Implant stability in revision total hip arthroplasty

Chassin, Eric P.; Silverton, Craig D.; Berzins, Aivars; Rosenberg, Aaron G.

doi:10.1016/s0883-5403(97)90155-8

Cited by 21 publications

(1 citation statement)

References 7 publications

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“…There were several techniques to investigate the stability of the fixed proximal femur after the ETO, including clinical postoperative assessment [8,11-14], imaging studies [15-17], computational model analysis [18], and biomechanical tests [4,5,19-21]. Imaging studies has been widely used to measure the in-vivo displacement of the fragments.…”

Section: Introductionmentioning

confidence: 99%

An in-vitro biomechanical study of different fixation techniques for the extended trochanteric osteotomy in revision THA

et al. 2013

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BackgroundThe wire fixation and the cable grip fixation have been developed for the extended trochanteric osteotomy (ETO) in the revision of total hip arthroplasty (THA). Many studies reported the postoperative performance of the patients, but with little quantitative biomechanical comparison of the two fixation systems.MethodsAn in-vitro testing approach was designed to record the loosening between the femoral bed and the greater trochanter after fixations. Ten cadaveric femurs were chosen in this study. Each femur underwent the THA, revision by ETO and fixations. The tension to the greater trochanter was from 0 to 500N in vertical and lateral direction, respectively. The translation and rotation of the greater trochanter with respect to the bony bed were captured by an optical tracking system.ResultsIn the vertical tension tests, the overall translation of the greater trochanter was observed 0.4 mm in the cable fixations and 7.0 mm in the wire fixations. In the lateral tension tests, the overall motion of the greater trochanter was 2.0 mm and 1.2° in the cable fixations, while it was 6.2 mm and 5.3° in the wire fixations. The result was significantly different between the two fixation systems.ConclusionsThe stability of the proximal femur after ETO using different fixations in the revision THA was investigated. The cable grip fixation was significantly more stable than the wire fixation.

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