Allogeneic Umbilical Cord-Blood-Derived Mesenchymal Stem Cells and Hyaluronate Composite Combined with High Tibial Osteotomy for Medial Knee Osteoarthritis with Full-Thickness Cartilage Defects.

: Although the effects of cartilage repair in patients who are undergoing high tibial osteotomy (HTO) remains controversial, cartilage repair may be required for the full-thickness cartilage defect because of a concern of lower clinical outcome. The purpose of this study was to investigate clinical outcome and cartilage repair following implantation of allogeneic umbilical cord-blood-derived MSCs (UCB-MSCs)-hyaluronate composite in patients who received HTO for medial knee osteoarthritis (OA) with full-thickness cartilage defect. : Inclusion criteria were patients with a medial knee OA, a full-thickness cartilage defect (International Cartilage Repair Society (ICRS) grade IV) ≥  3 cm of the medial femoral condyle, and a varus deformity  ≥  5°.

Postoperative immobilization using a short-arm cast in the semisupination position is appropriate after arthroscopic triangular fibrocartilage complex foveal repair.

Aims: The aim of this study was to assess and compare active rotation of the forearm in normal subjects after the application of a short-arm cast (SAC) in the semisupination position and a long-arm cast (LAC) in the neutral position. A clinical study was also conducted to compare the functional outcomes of using a SAC in the semisupination position with those of using a LAC in the neutral position in patients who underwent arthroscopic triangular fibrocartilage complex (TFCC) foveal repair.

Methods: A total of 40 healthy right-handed volunteers were recruited.

Adverse Reactions and Clinical Outcomes for Leukocyte-Poor Versus Leukocyte-Rich Platelet-Rich Plasma in Knee Osteoarthritis: A Systematic Review and Meta-analysis.

Background: Platelet-rich plasma (PRP) has gained attention as a therapeutic option for knee osteoarthritis; however, its efficacy varies widely. Leukocytes in PRP raise the concern of aggravating proinflammatory activity. To date, PRP has rarely been investigated with regard to leukocyte concentration.

Intra-articular Injection of Culture-Expanded Mesenchymal Stem Cells Without Adjuvant Surgery in Knee Osteoarthritis: A Systematic Review and Meta-analysis.

Background: Although many clinical studies have assessed the efficacy of mesenchymal stem cells (MSCs) in knee osteoarthritis, evidence on their efficacy remains unclear owing to heterogeneity of cell entity and concomitant procedures.

Purpose: To determine the efficacy of culture-expanded MSCs in knee osteoarthritis in terms of clinical outcome and cartilage repair via meta-analysis of randomized controlled trials (RCTs) without adjuvant surgery.

Study Design: Meta-analysis.

Arthroscopic Knot Removal for Failed Superior Labrum Anterior-Posterior Repair Secondary to Knot-Induced Pain.

Background: Studies on failed superior labrum anterior-posterior (SLAP) repair are increasing. However, the number of reports on treatment options for failed SLAP repair remains quite low, and the clinical results vary between different study groups.

Purpose: To describe the clinical presentation of failed SLAP repair due to knot-induced pain and evaluate the efficacy of arthroscopic knot removal.

Volumetric evaluation of the rotator cuff musculature in massive rotator cuff tears with pseudoparalysis.

Background: If the balance of the rotator cuff force couple is disrupted, pseudoparalysis may occur, but the exact mechanism remains unknown. This study investigated the effect of rotator cuff force couple disruption on active range of motion in massive rotator cuff tear (mRCT) by rotator cuff muscle volume analysis.

Methods: The study included 53 patients with irreparable mRCT: 22 in the nonpseudoparalysis group and 31 in the pseudoparalysis group.

Rotator Cuff Repair in Patients over 75 Years of Age: Clinical Outcome and Repair Integrity.

Background: Some studies have shown significant functional improvement after rotator cuff (RC) repair in elderly patients. However, few studies have reported the healing potential of RC tears in elderly patients.

Methods: Twenty-five patients aged ≥ 75 years who underwent RC repair were enrolled.

Clinical Outcomes of Semiconstrained Total Elbow Arthroplasty in Patients Who Were Forty Years of Age or Younger.

Background: Total elbow arthroplasty is not commonly used in young patients with advanced arthritis because of concerns regarding implant loosening and clinical failure. Until now, to our knowledge, there have only been a few studies on the outcome in younger patients undergoing total elbow arthroplasty.

Methods: Twenty-three elbows in patients forty years of age or younger who underwent total elbow arthroplasty were reviewed retrospectively.

Resection arthroplasty for periprosthetic infection after total elbow arthroplasty.

Background: Periprosthetic infection after total elbow arthroplasty (TEA) is a serious complication that has no clearly defined treatment. The purpose of this study was to report the outcomes of resection arthroplasty for treatment of infection after TEA and the factors influencing the result.

Methods: Ten elbows (9 patients) underwent resection arthroplasty for treatment of infection after TEA.

Long-term outcome of tuberoplasty for irreparable massive rotator cuff tears: is tuberoplasty really applicable?

Background: Tuberoplasty is a therapeutic option for irreparable massive rotator cuff tear (RCT). However, no study has reported long-term outcomes after arthroscopic tuberoplasty.

Methods: We evaluated 16 patients who underwent arthroscopic tuberoplasty for symptomatic irreparable massive RCT without pseudoparalysis.