Influence of reinforcement on strain within maxillary implant overdenture
Influence of reinforcement on strain within maxillary implant overdenture
复制标题
加固对上颌种植覆盖义齿内应变的影响
DOI：
10.11607/jomi.3997
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Maeda Y.
中科院分区：
文献类型：
--
作者：
Takahashi T;Gonda T;Maeda Y.
目的：摘要本研究旨在探讨上颌骨植体覆盖义齿中，植入管型补强对应力的影响。材料与方法：制作了一个上颌无牙模型，种植体放置在双侧犬齿的位置，圆顶形帽，和实验覆盖义齿。将玫瑰花型应变片连接在尖牙位置和沿义齿抛光面中线沿着的三个点上，并连接到由个人计算机控制的传感器接口。本实验对5种不同加强体的义齿进行了实验研究：无加强体、在剩余牙槽嵴和冠顶上铸造钴铬合金加强体、在第一磨牙至第一磨牙、剩余牙槽嵴和冠顶上铸造钴铬合金加强体、在剩余牙槽嵴和冠侧上铸造钴铬合金加强体、在第一磨牙至第一磨牙、剩余牙槽嵴和冠顶上铸造钴铬合金加强体、在剩余牙槽嵴和冠侧上铸造钴铬合金加强体、在剩余牙槽嵴和冠侧上铸造钴铬合金加强体、在剩余牙槽嵴和冠侧上铸造钴铬合金加强体。从第一磨牙到第一磨牙，在剩余牙槽嵴和内冠侧面上使用相同的加固。分别对第一前磨牙和第一磨牙施加49 N的垂直咬合载荷，测量其应变并进行方差分析。结果：在两种加载情况下，有加固的义齿比没有加固的义齿应变明显减少。当第一前磨牙被加载到在第一前磨牙处具有和不具有腭部加强件的义齿上时，在冠顶部上具有加强件的义齿上的应变显著低于在犬齿位置上在冠侧上具有加强件的义齿上的应变。结论：在残留牙槽嵴和嵌入丙烯酸树脂基托的顶盖顶部铸造加固物，减少了上颌种植体覆盖义齿上的咬合应力应变。
Purpose: The purpose of this study was to examine the influence of reinforcement of an embedded cast on the strains within maxillary implant overdentures. Materials and Methods: A maxillary edentulous model with implants placed bilaterally in the canine positions, dome-shaped copings, and experimental overdentures was fabricated. Rosette-type strain gauges were attached in the canine positions and at three points along the midline of the polished surface of the denture and connected to the sensor interface controlled by a personal computer. Experimental dentures with five different reinforcements were tested: without reinforcement; with a cast cobalt-chrome reinforcement over the residual ridge and the tops of the copings; with the same reinforcement from first molar to first molar, over the residual ridge and the tops of the copings; with the same reinforcement over the residual ridge and the sides of the copings; and with the same reinforcement from first molar to first molar, over the residual ridge and the sides of the copings. A vertical occlusal load of 49 N was applied to the first premolar and then to the first molar, and the strains were measured and compared by analysis of variance. Results: In both loading situations, significantly less strain was recorded in dentures with reinforcement than in those without reinforcement. When the first premolar was loaded on dentures with and without palatal reinforcement at the first premolars, the strains on the denture with reinforcement over the tops of the copings were significantly lower than on the denture with reinforcement over the sides of the copings at the canine position. Conclusion: Cast reinforcement over the residual ridge and the top of copings embedded in an acrylic base reduced the strain from occlusal stress on maxillary implant overdentures.