Influence of mandibular free-end partial edentulism on the force exerted on maxillary anterior teeth
Influence of mandibular free-end partial edentulism on the force exerted on maxillary anterior teeth
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DOI：
10.1016/j.jpor.2019.12.004
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发表时间：
2020-10-01
影响因子：
3.6
通讯作者：
Ikebe, Kazunori
中科院分区：
文献类型：
--
作者：
Arita, Shuhei;Gonda, Tomoya;Ikebe, Kazunori
目的：本研究的目的是确定下颌游离端部分无牙颌畸形和部分无牙颌区域佩戴可摘局部义齿对上颌前牙施加的力的影响。方法：使用市售的可换牙颌模型。建立了7个下颌游离端无牙颌的实验条件，并制作了远中可摘局部义齿来替代缺失的后牙。在左上颌中切牙、尖牙、第一前磨牙和第一磨牙的根面贴有应变片，根据校准系数计算施加在它们上的力。施加49 N的咬合载荷，并与Kruskal-Wallis试验进行比较（P < 0.05）。结果：随着剩余牙齿数量的减少，施加在上颌前牙上的力显着增加。使用可摘局部义齿后，上颌前牙受力显着降低。结论：下颌游离端局部无牙颌剩余牙数减少时，上颌前牙的负担增加。我们的研究结果表明，对于下颌游离端局部缺齿的患者，佩戴可摘局部义齿可以通过减少过度压力来有效保留剩余牙齿。 (C) 2019 年日本口腔修复学会。由爱思唯尔有限公司出版。保留所有权利。
Purpose: The purpose of this study was to determine the influence of mandibular free-end partial edentulism and the wearing of removable partial dentures in the partially edentulous area on the force exerted on maxillary anterior teeth.Methods: A commercially available jaw model with exchangeable teeth was used. Seven experimental conditions of mandibular free-end edentulism were set up and a distal extension removable partial denture to replace missing posterior teeth was fabricated. Strain gauges were attached to the root surface of the maxillary left central incisor, canine, first premolar and first molar, and the force exerted on them was calculated based on the calibration coefficient. An occlusal load of 49 N was applied and the forces were compared with the Kruskal-Wallis test (P < 0.05).Results: The force exerted on the maxillary anterior teeth increased significantly as the number of remaining teeth decreased. The force exerted on the maxillary anterior teeth decreased significantly with use of a removable partial denture.Conclusions: When the number of remaining teeth decreases in mandibular free-end partial edentulism, the burden on the maxillary anterior teeth increases. Our findings suggest that for patients with mandibular free-end partial edentulism, wearing a removable partial denture is effective in preserving the remaining teeth by reducing excessive stress. (C) 2019 Japan Prosthodontic Society. Published by Elsevier Ltd. All rights reserved.