Aims. Proper preoperative planning benefits fracture reduction, fixation, and stability in tibial plateau fracture surgery. We developed and clinically implemented a novel workflow for 3D surgical planning including patient-specific drilling guides in tibial plateau fracture surgery. Methods. A prospective feasibility study was performed in which consecutive tibial plateau fracture patients were treated with 3D surgical planning, including patient-specific drilling guides applied to standard off-the-shelf plates. A postoperative CT scan was obtained to assess whether the screw directions, screw lengths, and plate position were performed according the preoperative planning. Quality of the fracture reduction was assessed by measuring residual intra-articular incongruence (maximum gap and step-off) and compared to a historical matched control group. Results. A total of 15 patients were treated with 3D surgical planning in which 83 screws were placed by using drilling guides. The median deviation of the achieved screw trajectory from the planned trajectory was 3.4° (interquartile range (IQR) 2.5 to 5.4) and the difference in entry points (i.e. plate position) was 3.0 mm (IQR 2.0 to 5.5) compared to the 3D preoperative planning. The length of 72 screws (86.7%) were according to the planning. Compared to the historical cohort, 3D-guided surgery showed an improved surgical reduction in terms of median gap (3.1 vs 4.7 mm; p = 0.126) and step-off (2.9 vs 4.0 mm; p = 0.026). Conclusion. The use of 3D surgical planning including drilling guides was feasible, and facilitated accurate screw directions, screw lengths, and plate positioning. Moreover, the personalized approach improved fracture reduction as compared to a historical cohort. Cite this article: Bone Jt Open 2024;5(1):46–52

Increasing the accuracy of information provided through X-Rays maximises pre-operative planning. Aim of this project is to determine the necessity of calibration probes that would improve the accuracy of pre-operative templating. This is a retrospective study involving leg length and pelvis X-Rays performed across the NHS Lanarkshire from 01/03/2023 until 31/04/2024. A total of 87 leg length X-Rays were identified, 18 had a calibration probe present. Leg length was measured on each and the X-Rays were calibrated against the existing probe. In 66.7% of cases there was a major leg length discrepancy of over 2cm between the pre-calibrated and post-calibrated X-Rays. Pelvic X-Rays of 80 patients that underwent total hip replacement were reviewed. Preoperative templating was compared to the implants inserted. An average of 1.94 discrepancy in the size of the acetabular implant was identified whilst in 30 cases the size of the femoral stem was incorrect by at least 1 size. Magnification of 119.7% on X-Rays was found to provide the most accurate templating. Seventy seven cases of pelvic X-Rays before and after hip hemiarthroplasty were also reviewed. The implant head was templated incorrectly in 74% of cases and the stem in 51%. It was identified that pelvic X-Ray magnification of 121.7% would provide the most accurate results. X-Rays with no calibration probes provide inaccurate measurements leading to faulty preoperative planning. Standardised use of a calibration sphere is strongly suggested and whenever that is not available, we suggest magnification of 121%

PURPOSE. Osteochondral talar defects (OCDs) are sometimes located so far posteriorly that they may not be accessible by anterior arthroscopy, even with the ankle joint in full plantar flexion, because the talar dome is covered by the tibial plafond. It was hypothesized that computed tomography (CT) of the ankle in full plantar flexion could be useful for preoperative planning. The dual purpose of this study was, firstly, to test whether CT of the ankle joint in full plantar flexion is a reliable tool for the preoperative planning of anterior ankle arthroscopy for OCDs, and, secondly, to determine the area of the talar dome that can be reached by anterior ankle arthroscopy. METHODS. In this prospective study, CT-scans with sagittal reconstructions were made of 46 consecutive patients with their affected ankle in full plantar flexion. In the first 20, the distance between the anterior border of the OCD and the anterior tibial plafond was measured both on the scans and during anterior ankle arthroscopy as the gold standard. Intra- and interobserver reliability of CT as well as agreement between CT and arthroscopy were assessed by intraclass correlation coefficients (ICCs) and a Bland and Altman graph. Next, the anterior and posterior borders of the talar dome as well as the anterior tibial plafond were marked on all 46 scans. Using a specially written computer routine, the anterior proportion of the talar dome not covered by the tibial plafond was calculated, both lateral and medial, indicating the accessible area. RESULTS. The distance between the anterior border of the OCD and the anterior tibial plafond ranged from −3.1 to 9.1 mm on CT and from −3.0 to 8.5 on arthroscopy. The intra- and interobserver reliability of the measurements made on CT-scans were excellent (ICC > 0.99, p < 0.001). Likewise, agreement between CT and arthroscopy was excellent (ICC=0.97; p < 0.001); only one patient showed a difference of more than 2.0 mm. The anterior 47.3 ± 6.8% (95%CI, 45.2–49.3) of the lateral talar dome, and 47.7 ± 7.0% (95%CI, 45.7–49.8) of the medial talar dome was not covered by the tibial plafond. CONCLUSIONS. Computed tomography of the ankle joint in full plantar flexion is an accurate preoperative planning method to determine the arthroscopic approach for treatment of OCDs of the talus. Almost half of the talar dome is directly accessible by anterior ankle arthroscopy

Aims

To investigate if preoperative CT improves detection of unstable trochanteric hip fractures.

Introduction. Distraction histogenesis is utilised for cosmetic reasons in patients with constitutional short stature, achondroplasias, or height dysphoria. One of the considerations of patients and surgeons alike, is the preservation of aesthetically acceptable body proportions after the lengthening i.e which segment of the lower limb to lengthen and by how much, in order to preserve the patient's proportions within -or as close as possible to- the normal range of human body proportions. Sound anthropometric data on the normal range of the human body proportions is currently lacking. The aim of this study is to calculate the normal range of the ratio between the lengths of the lower limb, upper limb, femur, tibia, stature and trunk. Methods. Data form standardized measurements of the lengths of the tibia, femur, arm, stature, lower limb, upper limb was obtained from a sample population of 6068 healthy men and women servicing in the US Army. The mean, median, range and standard deviation were calculated for the following ratios of lengths: whole lower limb/leg, Stature/leg, Whole lower limb/thigh, Stature/thigh, Siting height/whole lower limb, Stature/Whole lower limb, Arm Span/Stature, Whole upper limb/Whole lower limb. Results. The ratios show normal distribution. Results are presented separately for men and women for the total sample population and for subgroups based on ethnic origin (White, Black, Hispanic and Asian). Discussion. This study is one of the first to provide specific anthropometric data from a large sample population relevant to the evidence-based preoperative planning and patient counselling before cosmetic limb lengthening procedures

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The aim of the present study was to assess the outcomes of the induced membrane technique (IMT) for the management of infected segmental bone defects, and to analyze predictive factors associated with unfavourable outcomes.

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The aim of this study was to describe services available to patients with periprosthetic femoral fracture (PPFF) in England and Wales, with focus on variation between centres and areas for care improvement.

Background:. Acute deformity correction with the help of osteotomies and stabilisation with intramedullary (IM) nail is a recognised technique. We present our case series of long bong deformity correction using an innovative technique that aids accurate correction after osteotomy and insertion of IM nail. Technique:. On preoperative measurements the distance of the joint surface from the point of intersection of the joint orientation angle with the convex cortex and also its distance from apex of deformity were noted. These distances were reproduced intraoperatively and guide pin was inserted towards premeasured point in the convex cortex. Osteotomy was performed and appropriate sized locked IM nail inserted with the help of temporary blocking screws, resulting in the correction of deformities. Method:. Retrospective review of case notes and radiographs was performed of five patients who underwent long bone deformity correction using this technique. Average age of patients was 15.2yrs. Underlying diagnosis were hypophosphataemic rickets, growth arrests and juvenile osteoporosis. Results:. Length of follow up was from 6 to 24 months. All osteotomies had healed at an average of 46 days. Of the eleven bone segments, nine had normal alignment (within 2.5° of normal or contralateral side). In the other two bone segments the alignment was between 2.5° and 5°. Blocking screws were not used in both these cases. Conclusions:. This is a simple technique of deformity correction. Keys to improve accuracy of correction are preoperative planning, intraoperative blocking screws and oblique osteotomies to accommodate translation

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Postoperative malalignment of the femur is one of the main complications in distal femur fractures. Few papers have investigated the impact of intraoperative malalignment on postoperative function and bone healing outcomes. The aim of this study was to investigate how intraoperative fracture malalignment affects postoperative bone healing and functional outcomes.

Introduction. The treatment of trochanteric femoral fractures with the use of short femoral nails has become an established method. The fixation is required that lag screw be centered to prevent complications. But correct positioning of the device may difficult because of anatomical feature. This study evaluated the femoral morphology three-dimensionally using computed tomography (CT) images. Methods. Seventy eight patients (mean age 75)who underwent total knee arthroplasty were included. After three-dimensional reconstruction of the CT images, the anterior deviation from the femoral neck axis to proximal shaft axis was measured. The proximal shaft axis was defined as a line between center of the cross-section underneath the lesser trochanter and the center of diaphysis. The connection of center in narrow section of the neck and femoral head center was defined as neck axis. Results. The femoral neck axis and shaft axis were not coplanar. The anterior deviation of the axes was 7.5 mm (1.7 to 18.4 mm). The neck-shaft angle was 124° (110–142°). Discussion. Our results indicate that the nail and screw could not be center in current nail system, because of the non-crossing of the femoral axes. The large variation of neck-shaft angle would lead error in preoperative planning using traditional 2-D template system. Our study suggests needs for three-dimensional template system and newly femoral nail device

The accuracy of templates used for the preoperative planning of the fixation of intramedullary fractures depends on radiological magnification. To study the accuracy of these templates, we randomly selected 100 femoral and 100 tibial radiographs taken after stabilisation by an intramedullary nail using a standard technique. We then compared the known nail length with the corresponding measurements on the radiographs. The mean magnification factor for the femur was 9% and for the tibia 7%; these differ considerably from the range of magnification of the manufacturers’ templates (femur, 15% to 17%; tibia 10% to 15%). We conclude that templates are unreliable for the selection of implant length and that this should be done by intraoperative measurements

We treated 17 knees in 15 patients with severe ligament derangement and dislocation by open repair and reconstruction. We assessed the competence of all structures thought to be important for stability by clinical examination, MRI interpretation, and surgery. Our findings showed that in these polytrauma patients clinical examination was not an accurate predictor of the extent or site of soft-tissue injury (53% to 82% correct) due mainly to the limitations of associated injuries. MRI was more accurate (85% to 100% correct) except for a negative result for the lateral collateral ligament and posterolateral capsule. The detail and reliability of MRI are invaluable in the preoperative planning of the surgical repair and reconstruction of dislocated knees

Background. For the treatment of proximal humeral fractures two major therapeutic principles can be employed: Intramedullary nailing (PHN) or locking plate osteosynthesis. Aim of this study was to evaluate and compare clinical and radiological long-term outcome of proximal humeral fracture stabilization using PHN or angular stable plating. In addition, we discussed advantages and disadvantages of both techniques and aimed at establishing criteria which operative technique should preferentially be utilized for selected fracture configurations. Materials and Methods. In a prospective study between 2003 and 2010 we analyzed 72 patients with proximal humeral fracture who had been treated by PHN (44 patients) or angular stable plating (28 patients) in a European Level 1 Trauma Center. In the two cohort groups the following epidemiologic data was found. 46 patients were women, and 26 men with a mean age of 60.6 years (range 18–91). Follow-up was performed 38–82 months after accident, on average. Mechanism of injury was fall in 59, motor cycle accident in 4, bike accident in 8 patients, and fall from horse in 1 patient. Duration time between accident and operation was 2.8 days on average. Osteoporosis was previously known in 20 out of all evaluated patients (plate: 7/28; nail: 13/44). Fractures were classified using the Neer classification and Binary description system: There were 35 3-part fractures (PHN: 26; plate: 9) and 37 4-part fractures (PHN: 18; plate: 19), respectively. Functional and radiological outcome was assessed in a range of 38–82 months after trauma using Constant Score. Results. No clinical symptoms after 3 years were observed in 40 patients, whereas in 32 patients clinical symptoms were evaluated related to pain and/or loss of function. Secondary revision after plate fixation had to be performed in 5 out of 28 patients and in 11 out of 44 patients in the PHN group. Functional outcome using the Constant score demonstrated a total score of 72.9 (ipsi-lateral side) vs. 88.4 (contra-lateral side) in all evaluated patients, on average. Complete metal removal was performed in 34 out of 72 patients (PHN: 17; plate: 17). Conclusion. Both i.m. nailing and angular stable plating are adequate treatment options for proximal humeral fractures. No significant differences in outcome between implants regarding fracture healing, nonunion, and infection were found. Locked plating can be utilized for all distal humerus fracture including complex 4-part fractures. I.m. nailing provides favorable intramedullary stability and can be successfully implanted in multi-segmental fractures of the upper extremity. However, both systems require precise preoperative planning and advanced surgical experience. Clinical long-term outcome largely depends on surgical technique and not so much on the choice of implant

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Osteopetrosis (OP) is a rare hereditary disease that causes reduced bone resorption and increased bone density as a result of osteoclastic function defect. Our aim is to review the difficulties, mid-term follow-up results, and literature encountered during the treatment of OP.