Alternative Mechanical Evaluation Method for Ceramic Hip Joint Implants Utilizing Finite Element Analysis under in vivo-like Conditions

Title
Alternative Mechanical Evaluation Method for Ceramic Hip Joint Implants Utilizing Finite Element Analysis under in vivo-like Conditions
Authors
한성민추준욱송강일박성희최재봉박종웅최귀원윤인찬
Keywords
Total Hip Replacement; Ceramic Femoral Head; Finite Element Analysis; MEchanical Stability; In vivo-like Condition
Issue Date
2012-11
Publisher
Journal of Biomechanical Science and Engineering
Citation
VOL 7, NO 4, 336-348
Abstract
This study proposes an alternative mechanical simulation protocol for ceramic femoral heads under in vivo-like conditions. A 3D pelvis model is obtained from CT images and the finite elements of the implanted models are validated based on Kwong’s experimental results. The stress distribution of nine different femoral head models is then compared when using the conventional proof test (standard ISO 7206-10) and proposed test protocol (postoperative models). Both test methods show a decrease in the maximum stress when increasing the size of the femoral head and bore depth. However, for the stress distribution, the postoperative models reveal a concentration on the superior inner region of femoral head cranial, while the proof test shows an axisymmetric shape in the tangential direction. As a non-uniformed stress distribution increases the probability of fracture, the mechanical testing of ceramic femoral heads should be considered under in vivo-like conditions in order to improve the mechanical reliability of the joint. Thus, the current results show the necessity and viability of an alternative mechanical evaluation method for ceramic hip implants.
URI
https://pubs.kist.re.kr/handle/201004/44096
ISSN
18809863
Appears in Collections:
KIST Publication > Article
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