The long-term results of shoulder hemiarthroplasty in irreducible four-part fracture-dislocation of the proximal humerus without rotator cuff tear arthropathy.

Purpose: Although there are concerns about nonunion of the greater tuberosity or shoulder weakness, hemishoulder arthroplasty (HSA) is a viable treatment option for irreducible four-part proximal humerus fractures-dislocation without rotator cuff tear arthropathy. This study aims to analyze the long-term radiological and functional outcomes of HSA.

Methods: This study enrolled 36 patients who underwent HSA due to irreducible four-part proximal humerus fracture-dislocation without rotator cuff tear arthropathy between March 2005 and May 2020.

Analysis of changes in tibial torsion angle on open-wedge high tibial osteotomy depending on the osteotomy level.

Purpose: This study evaluated the tibial torsional angle changes of 72 knees before and after open-wedge high tibial osteotomy (OWHTO) and compared the results according to the osteotomy level.

Materials And Methods: Seventy patients (72 knees) with Kellgren-Lawrence grade 3 underwent OWHTO. Demographic data, operation procedures, and measurement of mechanical tibiofemoral angle (mTFA), anatomical tibiofemoral angle (aTFA), tibial torsional angle (TTA), and pre- and postoperative Lysholm and International Knee Documentation Committee (IKDC) scores were obtained.

Conversion of Failed Reverse Total Shoulder Arthroplasty to Hemiarthroplasty: Three Cases of Instability and Three Cases of Glenoid Loosening.

Background: Glenoid loosening and postoperative instability are common causes of failed reverse total shoulder arthroplasty (RTSA). When soft-tissue problems or large glenoid bone defect interferes with reimplantation in revision RTSA, conversion to hemiarthroplasty can be considered. We present a case series of patients who underwent conversion to hemiarthroplasty due to glenoid loosening and early instability after RTSAs, along with clinical results.

Microfractures Versus a Porcine-Derived Collagen-Augmented Chondrogenesis Technique for Treating Knee Cartilage Defects: A Multicenter Randomized Controlled Trial.

Purpose: The purpose of this study was to evaluate the clinical efficacy and safety of treating patients with a cartilage defect of the knee with microfractures and porcine-derived collagen-augmented chondrogenesis technique (C-ACT).

Methods: One hundred participants were randomly assigned to the control group (n = 48, microfracture) or the investigational group (n = 52, C-ACT). Clinical and magnetic resonance imaging (MRI) outcomes were assessed 12 and 24 months postoperatively for efficacy and adverse events.

Discoid Medial Meniscus Tear, with a Literature Review of Treatments.

The present study reports our experience of treating four cases of symptomatic discoid medial meniscus, three of which were bilateral. We performed partial meniscectomy with a four-portal technique using a knife leaving a 6 mm peripheral margin after confirmation of magnetic resonance imaging findings. Clinical results were assessed at the end of 2-year follow-up using the Knee Injury and Osteoarthritis Outcome Score and a visual analogue scale.

Comparison of the Outcomes Between Headless Cannulated Screw Fixation and Fixation Using a Locking Compression Distal Ulna Hook Plate in Fracture of Fifth Metatarsal Base.

The aim of the present study was to evaluate and compare the clinical and radiologic results of internal fixation with a headless cannulated screw versus a locking compression distal ulna hook plate for fractures at the base of the fifth metatarsal bone, zone 1. From April 2012 to April 2015, 30 cases (29 patients) were retrospectively evaluated. The mean follow-up period was 13 months.

Primary synovial chondromatosis of the talonavicular joint: A case report.

Synovial chondromatosis developes by metaplasia of the synovial cells in the synovium of joints, and is a benign synovial tumor with multiple cartilaginous nodules. It is most commonly found in single and large joints, such as the knee, hip, and shoulder. Occurrence in the foot and ankle is uncommon, although there have been previous reports in the orthopedic and radiological literature of primary synovial chondromatosis in the subtalr, calcaneocuboid, naviculocuneiform, and metatarsaophalangeal joints.

Complications of medial unicompartmental knee arthroplasty.

Background: We report intra- and postoperative complications of unicompartmental knee arthroplasty (UKA).

Methods: This study was conducted on 246 cases of UKA which were performed for degenerative osteoarthritis confined to the medial compartment, from May 2002 to May 2010, for which follow-up periods longer than one year were available. Complications were divided into intra- and postoperative complications.

Results of revision surgery and causes of unstable total knee arthroplasty.

Background: The aim of this study was to evaluate causes of unstable total knee arthroplasty and results of revision surgery.

Methods: We retrospectively reviewed 24 knees that underwent a revision arthroplasty for unstable total knee arthroplasty. The average follow-up period was 33.

Results of arthroscopic partial meniscectomy for lateral discoid meniscus tears associated with new technique.

Purpose: To introduce and evaluate the clinical results of a new arthroscopic technique for partial meniscectomy of symptomatic lateral discoid meniscus using a knife.

Materials And Methods: From March 2005 to October 2010, 60 knees of 58 patients underwent arthroscopic partial meniscectomies for lateral discoid meniscus. The average age was 28.

Arthroscopic fixation technique for comminuted, displaced greater tuberosity fracture.

Purpose: The purpose of this retrospective study was to evaluate the early results of arthroscopic treatment in patients with comminuted, displaced greater tuberosity (GT) fractures using the arthroscopic double-row suture anchor fixation (ADSF) technique.

Methods: Between August 2004 and December 2007, we used the ADSF technique in 16 cases of isolated comminuted, displaced GT fractures. The early clinical results were evaluated in these patients at a mean of 24 months (range, 16 to 51 months) after surgery.