Modified Distalization Shoulder Angle and Lateralization Shoulder Angle show weakly correlation with clinical outcomes following reverse shoulder arthroplasty.

Introduction: The focus in reverse shoulder arthroplasty (RSA) has been on the lateralization and distalization of prosthesis positioning, influenced by implant design and surgical technique. There's no consensus on the optimal amount of lateralization and distalization or the best radiographic parameters for evaluating placement. This study examines the correlation and the predictive value between previously described modified distalization shoulder angle (DSA) and lateralization shoulder angle (LSA) with postoperative outcomes, which aim to differentiate the contributions of the humeral and glenoid components in the global distalization and lateralization of the RSA.

Anterior Cruciate Ligament Reconstruction in Patients Older Than 50 Years: A Descriptive Study With Minimum 10-Year Follow-up.

Background: Anterior cruciate ligament (ACL) reconstruction is increasingly being performed in patients >50 years old; however, the long-term outcomes are unclear.

Purpose: To analyze the functional results, osteoarthritic progression, reoperation rate, and failure rate at minimum 10-year follow-up in patients >50 years old who have undergone primary ACL reconstruction.

Study Design: Case series; Level of evidence, 4.

Revision shoulder arthroplasty and proximal humeral bone loss: a comprehensive review and proposal of a new algorithm of management.

With the rising prevalence of shoulder arthroplasty, the incidence of revision shoulder arthroplasty is also increasing. The complexity of these revision procedures poses significant challenges, with bone loss being a critical factor impacting treatment outcomes. Addressing substantial humeral bone defects is crucial for ensuring implant stability and functionality.

Risk prediction of kalaemia disturbance and acute kidney injury after total knee arthroplasty: use of a machine learning algorithm.

Introduction: Total knee arthroplasty (TKA) is a procedure associated with risks of electrolyte and kidney function disorders, which are rare but can lead to serious complications if not correctly identified. A routine check-up is very often carried out to assess the seric ionogram and kidney function after TKA, that rarely requires clinical intervention in the event of a disturbance. The aim of this study was to identify perioperative variables that would lead to the creation of a machine learning model predicting the risk of kalaemia disorders and/or acute kidney injury after total knee arthroplasty.

Bone Density Changes at the Origin of the Deltoid Muscle following Reverse Shoulder Arthroplasty.

Reverse total shoulder arthroplasty (RSA) significantly impacts deltoid length, tension, and structure. Studies have extensively investigated various modifications in deltoid characteristics, such as perfusion, elasticity, caliber, histological changes, and strength post-RSA. However, to date, there is a notable absence of research evaluating changes in bone mineral density (BMD) at the deltoid muscle origin after the RSA procedure.

Osteotomies for genu varum: Should we always correct at the tibia? A multicenter analysis of practices in France.

Introduction: Tibial correction is often performed during a valgus-producing osteotomy for genu varum. However, overcorrection and the creation of a joint line obliquity (JLO) have been associated with unfavorable functional outcomes after high tibial osteotomy (HTO). The aims of this study were to analyze: 1) the corrections obtained after HTO; 2) the rationale behind the indication per the European Society for Sports Traumatology Surgery and Arthroscopy (ESSKA) recommendations; and 3) the correlation between the postoperative corrections obtained and functional outcomes.

Ultrasound-guided thermal radiofrequency ablation of the genicular nerves after total knee replacement.

The rate of refractory chronic pain after total knee replacement (TKR) is 20-25%, with no identifiable etiology in 6% of cases. Without an etiologic diagnosis, the surgeon is unlikely to consider revision, but pain poses a therapeutic challenge for achieving satisfaction and an acceptable quality of life. Genicular nerve radiofrequency ablation (GNRFA) was recently developed as a non-drug analgesic option.

Comparative study of bilateral total hip arthroplasty in one or two stages.

Introduction: Bilateral total hip arthroplasty (Bi THA) for disabling bilateral hip osteoarthritis can be performed in one or two operative sessions. The objective of this study was to compare the complication rates of a group of patients who had bilateral THA in one operating session (Bi-1S THA) to a matched group of patients who had bilateral THA in two separate operating sessions (Bi-2S THA).

Materials And Methods: This retrospective case-control study compared 84 Bi-1S THA matched to 84 Bi-2S THA by age, gender, diagnosis, ASA score (1-2) and surgical approach.

The impact of confinement on orthopaedic and trauma surgical activity.

Introduction: On the 16th of March 2020, in the face of a health emergency declared in France, the government imposed containment measures whose impact on orthopaedic and trauma surgery remains to be demonstrated. The hypothesis of this study was that confinement reduced orthopaedic and trauma surgical activity. The main objective was to assess orthopaedic and trauma surgical activity during confinement and to compare it to the activity outside confinement.

Simulation in shoulder arthroplasty education using three-dimensional planning software: the role of guidelines and predicted range of motion.

Aim: To demonstrate how reverse shoulder arthroplasty (RSA) planning software could be used to improve how the trainees position glenoid and humeral implants and obtain optimal simulated range of motion (ROM).

Methods: We selected four groups of five various level participants: medical student (MS), junior resident (JR), senior resident (SR), and shoulder expert (SE). Thereafter, the 20 participants planned five cases of arthritic shoulders for a RSA on a validated planning software following three phases: (1) no guidelines and no ROM feedback, (2) guidelines but no ROM feedback, and (3) guidelines and ROM feedback.

High tibial flexion osteotomy for symptomatic ligamentous genu recurvatum.

Introduction: Symptomatic Ligamentous Genu Recurvatum (SLGR) is characterized by an asymmetrical hyperextension of the knee associated with pain and a feeling of instability occurring even during walking. The ligamentous origin of the recurvatum is linked to a sprain in hyperextension responsible for a rupture of the posterior structures that may be associated or not with a rupture of the cruciate ligaments.

Hypothesis: Tibial Flexion Osteotomy (TFO) allows control of a SLGR without rupture of the cruciate ligaments secondary to a sprain in hyperextension.

Short-term outcomes and survival of pyrocarbon hemiarthroplasty in the young arthritic shoulder.

Hypothesis: The purpose was to report the short-term outcomes and survival of hemiarthroplasty with a pyrocarbon head (HA-PYC) for the treatment of shoulder osteoarthritis in patients aged ≤ 60 years. We hypothesized that HA-PYC could be an alternative to hemi-metal (avoiding the risk of rapid glenoid erosion) and total shoulder arthroplasty (TSA) (avoiding the risk of rapid glenoid loosening) in an active patient population.

Methods: Sixty-four consecutive patients (mean age, 53 years) who underwent HA-PYC for glenohumeral osteoarthritis were included.

Outpatient shoulder prostheses: Feasibility, acceptance and safety.

Introduction: Outpatient surgery in France is defined by the national authority for health (HAS) as a scheduled surgery enabling same-day discharge without any increased risk to the patient. With the advent of enhanced recovery after surgery, outpatient lower limb arthroplasty has become a common procedure. However, only 1.

Recurrent posterior shoulder instability starting in childhood and adolescence.

Aims: We aimed to address the question on whether there is a place for shoulder stabilization surgery in patients who had voluntary posterior instability starting in childhood and adolescence, and later becoming involuntary and uncontrollable.

Methods: Consecutive patients who had an operation for recurrent posterior instability before the age of 18 years were studied retrospectively. All patients had failed conservative treatment for at least six months prior to surgery; and no patients had psychiatric disorders.

Arterial grafts for proper palmar digital artery reconstruction: An anatomical study.

Digital ischemia due to arterial defects need urgent surgical management. The traditional treatment consists of vascular reconstruction using a reversed autologous venous graft as a bypass. Very few studies have described the use of arterial grafts for digital artery reconstruction.

Pre- or postoperative radiotherapy for soft tissue sarcomas.

Sarcomas are rare tumours arising from mesenchymal tissue. A multimodal management in an expert centre combining surgery and radiotherapy is the current standard of care for localized soft-tissue sarcomas of the extremities, to enable limb-sparing strategies. The delivery of pre- radiotherapy or postoperative radiotherapy offers similar local control and survival rates but the toxicity profile is quite different: preoperative radiotherapy increases the risk of wound complications and postoperative radiotherapy affects long-term functional outcomes.

Volar fracture dislocation of the 2nd metacarpal base associated with acute carpal tunnel syndrome: A case report.

Posttraumatic acute carpal tunnel syndrome is a not a usual complication in traumatic hand injuries but requires more urgent and aggressive management. Compression of the median nerve should be systematically sought when there is a major and painful swelling of the hand, associated with one or several hand and wrist fractures. In rare case, a single metacarpal fracture or dislocation can be the only cause of median nerve compression and requires urgent diagnosis.

One-stage bilateral total hip arthroplasty versus unilateral total hip arthroplasty: A retrospective case-matched study.

Background: One-stage bilateral hip replacement has the advantage of involving a single anesthesia, single hospital admission and single rehabilitation program. The theoretic drawback is increased surgical risk. Few French series have been reported, and none with comparison versus unilateral arthroplasty.

Effect of humeral stem and glenosphere designs on range of motion and muscle length in reverse shoulder arthroplasty.

Purpose: To determine how different combinations of humeral stem and glenosphere designs for reverse shoulder arthroplasty (RSA) influence range of motion (ROM) and muscle elongation.

Methods: A computed tomography scan of a non-pathologic shoulder was used to simulate all shoulder motions, and thereby compare the ROM and rotator cuff muscle lengths of the native shoulder versus 30 combinations of humeral components (1 inlay straight stem with 155° inclination and five onlay curved stems with 135°, 145° or 155° inclinations, using concentric, medialized or lateralized trays) and glenospheres (standard, large, lateralized, inferior eccentric and bony increased-offset (BIO-RSA)).

Results: Only five of the 30 combinations restored ≥ 50% of the native ROM in all directions: the 145° onlay stem (concentric tray) combined with lateralized or inferior eccentric glenospheres and the 145° stem (lateralized tray) combined with either a large, lateralized or inferior eccentric glenosphere.

Revision of failed shoulder arthroplasty: epidemiology, etiology, and surgical options.

Background: Our aim was to analyze the epidemiology, etiologies, and revision options for failed shoulder arthroplasty from 2 tertiary centers.

Methods: From 1993 to 2013, 542 failed arthroplasties were revised in 540 patients (65% women): 224 hemiarthroplasties (HAs, 41%), 237 anatomic total shoulder arthroplasties (TSAs, 44%) and 81 reverse total arthroplasties (RSAs, 15%). Data about patients, pathology, and reintervention procedures, as well as intraoperative data, were analyzed from our 2 local registries that prospectively captured all the revision procedures.