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On-line Access: 2022-01-27
Received: 2021-08-17
Revision Accepted: 2021-10-24
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Structural optimization of patient-specific temporomandibular joint replacement implants for additive manufacturing: novel metrics for safety evaluation and biomechanical performance
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Manuel Pinheiro, Anouar Krairi, Robin Willaert, Maria C. Costa & Wim Van Paepegem . Structural optimization of patient-specific temporomandibular joint replacement implants for additive manufacturing: novel metrics for safety evaluation and biomechanical performance[J]. Journal of Zhejiang University Science D, 2022, 5(2): 333-347.
@article{title="Structural optimization of patient-specific temporomandibular joint replacement implants for additive manufacturing: novel metrics for safety evaluation and biomechanical performance",
author="Manuel Pinheiro, Anouar Krairi, Robin Willaert, Maria C. Costa & Wim Van Paepegem ",
journal="Journal of Zhejiang University Science D",
volume="5",
number="2",
pages="333-347",
year="2022",
publisher="Zhejiang University Press & Springer",
doi="10.1007/s42242-021-00174-z"
}
%0 Journal Article
%T Structural optimization of patient-specific temporomandibular joint replacement implants for additive manufacturing: novel metrics for safety evaluation and biomechanical performance
%A Manuel Pinheiro
%A Anouar Krairi
%A Robin Willaert
%A Maria C. Costa & Wim Van Paepegem
%J Journal of Zhejiang University SCIENCE D
%V 5
%N 2
%P 333-347
%@ 1869-1951
%D 2022
%I Zhejiang University Press & Springer
%DOI 10.1007/s42242-021-00174-z
TY - JOUR
T1 - Structural optimization of patient-specific temporomandibular joint replacement implants for additive manufacturing: novel metrics for safety evaluation and biomechanical performance
A1 - Manuel Pinheiro
A1 - Anouar Krairi
A1 - Robin Willaert
A1 - Maria C. Costa & Wim Van Paepegem
J0 - Journal of Zhejiang University Science D
VL - 5
IS - 2
SP - 333
EP - 347
%@ 1869-1951
Y1 - 2022
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1007/s42242-021-00174-z
Abstract: Total temporomandibular joint (TMJ) replacement is recommended only when there is irreversible damage to the joint and no conservative treatment can provide functional improvements. Several stock and custom-made TMJ implants have been made available; however, retrospective and comparative studies were unable to find significant differences between the two types of solutions. The introduction of additive manufacturing (AM) techniques in medical practice allows for a greater freedom of design and a higher degree of device customisation. The combination of AM with structural optimisation may streamline development and provide the key for fabricating biomechanically enhanced TMJ implants. In this study, structural optimisation techniques were applied to develop and numerically validate a patient-specific TMJ implant. The biomechanical behaviour of each intermediate TMJ design was assessed under four different nominal and maximum biting tasks using finite element analyses. In addition, a new set of metrics were proposed to compare each design regarding biomechanical performance and implant safety. The results suggest that 5582% of the natural/intact strain patterns can be recovered with the finally selected TMJ implant. This represents an increase of 15% in biomechanical performance for incisor biting, 15% for right molar biting, 17% for left molar biting and a decrease of 2% for left group biting compared with the initial design. The results also suggest that load transfer at the proximal ramus reduces the implants impact on the mandibles strain patterns. Finally, structural optimisation allows for a volume reduction of up to 44% with a minimum loss of implant safety and biomechanical performance.
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