Factors associated with subjective shoulder function preoperatively and postoperatively after arthroscopic rotator cuff repair.

Background: Understanding factors associated with improvements in subjective shoulder function after arthroscopic rotator cuff repair (ARCR) helps clinicians identify targets for postoperative rehabilitation. The aim of this study was to investigate the factors associated with subjective shoulder function after ARCR.

Methods: Patients who underwent ARCR for rotator cuff tear with at least 12 months of follow-up were included.

Passive shoulder abduction range of motion at 3 months postoperatively is the most important prognostic factor for achieving full recovery of range of motion at 6 months after arthroscopic rotator cuff repair.

Background: After arthroscopic rotator cuff repair (ARCR), it is crucial for clinicians to predict the functional recovery in the early postoperative period for considering rehabilitation strategies. The aim of this study was to identify the prognostic factors in the early postoperative period for achieving full recovery of range of motion (ROM) at 6 months after ARCR.

Methods: This study included 184 patients who underwent ARCR.

Long-term outcomes of hemiarthroplasty using a smaller head combined with rotator cuff reconstruction in patients with cuff-tear arthropathy.

Background: Hemiarthroplasty (HHR) using a smaller head with rotator cuff reconstruction is a treatment option for cuff-tear arthropathy, offering advantages like facilitating rotator cuff-tear closure, increasing the lever arm of deltoid, and restoring function in irreparable cuff tears. This study aimed to evaluate the long-term outcomes of this procedure.

Methods: A retrospective analysis was conducted for 91 shoulders undergoing HHR using a smaller head with rotator cuff reconstruction between May 2005 and September 2012.

Correlation of suprascapular notch morphology with suprascapular nerve palsy: a 3D-computed tomography study.

Background: The morphology of the suprascapular (SS) notch is a very important factor in treatment of suprascapular nerve (SSN) palsy. Several studies have reported SS notch morphology in cadavers or using a three-dimensional computed tomography (3D-CT); however, none has reported the distribution of SS notch morphology according to the age group. In addition, the correlation between SS notch morphology and SSN palsy remains unclear.

Coronal Hamate Fractures with Carpometacarpal Dislocation Treated Effectively Using Headless Compression Screws with Percutaneous Pinning Fixation by Using the 2-Directional Approach: A Report of 2 Cases.

Case: Coronal shear fractures of the hamate are relatively rare injuries. Surgical intervention is recommended for displaced fractures. However, there is no established surgical procedure for the displaced coronal shear fractures of the hamate.

The effect of the remplissage procedure on shoulder range of motion: a cadaveric study.

Purpose: The purpose of this in vitro biomechanical study was to assess the effects of the remplissage procedure for small- and large-sized Hill-Sachs lesions (HSLs) on shoulder range of motion (ROM) with a special interest in the apprehension position.

Methods: HSLs of 50% and 100% of the glenoid width were simulated in 7 cadaveric shoulders as small and large lesions, respectively, and the postoperative condition was reproduced by placing suture anchors on the articular surface and tying down the infraspinatus at the medial edge of the would-be lesion site. ROMs were measured in abduction, internal rotation, and external rotation with the humerus in the adducted and abducted position.

Tensile properties of a morphologically split supraspinatus tendon.

The supraspinatus tendon consists morphologically of two sub-regions, anterior and posterior. The anterior sub-region is thick and tubular while the posterior is thin and strap-like. The purpose of this study was to compare the structural and mechanical properties of the anterior and posterior sub-regions of the supraspinatus tendon.

Effect of humeral head rotation on bony glenohumeral stability.

Background: The humeral head and glenoid cavity are not perfectly spherical, nor do they have matching radii of curvature. We hypothesized that glenohumeral stability is dependent on axial humeral rotation.

Methods: Seven cadaveric shoulders were investigated.

Transfer of teres minor with bone pedicle for irreparable posterior-superior rotator cuff tears.

Background: The objectives of this study are to evaluate the clinical and radiographic mid- to long-term outcomes of patients treated by teres minor with bone pedicle transfer for irreparable massive rotator cuff tear and to investigate the limitations of this procedure.

Methods: Clinical outcomes were assessed by quantifying: the range of shoulder motion; a visual analog pain scale; the University of California, Los Angeles Shoulder Score (UCLA score); and the Disability of the Arm, Shoulder, and Hand (DASH) score. Radiographs were assessed for deterioration of the glenohumeral joint and upper migration of the humeral head.

Clinical outcomes of excision arthroplasty for Kienbock's disease.

We have carried out a replacement of the lunate in 12 patients with advanced Kienböck's disease, with excision of the lunate and insertion of an iliac bone flap wrapped into palmaris longus. The aims of this study were to determine the effect of this procedure for advanced Kienböck's disease. At a mean follow-up period of 45.

Alterations of high-mannose type N-glycosylation in human and mouse osteoarthritis cartilage.

Objective: The process of N-glycosylation is involved in the pathogenesis of various diseases. However, little is known about the contribution of changes in N-glycans in osteoarthritis (OA). The aim of this study was to identify the alterations in N-glycans in human OA cartilage, to characterize the messenger RNA (mRNA) expression of N-glycan biosynthesis enzyme genes (N-glycogenes) in mouse articular chondrocytes during cartilage degradation, and to analyze the relationship between altered N-glycan patterns and mechanisms of cartilage degradation.

Palmar subluxation of the thumb carpometacarpal joint following the median nerve recurrent branch injury.

To our knowledge, the combination of a palmar subluxation of the thumb carpometacarpal (CMC) joint with low median nerve deficit followed by the recurrent branch injury is extremely rare. We present a case of the subluxation of the thumb CMC joint with low median nerve deficit.

Radial overgrowth after radial shortening osteotomies for skeletally immature patients with Kienböck's disease.

Purpose: We hypothesized that radial shortening osteotomy (radial shortening) for skeletally immature patients with Kienböck's disease would induce overgrowth of the radius. The purpose of this study was to determine the effect of radial shortening on radial growth in skeletally immature patients with Kienböck's disease and to clarify the relationship between the postoperative growth alterations and the clinical results.

Methods: Eight wrists of 8 skeletally immature patients with Kienböck's disease were treated with radial shortening.