Calcification of the Lateral Collateral Ligament of the Knee: A Case Report

Calcification most frequently occurs in the rotator cuff insertion of the shoulder. However, calcification is known to develop in any joint, including the hip, knee, wrist and elbow. Around the knee joint, it usually occurs in the areas such as the quadriceps femoris muscle, the popliteus muscle and the medial collateral ligament with a history of trauma. But the occurrence of calcification in the lateral collateral ligament is very rare. We herein report on one case of the calcification that developed in the lateral collateral ligament, and this was treated by excision of the calcified materials and repair of the ligament. We also present the magnetic resonance imaging findings of this case.

Total Knee Arthroplasty in an Adult with Neglected Patellar Dislocation: A Case Report

Both operative and non-operative intervention can be utilized in the treatment of neglected patellar dislocation in adults. Operative interventionsinclude patellectomy, lateral retinacular release, medial retinacular augmentation using tendon transfer, and distal realignment. Neglected patellar dislocation has been rarely reported in adults. We report a case of neglected patellar dislocation with degenerative osteoarthritis in a 56-year-old male patient who underwent total knee arthroplasty combined with lateral retinacular release, medial retinacular augmentation, and anteromedial transfer of the tibial tubercle for distal realignment.

The instrument-centering ability of four Nickel-Titanium instruments in simulated curved root canals / 대한치과보존학회지

The aim of this study was to evaluate the ability of newly marketed NRT instruments to maintain the original root canal configuration and curvature during preparation in comparison with the three existing instruments in simulated root canals. Simulated canals in resin blocks were prepared with ProFile, K3, ProTaper, and NRT instrument (n = 10 canals in each case). Pre- and post-operative images were recorded, and assessment of canal shape was completed with a computer image analysis program. The data were analyzed statistically using the One-way ANOVA followed by Duncan's test. The ability of instruments to remain centered in prepared canals at 1-, 2-mm levels was significantly better in ProFile groups than in other groups (p < 0.05). The change of centering ratio in NRT groups at 5-mm level was significantly greater than ProFile group and at 6- and 7-mm level than all other groups (p < 0.05). Although the NRT system was comparable to other systems in regards to its ability to maintain the canal configuration of apical portion, this system was more influenced by the mid-root curvature due to its stainless-steel files for coronal preflaring.