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.

Comparison of osteoconductivity and absorbability of beta-tricalcium phosphate and hydroxyapatite in clinical scenario of opening wedge high tibial osteotomy.

The purpose of this study was to compare the osteoconductivity, and absorbability of hydroxyapatite or beta-tricalcium phosphate in clinical scenario of opening wedge high tibial osteotomy Total 41 knees of 40 patients with follow up period of more than 1 year were enrolled. These patients were divided into two groups, Group I (22 knees, 21 patients) used hydroxyapatite and Group II (19 knees, 19 patients) used beta-tricalcium phosphate as a substitute in the opening gap. According to proven method, the osteoconductivity was assessed radiographically by the extent of new bone formation at osteotomy space and absorbability was evaluated by measuring the area occupied by substitute at immediate postoperative, postoperative 6 months and 1 year.

Analysis of Knee Joint Line Obliquity after High Tibial Osteotomy.

The aim of this study was to evaluate which lower extremity alignment (knee and ankle joint) parameters affect knee joint line obliquity (KJLO) in the coronal plane after open wedge high tibial osteotomy (OWHTO). Overall, 69 knees of patients that underwent OWHTO were evaluated using radiographs obtained preoperatively and from 6 weeks to 3 months postoperatively. We measured multiple parameters of knee and ankle joint alignment (hip-knee-ankle angle [HKA], joint line height [JLH], posterior tibial slope [PS], femoral condyle-tibial plateau angle [FCTP], medial proximal tibial angle [MPTA], mechanical lateral distal femoral angle [mLDFA], KJLO, talar tilt angle [TTA], ankle joint obliquity [AJO], and the lateral distal tibial ground surface angle [LDTGA]; preoperative [-pre], postoperative [-post], and the difference between -pre and -post values [-Δ]).

Total Limb Rotation after Unilateral Total Knee Arthroplasty: Side-to-Side Discrepancy.

Total limb rotation, an important anatomical feature of the lower limb, is defined as any rotation of the lower limb on its longitudinal axis. The aim of the present study was to evaluate the discrepancies of rotational profiles of total limb between nonoperated and operated limb following unilateral total knee arthroplasty. We conducted an analysis of the computed tomography (CT) data from 32 patients undergoing primary unilateral total knee arthroplasty.

Outcome of Unicompartmental Knee Arthroplasty: A Systematic Review of Comparative Studies between Fixed and Mobile Bearings Focusing on Complications.

The purpose of this systematic review is to collate results of studies comparing fixed and mobile bearing unicompartmental knee arthroplasty (UKA), focusing on complications and timing for reoperations. Out of 723 results derived from PubMed, EMBASE and Cochrane database search engines on bearings in arthroplasty, 10 studies comparing clinical results of fixed bearings to mobile bearings in UKA were found eligible for analysis. The reoperation rate was calculated using a novel method such as reoperations per hundred component years, and the causes of specific reoperations were investigated.

Current status of second-look arthroscopy after meniscal allograft transplantation: review of the literature.

Introduction: Clinical assessments do not accurately reflect the status of meniscal transplants and cannot evaluate the graft condition itself and joint preservation effects of meniscal allograft transplantation correctly. The purpose of this review was to assess the need and to ascertain the indication and the role of second-look arthroscopy for objective evaluation after MAT.

Materials And Methods: We performed a literature search to identify all published clinical studies on MAT with the following medical subject heading (MeSH) terms: "meniscus," "meniscal transplant," "transplantation and allograft," "meniscal and transplant.

Advantage of minimal anterior knee pain and long-term survivorship of cemented single radius posterior-stabilized total knee arthroplasty without patella resurfacing.

Background: The single radius total knee prosthesis was introduced with the advantage of reduced patellar symptoms; however, there is no long-term follow-up study of the same. The purpose of this study was to determine the survival rate of single radius posterior-stabilized total knee arthroplasty and patellofemoral complication rates in a consecutive series.

Methods: Seventy-one patients (103 knees) who underwent arthroplasty without patellar resurfacing using a single radius posterior-stabilized total knee prosthesis were followed up for a minimum 10 years.

No difference in clinical and radiologic outcomes after total knee arthroplasty with a new ultra-congruent mobile bearing system and rotating platform mobile bearing systems after minimum 5-year follow-up.

We retrospectively compared the clinical and radiographic results between 76 primary total knee arthroplasties (TKAs) using the e.motion Ultra-Congruent prosthesis and 155 primary TKAs using the Low Contact Stress rotating platform. All patients had a minimum 5-year follow-up.

Time-dependent clinical results of rotating-platform total knee arthroplasty according to mechanical axis deviation.

Purpose: We hypothesized that the low contact stress (LCS) posterior stabilization system in knees with ≤3° deviation of coronal alignment would provide more favorable clinical outcomes and survival rate over the course of time.

Materials And Methods: A retrospective study was performed on 253 consecutive cases of primary total knee arthroplasty (TKA). Patients were classified according to the degree of deviation of coronal alignment on the initial postoperative radiograph as Group 1 (≤3° deviation) and Group 2 (>3° deviation).

High mortality and poor morbidity after hip fracture in patients with previous vertebral fractures.

Although vertebral fracture in patients is a predictor of subsequent hip fracture, no study has assessed the mortality and functional outcome in hip fracture patients with previous vertebral fracture. Between September 2009 and December 2012, we evaluated 246 patients over 50-years-of-age diagnosed with femoral neck or intertrochanteric fractures who underwent surgery. The patients were categorized into two groups and two subgroups.

Management of acute calcific tendinitis around the hip joint.

Background: Although the natural history of calcific tendinitis within the rotator cuff of the shoulder is established, the natural history of calcific tendinitis around the hip joint remains unknown.

Purpose: To examine the duration of symptoms including pain, the location of calcific tendinitis around the hip joint, the radiologic course of calcium phosphate crystals, and the proportion of patients who required surgical treatment.

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

The necessity of clinical application of tibial reduction for detection of underestimated posterolateral rotatory instability in combined posterior cruciate ligament and posterolateral corner deficient knee.

Purpose: The purpose of this study was to evaluate the usefulness of tibial reduction during dial test for clinical detection of underestimated posterolateral rotatory instability (PLRI) in combined posterior cruciate ligament (PCL)-posterolateral corner (PLC) deficient knee in terms of external rotation laxity and clinical outcomes.

Methods: Twenty-one patients who classified as grade I PLRI using dial test with subluxated tibia, but classified as grade II with tibial reduction evaluated retrospectively. The mean follow-up was 39.

National utilization of calcium supplements in patients with osteoporotic hip fracture in Korea.

Background: Calcium is prescribed worldwide for patients diagnosed with osteoporosis. However, the national utilization of calcium and compliance with calcium is unclear in Korea. Our purpose is to evaluate Korea's national utilization of calcium and compliance with calcium in patients with osteoporotic hip fracture from 2007 to 2010 using data from the Health Insurance Review and Assessment (HIRA) Service.

Combined reconstruction for posterolateral rotatory instability with anterior cruciate ligament injuries of the knee.

If posterolateral rotatory instability (PLRI) injury in patients with a torn anterior cruciate ligament (ACL) is not diagnosed and treated, ACL reconstruction can fail. We retrospectively evaluated the clinical outcome after reconstructions between 2002 and 2007 of both the ACL and the posterolateral corner (PLC) in 44 knees with combined ACL and PLC injuries. The median follow-up duration was 49 months (range, 24-68 months).

The influence of tibial positioning on the diagnostic accuracy of combined posterior cruciate ligament and posterolateral rotatory instability of the knee.

Background: To determine if tibial positioning affects the external rotation of the tibia in a dial test for posterolateral rotatory instability combined with posterior cruciate ligament (PCL) injuries.

Methods: Between April 2007 and October 2007, 16 patients with a PCL tear and posterolateral rotatory instability were diagnosed using a dial test. The thigh-foot angle was measured at both 30 degrees and 90 degrees of knee flexion with an external rotation stress applied to the tibia in 2 different positions (reduction and posterior subluxation).