Patient-specific instrumentation does not improve accuracy in total knee arthroplasty.

Patient-specific instrumentation (PSI) has been introduced as a tool to increase the accuracy of total knee arthroplasty (TKA) compared with conventional instrumentation (CLI). However, previous studies have shown inconsistent results. The authors conducted a meta-analysis to compare the performance of PSI to CLI in TKA.

Incidence of retear with double-row versus single-row rotator cuff repair.

Rotator cuff tears have a high recurrence rate, even after arthroscopic rotator cuff repair. Although some biomechanical evidence suggests the superiority of the double-row vs the single-row technique, clinical findings regarding these methods have been controversial. The purpose of this study was to determine whether the double-row repair method results in a lower incidence of recurrent tearing compared with the single-row method.

Does immobilization after arthroscopic rotator cuff repair increase tendon healing? A systematic review and meta-analysis.

Introduction: To determine whether immobilization after arthroscopic rotator cuff repair improved tendon healing compared with early passive motion.

Materials And Methods: A systematic electronic literature search was conducted to identify randomized controlled trials (RCTs) comparing early passive motion with immobilization after arthroscopic rotator cuff repair. The primary outcome assessed was tendon healing in the repaired cuff.

[Problems and solutions in minimally invasive process of posterior discectomy for lumbar disc herniation].

Objective: To analyze the problems and complications of posterior discectomy for lumbar disc herniation.

Methods: From January 2005 to June 2010, 497 patients with lumbar disc herniation were treated by posterior discectomy, which data were analyzed retrospectively. There were 395 males and 102 females,ranging in age from 20 to 78 years with an average of 43.

[The first exploration of a minimally invasive lysis subcutaneouly for the treatment of gluteal muscle contracture based on relatively safe region around standard injection point of gluteal muscle].

Objective: To explore the solution of choosing the minimally invasive incision site for gluteal muscle contracture patient based on standard injection point of gluteal muscle.

Methods: from September 2008 to August 2010, 25 patients (14 males and 11 females with an average of 16.5 years, ranging from 12 to 26 years) with injected gluteal muscle contracture were prospectively studied.