Biomechanical Analysis of Mandibular Implant-Assisted Removable Partial Denture with Distal Extension

Yung Chung Chen, Chi Lun Lin, Chen Han Yu, Hung Chih Chang, Yang Ming Lin, Jia Wei Lin

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)534-543
Number of pages10
JournalJournal of Medical and Biological Engineering
Volume42
Issue number4
DOIs
Publication statusPublished - 2022 Aug

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering

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