Ultrasonic Technique for Contact Mechanism Estimation of an Artificial Hip Joint.

Oda, Masafumi; Sekiguchi, Yukio; Hara, Toshiaki

doi:10.5136/lifesupport.10.111

Cited by 1 publication

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“…Therefore, experimental methods external to the living body have been suggested, and such research has been conducted. For example, evaluation of the contact mechanism using ultrasonic waves between the femoral head and the acetabular cup has been conducted using a THR model that considers the physiological conditions (12) , and research based on radiographs of the condition of installed cups (13) and measurement of the condition of removed cups (14)- (16) have also been conducted.…”

Section: Introductionmentioning

confidence: 99%

Displacement and Stress Analysis around the Artificial Acetabular Cup in a Total Hip Replacement

Kakunai

Tachibana

Sakamoto

et al. 2007

JMMP

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In order to improve the service life of the artificial acetabular cup in a total hip replacement, it is important to determine the best material and design, and to assess the mechanical behavior around the cup. In this study, electronic speckle interferometry (ESPI) and the two-dimensional finite element method (FEM) are employed to investigate the mechanical behavior. The influence of the cancellous bone and cup thickness on mechanical behavior around the cup was investigated. Good agreement of the cup model was found between the ESPI measurements and FEM predictions. The following results were obtained. (1) Cancellous bone with a porous structure can be measured by the ESPI method. (2) There are discontinuities of the displacement distribution in the transverse direction in each boundary region of the cup, bone cement and cancellous bone. (3) The maximum shear stress exists in the boundary region of the cup and bone cement.

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Section: Introductionmentioning

confidence: 99%