کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4080877 1267570 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Compared fixation and survival of 280 lateralised vs 527 standard cementless stems after two years (1–7)
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ارتوپدی، پزشکی ورزشی و توانبخشی
پیش نمایش صفحه اول مقاله
Compared fixation and survival of 280 lateralised vs 527 standard cementless stems after two years (1–7)
چکیده انگلیسی

BackgroundRestoring the native hip anatomy increases hip prosthesis survival, whereas increased femoral lateralisation creates high torque stresses that may alter prosthesis fixation. After finding lucent lines around cementless lateralised stems (Corail™, DePuy Synthes, St Priest, France) in several patients, we evaluated the effects of lateralisation in a large case-series. The objective of our study was to compare lateralised vs standard stems of identical design in terms of radiological osteo-integration and survival.HypothesisLateralised stems, despite being used only when indicated by the anatomical parameters, carry a higher risk of impaired osteo-integration.Materials and methodsA retrospective study was conducted in 807 primary total hip arthroplasties (THAs) performed between 2006 and 2010 in 798 patients with a mean age of 65 ± 14.2 years. Lateralised stems were used in 280 cases (Corail High Offset KHO, n = 169; and Corail coxa vara KLA, n = 111 cases) and standard stems in 527 cases (Corail KA). Mean follow-up was 2.3 years (range, 1–7 years). The clinical evaluation included determination of the Postel-Merle d’Aubigné (PMA) score. Bone fixation and stability of the implants were assessed by determining the Engh and Massin score and the ARA score on the radiographs at last follow-up. Femoral, acetabular and global offset values were determined before and after THA. Nobles's Canal Flare Index was computed. Survival was estimated using the Kaplan-Meier method with surgical revision for aseptic loosening as the end-point.ResultsThe PMA score improved from 12 (10–15) pre-operatively to 17.7 (14–18) (P < 0.05). After THA, in the lateralised stem group, femoral offset was restored in 217 (77%) hips and the mean change vs the pre-operative offset value was −2 mm; in the standard stem group, femoral offset was restored in 440 (83.5%) hips and the mean change was +1 mm. The Engh and Massin score values were similar in the standard stem and lateralised stem groups (24.4 ± 2.2 and 22.6 ± 2.4, respectively, NS). Revision for aseptic loosening was required in 5 patients with lateralised stems (3 KHO and 2 KLA) versus none of the patients with standard stems. There were no cases of excessive femoral offset and the mean change in offset was −2.3 mm (−5.3 to −1.1). Noble's index was increased (4.27 ± 0.5 for the loosened lateralised stems, 3.65 ± 0.8 for the well-fixed lateralised stems and 3.82 ± 0.6 for the standard stems), with no significant difference across groups. Overall survival after 3.5 years of follow-up was 94.6% (95% confidence interval, 88.4–100%) with lateralised stems and 100% with standard stems (P < 0.05).DiscussionThe risk of aseptic loosening was significantly higher with the lateralised stem (5/280, 1.8%) than with the standard stem (n = 0). Our findings indicate a need for careful preparation to obtain primary fixation of lateralised stems.Level of evidenceIII, retrospective case-control study.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Orthopaedics & Traumatology: Surgery & Research - Volume 101, Issue 7, November 2015, Pages 775–780
نویسندگان
, , , , ,