Platelet-derived growth factor-BB-immobilized asymmetrically porous membrane for enhanced rotator cuff tendon healing.

Rotator cuff tear is a common musculoskeletal disease that often requires surgical repair. Despite of recent advances in surgical techniques, the re-tear rate of the rotator cuff tendon is very high. In this study, a platelet-derived growth factor-BB (PDGF-BB)-immobilized asymmetrically porous membrane was fabricated to investigate the feasibility for enhancing rotator cuff tendon regeneration through the membrane.

Antibiotic-eluting hydrophilized PMMA bone cement with prolonged bactericidal effect for the treatment of osteomyelitis.

Osteomyelitis is still considered to be one of the major challenges for orthopedic surgeons despite advanced antiseptic surgical procedures and pharmaceutical therapeutics. In this study, hydrophilized poly(methyl methacrylate) (PMMA) bone cements containing Pluronic F68 (EG79PG28EG79) as a hydrophilic additive and vancomycin (F68-VAcements) were prepared to allow the sustained release of the antibiotic for adequate periods of time without any significant loss of mechanical properties. The compressive strengths of the bone cements with Pluronic F68 compositions less than 7 wt% were not significantly different compared with the control vancomycin-loaded bone cement (VAcement).

Outcome analysis of arthroscopic treatment of partial thickness rotator cuff tears.

Background: Partial thickness rotator cuff tears occupy an important position in the spectrum of rotator cuff disease. The development of a more comprehensive classification has been sought to address both the tear location and extent, which may influence clinical results. The purpose of this study is to classify partial thickness rotator cuff tears according to the arthroscopic findings and to evaluate the clinical outcomes after arthroscopic repair of partial thickness tears.

Influence of bundle diameter and attachment point on kinematic behavior in double bundle anterior cruciate ligament reconstruction using computational model.

A protocol to choose the graft diameter attachment point of each bundle has not yet been determined since they are usually dependent on a surgeon's preference. Therefore, the influence of bundle diameters and attachment points on the kinematics of the knee joint needs to be quantitatively analyzed. A three-dimensional knee model was reconstructed with computed tomography images of a 26-year-old man.

Arthroscopic treatment of an anterior cruciate ligament avulsion fracture in a skeletally immature patient.

Anterior cruciate ligament injuries in skeletally immature patients usually involve tibial bony avulsion fractures rather than the midsubstance tears usually observed in adults. Several surgical techniques have been reported to provide stable fixation and avoid physeal injury in this pediatric population. The authors propose a novel, reproducible surgical technique using bioabsorbable anchors to obtain biomechanical stability and minimal physeal or articular cartilage damage.

Arthroscopic repair of medial patellofemoral ligament avulsion in acute patellar dislocation in skeletally immature patient--a case report.

Acute patellar dislocation is a severe injury to the knee and usually manifests with symptoms such as giving way, a sensation of lateral displacement of the patella accompanied by hemarthrosis and tenderness over the medial epicondylar region to palpation. Spontaneous reduction of the patella makes the diagnosis more difficult in initial evaluation. Radiographs often show a small bony avulsion at the medial border of the patella, which may represent an injury to the medial restraints.

Medial and lateral segond fractures in a skeletally immature patient: a radiographic marker for the multiply injured knee.

Marginal fractures of the medial tibial plateau have been reported in the literature as a secondary type of Segond fracture. Some reports described this entity in the setting of combined injuries such as root avulsions of the medial meniscus, complete disruption of the posterior cruciate ligament (PCL), partial tear of the anterior cruciate ligament (ACL), and tears of the medial meniscus and medial collateral ligament. It has been postulated that medial marginal fractures are secondary to compression of the medial aspect of the femoral condyle and tibial plateau with a corresponding posterolateral corner injury.

Arthroscopic treatment of a PCL avulsion fracture in a skeletally immature patient.

Posterior cruciate ligament (PCL) avulsions from the tibial attachment site in children are rare. Six cases have been reported in the English literature since 1975. Osteochondral avulsions of the PCL can be easily missed on plain radiographs in skeletally immature patients because of the rarity of these injuries and open proximal tibial physis.

Modified arthroscopic double row repair of partial thickness tear of the rotator Cuff involving articular and bursal side.

Partial thickness of rotator cuff tears is considered as a common cause of shoulder disability. Various techniques for arthroscopic repair of partial thickness tear of rotator cuff have been reported in the literature. These techniques have addressed the articular side partial thickness cuff tear.

Analysis of biomechanical effect of stem-end design in revision TKA using Digital Korean model.

Background: The stem-end pain after revision total knee arthroplasty has been clinically reported around the diaphyseal region of the tibia, and the stem-end design has been recognized as one of the causes of the stem-end pain. But there are few reports about the biomechanical characteristics of different stem-end designs on revision total knee arthroplasty. The objective of this study is to investigate the biomechanical effect of the stem-end design in revision total knee arthroplasty.

Cross-pin femoral fixation for hamstring posterior cruciate ligament reconstruction.

We describe a new technique, cross-pin femoral fixation, for reconstruction of the posterior cruciate ligament using a quadruple hamstring tendon. The femoral tunnel is made in an inside-out manner via an anterolateral portal. Two cross pins are introduced from the medial aspect of the medial femoral condyle using the cross-pin guide, which is placed in the femoral tunnel.