Primary Cementless Total Hip Arthroplasty with a Sandwich Type in Ceramic-Ceramic Articulation (Minimum 10-Year Follow up Results)

PURPOSE: To evaluate the minimum 10-year follow up results of primary total hip arthroplasty (THA) performed using a sandwich-type (alumina-polyethylene-titanium) ceramic bearing. MATERIALS AND METHODS: Thirty four patients (40 hips) who underwent a THA with sandwich typed liners from November 1998 to December 2000 were analyzed. Among the 34 patients, 25 were men and nine were women. Mean follow-up was 134 months (range, 120~145 months) and mean patient age at the time of THA was 47.1 years (range, 24~65 years). The clinical results were evaluated using the Harris hip score and level of thigh pain with a limping gait. The radiographic evaluation was done in terms of the endosteal new bone formation, radiolucent line, subsidence of the stem, migration of the acetabular cup, and proof of loosening. RESULTS: The mean preoperative Harris hip score of 50.2 points (range, 31~87 points) was improved to 90.9 points (range, 75~99 points) at the final follow-up and thigh pain with limping gait in one case. All cases had fixation by bony ingrowth. No radiographically detectable loosening was observed in any hip. Fracture of ceramic liner in one case required change of the polyethylene liner. CONCLUSION: At the minimum 10-year follow up, survival rate as the end-point was favorable. However, fracture of the ceramic is still a major problem. Satisfactory results can be obtained by more precise surgical technique for acerabular inclincation and anteversion, and by improving the quality of the ceramic.

Enchondroma of the Calcaneus: A Case Report / 대한골관절종양학회지

Enchondroma is a benign tumor mainly developed in the hand and uncommon in the foot. Even if it is in the foot, most are in the phalanges and distal metatarsals of the foot. Enchondroma in the calcaneus is very rare. A 44-year-old male suffered from left heel pain for several months, authors treated it with curettage and bone graft, it was histologically confirmed as an enchondroma in the calcaneus. The authors presented a rare case presentation of an enchondroma in the calcaneus with pain.

Analysis of the Causes for Failed Compression Hip Screws in Femoral Intertrochanteric Fracture and Hip Reconstruction Operation

PURPOSE: To analyze the causes of fixation failure of compression hip screw and evaluate outcomes of hip arthroplasty for reconstruction. MATERIALS AND METHODS: We reviewed 108 femoral intertrochanteric fractures that underwent compression hip screw between January 1997 and December 2007. Failure group (group I) contained 28 cases who had hip arthroplasty for failed compression hip screw and the control group (group II) contained 80 cases who had successive compression hip screw. We analyzed the causes of failure of compression hip screw and evaluated the results of hip arthroplasty for reconstruction. RESULTS: In group I, 21 cases (75%) were unstable fractures. Group II, 14 cases (17%) were unstable fractures. Tip-apex distance was 26.5 (18~35) mm in group I and 18.6 (8~22) mm in group II. Lateral wall fracture of greater trochanteric area was combined in 24 cases (85.7%) in group I and 9 cases (11.3%) in group II. Harris Hip Score improved from 33.5 (22~43) points to 84.2 (75~93) points after salvage hip arthroplasty. CONCLUSION: We considered the causes of failed compression hip screw to be fracture instability, increased tip-apex distance and presence of lateral wall fracture of greater trochanter. Hip arthroplasty was found to be a useful method for failed compression hip screw.