ABSTRACT
OBJECTIVES: To determine whether kinds of implants would influence on the radiologic outcomes in the treatment of unstable osteoporotic intertrochanteric fractures. MATERIALS AND METHODS: In this retrospective study, radiologic outcomes of 151 patients with unstable osteoporotic intertrochanteric fractures undergoing surgical treatments were compared based on the types of fixation implants as follows : PFNA (53 cases, group I), gamma nail 3(31 cases, group II), CHS with TSP (43 cases, group III), and helical blade type LCP-DHS with TSP (24 cases, group IV). On the follow-up radiographs after operations, we assessed differences of bone union durations, neck-shaft ankle changes, lag screw or helical blade slippages, and varus alpha angle changes among the study groups. RESULTS: All the radiologic outcomes evaluated in this study were not significantly different among the study groups. The average bone union durations of the group I, II, III and IV were 17.7, 18.0, 18.2, and 17.8 weeks, respectively (P=0.429). The average variation of neck-shaft angle of the group I, II, III and IV were 3.6degrees, 3.1degrees, 3.7degrees and 2.9degrees, respectively (P=0.273). The average lag screw or blade slippage of the group I, II, III and IV were 5.1 mm, 3.3 mm, 3.6 mm and 2.7 mm, respectively (P=0.154). The average variation of varus alpha of the group I, II, III and IV were 5.3degrees, 4.7degrees, 4.1degrees and 4.6masculine, respectively (P=0.894). CONCLUSIONS: This study indicates that four typical types of fixation implants for treating unstable osteoporotic intertrochanteric fractures would not lead to differences in postoperative radiological outcomes.
Subject(s)
Animals , Humans , Ankle , Follow-Up Studies , Hip Fractures , Nails , Retrospective StudiesABSTRACT
PURPOSES: To compare the radiologic results in the minimally invasive quadriceps sparing total knee arthroplasty(MIS-QS TKA) with those in conventional total knee arthroplasty(TKA). MATERIALS AND METHODS: Between June 2004 and December 2004, we underwent 20 MIS-QS TKAs (group I) and 20 conventional TKAs(group II). All cases were female with osteoarthritis. The average age was 68.0 years in group I and 65.0 years in group II. The mechanical axis and the implant position were measured by 2 observers according to the reontgenographic evaluation system of the American Knee Society. RESULTS: The mean length of skin incision was 9.2 cm in group I and 16.1 cm in group II. The mean operative time was 127 minutes in group I and 85 minutes in group II. The mean postoperative mechanical axis was varus 1.35 degrees in group I and varus 0.37 degrees in group II. And the mean alpha, beta, gamma and delta angle were 94.9, 90.6, 4.5 and 85.5 degrees in group I, and 94.3, 91.4, 4.7 and 84.6 degrees in group II, respectively. There was no significant difference in the radiologic results between both groups. CONCLUSIONS: There was no significant difference in the implant position and mechanical axis between MIS-QS TKA group and conventional TKA group. Average skin incision was shorter in MIS-QS TKA, but longer operation time taken compared to that of conventional TKA.