Poor clinical outcomes and high rates of dislocation after modular reverse shoulder arthroplasty for proximal humeral oncologic resection.

PURPOSE: The shoulder is the most common site for upper extremity tumors. The aim of the study was to analyze the outcomes and the complications of modular reverse shoulder arthroplasty (RSA) after proximal humerus resection. METHODS: We retrospectively included 15 consecutive patients who underwent a modular MUTARS™ RSA reconstruction after proximal humerus tumour resection between 2017 and 2020. The mean age was 52 years. Their clinical outcomes were assessed using the Constant-Murley score and the MSTS shoulder. Radiological outcomes were assessed based on the presence of loosening, osteolysis, and scapular notching. Complications such as dislocation, oncological recurrence, and infection were assessed. Mean follow-up time was 32.9 months (24 to 45). RESULTS: The mean adjusted Constant score was 50.7% (min 22, max 81), and the mean MSTS score was 15.6 (min 4, max 26). We had no loosening, osteolysis, or scapular notching on the radiographs at last follow-up. We had a high complication rate of 53%: one infection, one oncological recurrence, and six dislocations (40%), of which five were re-operated. CONCLUSION: In our experience, the MUTARS™ Implantcast™ modular RSA has poor functional results and a high rate of dislocation in the case of large proximal humerus resections below the distal insertion of the deltoid.

Limb schwannoma: Factors for postoperative neurologic deficit and poor functional results.

INTRODUCTION: Neurologic complications after limb schwannoma resection are not unusual, but there is no consensus on risk factors for neurologic deficit or poor functional results. We therefore conducted a retrospective study, to screen for factors predicting, firstly, postoperative neurologic deficit and, secondly, poor functional results. HYPOTHESIS: Certain pre- and intraoperative features predict risk of failure, poor results or aggravation. PATIENTS AND METHODS: A single-center retrospective study was conducted in the University Hospital of Lille, France, for the period January 2004 to March 2020, including 71 patients. Preoperative variables (gender, age, symptoms, progression, tumor location and size) and operative data (type of surgery) were collected as possible risk factors for postoperative sensory deficit (Weber) and/or motor deficit [Medical Research Council (MRC)] and poor functional result [Quick Disabilities of the Arm, Shoulder and Hand (QuickDASH); Lower Extremity Functional Scale (LEFS) and douleur neuropathique (neuropathic pain) 4 (DN4)]. RESULTS: Results were assessed a mean 69.4±38.5 months' follow-up (range, 6-180 months). In total, 21 patients (29.6%) had deficits (21 sensory, 1 motor) preoperatively and 25 patients (35.2%) postoperatively (20 sensory, 9 motor) (p=0.689). Fourteen patients (19.7%) showed functional aggravation. Fascicular resection was associated with risk of postoperative deficit [OR = 4.65 (95% CI: 1.485-15.543); p=0.004] and functional deterioration [OR = 3.9 (95% CI: 1.143-13.311); p=0.042]. Thirteen patients (18.3%) showed no improvement on DN4. Preoperative pain was a factor for improvement on DN4 [OR = 3.667 (95% CI: 1.055-12.738); p=0.0409]. DISCUSSION: The study identified fascicular resection as a risk factor for postoperative deficit and functional deterioration after limb schwannoma resection. Patients with preoperative neuropathic pain showed alleviation. Resection should be precise, under magnification, avoiding fascicular resection. Preoperative patient information is essential. LEVEL OF EVIDENCE: IV; retrospective series.

Accuracy of the GeneXpert® MRSA/SA SSTI test to diagnose methicillin-resistant Staphylococcus spp. infection in bone fixation and fusion and management of infected non-unions.

INTRODUCTION: The GeneXpert® MRSA/SA SSTI (Methicillin Resistant Staphylococcus aureus / S. aureus skin and soft tissue infection) PCR test allows early detection of methicillin resistance in staphylococci. This test was developed for skin infections and has been evaluated for prosthetic joint infections but, to our knowledge, has not been evaluated for hardware infections outside of arthroplasties. Furthermore, we conducted a retrospective study in patients with non-prosthetic osteosynthesis hardware aiming: 1) to identify the diagnostic values of the PCR test compared to conventional cultures and the resulting rate of appropriate antibiotic therapy. 2) to identify the rate of false negative (FN) results, 3) to identify and compare the rates of failure of infectious treatment (FN versus others) 4) to search for risk factors for FN of the PCR test. HYPOTHESIS: The PCR test allowed early and appropriate targeting of antibiotic therapy. MATERIAL AND METHODS: The results of PCR tests and conventional cultures for osteoarticular infections of non-prosthetic hardware over four years (2012-2016) were compared to identify the diagnostic values of using the results of conventional culture as a reference and the rate of appropriate antibiotic therapies. Infectious management failures between the results of the FN group and the others were compared, and variables associated with a FN of the PCR test were identified. RESULTS: The analysis of 419 PCR tests allowed us to establish a sensitivity of 42.86%, a specificity of 96.82%, a positive predictive value of 60% and a negative predictive value of 93.83%. Using the results of the PCR test for the targeting of postoperative antibiotic therapy, it was suitable for staphylococcal coverage in 90.94% (381/419). The rates of patients for whom infectious treatment failed were not significantly different between the FN group and the other patients (20.8% versus 17.7%, respectively; Hazard Ratio = 1.12 (95%CI 0.47-2.69, p = 0.79)). A skin opening during the initial trauma (p = 0.005) and a polymicrobial infection were significantly associated with a risk of FN from the PCR test (p < 0.001). CONCLUSION: The PCR test makes it possible to reduce the duration of empirical broad-spectrum antibiotic therapy during the treatment of an infection of osteosynthesis hardware but causes a lack of antibiotic coverage in 9.06% of cases. LEVEL OF EVIDENCE: III; Diagnostic case control study.

Return to sport after surgery for osteochondral lesions of the talar dome. Results of a multicenter prospective study on 58 patients.

INTRODUCTION: Osteochondral lesions of the talar dome (OLTD) are most often found in patients for whom the return to sports activities is the main issue. Two types of surgery have been distinguished at present, bone marrow stimulation techniques and mosaicplasty techniques. The size of the lesion indicating the need for bone marrow stimulation as the required surgical procedure has recently been decreased (<1cm). The main objective of this study was therefore to evaluate the return to sport after OLTD surgery. Our hypothesis is that surgery of osteochondral lesions of the talar dome allows the resumption of sports activities in the majority of cases. MATERIAL AND METHODS: This multicenter prospective study was conducted across 10 French centers specializing in foot and ankle surgery. All patients aged 18 to 65 with symptomatic OLTD resistant to thorough medical treatment for at least 6 months, justifying surgery, were included from June 2018 to September 2019. In addition to the usual demographic data, the practice of sport and level (professional, competitive, leisure) were systematically investigated preoperatively. A common protocol for surgical management and postoperative follow-up had previously been established according to the arthrographic stage of the lesion. The most recent recommendations based on size, but also depth, were taken into account. The primary endpoint was return to sport. RESULTS: A final functional evaluation with the AOFAS (American Orthopedic Foot & Ankle Society) score was performed at a minimum of 12 months. Of 58 sports patients, 70.6% returned to sport (41/58) with an average delay of 4.3 months. A high AOFAS functional score (p=0.02) and a stage 1 lesion (p=0.006) were the only preoperative criteria significantly associated with a return to sport. No other factor was predictive of a return to sport. CONCLUSION: Our prospective study shows that 70.6% of sports patients returned to sport after OLTD surgery according to a surgical protocol and standardized follow-up. LEVEL OF EVIDENCE: II.

Recovery of leg strength based on isokinetic testing after tumor resection and reconstruction with a modular rotating hinge knee system: Prospective cross-sectional study with a minimum follow-up of 24 months.

BACKGROUND: While modular reconstruction implants can be used to replace the bone lost after bone tumor resection, tumor excision from the neighboring soft tissues can lead to loss of strength and joint range of motion (ROM), which results in worse knee function. Functional recovery after total knee arthroplasty for osteoarthritis has been extensively documented. But few studies have evaluated the recovery after total knee reconstruction following tumor excision despite the fact that most of these patients are young and have high functional demands. We did a prospective cross-sectional study to: 1) compare muscle strength recovery around the knee with an isokinetic dynamometer after tumor excision and reconstruction with a modular implant to the healthy contralateral knee; 2) determine if the differences in peak torque (PT) in the knee extensors and flexors had a clinical impact. HYPOTHESIS: Resection of soft tissues during tumor excision around the knee causes strength loss that cannot be fully recovered. METHODS: The 36 patients who underwent extra- or intra-articular resection of a primary or secondary bone tumor in the knee area followed by reconstruction with a rotating hinge knee system between 2009 and 2021 were eligible for this study. The primary outcome was the ability to actively lock the operated knee. The secondary outcomes were the concentric PT during isokinetic testing at slow (90°/sec) and fast (180°/sec) speeds, flexion-extension ROM, Musculoskeletal Tumor Society (MSTS) score, the IKS, Oxford Knee Score (OKS) and KOOS. RESULTS: Nine patients agreed to participate in the study, all of whom had regained the ability to lock their knee postoperatively. PT in flexion and extension on the operated knee was less than the healthy knee. The PT ratio for the operated/healthy knee at 60°/sec and 180°/sec in flexion was 56.3%±16.2 [23.2-80.1] and 57.8%±12.3 [37.7-77.4], respectively, which corresponded to a slow-speed strength deficit of 43.7% in the knee flexors. The PT ratio for the operated/healthy knee at 60°/sec and 180°/sec in extension was 34.3%±24.6 [8.6-76.5] and 43%±27.2 [13.1-93.4], respectively, which corresponded to a slow-speed strength deficit of 65.7% in the knee extensors. The mean MSTS was 70%±20 [63-86]. The OKS was 29.9/48±11 [15-45], the mean IKS knee was 149.6±36 [80-178] and the mean KOOS was 67.43±18.5 [35-88.7]. DISCUSSION: Despite all patients having the ability to lock out their knee, there was an imbalance in the strength between opposite muscle groups: 43.7% strength deficit at slow-speed and 42.2% at fast speed for the hamstring muscles, and 65.7% at slow-speed and 57% at fast speed for the quadriceps muscles. This difference is considered pathological with an increased risk of knee injury. Despite this strength deficit, this joint replacement technique, which is free of complications, can preserve good knee function with acceptable knee joint ROM and satisfactory quality of life. LEVEL OF EVIDENCE: III; prospective cross-sectional case-control study.

Long-term outcome for repair of osteochondral lesions of the talus by osteochondral autograft: A series of 56 Mosaicplasties®.

INTRODUCTION: The present study analyzed results in 56 osteochondral Mosaicplasty® autografts for osteochondral lesion of the talus (OLT) at more than 5 years' follow-up. HYPOTHESIS: Mosaicplasty® shows long-term efficacy and low morbidity in the treatment of OLT. PATIENTS AND METHODS: A multicenter retrospective study included patients treated by Mosaicplasty® with more than 5 years' follow-up. Preoperative data were collected from medical files, and all patients were reassessed. AOFAS scores and FAOS were calculated at last follow-up. Imaging comprised standard radiographs and MRI or CT arthrography of the ankle. RESULTS: Fifty-six patients were included, with a mean age of 34 years (range, 18-60 years). Seventeen involved work accidents. Mean follow-up was 8.5 years (range, 5-20 years). Mean AOFAS score at follow-up was 80.6±19.4 and mean FAOS 77.8±21.5. Work accident, preoperative osteoarthritis and untreated laxity correlated significantly with poorer results. At last follow-up, 22 patients (39%) showed signs of osteoarthritis. There was no morbidity implicating the malleolar osteotomy. There were 11 cases (20%) of persistent patellar syndrome at the donor site. DISCUSSION: The present results were comparable to those reported elsewhere, showing that functional results of Mosaicplasty® autograft for OLT do not deteriorate over the long term. Work accidents correlated significantly with poorer functional outcome. Any associated instability must always be treated. Malleolar osteotomy provides good exposure without additional morbidity. LEVEL OF EVIDENCE: IV; retrospective study.

Osteochondral lesion of the talus: What are we talking about?

INTRODUCTION: The analysis of osteochondral lesions of talus (OLT) is currently mostly descriptive, not permitting an understanding of the different nosological frameworks of these lesions. Better knowledge of the characteristics of patients with OLT should make it possible to optimize the surgical indications and anticipate the associated lesions, which should not be overlooked. The main objective of this study was, therefore, to assess the characteristics of patients with OLT, and to analyze the lesions encountered. HYPOTHESIS: OLTs correspond to variable entities responding to specific treatments. MATERIAL AND METHOD: This was a prospective multicenter descriptive study including all patients operated on for an OLT, aged between 15 and 65 years, across 10 French specialist centers. The demographic, clinical and radiological data of the patients were analyzed. RESULTS: OLTs predominantly affect males and patients in their thirties. Two types of OLT should be distinguished: a lateral OLT; smaller and more superficial, most often presenting with painful instability, in the context of trauma, and a medial OLT; more frequent, wider and deeper. DISCUSSION: Two nosological frameworks exist for OLTs, and correspond to precise surgical indications: medial lesions of more than 10mm2 and more than 5mm in depth, with isolated anteromedial pain and significant functional impairment, most often idiopathic, generally requiring treatment by osteochondral autografts. Lateral lesions less than 5mm in depth and less than 10mm2, often superficial, following trauma or ankle laxity, associated with lateral ligament damage in one-third of cases, and a clinical presentation associated to instability and pain, requiring treatment most often by microfracture with associated ligament repair. LEVEL OF EVIDENCE: III.

Safety of malleolar osteotomies in surgery for osteochondral lesions of the talus.

The talus is a central bone in the hindfoot that is difficult to access surgically. Performing a medial or lateral malleolar osteotomy in the management of an osteochondral lesion of the talus (OLT) is a feared procedure amongst surgeons and their patients. The objective of this study was to assess the complications inherent to malleolar osteotomies in the treatment of OLTs. HYPOTHESIS: The use of a standardized protocol concerning the technical performance and osteosynthesis of malleolar osteotomies results in fewer postoperative complications than a non-standardized protocol. MATERIALS AND METHOD: This is a comparative study comprising a prospective multicenter non-randomized series with a standardized protocol for performing malleolar osteotomies, and a multicenter retrospective series without a standardized protocol. We included all patients aged 16 to 65 years with symptomatic OLTs, resistant to more than 6-months of well-conducted medical treatment, for whom surgery was considered. The minimum follow-up was 1 year for the prospective study, and 5 years for the retrospective study. A total of 86 and 97 patients were included in the prospective and retrospective studies, respectively. Of these 183 patients, 86 patients (33 prospective and 53 retrospective) underwent medial or lateral malleolar osteotomies as part of their surgery for OLT. Complications specific to the osteotomy procedures such as scar tissue, surgical site infection, non-union, articular malunion, neurological lesions or surgical revision, were investigated. RESULTS: No specific complication was found to be associated to the malleolar osteotomy. No surgical revision was directly linked to the osteotomy procedure. No significant difference was found between the two series. DISCUSSION: There was no evidence of morbidity related specifically to medial or lateral malleolar osteotomies. A standardized protocol, subject to rigorous technical implementation, does not improve results after malleolar osteotomy. The fear associated with this malleolar osteotomy procedure seems unfounded. LEVEL OF EVIDENCE: IV.

Management of symptomatic postoperative epidural hematoma in spine surgery: Medicolegal implications.

INTRODUCTION: Spine surgery is one of the specialties with the highest medicolegal risk, with a legal action initiated every 17 months per practitioner. One of the most dreaded complications is an epidural hematoma with postoperative deficit. The treatment of this complication is still being debated. We therefore conducted a retrospective study of the database of a medical liability insurer to assess perioperative factors determining the liability of the surgeon or paramedical team during an expert review in the event of a postoperative symptomatic epidural hematoma. HYPOTHESIS: To identify the factors determining the liability of the medical team in the event of a postoperative symptomatic epidural hematoma. MATERIALS AND METHODS: We retrospectively analyzed the largest French register of medicolegal expert reviews between 2011 and 2018. We identified 68 cases by entering the following keywords in this database: "spine surgery," "complications," and "epidural hematoma." After a thorough review of each case, only 14 were deemed to be truly relevant to our study. We collected for each patient the perioperative data, complications (including neurologic deficits) and their clinical course. RESULTS: Only one surgeon was accused and found liable for failing to perform a surgical revision within a reasonable timeframe (time to revision of 11 days). In 2 cases, the liability of a nurse working in the surgical department was called into question for failing to contact the surgeon upon the onset of symptoms. In the other cases (11 patients, 79%), the occurrence of a symptomatic epidural hematoma was considered a no-fault medical accident that was not caused by the surgeon. The presence of a drain did not have any medicolegal impact in the cases reviewed. CONCLUSION: The key element in medicolegal decisions is the reaction time of the healthcare teams, in particular the time between the onset of symptoms and surgical revision. According to these expert reviews, the placement of a drain was not taken into consideration during the medicolegal assessment of a postoperative symptomatic epidural hematoma. LEVEL OF EVIDENCE: II; retrospective prognostic study, investigation of patient characteristics and their impact on functional outcome.

Perilunate fracture-dislocations: Clinical and functional outcomes at a mean follow-up of 3.3 years.

INTRODUCTION: Perilunate lesions in the carpus are severe injuries whose functional consequences can limit patients' ability to regain their pre-injury activity levels. The aim of this study was to evaluate the outcomes of a series of patients who suffered a perilunate fracture-dislocation and to assess their ability to resume their social and professional activities. HYPOTHESIS: After surgical management of this injury, the medium-term functional outcomes will allow patients to return to their pre-injury social and professional activities. MATERIALS AND METHODS: This was a single center, retrospective study. Included patients were adults who had suffered a perilunate fracture-dislocation that was treated emergently. The clinical and functional assessment consisted of comparing the mobility and grip strength between the injured and contralateral wrists, determining the functional outcome scores and the resumption of social and professional activities. A radiological assessment was done to look for instability of the proximal row of the carpus, nonunion or necrosis of the carpal bones, loss of carpal height, and presence of carpal osteoarthritis. RESULTS: Ten patients were included with a mean follow-up of 39.4 months. The mean flexion/extension arc decreased significantly to 88° (20°-150) which was 55% of the healthy contralateral side (p=0.0026) while the grip strength decreased but not significantly (40.6 Kg vs. healthy side 62.4 Kg, p=0.063). The mean MWS was 58.75 (40-100), the mean PRWE was 32.9 (4-67.5) and the mean QuickDASH was 30.2 (0-77). Six of the ten patients (60%) were able to return to work, although three required occupational reclassifications. Four patients had signs of proximal row instability. There were seven instances of radiocarpal osteoarthritis, two of which were combined with mid-carpal osteoarthritis. DISCUSSION: This study found shorter range of motion and worse patient-reported outcomes than other published studies, which may be due to the severity of the perilunate fracture-dislocation injuries and the inclusion of polytrauma patients. Nevertheless, the subjective scores were comparable. These injuries have serious consequences on social and professional activities of manual workers. LEVEL OF EVIDENCE: IV; retrospective study.

A low teres minor index of trophicity negatively impacts the functional outcomes of reverse shoulder arthroplasty.

INTRODUCTION: The teres minor (TM) participates in active external rotation (ER) after reverse shoulder arthroplasty (RSA). The TM index of trophicity (T2/G) measured on CT scan is a predictor of poor results in patients who have irreparable rotator cuff tears. The aim of this study was to evaluate how T2/G impacts the functional outcomes of RSA in the context of massive rotator cuff tears. We hypothesized that a T2/G less than 0.75 is a predictor of worse functional outcomes. MATERIALS AND METHODS: This study involved 32 shoulders in 26 patients (mean age 71 years) who underwent RSA for cuff tear arthropathy and had a minimum follow-up of 1 year (mean 3 years). T2/G is the ratio between T2 (TM thickness) and G (maximum glenoid cavity thickness) on preoperative axial CT slices. Clinical examination at the final assessment involved determining the Constant score, the shoulder joint's range of motion and the Subjective Shoulder Value (SSV). RESULTS: Eight shoulders had a T2/G of less than 0.75 (group 1) while 24 shoulders had an index above 0.75 (group 2). These two groups were similar preoperatively. The Constant-Murley score in group 1 was significantly lower than in group 2 (50.2 points versus 59.7 points, p<0.05). Group 1 had a postoperative improvement of 1̊ in their ER with elbow at side while group 2 had a 16.5̊ improvement (p=0.002). Group 1 had a postoperative loss of 6.3̊ in their ER in 90̊ abduction while group 2 had a 21.7̊ improvement (p=0.001). The SSV at the final assessment was 69% in group 1 versus 79% in group 2 (p=0.094). CONCLUSION: Having a TM index of trophicity below 0.75 is a negative predictor of clinical outcomes due to lack of ER after RSA. LEVEL OF EVIDENCE: IV.

Arthroscopic Bankart Repair Versus Immobilization for First Episode of Anterior Shoulder Dislocation Before the Age of 25: A Randomized Controlled Trial.

BACKGROUND: The risk of recurrence after the first episode of anterior shoulder dislocation is high with nonoperative treatment in younger patients. PURPOSE/HYPOTHESIS: The aim of this study was to compare the results of arthroscopic Bankart repair and nonoperative treatment for shoulder dislocation in patients younger than 25 years, with a minimum of 2 years of follow-up. The hypothesis was that surgery would decrease the risk of recurrence. STUDY DESIGN: Randomized controlled trial; Level of evidence, 1. METHODS: We included patients aged between 18 and 25 years after a first episode of anterior shoulder dislocation and divided them into 2 groups. The first group was treated surgically with an arthroscopic Bankart repair within 2 weeks after the dislocation; the second group was treated nonoperatively. Both groups were immobilized for 3 weeks in internal rotation and followed the same physical therapy protocol. Standard radiography and computed tomography were performed immediately after reduction of the dislocation, and follow-up was performed at 3, 6, 12, and 24 months. The primary outcome measure was instability recurrence, defined as another anterior shoulder dislocation requiring closed reduction by another person (the patient was unable to reduce the dislocated joint themselves), a subluxation, or a positive apprehension test. Secondary outcome measures included range of motion, return to sport, and functional scores such as the short version of the Disabilities of the Arm, Shoulder and Hand score the Walch-Duplay score, and the Western Ontario Shoulder Instability Index (WOSI). RESULTS: A total of 20 patients were included in each group. The mean ± SD age was 21 ± 1.8 years, and there were 33 men (82.5%) and 7 women (17.5%) in the total sample. Recurrence of instability was significantly decreased in the surgical treatment group compared with the nonoperative group (2 [10%] vs 14 [70%], respectively; P = .0001). Fewer patients in the surgical treatment group versus the nonoperative group had another episode of dislocation (0 vs 6 [30%], respectively), subluxation (2 [10%] vs 13 [65%], respectively; P = .003), or a positive apprehension test (1 [5%] vs 11 [58%], respectively; P = .0005). The Walch-Duplay score (88.4 vs 70.3 points; P = .046) and WOSI (11.5 vs 17.7 points; P = .035) were significantly better in the surgical group versus the nonoperative group after a 2-year follow-up. Level of sport was the same or better in 89% of the surgical treatment group vs 53% of the nonoperative treatment group (P = .012). No surgical complication was recorded. We did not find any significant difference in range of motion. CONCLUSION: In patients with first-time shoulder dislocations, arthroscopic labral repair (Bankart procedure) reduced the risk of secondary shoulder dislocation and improved functional outcome versus nonoperative treatment after a 2-year follow-up. Surgical treatment after a first episode of shoulder dislocation could be offered as a primary treatment option in a younger population if these results are confirmed by larger studies with a longer follow-up. REGISTRATION: NCT03315819 (ClinicalTrials.gov identifier).

Proposal of a new CT arthrographic classification system of osteochondral lesions of the talus.

BACKGROUND: Surgical treatment of osteochondral lesions of the talus (OLT) is warranted if medical treatments fail, achieving good results in around 85% of cases. Numerous classification systems, based on all possible imaging modalities (radiography, MRI, CT scan, scintigraphy, and CT arthrography), have been proposed to guide surgical treatments, but none has proven to be superior. A recent study demonstrated the prognostic value of CT arthrography by accurately describing the subchondral bone plate. A systematic review of the literature has brought new criteria to predict good outcome following bone marrow stimulation surgical techniques: lesions should measure less than 1 centimeter in size and 5 millimeters in depth. Based on these data, we are proposing a new simple, 3-stage CT arthrographic classification system of OLT. MATERIALS AND METHODS: After a brief overview of the classification, 60 CT-arthrographies of ankles with OLT were organized according to this new CT arthrographic classification system by four surgeons (two juniors and two seniors). Two imaging assessments were performed one month apart. Statistical analysis was performed using the Fleiss' kappa coefficient to determine the inter- and intraobserver agreement. RESULTS: An excellent inter- and intraobserver agreement was found with overall Fleiss' kappa coefficients of 0.897 and 0.847, respectively. CONCLUSION: The results of our study showed an excellent inter- and intraobserver agreement for this new CT arthrographic classification system of OLT. The principal advantage of this new classification system, based on the latest data in the literature, is its ability to easily distinguish lesions that are more amenable to bone marrow stimulation techniques. LEVEL OF EVIDENCE: II.

Four-corner fusion: Clinical and radiological outcome after fixation by headless compression screws or dorsal locking plate at minimum 5 years' follow-up.

INTRODUCTION: Among the various procedures for degenerative carpal lesions, four-corner fusion relieves pain while conserving motion and strength. There are various fixation options, not presently standardised. HYPOTHESIS: Internal fixation by screws or dorsal locking plate provides good 5-year clinical results in four-corner fusion. MATERIAL AND METHOD: A single-centre retrospective study included 18 four-corner fusions at a minimum 5 years' follow-up: 8 plate and 10 screw fixations. Endpoints comprised pain, wrist range of motion, grip strength, QuickDASH and PRWE scores, and immobilisation time. Radiographic analysis was performed and complications inventoried. RESULTS: Pain VAS score fell to 1/10 in both groups. Flexion-extension was 56° with screws and 55° with plates. QuickDASH was 20.5 and 4.6 respectively, and PRWE 11 and 9. Grip strength was 16kg in both groups. The consolidation rate was 85.7% with screws and 57.1% with plates. Eighty percent of patients with screw fixation progressed toward radiolunate osteoarthritis. Four patients required revision surgery: 3 in the screw group and 1 in the plate group. DISCUSSION: There was clear clinical and functional improvement in both groups at a minimum 5 years. Consolidation was better with screw fixation, but with risk of radiolunate osteoarthritis. LEVEL OF EVIDENCE: IV, retrospective study.

Percutaneous basal closing wedge osteotomy for hallux valgus deformity.

OBJECTIVE: This article describes the percutaneous technique of a minimally invasive basal closing wedge osteotomy for correction of hallux valgus. INDICATIONS: This procedure allows correction of severe deformity with a minimally invasive approach. CONTRAINDICATIONS: No specific contraindication; a fusion would be preferred for an arthritic tarsometatarsal or metatarsophalangeal joint. SURGICAL TECHNIQUE: The surgical technique is based on the use of burrs specifically adapted for foot surgery. A basal closing wedge osteotomy is performed and fixed percutaneously. Each step is controlled under fluoroscopy. POSTOPERATIVE MANAGEMENT: A postoperative heel shoe is prescribed for 6 weeks with crutches. The foot is elevated during the first 2 weeks. Impact is forbidden for 3 months. RESULTS: The authors report good and excellent results with an average correction of the hallux valgus angle of 26° and an intermetatarsal angle of 8.2°.

Clinical, functional and prognostic results after repair of peripheral lesions of the triangular fibrocartilage complex: a retrospective study of 21 patients.

OBJECTIVES: The main objective of this study was to assess the clinical and functional outcomes of arthroscopic TFCC repair in patients with an isolated Atzei type 1, 2 or 3 lesion or after a distal radius fracture. The secondary objective was to identify which factors could contribute to poor functional outcome. METHODS: A retrospective study was conducted from November 2017 to May 2019. The inclusion criteria were patients with an Atzei type 1, 2 or 3 TFCC lesion who underwent arthroscopic repair and with a minimum of 6-month follow-up. Wrist motion, grip and pronation-supination strength were noted. QuickDASH, MMWS and PRWE scores were performed. An analysis was conducted to search for poor outcomes predictive factors (MMWS < 80). RESULTS: Twenty-one patients were included with a mean follow-up of 26 months. Seventeen patients (80%) had an Atzei 1 lesion, one (4.8%) had an Atzei 2, and 3 (14%) had an Atzei 3. Wrist motion significantly decreased compared to contralateral. Only pronation and supination were not significant. Grip strength was 73.4% compared to the contralateral (p = 0.002). Mean PRWE was 29.14 (1.5-70.5), QuickDASH was 30.72 (2.3-70.5), and MMWS was 79.3 (35-100). In all patients with a MMWS ≥ 80, none had lunotriquetral lesions when it was the case for 5 of 9 patients with a MMWS < 80 (p = 0.006). Except a story of workplace injury, no other prognosis factor was significant. CONCLUSION: Patients with Atzei 1, 2 or 3 TFCC who underwent arthroscopic repair seem to have good outcomes. However, an associated lunotriquetral lesion appears to worsen the functional prognosis.

Long-term radiological changes and functional outcomes after proximal row carpectomy: Retrospective study with 3 years' minimum follow-up.

INTRODUCTION: The aim of this study was to analyze the radiological changes and determine the clinical and functional outcomes of proximal row carpectomy (PRC) over the long term. HYPOTHESIS: Radiological changes after PRC occur in every patient while the clinical and functional outcomes remain stable over time. METHODS: This was a retrospective single-center study of patients who underwent PRC between January 2004 and December 2014. A clinical assessment (range of motion, grip strength), functional assessment (Mayo Wrist score and QuickDASH) and radiographic assessment (radiocapitate osteoarthritis, radiocapitate congruency) was done in every patient at the longest follow-up. RESULTS: Thirty-one patients were reviewed with a mean follow-up of 97.9 months. The indications for PRC were SLAC (n=10), SNAC (n=5), Kienböck disease (n=9) and other conditions (n=7). The radiocapitate index, which is the radius of curvature of the tip of the capitate divided by the mean radius of curvature of the lunate fossa, went from 0.68 immediately postoperative to 0.74 at the final assessment (p=0.035). The mean flexion/extension arc was 93°. The mean grip strength was 25 kg. The mean QuickDASH was 29 and the mean Mayo Wrist score was 69. Fifteen patients had radiocapitate osteoarthritis. Seven patients (22%) required revision surgery for wrist fusion after a mean of 18.6 months. CONCLUSION: Radiological adaptation in the radiocapitate joint after PRC was found in this study. PRC is a reliable solution and yields stable outcomes over time for treating radiocarpal osteoarthritis, except in young adults and manual laborers who had a notable early revision rate. LEVEL OF EVIDENCE: IV - retrospective study.

Total trapeziectomy for osteoarthritis of the trapeziometacarpal joint: Clinical and radiological outcomes in 21 cases with minimum 10-year follow-up.

INTRODUCTION: Trapeziectomy is a technique of choice for osteoarthritis of the trapeziometacarpal joint, but few studies have assessed long-term radiological and clinical outcome in total trapeziectomy, mean follow-up being rather between 2 and 6 years in most cases. The main aim of the present study was to assess loss of trapezial space height at a minimum 10 years' follow-up. Secondary endpoints comprised functional outcome at the same follow-up. HYPOTHESIS: There is systematic loss of trapezial space height, with discrepancy between radiological and clinical results, beyond 10 years' follow-up. MATERIAL AND METHODS: Sixteen patients were retrospectively reassessed at a mean 13.8 years' follow-up (range, 10-17.8 years), for 21 total trapeziectomies. Criteria for the main endpoint comprised trapezial space height (TSH) and trapezial space ratio (TSR=TSH/thumb P1 phalanx length). Secondary endpoint criteria comprised pain, Kapandji opposition and retropulsion scores, active abduction, dynamometric parameters (key-pinch, tip-pinch and grip strength compared to the contralateral side), QuickDASH and satisfaction. RESULTS: Mean TSH and TSR were respectively 3.7mm (range, 0.5-6.1) and 0.14 (0.02-0.25) at last follow-up. Ranges of motion were conserved, with mean Kapandji score of 9.3 (6-10), Kapandji retropulsion score of 2.8 (1-4) and active abduction of 43° (30-45°). Strength measurements were comparable to contralateral values except for key-pinch, which was significantly weaker on the operated side (4.8kg (1.5-8.5kg) versus 5.5kg (1.5-8kg); p=0.041). Mean QuickDASH was 23.5 (0-68.2), and overall satisfaction on VAS was 9.5/10 (6-10). Statistical testing confirmed the absence of correlation between radiological and clinical criteria. DISCUSSION: Despite systematic trapezial space height loss, functional results were satisfactory and stable at a mean follow-up of 13.8 years. There was no correlation between radiological and clinical criteria in the long term. LEVEL OF EVIDENCE: IV, single-center retrospective study.