PDF(Pubmed)
Abstract：
OBJECTIVE: The aim of this study was to analyze and compare the stress distribution on dental implants in various positions when used with implant-assisted removable partial dentures.
METHODS: This was an in vitro study.
METHODS: A model representing a mandibular bilateral partially edentulous condition, with missing premolars and molars, was fabricated using epoxy resin. Two implants of similar diameter measuring 4.0 mm × 10 mm (Dentium, Korea) were inserted in the second molar and the second premolar region on either side of the model for comparing the biomechanical effect of various implant locations. Two types of loads 100N and 125N were applied vertically using universal testing machines in the premolar and molar regions. The loads on the implants beneath the cast partial denture were measured by physical stress analysis using a microstrain gauge.
METHODS: A comparison of maximum stress observed at the premolar versus molar regions due to the application of the 100N and 125N loads was done using the Mann-Whitney U-test.
RESULTS: In physical stress analysis, obtained results were statistically analyzed, and the result was statistically not significant (P = 0.435 at 100N and P = 0.718 at 125N) in positional changes of implant.
CONCLUSIONS: In the current study, the statistical analysis of physical stress revealed no significant differences in stress values between the loadings at the premolar and molar regions. This suggests that the implant can be placed in either the premolar or molar region based on the availability of bone without affecting stress distribution.
METHODS: This was an in vitro study.
METHODS: A model representing a mandibular bilateral partially edentulous condition, with missing premolars and molars, was fabricated using epoxy resin. Two implants of similar diameter measuring 4.0 mm × 10 mm (Dentium, Korea) were inserted in the second molar and the second premolar region on either side of the model for comparing the biomechanical effect of various implant locations. Two types of loads 100N and 125N were applied vertically using universal testing machines in the premolar and molar regions. The loads on the implants beneath the cast partial denture were measured by physical stress analysis using a microstrain gauge.
METHODS: A comparison of maximum stress observed at the premolar versus molar regions due to the application of the 100N and 125N loads was done using the Mann-Whitney U-test.
RESULTS: In physical stress analysis, obtained results were statistically analyzed, and the result was statistically not significant (P = 0.435 at 100N and P = 0.718 at 125N) in positional changes of implant.
CONCLUSIONS: In the current study, the statistical analysis of physical stress revealed no significant differences in stress values between the loadings at the premolar and molar regions. This suggests that the implant can be placed in either the premolar or molar region based on the availability of bone without affecting stress distribution.
摘要：
目的：这项研究的目的是分析和比较与植入物辅助的可移动局部义齿一起使用时，牙科植入物在各种位置上的应力分布。
方法：这是一项体外研究。
方法：代表下颌双侧部分缺牙的模型，缺少前磨牙和磨牙，使用环氧树脂制造。两个直径相似的植入物，尺寸为4.0mm×10mm（Dentium，韩国）被插入模型任一侧的第二磨牙和第二前磨牙区域，以比较各种植入物位置的生物力学效果。使用通用试验机在前磨牙和磨牙区域垂直施加两种类型的载荷100N和125N。使用微应变仪通过物理应力分析来测量铸造局部义齿下方的植入物上的载荷。
方法：使用Mann-WhitneyU检验，比较了由于施加100N和125N载荷而在前磨牙与磨牙区域观察到的最大应力。
结果：在物理应力分析中，获得的结果进行统计分析，种植体位置变化无统计学意义(100N时P=0.435，125N时P=0.718)。
结论：在当前的研究中，物理应力的统计分析显示，前磨牙和磨牙区域的载荷之间的应力值没有显着差异。这表明植入物可以基于骨的可用性放置在前磨牙或磨牙区域而不影响应力分布。
方法：这是一项体外研究。
方法：代表下颌双侧部分缺牙的模型，缺少前磨牙和磨牙，使用环氧树脂制造。两个直径相似的植入物，尺寸为4.0mm×10mm（Dentium，韩国）被插入模型任一侧的第二磨牙和第二前磨牙区域，以比较各种植入物位置的生物力学效果。使用通用试验机在前磨牙和磨牙区域垂直施加两种类型的载荷100N和125N。使用微应变仪通过物理应力分析来测量铸造局部义齿下方的植入物上的载荷。
方法：使用Mann-WhitneyU检验，比较了由于施加100N和125N载荷而在前磨牙与磨牙区域观察到的最大应力。
结果：在物理应力分析中，获得的结果进行统计分析，种植体位置变化无统计学意义(100N时P=0.435，125N时P=0.718)。
结论：在当前的研究中，物理应力的统计分析显示，前磨牙和磨牙区域的载荷之间的应力值没有显着差异。这表明植入物可以基于骨的可用性放置在前磨牙或磨牙区域而不影响应力分布。
