کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
469065 698284 2016 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The study of wear behaviors on abducted hip joint prostheses by an alternate finite element approach
ترجمه فارسی عنوان
مطالعه رفتار سایش بر روی پروتز مفصل ران ربوده شده با روش المان محدود متناوب
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر علوم کامپیوتر (عمومی)
چکیده انگلیسی


• Wear behaviors of the total hip replacement (THR) with various abduction angles are investigated.
• The current finite element approach can improve the computational efforts without significant loss of data precision.
• The THR with larger abduction angles may produce deeper depth of wear but the volume of wear presents an opposite tendency.

An acetabular cup with larger abduction angles is able to affect the normal function of the cup seriously that may cause early failure of the total hip replacement (THR). Complexity of the finite element (FE) simulation in the wear analysis of the THR is usually concerned with the contact status, the computational effort, and the possible divergence of results, which become more difficult on THRs with larger cup abduction angles. In the study, we propose a FE approach with contact transformation that offers less computational effort. Related procedures, such as Lagrangian Multiplier, partitioned matrix inversion, detection of contact forces, continuity of contact surface, nodal area estimation, etc. are explained in this report. Through the transformed methodology, the computer round-off error is tremendously reduced and the embedded repetitive procedure can be processed precisely and quickly. Here, wear behaviors of THR with various abduction angles are investigated. The most commonly used combination, i.e., metal-on-polyethylene, is adopted in the current study where a cobalt-chromium femoral head is paired with an Ultra High Molecular Weight Polyethylene (UHMWPE) cup. In all illustrations, wear coefficients are estimated by self-averaging strategy with available experimental datum reported elsewhere. The results reveal that the THR with larger abduction angles may produce deeper depth of wear but the volume of wear presents an opposite tendency; these results are comparable with clinical and experimental reports. The current approach can be widely applied easily to fields such as the study of the wear behaviors on ante-version, impingement, and time-dependent behaviors of prostheses etc.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods and Programs in Biomedicine - Volume 131, July 2016, Pages 143–155
نویسندگان
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