کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4061288 1604027 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Bilateral Patellar Component Shear Failure of Highly Cross-Linked Polyethylene Components : Report of a Case and Laboratory Analysis of Failure Mechanisms
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی ارتوپدی، پزشکی ورزشی و توانبخشی
پیش نمایش صفحه اول مقاله
Bilateral Patellar Component Shear Failure of Highly Cross-Linked Polyethylene Components : Report of a Case and Laboratory Analysis of Failure Mechanisms
چکیده انگلیسی

A case of bilateral patellar component failure due to fatigue fracture of the all-polyethylene fixation pegs in a highly cross-linked ultra–high-molecular-weight polyethylene design is presented. To recreate this failure mode, a novel test method was developed to investigate the effects of peg orientation and cement technique on patella fatigue strength under cyclic compression and shear loading. Patellar peg orientation had a minor effect on shear strength, whereas lack of cement in the backside patellar groove had a substantial effect. The shear fatigue strength exceeded in vivo force estimates when the patellar groove was fully cemented. The test results and retrieval analysis suggest that high activity level and inadequate cement fixation of the patellar component may contribute to all-polyethylene patellar component peg fractures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Arthroplasty - Volume 27, Issue 5, May 2012, Pages 789–796
نویسندگان
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