Ultrasonography for rotator cuff disease is a cheap and non-invasive investigation. Our study investigates the tendon specific pathologies leading to misinterpretation of ultrasound findings and their implication for the surgical management. On hundred and five consecutive patients who had an ultrasound scan by a single musculoskeletal radiologist and then underwent shoulder arthroscopy by a single shoulder surgeon for rotator cuff pathologies were included. Surpraspinatus Tendon (SST): There was a sensitivity of 90%. The relatively low positive predictive value (76%) and specificity (42.5%) were influenced by a high number of false positives. This was a mixed group of 23 cases, in which ultrasonography had described either a full-thickness (FTT) or partial-thickness (PTT) tear when arthroscopy did not show any evidence for a cuff tear. Seven of these cases were described as FTT with dimensions less than 1 cm and in ten cases the radiologist described a “possible sub-centimetre tear”. Subscapularis Tendon (SSC): There was a specificity of 100%. The poor negative predictive value (78%) and sensitivity (26%) were caused by a high number of false negatives. Further analysis of the 20 “false negative” patients showed four FTT and sixteen PTT. All partial thickness tears involved the superior fibres of the subscapularis tendon. Our results confirm that USG is a reliable investigation in larger full thickness tears, particularly of the superior rotator cuff (SST). The reliability is significantly reduced in sub-centimetre tears and partial thickness tears, particularly of the subscapularis tendon. Associated tendon pathologies like intra-tendinous calcifications and intra-substance tears make an accurate diagnosis even more difficult and add to the tendency to ‘over-diagnose’ tears of the rotator cuff with use of ultrasonography. The shoulder surgeon should be aware of the potential misinterpretation of ultrasonography findings and be prepared to adjust the surgical procedure accordingly

To discover how traumatic anterior shoulder dislocation in the young patient (17–25) is managed by shoulder surgeons in the UK. A comprehensive postal questionnaire was sent to 164 orthopaedic consultants, all members of BESS. Questions were asked about the initial reduction, investigations undertaken, timing of any surgery, preferred stabilization procedure, arthroscopic or open, detail of surgical technique, period of immobilization and rehabilitation programmes instigated in first-time and recur- rent traumatic dislocaters. The response rate was 82% (n=135). The most likely treatment of a young traumatic shoulder dislocation:. It will be reduced under sedation in A& E by the A& E doctor. Apart from x-ray, no investigations will be performed. It will be immobilised for 3 weeks, then given course of physiotherapy. Upon their second dislocation, they will be listed directly for an open Bankart procedure (with capsular shift as indicated) during which subscapularis will be detached and metallic bone anchors used. Following surgery, they will be immobilised for 3 to 4 weeks, before being permitted full range of movement at 2 to 3 months and allowed to return to contact sports at 6 to 12 months. On the other hand, 54% of surgeons indicated they would investigate prior to surgery, 18% said their first choice operation would be arthroscopic stabilisation, the number of dislocations normally permitted before surgery ranged from 1 to more than 4, and the period of immobilisation post operation from nil to 6 weeks. We now know how shoulder surgeons in the UK are treating this common injury. The results reveal that in Britain, we do not have a consistent approach, raising many discussion points. Open stabilisation remains the firm favourite. Does this mean arthroscopic stabilisation is regarded as an experimental procedure?

Aims. The objective of this study was to compare simulated range of motion (ROM) for reverse total shoulder arthroplasty (rTSA) with and without adjustment for scapulothoracic orientation in a global reference system. We hypothesized that values for simulated ROM in preoperative planning software with and without adjustment for scapulothoracic orientation would be significantly different. Methods. A statistical shape model of the entire humerus and scapula was fitted into ten shoulder CT scans randomly selected from 162 patients who underwent rTSA. Six shoulder surgeons independently planned a rTSA in each model using prototype development software with the ability to adjust for scapulothoracic orientation, the starting position of the humerus, as well as kinematic planes in a global reference system simulating previously described posture types A, B, and C. ROM with and without posture adjustment was calculated and compared in all movement planes. Results. All movement planes showed significant differences when comparing protocols with and without adjustment for posture. The largest mean difference was seen in external rotation, being 62° (SD 16°) without adjustment compared to 25° (SD 9°) with posture adjustment (p < 0.001), with the highest mean difference being 49° (SD 15°) in type C. Mean extension was 57° (SD 18°) without adjustment versus 24° (SD 11°) with adjustment (p < 0.001) and the highest mean difference of 47° (SD 18°) in type C. Mean abducted internal rotation was 69° (SD 11°) without adjustment versus 31° (SD 6°) with posture adjustment (p < 0.001), showing the highest mean difference of 51° (SD 11°) in type C. Conclusion. The present study demonstrates that accounting for scapulothoracic orientation has a significant impact on simulated ROM for rTSA in all motion planes, specifically rendering vastly lower values for external rotation, extension, and high internal rotation. The substantial differences observed in this study warrant a critical re-evaluation of all previously published studies that examined component choice and placement for optimized ROM in rTSA using conventional preoperative planning software. Cite this article: Bone Joint J 2024;106-B(11):1284–1292

Aims. To discover how the management of traumatic anterior shoulder dislocation in the young patient (17-25) has changed, if at all, over the past six years. Methods. The same postal questionnaire was sent in 2002 and 2009 to 164 shoulder surgeons. Questions were asked about initial reduction, investigation undertaken, timing of surgery, preferred stabilisation procedure, period of immobilisation and rehabilitation programme instigated in first-time and recurrent traumatic dislocators. Summary of Results. Response rate - 92% (2009), 83% (2002). The most likely management of a young traumatic shoulder dislocation:. Reduction under sedation in A&E by A&E doctor (80%). Apart from X-ray, no investigations are performed (80%). Immobilisation for 3 weeks, followed by physiotherapy (82%). 68% would consider stabilisation surgery for first time dislocators (especially professional sportsmen) compared to 35% (2002). Of them, nearly 90% would perform an arthroscopic stabilisation vs. 57.5% (2002). For recurrent dislocators:. 75% would consider stabilisation after a second dislocation. 85% would investigate prior to surgery, choice of investigation being MR arthrogram (52%), compared to 50% (2002). 77% would perform arthroscopic stabilisation vs. 18% (2002), commonest procedure-arthroscopic Bankart repair using biodegradable bone anchors (62% 2009 vs. 27% in 2002). Immobilisation for 3 weeks, full range of motion 1-2 months and return to contact sports 6 - 12 months. Conclusion. There has been a remarkable change in practice compared to the previous survey. A significant proportion of Orthopaedic Surgeons would consider stabilisation in young first-time dislocators instead of conservative management. Arthroscopic stabilisation is now the preferred technique compared to open stabilisation whenever possible. Surgeons are using more investigations prior to listing the patient for surgery, namely the MR arthrogram. There is also an increased use of bio-degradable anchors as compared to metallic bone anchors in 2002

Clinical examination for shoulder conditions is not perfect. For that reason MRI tends to be accepted as the ‘gold standard’ and operative decisions may be based more on the MRI than the clinical findings. This has led to inappropriate treatment including unnecessary operations.

MRI's are not perfect either. Normal variations and abnormalities in asymptomatic people must be considered.

Clinical examination by a combination of tests can make MRI unnecessary or determine whether MRI abnormalities are relevant. This paper concentrates on rotator cuff tears.

A comprehensive postal questionnaire was sent to 164 orthopaedic consultants, all members of the Brit-ish Elbow and Shoulder Society. Questions were asked about the initial reduction, investigations undertaken, timing of any surgery, preferred stabilization procedure, arthroscopic or open, detail of surgical technique, period of immobilization and rehabilitation programmes instigated in first-time and recurrent traumatic dislocators. The response rate was 83% (n=136)

The most likely treatment of a young traumatic shoulder dislocation:

It will be reduced under sedation in A& E by the A& E doctor.

On the other hand, 54% of surgeons indicated they would investigate prior to surgery, 16% said their first choice operation would be arthroscopic stabilisation, the number of dislocations normally permitted before surgery ranged from 1 to more than 3, and the period of immobilisation post operation from nil to 6 weeks.

The results reveal a wide variation in practice and no clear consensus on how to best manage these patients. Open stabilisation remains the firm favourite. Does this mean arthroscopic stabilisation is regarded as an experimental procedure?

Aims: To discover how the management of traumatic anterior shoulder dislocation in the young patient (17–25) has changed, if at all, over the past six years.

Methods: The same postal questionnaire was used in 2003 and 2009, sent out to 164 members of British Elbow and Shoulder Society. Questions were asked about the initial reduction, investigation undertaken, timing of any surgery, preferred stabilization procedure, arthroscopic or open, detail of surgical technique, period of immobilization and rehabilitation programme instigated in first-time and recurrent traumatic dislocators.

Summary of Results: The response rate were 92% (n=151) – 2009, 83% (n=131) – 2003 The most likely management of a young traumatic shoulder dislocation in the UK would be:

Reduction under sedation in A& E by the A& E doctor (80% of respondents).

Conclusions: There has been a remarkable change in practice compared to the previous survey. A significant proportion of Orthopaedic Surgeons would consider stabilisation in young first time dislocators instead of conservative management. Arthroscopic stabilisation is now the preferred technique compared to open stabilisation whenever possible. Surgeons are using more investigations prior to listing the patient for surgery namely the MR arthrogram. There is also an increased use of bio-degradable anchors as compared to metallic bone anchors in 2003.

Glenoid baseplate orientation in reverse shoulder arthroplasty (RSA) influences clinical outcomes, complications, and failure rates. Novel technologies have been produced to decrease performance heterogeneity of low and high-volume surgeons. This study aimed to determine novice and experienced shoulder surgeon's ability to accurately characterise glenoid component orientation in an intra-operative scenario. Glenoid baseplates were implanted in eight fresh frozen cadavers by novice surgical trainees. Glenoid baseplate version, inclination, augment rotation, and superior-inferior centre of rotation (COR) offset were then measured using in-person visual assessments by novice and experienced shoulder surgeons immediately after implantation. Glenoid orientation parameters were then measured using 3D CT scans with digitally reconstructed radiographs (DRRs) by two independent observers. Bland-Altman plots were produced to determine the accuracy of glenoid orientation using standard intraoperative assessment compared to postoperative 3D CT scan results. Visual assessment of glenoid baseplate orientation showed “poor” to “fair” correlation to 3D CT DRR measurements for both novice and experienced surgeon groups for all measured parameters. There was a clinically relevant, large discrepancy between intra-operative visual assessments and 3D CT DRR measurements for all parameters. Errors in visual assessment of up to 19.2 degrees of inclination and 8mm supero-inferior COR offset occurred. Experienced surgeons had greater measurement error than novices for all measured parameters. Intra-operative measurement errors in glenoid placement may reach unacceptable clinical limits. Kinesthetic input during implantation likely improves orientation understanding and has implications for hands-on learning

The Latarjet procedure is a well described method to stabilize anterior shoulder instability. There are concerns of high complication rates, one of these being a painful shoulder without instability due to screw irritation. The arthroscopic changes in the shoulder at time of screw removal compared to those pre-Latarjet have not been described in the literature. We conducted a retrospective review of arthroscopic videos between 2015 and 2022 of 17 patients at the time of their Latarjet screw removal and where available (n=13) compared them to arthroscopic findings at time of index Latarjet. Instability was an exclusion criterion. X-rays prior to screw removal were assessed independently by two observers blinded to patient details for lysis of the graft. Arthroscopic assessment of the anatomy and pathological changes were made by two shoulder surgeons via mutual consensus. An intraclass correlation coefficient (ICC) was analyzed as a measure for the inter-observer reliability for the radiographs. Our cohort had an average age of 21.5±7.7 years and an average period of 16.2±13.1 months between pre- and post-arthroscopy. At screw removal all patients had an inflamed subscapularis muscle with 88% associated musculotendinous tears and 59% had a pathological posterior labrum. Worsening in the condition of subscapularis muscle (93%), humeral (31%) and glenoid (31%) cartilage was found when compared to pre-Latarjet arthroscopes. Three failures of capsular repair were seen, two of these when only one anchor was used. X-ray review demonstrated 79% of patients had graft lysis. Excellent inter-rater reliability was observed with an ICC value of 0.82. Our results show a high rate of pathological change in the subscapularis muscle, glenoid labrum and articular cartilage in the stable but painful Latarjet. 79% of patients had graft lysis with prominent screws on X-ray

We test the clinical validity and financial implications of the proposed Choosing Wisely statement: “Using ultrasound as a screening test for shoulder instability is inappropriate in people under 30 years of age, unless there is clinical suspicion of a rotator cuff tear.”. A retrospective chart review from a specialist shoulder surgeon's practice over a two-year period recorded 124 patients under the age of 30 referred with shoulder instability. Of these, forty-one had already had ultrasound scans performed prior to specialist review. The scan results and patient files were reviewed to determine the reported findings on the scans and whether these findings were clinically relevant to diagnosis and decision-making. Comparison was made with subsequent MRI scan results. The data, obtained from the Accident Compensation Corporation (ACC), recorded the number of cases and costs incurred for ultrasound scans of the shoulder in patients under 30 years old over a 10-year period. There were no cases where the ultrasound scan was considered useful in decision-making. No patient had a full thickness rotator cuff tear. Thirty-nine of the 41 patients subsequently had MRI scans. The cost to the ACC for funding ultrasound scans in patients under 30 has increased over the last decade and exceeded one million dollars in the 2020/2021 financial year. In addition, patients pay a surcharge for this test. The proposed Choosing Wisely statement is valid. This evidence supports that ultrasound is an unnecessary investigation for patients with shoulder instability unless there is clinical suspicion of a rotator cuff tear. Ultrasound also incurs costs to the insurer (ACC) and the patient. We recommend x-rays and, if further imaging is indicated, High Tech Imaging with MRI and sometimes CT scans in these patients

Glenoid bone grafting in reverse total shoulder arthroplasty (RTSA) has emerged as an effective method of restoring bone stock in the presence of complex glenoid bone loss, yet there is limited published evidence on efficacy. The aim of this study was to conduct an analysis of clinical and radiographic outcomes associated with glenoid bone grafting in primary RTSA. Patients who underwent a primary RTSA with glenoid bone grafting were retrospectively identified from the databases of two senior shoulder surgeons. Inclusion criteria included minimum of 12 months clinical and/or radiographical follow up. Patients underwent preoperative clinical and radiographic assessment. Graft characteristics (source, type, preparation), range of movement (ROM), patient-reported outcome measures (Oxford Shoulder Scores [OSS]), and complications were recorded. Radiographic imaging was used to analyse implant stability, graft incorporation, and notching by two independent reviewers. Between 2013 and 2021, a total of 53 primary RTSA procedures (48 patients) with glenoid bone grafting were identified. Humeral head autograft was used in 51 (96%) of cases. Femoral head allograft was utilised in two cases. Depending on the morphology of glenoid bone loss, a combination of structural (corticocancellous) and non-structural (cancellous) grafts were used to restore glenoid bone stock and the joint line. All grafts were incorporated at review. The mean post-operative OSS was significantly higher than the pre-operative OSS (40 vs. 22, p < 0.001). ROM was significantly improved post-operatively. One patient is being investigated for residual activity-related shoulder pain. This patient also experienced scapular notching resulting in the fracturing of the inferior screw. One patient experienced recurrent dislocations but was not revised. Overall, at short term follow up, glenoid bone grafting was effective in addressing glenoid bone loss with excellent functional and clinical outcomes when used for complex bone loss in primary RTSA. The graft incorporation rate was high, with an associated low complication rate

The diagnosis of infection following shoulder arthroplasty is notoriously difficult. The prevalence of prosthetic shoulder infection after arthroplasty ranges from 3.9 – 15.4% and the most common infective organism is Cutibacterium acnes. Current preoperative diagnostic tests fail to provide a reliable means of diagnosis including WBC, ESR, CRP and joint aspiration. Fluoroscopic-guided percutaneous synovial biopsy (PSB) has previously been reported in the context of a pilot study and demonstrated promising results. The purpose of this study was to determine the diagnostic accuracy of percutaneous synovial biopsy compared with open culture results (gold standard). This was a multicenter prospective cohort study involving four sites and 98 patients who underwent revision shoulder arthroplasty. The cohort was 60% female with a mean age was 65 years (range 36-83 years). Enrollment occurred between June 2014 and November 2021. Pre-operative fluoroscopy-guided synovial biopsies were carried out by musculoskeletal radiologists prior to revision surgery. A minimum of five synovial capsular tissue biopsies were obtained from five separate regions in the shoulder. Revision shoulder arthroplasty was performed by fellowship-trained shoulder surgeons. Intraoperative tissue samples were taken from five regions of the joint capsule during revision surgery. Of 98 patients who underwent revision surgery, 71 patients underwent both the synovial biopsy and open biopsy at time of revision surgery. Nineteen percent had positive infection based on PSB, and 22% had confirmed culture positive infections based on intra-operative tissue sampling. The diagnostic accuracy of PSB compared with open biopsy results were as follows: sensitivity 0.37 (95%CI 0.13-0.61), specificity 0.81 (95%CI 0.7-0.91), positive predictive value 0.37 (95%CI 0.13 – 0.61), negative predictive value 0.81 (95%CI 0.70-0.91), positive likelihood ratio 1.98 and negative likelihood ratio 0.77. A patient with a positive pre-operative PSB undergoing revision surgery had an 37% probability of having true positive infection. A patient with a negative pre-operative PSB has an 81% chance of being infection-free. PSB appears to be of value mainly in ruling out the presence of peri-prosthetic infection. However, poor likelihood ratios suggest that other ancillary tests are required in the pre-operative workup of the potentially infected patient

Glenoid and humeral head bone defects have long been recognized as major determinants in recurrent shoulder instability as well as main predictors of outcomes after surgical stabilization. However, a universally accepted method to quantify them is not available yet. The purpose of the present study is to describe a new CT method to quantify bipolar bone defects volume on a virtually generated 3D model and to evaluate its reproducibility. A cross-sectional observational study has been conducted. Forty CT scans of both shoulders were randomly selected from a series of exams previously acquired on patients affected by anterior shoulder instability. Inclusion criterion was unilateral anterior shoulder instability with at least one episode of dislocation. Exclusion criteria were: bilateral shoulder instability; posterior or multidirectional instability, previous fractures and/or surgery to both shoulders; congenital or acquired inflammatory, neurological, or degenerative diseases. For all patients, CT exams of both shoulders were acquired at the same time following a standardized imaging protocol. The CT data sets were analysed on a standard desktop PC using the software 3D Slicer. Computer-based reconstruction of the Hill-Sachs and glenoid bone defect were performed through Boolean subtraction of the affected side from the contralateral one, resulting in a virtually generated bone fragment accurately fitting the defect. The volume of the bone fragments was then calculated. All measurements were conducted by two fellowship-trained orthopaedic shoulder surgeons. Each measurement was performed twice by one observer to assess intra-observer reliability. Inter and intra-observer reliability were calculated. Intraclass Correlation Coefficients (ICC) were calculated using a two-way random effect model and evaluation of absolute agreement. Confidence intervals (CI) were calculated at 95% confidence level for reliability coefficients. Reliability values range from 0 (no agreement) to 1 (maximum agreement). The study included 34 males and 6 females. Mean age (+ SD) of patients was 36.7 + 10.10 years (range: 25 – 73 years). A bipolar bone defect was observed in all cases. Reliability of humeral head bone fragment measurements showed excellent intra-observer agreement (ICC: 0.92, CI 95%: 0.85 – 0.96) and very good interobserver agreement (ICC: 0.89, CI 95%: 0.80 – 0.94). Similarly, glenoid bone loss measurement resulted in excellent intra-observer reliability (ICC: 0.92, CI 95%: 0.85 – 0.96) and very good inter-observer agreement (ICC: 0.84, CI 95%:0.72 – 0.91). In conclusion, matching affected and intact contralateral humeral head and glenoid by reconstruction on a computer-based virtual model allows identification of bipolar bone defects and enables quantitative determination of bone loss

INTRODUCTION. Determining proper joint tension in reverse total shoulder arthroplasty (rTSA) can be a challenging task for shoulder surgeons. Often, this is a subjective metric learned by feel during fellowship training with no real quantitative measures of what proper tension encompasses. Tension too high can potentially lead to scapular stress fractures and limitation of range of motion (ROM), whereas tension too low may lead to instability. New technologies that detect joint load intraoperatively create the opportunity to observe rTSA joint reaction forces in a clinical setting for the first time. The purpose of this study was to observe the differences in rTSA loads in cases that utilized two different humeral liner sizes. METHODS. Ten different surgeons performed a total of 37 rTSA cases with the same implant system. During the procedure, each surgeon reconstructed the rTSA implants to his or her own preferred tension. A wireless load sensing humeral liner trial (VERASENSE for Equinoxe, OrthoSensor, Dania Beach, FL) was used in lieu of a traditional plastic humeral liner trial to provide real-time load data to the operating surgeon during the procedure. Two humeral liner trial sizes were offered in 38mm and 42mm curvatures and were selected each case based on surgeon preference. To ensure consistent measurements between surgeons, a standardized ROM assessment consisting of four dynamic maneuvers (maximum internal to external rotation at 0°, 45°, and 90° of abduction, and a maximum flexion/extension maneuver) and three static maneuvers (arm overhead, across the body, and behind the back) was completed in each case. Deidentified load data in lbf was collected and sorted based on which size liner was selected. Differences in means for minimum and maximum load values for the four dynamic maneuvers and differences in means for the three static maneuvers were calculated using 2-tailed unpaired t-tests. RESULTS. No significant differences were observed for the flexion/extension maneuver between the 38mm and 42mm liner sizes, but a significant difference was observed for every internal/external rotation assessment at 0°, 45°, and 90° of abduction. No significant differences were observed for the across the body and overhead maneuvers, but a significant difference was observed for the behind the back maneuver (p = 0.015). Standard deviations were pronounced across all maneuvers. CONCLUSION. This study observed significant differences in intraoperative load values in rTSA when comparing different humeral liner sizes. Limitations of this study include the small sample sizes and large standard deviations observed, as well as comparing across multiple patients and multiple surgeons. Area for future work includes comparing load values with postoperative functional results and complication risks for short, midterm, and long-term outcomes in efforts to find the optimal load range for a given patient

An Extended Scope Practitoner Physiotherapist (ESP) developed a problem shoulder clinic to support the physiotherapy management of patients with shoulder pathology across one healthcare trust. The impact of the clinic on the management of patients and their onward referral to a shoulder surgeon was evaluated. Physiotherapists had access to a problem shoulder clinic that was managed by an ESP with a special interest in shoulders. The clinic provided assessment and advice on the management of patients with shoulder pathology who were receiving physiotherapy treatment. Throughout a three-year period the opinion of the ESP was sought on 256 patients. 69 patients were seen in a face-to-face consultation, the remainder were diuscussed with their treating physiotherapist and advice was offered. 211 patients were managed and discharged through the physiotherapy service. The ESP referred 45 patients to the shoulder surgeon, of which 53% underwent surgery; 20% are awaiting investigations, 22% were managed with injection therapy and five per cent were discharged. The problem shoulder clinic was shown to be a valuable addition to the clinical mentoring system in physiotherapy. It proved to be an important gate-keeping mechanism between physiotherapy and consultant care as 82% of patients referred to the clinic were managed within physiotherapy. The clinic also proved to be an effective means of identifying patients requiring surgery. Of those that were referred to the shoulder surgeon only five per cent were discharged with no further intervention. A planned development as a consequence of this evaluation is a physiotherapy advocate for shoulders for each outlying hospital within the trust. The aim of this will be to strengthen communication links between the shoulder surgeon and physiotherapy departments over a wide geographic area and to facilitate prompt identification of patients in need of referral to the shoulder surgeon

During shoulder arthroplasty the native functionality of the diseased shoulder joint is restored, this functionality is strongly dependent upon the native anatomy of the pre-diseased shoulder joint. Therefore, surgeons often use the healthy contralateral scapula to plan the surgery, however in bilateral diseases such as osteoarthritis this is not always feasible. Virtual reconstructions are then used to reconstruct the pre-diseased anatomy and plan surgery or subject-specific implants. In this project, we develop and validate a statistical shape modeling method to reconstruct the pre-diseased anatomy of eroded scapulae with the aim to investigate the existence of predisposing anatomy for certain shoulder conditions. The training dataset for the statistical shape model consisted of 110 CT images from patients without observable scapulae pathologies as judged by an experienced shoulder surgeon. 3D scapulae models were constructed from the segmented images. An open-source non-rigid B-spline-based registration algorithm was used to obtain point-to-point correspondences between the models. The statistical shape model was then constructed from the dataset using principle component analysis. The cross-validation was performed similarly to the procedure described by Plessers et al. Virtual defects were created on each of the training set models, which closely resemble the morphology of glenoid defects according to the Wallace classification method. The statistical shape model was reconstructed using the leave-one-out method, so the corresponding training set model is no longer incorporated in the shape model. Scapula reconstruction was performed using a Monte Carlo Markov chain algorithm, random walk proposals included both shape and pose parameters, the closest fitting proposal was selected for the virtual reconstruction. Automatic 3D measurements were performed on both the training and reconstructed 3D models, including glenoid version, critical shoulder angle, glenoid offset and glenoid center position. The root-mean-square error between the measurements of the training data and reconstructed models was calculated for the different severities of glenoid defects. For the least severe defect, the mean error on the inclination, version and critical shoulder angle (°) was 2.22 (± 1.60 SD), 2.59 (± 1.86 SD) and 1.92 (± 1.44 SD) respectively. The reconstructed models predicted the native glenoid offset and centre position (mm) an accuracy of 0.87 (± 0.96 SD) and 0.88 (± 0.57 SD) respectively. The overall reconstruction error was 0.71 mm for the reconstructed part. For larger defects each error measurement increased significantly. A virtual reconstruction methodology was developed which can predict glenoid parameters with high accuracy. This tool will be used in the planning of shoulder surgeries and investigation of predisposing scapular morphologies

The standard of reference by which many imaging studies and clinical tests are often measured is arthroscopy. However, the inter-rater reliability of a surgeon’s arthroscopic diagnosis a relatively unexplored area of investigation. The purpose of the study was to determine the inter-rater reliability among a group of experienced orthopaedic shoulder surgeons in evaluating the intra-articular structures involved in a real-time diagnostic shoulder arthroscopy using a videotape model. Given the conditions of this study, the agreement among experienced shoulder surgeons was structure dependent ranging from poor to very good and was influenced by the prevalence of pathology. To determine the inter-rater reliability among a group of experienced orthopaedic shoulder surgeons in evaluating the intra-articular structures involved in a real-time diagnostic shoulder arthroscopy using a videotape model. In this patient population, the agreement among experienced shoulder surgeons was structure dependent ranging from poor to very good and was influenced by the prevalence of pathology. For educational, research and legal reasons, it is important to objectively demonstrate that intra-operative findings can be reproduced. To date, this is a relatively unexplored area of investigation within shoulder arthroscopy. The video-review surgeon median overall agreements were as follows: anterior labrum=90%, inferior labrum=45%, superior labrum=60%, posterior labrum=65%, superior glenohumeral ligament(GHL)=50%, middleGHL=50%, anterior-inferiorGHL=25%, glenoid surface=35%, detection of Hill Sachs lesion=85%, biceps tendon=70%, supraspinatus tendon=85%, infraspinatus tendon=70%, subscapularis tendon=80%. Twenty patients (nineteen males, one female) diagnosed with recurrent anterior shoulder instability with an average age of 27.9 years (15–44years) consented to participate. One experienced surgeon performed a standardized diagnostic shoulder arthroscopy following a modified Snyder 15-point protocol. All surgeries were videotaped. The operative protocol, clarity of videotape information and data collection forms were pre-tested to ensure accuracy. The patients’ clinical information, x-rays and videotaped arthroscopy were sent to six experienced shoulder surgeons. The surgeons reviewed the clinical information, assessed the intra-articular structures shown on the videotape and recorded their diagnoses on a standardized data collection form. The primary outcome was the median overall percent agreement for the video-review surgeons. This was calculated for each structure evaluated

Pre-operative 3D glenoid planning improves component placement in terms of version, inclination, offset and orientation. Version and inclination measurements require the position of the inferior angle. As a consequence, current planning tools require a 3D model of the full scapula to accurately determine the glenoid parameters. Statistical shape models (SSMs) can be used to reconstruct the missing anatomy of bones. Therefore, the objective of this study is to develop and validate an SSM for the reconstruction of the inferior scapula, hereby reducing the irradiation exposure for patients. The training dataset for the statistical shape consisted of 110 CT images from patients without observable scapulae pathologies as judged by an experienced shoulder surgeon. 3D scapulae models were constructed from the segmented images. An open-source non-rigid B-spline-based registration algorithm was used to obtain point-to-point correspondences between the models. A statistical shape model was then constructed from the dataset using principal component analysis. Leave-one-out cross-validation was performed to evaluate the accuracy of the predicted glenoid parameters from virtual partial scans. Five types of virtual partial scans were created on each of the training set models, where an increasing amount of scapular body was removed to mimic a partial CT scan. The statistical shape model was reconstructed using the leave-one-out method, so the corresponding training set model is no longer incorporated in the shape model. Reconstruction was performed using a Monte Carlo Markov chain algorithm, random walk proposals included both shape and pose parameters, the closest fitting proposal was selected for the virtual reconstruction. Automatic 3D measurements were performed on both the training and reconstructed 3D models, including glenoid version, inclination, glenoid centre point position and glenoid offset. In terms of inclination and version we found a mean absolute difference between the complete model and the different virtual partial scan models of 0.5° (SD 0.4°). The maximum difference between models was 3° for inclination and 2° for version. For offset and centre point position the mean absolute difference was 0 mm with an absolute maximum of 1 mm. The magnitude of the mean and maximum differences for all anatomic measurements between the partial scan and complete models is smaller than the current surgical accuracy. Considering these findings, we believe a SSM based reconstruction technique can be used to accurately reconstruct the glenoid parameters from partial CT scans

Objectives. To explore whether orthopaedic surgeons have adopted the Proximal Fracture of the Humerus: Evaluation by Randomisation (PROFHER) trial results routinely into clinical practice. Methods. A questionnaire was piloted with six orthopaedic surgeons using a ‘think aloud’ process. The final questionnaire contained 29 items and was distributed online to surgeon members of the British Orthopaedic Association and British Elbow and Shoulder Society. Descriptive statistics summarised the sample characteristics and fracture treatment of respondents overall, and grouped them by whether they changed practice based on PROFHER trial findings. Free-text responses were analysed qualitatively for emerging themes using Framework Analysis principles. Results. There were complete responses from 265 orthopaedic and trauma surgeons who treat patients with proximal humeral fractures. Around half (137) had changed practice to various extents because of PROFHER, by operating on fewer PROFHER-eligible fractures. A third (43) of the 128 respondents who had not changed practice were already managing patients non-operatively. Those who changed practice were more likely to be younger, work in a trauma unit rather than a major trauma centre, be specialist shoulder surgeons and treat fewer PROFHER-eligible fractures surgically. This group gave higher scores when assessing validity and applicability of PROFHER. In contrast, a quarter of the non-changers were critical, sometimes emphatically, of PROFHER. The strongest theme that emerged overall was the endorsement of evidence-based practice. Conclusion. PROFHER has had an impact on surgeons’ clinical practice, both through changing it, and through underpinning existing non-operative practice. Although some respondents expressed reservations about the trial, evidence from such trials was found to be the most important influence on surgeons’ decisions to change practice. Cite this article: L. Jefferson, S. Brealey, H. Handoll, A. Keding, L. Kottam, I. Sbizzera, A. Rangan. Impact of the PROFHER trial findings on surgeons’ clinical practice: An online questionnaire survey. Bone Joint Res 2017;6:590–599. DOI: 10.1302/2046-3758.610.BJR-2017-0170

Background. Degeneration of the shoulder joint is a frequent problem. There are two main types of shoulder degeneration: Osteoarthritis and cuff tear arthropathy (CTA) which is characterized by a large rotator cuff tear and progressive articular damage. It is largely unknown why only some patients with large rotator cuff tears develop CTA. In this project, we investigated CT data from ‘healthy’ persons and patients with CTA with the help of 3D imaging technology and statistical shape models (SSM). We tried to define a native scapular anatomy that predesignate patients to develop CTA. Methods. Statistical shape modeling and reconstruction:. A collection of 110 CT images from patients without glenohumeral arthropathy or large cuff tears was segmented and meshed uniformly to construct a SSM. Point-to-point correspondence between the shapes in the dataset was obtained using non-rigid template registration. Principal component analysis was used to obtain the mean shape and shape variation of the scapula model. Bias towards the template shape was minimized by repeating the non-rigid template registration with the resulting mean shape of the first iteration. Eighty-six CT images from patients with different severities of CTA were analyzed by an experienced shoulder surgeon and classified. CT images were segmented and inspected for signs of glenoid erosion. Remaining healthy parts of the eroded scapulae were partitioned and used as input of the iterative reconstruction algorithm. During an iteration of this algorithm, 30 shape components of the shape model are optimized and the reconstructed shape is aligned with the healthy parts. The algorithm stops when convergence is reached. Measurements. Automatic 3D measurements were performed for both the healthy and reconstructed shapes, including glenoid version, inclination, offset and critical shoulder angle. These measurements were manually performed on the mean shape of the shape model by a surgeon, after which the point-to-point correspondence was used to transfer the measurements to each shape. Results. The critical shoulder angle was found to be significantly larger for the CTA scapulae compared to the references (P<0.01). When analyzing the classified scapulae significant differences were found for the version angle in the scapulae of group 4a/4b and the critical shoulder angle of group 3 when compared to the references (P<0.05). Conclusion. Patients with CTA have a larger critical shoulder angle compared with reference patients. Some significant differences are found between the scapulae from patients in different stages of CTA and healthy references, however the differences are smaller than the accuracy of the SSM reconstruction. Therefore, we are unable to conclude that there is a predisposing anatomy in terms of glenoid version, inclination or offset for CTA