Comparison of complete distal release of the medial collateral ligament and medial epicondylar osteotomy during ligament balancing in varus knee total knee arthroplasty.

Background: During ligament balancing for severe medial contracture in varus knee total knee arthroplasty (TKA), complete distal release of the medial collateral ligament (MCL) or a medial epicondylar osteotomy can be necessary if a large amount of correction is needed.

Methods: This study retrospectively reviewed 9 cases of complete distal release of the MCL and 11 cases of medial epicondylar osteotomy which were used to correct severe medial contracture. The mean follow-up periods were 46.

Foot drop secondary to peroneal intraneural cyst arising from tibiofibular joint.

Unlabelled: An 11-year-old boy presented to our outpatient clinic with a three-month history of pain over the fibular head area and gait difficulty. Surgical exploration revealed a mass arising from the superior tibiofibular joint invading the peroneal nerve along the articular branch of the common peroneal nerve. The pathogenesis of the intraneural ganglion of the peroneal nerve may be an articular origin and superior tibiofibular joint is the central point.

Relationship between Tibial Bone Defect and Extent of Medial Release in Total Knee Arthroplasty.

Purpose: To understand the relationship between tibial bone defect and extent of medial release in total knee arthroplasty.

Materials And Methods: We evaluated 32 knees in 22 patients with variable degrees of tibial bone defect on medial plateau has undergone total knee arthroplasty. In this study, 31 cases had been diagnosed as degenerative osteoarthritis and 1 case was osteonecrosis.

Comparative analysis of femoral tunnels between outside-in and transtibial double-bundle anterior cruciate ligament reconstruction: a 3-dimensional computed tomography study.

Purpose: The objectives of this study were (1) to compare locations of the femoral tunnels created by outside-in and transtibial techniques and the reference data and (2) to compare the diameter of the tunnel entrance based on the real reaming size.

Methods: A comparative study was performed with 20 outside-in and 22 transtibial double-bundle anterior cruciate ligament reconstruction patients. Computed tomography scans of the operated knees of the outside-in and transtibial groups were performed at 1.

Specific compartmental analysis of cartilage status in double-bundle ACL reconstruction patients: a comparative study using pre- and postoperative MR images.

Purpose: The purpose of this study was to evaluate the changes in the site-specific cartilage status after a double-bundle ACL reconstruction using preoperative and follow-up MR images.

Methods: Thirty-six knees that underwent a double-bundle ACL reconstruction from 2001 to 2009 with the available preoperative and follow-up magnetic resonance imaging were included. Patients with a meniscal injury were compared with those without a meniscal injury.

A Comparison of the Clinical and Radiographic Results of Press Fit Condylar Rotating-Platform High-Flexion and Low Contact Stress Mobile Bearing Prosthesis in Total Knee Arthroplasty: Short term Results.

Purpose: This study compared the results of rotating-platform high-flexion (RP-F) total knee arthroplasty with low contact stress (LCS) for clinical and radiographical assessment after a short-term period.

Materials And Methods: 68 total knee arthroplasties using a RP-F and LCS system were analyzed retrospectively. Thirty-five of the 68 were osteoarthritic knees and were followed-up for more than 2 years.

Delayed knee locking after complicated anterior cruciate ligament reconstruction despite good stability using a bio-transfix.

We describe a case of delayed cyst formation that presented as intermittent knee locking after complicated anterior cruciate ligament (ACL) reconstruction using a Bio-TransFix implant in a 21-year-old male patient. During femoral fixation, we could not pull out the guide wire that was temporarily used for the femoral fixation. However, stability was good, and the guide wire was not removed.

Surgical treatment of habitual patella dislocation with genu valgum.

Habitual dislocation of patella is a rare disorder. Sometimes it is associated with angular deformity such as genu valgum. We experienced habitual patella dislocation associated with genu valgum that was treated with corrective osteotomy of distal femur and soft tissue realignment procedure including lateral release and medial reefing.

Analysis of tunnel widening after double-bundle ACL reconstruction.

Purpose: The purpose of this study was to evaluate the tunnel widening using a multi-planar reformation of MRI (Magnetic Resonance Imaging) in the orientation of the tunnel. The hypotheses of this study were as follows: (1) tunnel widening would be reduced with the above-mentioned technique, (2) the degree of tunnel widening would be different at the site of the tunnels, and (3) the time interval from surgery to MRI acquisition would affect the magnitude of tunnel widening.

Methods: Forty double-bundle ACL reconstructed patients who underwent postoperative MRI were enrolled in this study.

Effect of weight-bearing on the alignment after open wedge high tibial osteotomy.

This study examined the changes in knee alignment after an open wedge high tibial osteotomy before and after weight-bearing. From 2004 to 2006, 36 high tibial osteotomies were performed to treat unicompartmental arthritis with a varus deformity. Thirteen patients without instability and with an accurate radiographic evaluation were included.

The use of medulloscopy for localized intramedullary lesions: review of 5 cases.

We report 5 cases of a localized lesion (4 with osteomyelitis and 1 with an intraosseous ganglion cyst) that were treated successfully by medulloscopy. Medulloscopy is a standard arthroscopic technique for visualizing the intramedullary canal of the tibia. Two portals were created to allow easy access and triangulation to the lesion, one for the 5-mm arthroscope and the other for the instrument.

Utility of preoperative distractive stress radiograph for beginners to extent of medial release in total knee arthroplasty.

Background: This study evaluated the preoperative distractive stress radiographs in order to quantify and predict the extent of medial release according to the degree of varus deformity in primary total knee arthroplasty.

Methods: We evaluated 120 varus, osteoarthritic knee joints (75 patients). The association of the angle on the distractive stress radiograph with extent of medial release was analyzed.

Comparative biomechanical study of the Ligament Plate and other fixation devices in ACL reconstruction.

The objective of this study was to evaluate and compare the biomechanical properties of the Ligament Plate with other femoral fixation devices. The Ligament Plate and three different femoral fixation devices were used in fixation of 60 porcine femora and harvested porcine tendons. For each fixation device, a porcine graft-tendon complex was used for the simple load-to-failure test and the load-to-failure test after a cyclic loading test, and the maximal failure load was measured.

Knee arthrodesis in failed total knee arthroplasty with severe osteolysis and ipsilateral long-stem total hip arthroplasty.

We report a case of knee fusion after a failed total knee arthroplasty (TKA) with severe osteolysis including the epicondyle and ipsilateral total hip arthroplasty (THA) with long Wagner revision stem (Sulzer Orthopedics, Baar, Switzerland). The conventional devices for arthrodesis were unavailable in this case because of the long Wagner revision stem and poor bone stock. A connector was made between the long Wagner revision stem and an intramedullary nail (IM nail; Solco, Seoul, Korea).

Delayed intra-articular inflammatory reaction due to poly-L-lactide bioabsorbable interference screw used in anterior cruciate ligament reconstruction.

Bioabsorbable interference screws have replaced metal interference screws in anterior cruciate ligament reconstruction surgery because they have several advantages. Poly-L-lactide (PLLA) is one of the commonly used materials for bioabsorbable interference screws. PLLA produces a lower inflammatory reaction than polyglycolide as a result of its slower degradation rate and better biocompatibility.

New posteromedial portal for ankle arthroscopy.

We describe a new posteromedial portal through the bed of the posterior tibial tendon. It can be made easily with a 0.5-inch posteromedial skin incision along the course of the posterior tibial tendon just behind the posterior colliculus of the medial malleolus.