Force exerted on maxillary anterior teeth in mandibular unilateral and bilateral distal extension partial edentulous situation
Force exerted on maxillary anterior teeth in mandibular unilateral and bilateral distal extension partial edentulous situation
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DOI：
10.1007/s10266-022-00760-2
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发表时间：
2022-10-28
期刊：
影响因子：
2.5
通讯作者：
Ikebe，Kazunori
中科院分区：
文献类型：
--
作者：
Togawa，Hitomi;Gonda，Tomoya;Ikebe，Kazunori
本研究的目的是确定下颌单侧和双侧远端延伸部分无牙颌情况以及使用可摘局部牙修复体对上颌前牙施加的力的影响。使用市售的具有可更换牙齿的颌模型。准备了7种下颌远伸无牙颌情况的实验条件，制作了用于替代后牙缺失的远伸可摘部分牙修复体。通过在模型的上颌和下颌牙齿之间插入咬合力测量膜来测量咬合力。施加咬合载荷，并使用 Kruskal-Wallis 检验和 Mann-Whitney U 检验比较力和比率（p< 0.05）。结果，在单侧和双侧无牙颌情况下，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。使用可摘局部假牙后，施加在上颌前牙上的力显着减少。结论：下颌单侧及双侧远中伸长部分无牙颌情况下，当剩余牙齿数量减少时，上颌前牙的负担会增加。我们的研究结果表明，对于下颌远伸部分无牙颌情况的患者，使用可摘部分牙修复体可以通过减少过度用力来有效保留剩余牙齿。
The purpose of this study was to determine the influence of mandibular unilateral and bilateral distal extension partial edentulous situation and the use of removable partial dental prostheses on the force exerted on maxillary anterior teeth. A commercially available jaw model with exchangeable teeth was used. Seven experimental conditions of mandibular distal extension edentulous situation were prepared and a distal extension removable partial dental prosthesis to replace missing posterior teeth was fabricated. The occlusal force was measured by inserting an occlusal force measuring film between the maxillary and mandibular teeth of the model. An occlusal load was applied and the forces and ratios were compared using the Kruskal–Wallis test and the Mann–Whitney U test (p< 0.05). As a result, the force exerted on the maxillary anterior teeth increased significantly as the number of remaining teeth decreased in unilateral and bilateral edentulous situation. The force exerted on the maxillary anterior teeth decreased significantly with use of a removable partial dental prosthesis. It is concluded that when the number of remaining teeth decreases in mandibular unilateral and bilateral distal extension partial edentulous situation, the burden on the maxillary anterior teeth increases. Our findings suggest that for patients with mandibular distal extension partial edentulous situation, using a removable partial dental prosthesis is effective in preserving the remaining teeth by reducing excessive force.