severity of open fractures with less significant soft tissue injury may be underrecognized and therefore undertreated, although further prospective study is needed

Introduction. Virtual fracture clinics (VFC's) aim to reduce the number of outpatient appointments while improving the clinical effectiveness and patients experience through standardisation of treatment pathways. With 4.6% of ED admissions due to trauma the VFC prevents unnecessary face to face appointments providing a cost savings benefit to the NHS. Methods. This project demonstrates the importance of efficient VFC process in reducing the burden on the fracture clinics. We completed preformed a retrospective cross-sectional study, analysing two cycles in May (n=305) and September (n=332) 2021. We reviewed all VFC referrals during this time assessing the quality of the referral, if they went on to require a face to face follow up and who the referring health care professional was. Following the cycle in May we provided ongoing education to A&E staff before re-auditing in September. Results. Between the two cycles there was an average 19% improvement in quality of the referrals, significant reduction in number of inappropriate referrals for soft tissue knee and shoulder injuries from 15.1% (n=50) to 4.5% (n=15) following our intervention. There was an 8% increase in number of fracture clinic appointments to 74.4% (n=247), primarily due to an increase number of referrals from nurse practitioners. Radial head fractures were targeted as one group that were able to be successfully managed in VFC, despite this 64% (n=27) of patients were still seen in the outpatient department following VFC referral. Conclusion. Despite the decrease in the number of inappropriate referrals, and the increase in quality of referrals following our intervention. The percentage of VFC referrals in CAVUHB is still higher than other centres in with established VFCs in England. This possibly highlights the need for further education to emergency staff around describing what injuries are appropriate for referral, specifically soft tissue injuries and radial head fractures. In order to optimise the VFC process and provide further cost savings benefits while reducing the strain on fracture clinics

Over half of postpartum women experience pelvic ring or hip pain, with multiple anatomic locations involved. The sacroiliac joints, pubic symphysis, lumbar spine and pelvic girdle are all well documented pain generators. However, despite the prevalence of postpartum hip pain, there is a paucity of literature regarding underlying soft tissue intra-articular etiologies. The purpose of this systematic review is to document and assess the available evidence regarding underlying intra-articular soft tissue etiologies of peri- and postpartum hip pain. Three online databases (Embase, PubMed and Ovid [MEDLINE]) were searched from database inception until April 11, 2021. The inclusion criteria were English language studies, human studies, and those regarding symptomatic labral pathology in the peri- or postpartum period. Exclusion criteria were animal studies, commentaries, book chapters, review articles and technical studies. All titles, relevant abstracts and full-text articles were screened by two reviewers independently. Descriptive characteristics including the study design, sample size, sex ratio, mean age, clinical and radiographic findings, pathology, subsequent management and outcomes were documented. The methodological quality of the included studies was assessed using the Methodological Index for Non-Randomized Studies (MINORS) instrument. The initial search identified 2472 studies. A systemic screening and assessment of eligibility identified 5 articles that satisfied the inclusion criteria. Twenty-two females were included. Twenty patients presented with labral pathology that necessitated hip arthroscopy with labral debridement or repair with or without acetabuloplasty and/or femoroplasty. One patient presented with an incidental labral tear in the context of osteitis condensans illi. One patient presented with post-traumatic osteoarthritis necessitating a hip replacement. The mean MINORS score of these 5 non-comparative studies was 2.8 (range 0-7) demonstrating a very low quality of evidence. The contribution of intra-articular soft tissue injury is a documented, albeit sparse, etiology contributing to peri- and postpartum hip pain. Further research to better delineate the prevalence, mechanism of injury, natural history and management options for women suffering from these pathologies at an already challenging time is necessary to advance the care of these patients

Traditionally, sports Injuries have been sub-optimally managed through Emergency Departments (ED) in the public health system due to a lack of adequate referral processes. Fractures are ruled out through plain radiographs followed by a reactive process involving patient initiated further follow up and investigation. Consequently, significant soft tissue and chondral injuries can go undiagnosed during periods in which early intervention can significantly affect natural progression. The purpose of this quality improvement project was to assess the efficacy of an innovative Sports Injury Pathway introduced to detect and treat significant soft tissue injuries. A Sports Injury Pathway was introduced at Fiona Stanley Hospital (WA, Australia) in April 2019 as a collaboration between the ED, Physiotherapy and Orthopaedic Departments. ED practitioners were advised to have a low threshold for referral, especially in the presence of a history of a twisting knee injury, shoulder dislocation or any suggestion of a hip tendon injury. All referrals were triaged by the Perth Sports Surgery Fellow with early follow-up in our Sports Trauma Clinics with additional investigations if required. A detailed database of all referrals was maintained, and relevant data was extracted for analysis over the first 3 years of this pathway. 570 patients were included in the final analysis. 54% of injuries occurred while playing sport, with AFL injuries constituting the most common contact-sports injury (13%). Advanced Scope Physiotherapists were the largest source of referrals (60%). A total of 460 MRI scans were eventually ordered comprising 81% of total referrals. Regarding Knee MRIs, 86% identified a significant structural injury with ACL injuries being the most common (33%) followed by isolated meniscal tears (16%) and multi-ligament knee injuries (11%). 95% of Shoulder MRI scans showed significant pathology. 39% of patients required surgical management, and of these 50% were performed within 3 months from injury. The Fiona Stanley Hospital Sports Injury Pathway has demonstrated its clear value in successfully diagnosing and treating an important cohort of patients who present to our Emergency Department. This low threshold/streamlined referral pathway has found that the vast majority of these patients suffer significant structural injuries that may have been otherwise missed, while providing referring practitioners and patients access to prompt imaging and high-quality Orthopaedic sports trauma services. We recommend the implementation of a similar Sports Injury Pathway at all secondary and tertiary Orthopaedic Centres

Background. Use of a robotic tool to perform surgery introduces a risk of unexpected soft tissue damage due to the uncommon tactile feedback for the surgeon. Early experience with robotics in total hip and knee replacement surgery reported having to abort the procedure in 18–34 percent of cases due to inability to complete preoperative planning, hardware and soft tissue issues, registration issues, as well as concerns over actual and potential soft tissue damage. These can result in significant morbidity to the patient, negating all the desired advantages of precision and reproducibility with robotic assisted surgery. The risk of soft tissue damage can be mitigated by haptic software prohibiting the cutting tip from striking vital soft tissues and by the surgeon making sure there is a clear workspace path for the cutting tool. This robotic total knee system with a semi-active haptic guided technique was approved by the FDA on 8/5/2015 and commercialized in August of 2016. Two year clinical results have not been reported to date. Objective. To review an initial and consecutive series of robotic total knee arthroplasties for safety in regard to avoidance of known or delayed soft tissue injuries and the necessity to abort the using the robot to complete the procedure. Report the clinical outcomes with robotic total knee replacement at or beyond two years to demonstrate no delayed effect on expected outcome. Methods. The initial consecutive series of 65 Triathlon. TM. total knee replacements using a semi-active haptic guided system that were performed after commercialization that would be eligible for two year follow-up were reviewed. Pre-operative planning utilizing CT determined the implant placement and boundaries and thus the limit of excursion from any part of the end effector saw tip. Self-retaining retractors were also utilized. Operative reports, 2, 6, and 12 week, and yearly follow-up visit reports were reviewed for any evidence of inadvertent injury to the medial collateral ligament, patellar tendon, or a neurovascular structure from the cutting tool. Operative notes were also reviewed to determine if the robotic procedure was partially or completely aborted due to any issue. Knee Society Knee Scores (KS-KS) and Functional Scores (KS-FS) were recorded from pre-operative and yearly. Any complications were recorded. Results. 40 cases had two year follow-up. The average follow-up for this series was 1.51 years. No cases were unable to be completed robotically. No case had evidence for acute or delayed injury to the medial collateral ligament, patellar tendon, or neurovascular structure. The only complication was a revision total knee for tibial component loosening after a fall induced periprosthetic tibial fracture. Average pre-operative KS-KS and KS-FS improved from 46.9 and 52.1 to 99.2 and 88.6 at one year follow-up, 100.5 and 86.9 at two year follow-up. Conclusions. A semi-active haptic guided robotic system is a safe and reliable method to perform total knee replacement surgery. This series of initial robotic arm assisted surgery had no intraoperative or delayed soft tissue injuries. Preliminary short-term outcomes at up to two years show excellent outcomes

29 cases of complex elbow injuries were reviewed at a mean period of 15 months. Outcome measures included MEPS and DASH score. Patients who had defined early surgery were significantly better than those in whom surgery was delayed. We concluded that Management of complex elbow injuries can be improved by early definitive surgery. The magnitude and type of soft tissue injuries should be identified. MRI scans should be liberally used for this purpose. We believe that early, adequate and appropriate management of soft tissue injuries including use of articulated external fixator for early mobilisation improves the outcome of complex elbow injuries

Introduction/Aim. The NAVIO robotic-assisted TKA (RA-TKA) application received FDA clearance in May 2017. This semi-active robotic technique aims to improve the accuracy and precision of total knee arthroplasty. The addition of robotic-assisted technology, however, also introduces another potential source of surgery-related complications. This study evaluates the safety profile of NAVIO RA-TKA. Materials and Methods. Beginning in May 2017, the first 250 patients undergoing NAVIO RA-TKA were included in this study. All intra-operative complications were recorded, including: bleeding; neuro-vascular injury; peri-articular soft tissue injury; extensor mechanism complications; and intra-operative fracture. During the first 90 days following surgery, patients were monitored for any post-operative complications, including: superficial and deep surgical site infection; pin-tract infection; pin site fractures; peri-prosthetic fractures; axial or sagittal joint instability; axial mal-alignment; patello-femoral instability; DVT/PE; re-operation or re-admission due to surgical-related complications. Surgical technique and multi-modality pain management protocol was consistent for all patients in the study. A combined anesthetic technique was employed for all cases, including: low-dose spinal, adductor canal block and general anesthetic. Patients were mobilized per our institution's rapid recovery protocol. Results. No patients were lost to follow-up. During the study period, no intra-operative complications were recorded. Specifically, no complications related to the introduction of the high-speed burr associated with the NAVIO RA-TKA were noted. Within the 90-day follow-up period, there was one case of deep infection. One patient sustained a fall resulting in a peri-prosthetic femoral fracture, that occurred remote from the femoral pin tracts. No cases of axial or sagittal joint instability, axial mal-alignment, patello-femoral instability, pin site infections or fractures; or DVT/PE were identified. Four patients underwent manipulation under anesthesia. No other patients required a re-operation or re-admission due to surgical-related complications. Discussion/Conclusions. The initial experience with the NAVIO robotic assisted total knee arthroplasty has demonstrated excellent safety profile. Relative to known risks associated with total knee arthroplasty, no increased risk of peri-operative complications, re-operation or re-admission for surgical related complications was identified with the introduction of the NAVIO RA-TKA

A reverse total shoulder arthroplasty (RSA) is frequently performed in the revision setting. The purpose of this study was to report the clinical outcomes and complication rates following revision RSA (RRSA) stratified according to the primary shoulder procedure undergoing revision, including failed hemiarthroplasty (HA), anatomic total shoulder arthroplasty (TSA), RSA, soft tissue repair (i.e., rotator cuff repair), and open reduction internal fixation (ORIF). A systematic review of the literature was performed using four databases (EMBASE, Medline, SportDISCUS, and Cochrane Controlled Trials Register) between January 1985 and September 2017. The primary outcomes of interest included active range-of-motion (ROM), pain, and functional outcome measures including the American Shoulder and Elbow Surgeons Score (ASES), Simple Shoulder Test (SST), and Constant-Murley (CS) Score. Secondary outcomes included complication rates, such as infection, dislocation, perioperative fracture, base plate failure, neurovascular injury, soft tissue injury, and radiological evidence of scapular notching. Clinical outcome data was assessed for differences between preoperative and postoperative results and complication results were reported as pooled complication rates. Forty-five studies met the inclusion criteria for analysis, which included 1,016 shoulder arthroplasties with a mean follow-up of 45.2 months (range, 31.1 to 57.2 months) (Fig. 1). The mean patient age at revision was 60.2 years (range, 36 to 65.2 years). Overall, RSA as a revision procedure for failed HA revealed favorable outcomes with respect to forward elevation (FE), CS pain, ASES, SST, and CS outcome assessment scores, with mean improvements of 52.5° ± 21.8° (P = < 0 .001), 6.41 ± 4.01 SD (P = 0.031), 20.1 ± 21.5 (P = 0.02), 5.2 ± 8.7 (P = 0.008), and 30.7 ± 9.4 (P = < 0 .001), respectively. RSA performed as a revision procedure for failed TSA demonstrated an improvement in the CS outcome score (33.8 ± 12.4, P = 0.016). RSA performed as a revision procedure for failed soft tissue repair demonstrated significant improvements in FE (60.2° ± 21.2°, P = 0.031) and external rotation (20.8° ± 18°, P = 0.016), respectively. Lastly, RSA performed as a revision procedure for failed ORIF revealed favorable outcomes in FE (61° ± 20.2°, P = 0.031). There were no significant differences noted in RSA performed as a revision procedure for failed RSA, or when performed for a failed TSA, soft tissue repair, and ORIF in any other outcome of interest. Pooled complication rates were found to be highest in failed RSA (10.9%), followed by soft tissue repair (7.1%), HA (6.8%), TSA (5.4%) and ORIF (4.7%). When compared to other revision indications, RRSA for failed HA demonstrated the most favorable outcomes, with significant improvements in ROM, pain, and in several outcome assessments. Complication rates were determined and stratified as per the index procedure undergoing RRSA, patients undergoing revision of a failed RSA were found to have the highest complication rates. With this additional information, orthopaedic surgeons will be better equipped to provide preoperative education regarding the risks, benefits and complication rates to those patients undergoing a RRSA. For any figures or tables, please contact authors directly

Introduction. Ligament reconstruction following knee soft tissue injuries, such as posterior cruciate ligament (PCL) tears, aim to restore normal joint function and motion; however, persistant pathomechanical joint behavior indicates that there is room for improvement in current reconstruction techniques. Increased attention is being directed towards the roles of secondary knee stabilizers, in an attempt to better understand their contributions to kinematics of knees. The objective of this study is to characterize the relative biomechanical contributions of the posterior oblique ligament (POL) and the deep medial collateral ligament (dMCL) in PCL-deficient knees. We hypothesized that, compared with the POL, the dMCL would have a more substantial role in stabilizing the medial side of the knee, especially in flexion (slack POL). Methods. Seven fresh-frozen cadaveric knees were used in this study (age 40–62, 4 female, 3). Specimens were potted and mounted onto a VIVO joint motion simulator (AMTI). Once installed, specimens were flexed from 0 to 90 degrees with a 10 N axial load and all remaining degrees of freedom unconstrained. This was repeated with (a) a 67 N posterior load, (b) a 2.5 Nm internal or external rotational moment and (c) a 50 N posterior load and 2.5 Nm internal rotational moment applied to the tibia. During each resulting knee motion, the relative AP kinematics of the dMCL tibial insertion (approximated as the most medial point of the proximal tibia) with respect to the flexion axis of the femur (the geometric center axis, based on the posterior femoral condyles) were calculated at 0, 30, 60 and 90 degrees of flexion. These motions were repeated following dissection of the PCL and then further dissection of either medial ligament (4 POL, 3 dMCL). The changes in AP kinematics due to ligament dissection were analyzed using three-way repeated-measures ANOVA with a significance value of 0.05. Results. Dissection of the dMCL or POL did not result in a statistically significant increase in the posterior displacement of the medial tibial point under posterior directed force, internal rotation moments, or the combined posterior force plus internal rotation moment. Interestingly, under external moment loading, there was a statistically significant increase in anterior displacement of the medial tibia at all flexion angles after POL dissection, by up to 3.0+/−2.6 mm at 0 degrees. Dissection of the dMCL, however, did not have a significant affect. Conclusion. Our results showed that neither the POL nor dMCL play a significant role in resisting posterior tibial displacements on the medial side of a PCL deficient knee. Of the two, the POL appears to have a greater contribution towards preventing anterior translations, particularly when in extension. This finding is rational based on the anatomical path of this ligament wrapping around the femoral medial condyle under external rotational moments. In contrast with our hypothesis, it was observed that the dMCL had less of an effect on medial knee stability. Contributions of these ligaments could be further investigated using more complicated loading, such as those more representative of activities of daily living

The vast majority of fractures around the knee will heal with well-done internal fixation. TKA has a role in several scenarios. Acute TKA can be effective for fractures of the distal femur (especially periprosthetic) in very elderly patients where internal fixation attempts are likely to fail. Acute TKA for tibia plateau fractures may have a role in fractures in the elderly with pre-existing DJD and relatively simple fracture patterns. There is very little published literature regarding the outcomes of TKA for acute tibial plateau fracture and caution is advised until more data is available. TKA is commonly indicated for failed fixation and post-traumatic arthritis. Challenges include managing retained hardware, soft tissue injury and contracture, unusual ligamentous imbalances, and multiple prior incisions and/or flaps. Occasionally, a partial hardware removal may be appropriate. If extensive or multiple incisions are needed for hardware removal it may be wise to stage the reconstruction after soft tissue recovery. The available data on TKA for post-traumatic reconstructions generally demonstrate predictable functional improvement but higher complications

Purpose. The recent emergence of autologous blood concentrates, such as platelet rich plasma (PRP), as a treatment option for patients with orthopaedic injuries has led to an extensive debate about their clinical benefit. Our objective was to determine the effectiveness of autologous blood concentrates compared with control therapy in improving pain in patients with orthopaedic bone and soft tissue injuries. Method. We conducted a systematic review of MEDLINE and EMBASE from 1996 and 1947, respectively, up to July 2010. Additional studies were identified by contacting experts, searching the bibliographies of the included studies as well as orthopaedic meeting archives. We included published and unpublished randomized controlled trials or prospective cohort studies that compared autologous blood concentrates with a control therapy in patients with an orthopaedic injury. Two reviewers, working in duplicate, abstracted data on study characteristics and protocol. Reviewers resolved disagreement by consensus. Results. We identified 18 randomized trials and nine prospective cohort studies. There was a lack of consistency in outcome measures across all studies. Four randomized controlled trials (N=275) and three prospective cohort studies (N=88) reported visual analog scale (VAS) scores when comparing platelet rich plasma with a control therapy across injuries to the acromion, lateral epicondyle, anterior cruciate ligament, patella, tibia and spine. There was no significant benefit for platelet rich plasma up to and including six months across randomized trial (standardized mean difference −0.35; 95% confidence interval, −0.98 to 0.28) or prospective cohort data (standardized mean difference −0.20; 95% confidence interval, −0.64 to 0.23). Conclusion. There is a lack of evidence to support the efficacy of platelet rich plasma and autologous blood concentrates as a treatment modality for orthopaedic bone and soft tissue injuries. The literature is further complicated by a lack of standardization in study protocols, platelet separation techniques, and outcome measures

We describe a new surgical approach designed for use with minimally invasive fixation and a circular frame. Tibial pilon injuries are often associated with significant soft tissue injury, which may not be evident at the time of injury. In such cases standard surgical approaches can lead to problems with wound healing, thus increase the risk of deep infection. AO Type C valgus fractures are commonly associated with fibula fractures. We found that the anterior syndesmotic ligaments are often disrupted with sparing of the lateral soft tissue envelope. Our technique utilizes a direct lateral approach to expose the lateral malleolus/distal fibula, which is reflected postero-laterally through the fracture and intact posterior syndesmotic ligaments. This creates a direct view of posterolateral and anterolateral comminution and talar dome allowing direct fixation of fragments with minimal internal fixation. Fibula fixation is performed with a 1/3. rd. tubular plate and the anterior syndesmotic ligaments are repaired. From 2007–2009, we used this approach in 12 patients (Male 9: Female 3; age 19–42) with AO Type C3 fractures with significant soft tissue injury (open = 2/ closed = 10; Tscherne Grade 1 = 4; Grade 2 = 8). We used circular frame stabilization in all cases (in four patients an additional foot frame was applied to protect the articular surface). All fractures united in satisfactory alignment. Wound healed well in all cases. One case of gouty arthritis developed superficial infection, which went on to heal after wound wash out and oral antibiotic therapy. Follow-up (minimum 3 months and maximum 2 years) showed no ankle instability. Clinical evaluation revealed a mean dorsiflexion of 10° (5–15°) and mean plantar flexion of 35° (15–60°). We conclude that transfibular approach gives good exposure of lower tibial articular surface in selected cases of pilon fractures with least soft tissue disruption

Background. Use of a robotic tool to perform surgery introduces a risk of unexpected soft tissue damage due to the lack of tactile feedback for the surgeon. Early experience with robotics in total hip and knee replacement surgery reported having to abort the procedure in 18–34 percent of cases due to inability to complete preoperative planning, hardware and soft tissue issues, registration issues, as well as concerns over actual and potential soft tissue damage. These damages to the soft tissues resulted in significant morbidity to the patient, negating all the desired advantages of precision and reproducibility with robotic assisted surgery. The risk of soft tissue damage can be mitigated by haptic software prohibiting the cutting tip from striking vital soft tissues and by the surgeon making sure there is a clear workspace path for the cutting tool. This robotic total knee system with a semi-active haptic guided technique was approved by the FDA on 8/5/2015 and commercialized in August of 2016. One year clinical results have not been reported to date. Objective. To review an initial and consecutive series of robotic total knee arthroplasties for safety in regard to avoidance of known or delayed soft tissue injuries and the necessity to abort the robotic assisted procedure and resort to the use of conventional implantation. Report the clinical outcomes with robotic total knee replacement at or beyond one year to demonstrate satisfactory to excellent performance. Methods. The initial consecutive series of 100 robotic total knee replacements using a semi-active haptic guided system including 34 from the initial IDE series in 2014 and those performed after commercial approval beginning in 2016 were reviewed. Pre- operative planning utilizing CT determined the implant placement and boundaries and thus the limit of excursion from any part of the end effector saw tip. Self-retaining retractors were also utilized. Operative reports, 2, 6, and 12 week, and yearly follow-up visit reports were reviewed for any evidence of inadvertent injury to the medial collateral ligament, patellar tendon, or a neurovascular structure from the cutting tool. Operative notes were also reviewed to determine if the robotic procedure was partially or completely aborted due to any issue. Knee Society and Functional scores were recorded from pre-operative and yearly. Results. No cases were unable to be completed robotically. No case had evidence for acute or delayed injury to the medial collateral ligament, patellar tendon, or neurovascular structure. The average follow-up for this series was 1.54 years. Average pre- operative Knee Society and Functional Scores improved from 44.7 and 50 to 98.1 and 87.8 at one year follow-up, 93.8 and 83.1 at two year follow-up, 98.5 and 87.7 at three year follow-up, and 99 and 85 at four year follow-up. Conclusions. A semi-active haptic guided robotic system is a safe and reliable method to perform total knee replacement surgery. Preliminary short-term outcomes data shows excellent clinical and functional results

Stiffness remains one of the most common, and challenging postoperative complications after TKA. Preoperative motion and diagnosis can influence postoperative motion, and careful patient counseling about expectations is important. Postoperative stiffness should be evaluated by ruling out infections, metal allergy, or too aggressive physical therapy. A careful physical and radiographic examination is required. Manipulation under anesthesia (MUA) in selected cases can be helpful. The best timing to perform MUA is between the 6th and 10th week postoperatively. Careful technique is required to minimise the risk of fracture or soft tissue injury. This requires complete paralysis! For more chronic stiffness, revision may be indicated if an etiology can be identified. An excessively thick patellar resurfacing, an overstuffed tibia insert, an oversized femoral component, or gross malrotation should be corrected. During revision, thorough synovectomy, release of contractures, ligamentous balancing and restoration of the joint line is required. Careful attention to component rotation, and sizing is critical. Downsizing components is helpful to place less volume into the joint space. Patients should be counseled that the results of revision for stiffness are mixed and somewhat unpredictable. More frequent postoperative nurturing is helpful to guide rehabilitation progress. Manipulation after revision at 6 weeks is almost expected

Joint assessment through manual physical examination is a fundamental skill that must be acquired by orthopaedic surgeons. These joint assessments allow surgeons to identify soft tissue injuries (e.g. ligament tears) which are critical in identifying appropriate treatment options. The difficulty in communicating the feeling of different joint conditions and the limited opportunities for practice can make these skills challenging to learn, resulting in reduced treatment effectiveness and increased costs. This research seeks to improve the training of joint assessment with the creation of a haptic joint simulator that can train surgeons with increased effectiveness. A first of its kind haptic simulator is presented, which incorporates: a newly defined kinetic knee simulation, a haptic device for user interaction, and a haptic control algorithm. The knee model has been specifically created for this application and allows six degree-of-freedom manipulation of the tibia while considering the effects of ten knee ligament bundles. The model has been mathematically formulated to allow for the high update rates necessary for smooth and stable haptic simulation. Two quantitative assessments were made of the model to confirm its clinical validity. The first was against the widely used OpenSim biomechanical simulation software. Simulations of the model's performance for both anterior-posterior draw tests and varus-valgus rotation tests showed less than 0.7%RMSE for force and 5.5%RMSE for moments. Crucially, the proposed model could generate updated forces in less than 1ms, compared to 188ms for OpenSim. The second validation of the model was against a cadaveric knee that was tested using a validated robotic testing platform. This comparison showed that the model could generate similar force- motion pathways to the cadaveric knee after the model's parameters were scaled to match. Having demonstrated that it is possible to create a computational knee model that has good conformance to gold-standard knee simulations and cadaveric recordings, while updating at less than 1ms, this research has overcome a major hurdle. The next stage of this research will be to incorporate the knee model into a full haptic simulator and perform skill acquisition trials. Given the effectiveness of past haptic training systems in aiding clinical skills acquisition, this research offers a promising way to improve surgeon training, and therefore also patient diagnosis and treatment

INTRODUCTION. The direct anterior approach to THR has become an increasingly popular minimally-invasive technique in an effort to minimize dislocation risk, facility early recovery, and diminish soft tissue injury. However, it has been associated with unique complications including intraoperative femur fracture, cutaneous nerve palsy, stem subsidence, and wound healing complications. These risk of these complications have been documented to be more likely in the surgeon's early experience with the approach. The minimally-invasive Supercapsular Percutaneous-Assisted (SuperPATH) technique was developed to minimize capsular and short-external rotator injury, minimize dislocation risk, and provide an easier transition from the standard posterior approach. METHODS. Fifty (50) consecutive elective total hip replacements in 48 patients were performed using the SuperPATH technique. These also represented the first fifty elective THRs the surgeon performed in practice. Indications were primary or secondary osteoarthritis (92%), avascular necrosis (6%), and impending pathologic fracture (2%). Patients were evaluated retrospectively for dislocation, major, and minor complications. RESULTS. At average follow-up of 10.9 months (Range 1–27 months), there were no dislocation events. There was one periprosthetic fracture identified at 14-day follow-up that required femoral revision surgery in an elderly female patient with osteoporosis. Otherwise, there were no reoperations for any reason. There were no wound complications or deep infections. There was one stem subsidence (2%) of 4 mm. There were no neurovascular injuries. CONCLUSION. The SuperPATH technique can likely be performed at an early experience level with low early complication risk and lower early dislocation risk. This minimally-invasive technique deserves further interest and evaluation as it may present a gentle learning-curve to surgeons

Introduction. Total hip arthroplasty (THA) is a common operation. Different operative approaches have specific benefits and compromises. Soft tissue injury occurs in total hip arthroplasty. This prospective study objectively measured muscle volume changes after direct anterior and posterior approach surgeries. Methods. Patients undergoing Direct Anterior Approach (DAA) and Posterior Approach (PA) THA were prospectively evaluated. 3 orthopaedic surgeons performed all surgeries. Muscle volumes of all major muscles around the hip were objectively measured using preoperative and 2 different postoperative follow-up MRIs. 2 independent measurers performed all radiographic volume measurements. Repeated-measures ANOVA was used to compare mean muscle volume changes over time. Student's t-test was used to compare muscle volumes between groups at specific time intervals. Results. MRIs for 10 DAA and 9 PA patients were analyzed. No significant differences between groups were found in BMI or Age. Pre-operative muscle volume comparisons showed no significant differences. Average postoperative follow-up times were 9.6 and 24.3 weeks. First follow-up showed significant atrophy for the DAA in Gluteus Medius (−7.3%), Gluteus Minimus (−17.5%), and Obturator Internus (−37.3%) muscles. Final follow-up showed significant recovery in Gluteus Medius (+12%) and Minimus (+11.1%) muscles. In the PA, atrophy was significant at first follow-up for Gluteus Minimus (−11.8%), Obturator Internus (−46.8%) and Externus (−16%), Piriformis (−26.5%), and Quadratus Femoris (−30.4%) muscles. Recovery was not seen in any of the significantly atrophied muscles. Muscles with significant quantified fatty atrophy at final follow-up were Obturator Internus [+5.51% (DAA); +7.65% (PA)] and Obturator Externus [+5.55% (PA)]. 3/9 PA patients demonstrated abductor tendinosis, while no DAA patients demonstrated tendinosis. Discussion. Significant atrophy for each group was seen more commonly in the anatomic regions disturbed by each approach respectively. In both approaches, muscles surgically released from their insertion showed greater atrophy, and incomplete recovery