Converting to reverse shoulder arthroplasty from primary anatomic shoulder arthroplasty and fracture hemiarthroplasty: a radiographic and clinical outcome analysis at 8-years.

Introduction: Revision shoulder arthroplasty can be challenging. One of the main considerations for surgeons is the type of implant that was placed in the initial surgery. Anatomic shoulder arthroplasty (ASA) is used for cases of osteoarthritis as well as for fractures of the humeral head.

Single-Portal Proximal Biceps Tenodesis Using an All-Suture Anchor.

The long head of the biceps is an important pain generator of the shoulder joint. Pathologies of the long head of the biceps involve superior labrum anterior to posterior lesions, pulley lesions, partial tears of the biceps tendon, biceps tendonitis, and medial biceps subluxation caused by full-thickness subscapularis tendon tears. Treatment of an inflamed or injured long head of the biceps by either tenotomy or tenodesis is often mandatory during shoulder arthroscopy to avoid persisting pain and possible revision procedures.

Treatment of proximal humerus fractures using reverse shoulder arthroplasty: do the inclination of the humeral component and the lateral offset of the glenosphere influence the clinical outcome and tuberosity healing?

Introduction: The employment of reverse shoulder arthroplasty for dislocated proximal humerus fractures of elderly patients becomes increasingly relevant. The standard inclination angle of the humeral component was 155°. Lately, there is a trend towards smaller inclination angles of 145° or 135°.

Results after primary reverse shoulder arthroplasty with and without subscapularis repair: a prospective-randomized trial.

Introduction: Indications for reverse shoulder arthroplasties (rTSA) have increased since their development by Paul Grammont in 1985. Prosthesis design was enhanced over time, but the management of the tendon of the M. subscapularis (SSC-tendon) in primary rTSA is still a controversial subject with regard to perform a refixation or not.

Sonographic Measurement of Dynamic Horizontal Instability in Acromioclavicular Joint Instability: Description of a Simple Technique and Correlation to Radiographic Parameters.

Objective: Dynamic horizontal instability is considered to be the main reason for poor outcome after treatment for acromioclavicular (AC) joint instability. In this study, we describe a simple technique to quantify this pathology via sonography.

Methods: Thirty-six shoulders from 18 patients with ac joint instabilities were examined using modified Alexander views and a standardized sonographic examination.

Treating cuff tear arthropathy by reverse total shoulder arthroplasty: do the inclination of the humeral component and the lateral offset of the glenosphere influence the clinical and the radiological outcome?

Purpose: Reverse total shoulder arthroplasty is widely used for the treatment of cuff tear arthropathy. Standard implants consist of a humeral component with an inclination angle of 155° and a glenosphere without lateral offset. Recently, lower inclination angles of the humeral component as well as lateralized glenospheres are implanted to provide better rotation of the arm and to decrease the rate of scapular notching.

Elective shoulder surgery during the coronavirus disease 2019 pandemic in Germany: the patients' perspective.

Background: The coronavirus disease 2019 (COVID-19) pandemic has impeded the treatment of elective shoulder patients all over the world. Owing to the constraints in personnel and operation theater capacities, many patients who should undergo planned surgeries could not receive medical care. In our study, we examined the status quo of elective shoulder arthroscopy during the pandemic in Germany.

Arthroscopic and open partial arthroplasty for the treatment of focal grade IV cartilage defects of the humeral head.

Introduction: Focal Outerbridge grade IV cartilage defects of the proximal humerus may lead to pain and an impaired shoulder function. In cases of failed operative or conservative treatment options such as intraarticular injections or arthroscopic microfracturing of the subchondral bone, partial arthroplasty of the humeral may restore the articular surface of the humeral head without altering the anatomy. This study evaluates mid-term results of open and arthroscopic partial resurfacing of the humeral head in the context of focal grade IV cartilage defects.

[Arthroscopically-assisted treatment of acute and chronic dislocations of the acromioclavicular joint : A prospective clinical trial].

Background: Injuries of the acromioclavicular joint (ACJ) are frequent and often occur during sports. While arthroscopically-assisted stabilization of acute injuries of the ACJ is a well-established procedure, there is not much data available for arthroscopically-assisted stabilization of chronic injuries of the ACJ.

Objectives: This study assesses clinical and radiological results of arthroscopically-assisted stabilization of acute and chronic injuries of the ACJ.

Tuberosity healing improves functional outcome following primary reverse shoulder arthroplasty for proximal humeral fractures with a 135° prosthesis.

Introduction: Reverse shoulder arthroplasty (RSA) is a common treatment for proximal humeral fractures (PHFs) in the elderly. This study evaluates the influence of tuberosity healing (TH) on functional outcome following a 135° humeral inclination RSA for PHFs.

Methods: Retrospectively, all patients with an acute PHF treated with a 135° humeral inclination RSA at four centers during a three-year period were followed up.

Traumatic Tear of the Latissimus Dorsi Tendon in a CrossFit Athlete: Surgical Management.

Introduction: Traumatic tears of the latissimus dorsi tendon (LDT) are a rare sports injury that may occur during exercises involving horizontal and vertical pulling. A standardized treatment algorithm for this injury does not yet exist.

Case Report: A 30-year old male CrossFit Athlete experienced sudden unbearable pain in his right posterior shoulder during a bar muscle-up exercise.

All-Extra-articular Repair of Anterosuperior Rotator Cuff Tears.

Anterosuperior rotator cuff tears involve the subscapularis tendon, supraspinatus tendon, and rotator interval. The long head of the biceps is usually affected and unstable in these complex lesions. Arthroscopic repair of anterosuperior rotator cuff tears often consists of 2 different procedures.

Subacromial spacer implantation for massive rotator cuff tears: Clinical outcome of arthroscopically treated patients.

Background: Massive rotator cuff tears (MRCT) can be treated arthroscopically by partial reconstruction, tenotomy/tenodesis of the long head of the biceps, and debridement. A new treatment option is the additional implantation of a biodegradable spacer (InSpace Balloon®; ISB) into the subacromial space, which reduces subacromial shear forces to keep the humeral head centered in the glenoid. The aim of this study is to investigate the clinical outcome of patients with MRCT who were treated arthroscopically with or without an additional ISB.

Conversions from anatomic shoulder replacements to reverse total shoulder arthroplasty: do the indications for initial surgery influence the clinical outcome after revision surgery?

Introduction: The most frequent indications for anatomic shoulder replacement are glenohumeral osteoarthritis and fractures of the humeral head. If anatomic shoulder prostheses fail, reverse total shoulder arthroplasty is often the only remaining treatment option. This study evaluates the influence of indications for primary shoulder arthroplasty on the clinical outcome after conversion to reverse total shoulder arthroplasty.

Knowledge transfer of spinal manipulation skills by student-teachers: a randomised controlled trial.

Purpose: To assess the use of peer-assisted learning (PAL) of complex manipulative motor skills with respect to gender in medical students.

Methods: In 2007-2010, 292 students in their 3rd and 4th years of medical school were randomly assigned to two groups [Staff group (SG), PAL group (PG)] led by either staff tutors or student-teachers (ST). The students were taught bimanual practical and diagnostic skills (course education module of eight separate lessons) as well as a general introduction to the theory of spinal manipulative therapy.

Peer teaching: a randomised controlled trial using student-teachers to teach musculoskeletal ultrasound.

Objectives: This study (a post-intervention assessment) was designed to assess the effectiveness of peer-assisted learning (PAL) using student-teachers (STs) with limited training to teach complicated technical skills for interpreting ultrasound images of the shoulder.

Methods: Students in Years 3 and 4 of medical school were randomly assigned to two groups. In the PAL group (PG), teaching was delivered by a group of nine STs from Years 3 and 4, who undertook a 30-minute general training and 1 week of self-teaching.