TY - JOUR
T1 - Biomechanical Analysis of Mandibular Implant-Assisted Removable Partial Denture with Distal Extension
AU - Chen, Yung Chung
AU - Lin, Chi Lun
AU - Yu, Chen Han
AU - Chang, Hung Chih
AU - Lin, Yang Ming
AU - Lin, Jia Wei
N1 - Funding Information:
This work was supported by the Ministry of Science and Technology, Taiwan (Grant number 07-2221-E-006-052-MY2).
Publisher Copyright:
© 2022, Taiwanese Society of Biomedical Engineering.
PY - 2022/8
Y1 - 2022/8
N2 - Purpose: This study aimed to evaluate the mechanical performance of mandibular implant-assisted removable partial dentures (IARPDs) on abutment teeth, supporting implants, and the mucosa. A risk assessment of patient discomfort and complications was also conducted to provide a design reference for clinical use. Methods: Mandibular IARPDs with distal extension were analyzed using the finite element method. The mechanical performance of IARPDs was evaluated for varying numbers of missing teeth, crown-to-root ratios of abutment teeth, and locations of occlusal rests. Results: When an implant was placed at the distal end, the peak von Mises stress in the cortical bone surrounding the abutment tooth was 14.8% lower than that when at the mesial end. Simultaneously, the peak von Mises stress was reduced by 76.7% over the mucosa and increased by 206.7% in the cortical bone surrounding the implant. The use of distal occlusal rests increased the peak von Mises stresses in the cortical bone surrounding the abutment tooth by 8.4% compared to that when using mesial occlusal rests. When the crown-to-root ratio of the abutment tooth increased from 1 to 1.5, the peak von Mises stress in the cortical bone surrounding the abutment tooth increased by 168.7%. Conclusion: An IARPD with a distal implant can reduce the risk of post-op complications. When the crown-to-root ratio of the abutment tooth is adequate, the distal occlusal rest can be used for IARPDs of distal free ends.
AB - Purpose: This study aimed to evaluate the mechanical performance of mandibular implant-assisted removable partial dentures (IARPDs) on abutment teeth, supporting implants, and the mucosa. A risk assessment of patient discomfort and complications was also conducted to provide a design reference for clinical use. Methods: Mandibular IARPDs with distal extension were analyzed using the finite element method. The mechanical performance of IARPDs was evaluated for varying numbers of missing teeth, crown-to-root ratios of abutment teeth, and locations of occlusal rests. Results: When an implant was placed at the distal end, the peak von Mises stress in the cortical bone surrounding the abutment tooth was 14.8% lower than that when at the mesial end. Simultaneously, the peak von Mises stress was reduced by 76.7% over the mucosa and increased by 206.7% in the cortical bone surrounding the implant. The use of distal occlusal rests increased the peak von Mises stresses in the cortical bone surrounding the abutment tooth by 8.4% compared to that when using mesial occlusal rests. When the crown-to-root ratio of the abutment tooth increased from 1 to 1.5, the peak von Mises stress in the cortical bone surrounding the abutment tooth increased by 168.7%. Conclusion: An IARPD with a distal implant can reduce the risk of post-op complications. When the crown-to-root ratio of the abutment tooth is adequate, the distal occlusal rest can be used for IARPDs of distal free ends.
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U2 - 10.1007/s40846-022-00738-z
DO - 10.1007/s40846-022-00738-z
M3 - Article
AN - SCOPUS:85134543611
SN - 1609-0985
VL - 42
SP - 534
EP - 543
JO - Journal of Medical and Biological Engineering
JF - Journal of Medical and Biological Engineering
IS - 4
ER -