Effect of internal flexible mechanisms on occlusal contacts of implant-supported prostheses
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概要
- 論文の詳細を見る
We investigated the effect that different internal flexible mechanisms placed on implant had on occlusal contacts in the intercuspal position (ICP) when the implants were in mandibular unilateral free-end cases. We selected five subjects who had excellent clinical progression for five years or more after placement of the prostheses on IMZ implants. Informed consent was obtained from the subjects. Each of the three internal flexible mechanisms, the intramobile element (IME), the intramobile connector (IMC), and the titanium element (Ti), was placed inside the prosthesis. The registration of occlusal contacts using silicone impression materials was made during clenching in ICP at the two levels of 10 and 30% maximum voluntary clenching (MVC). We used the add-picture inspection method, which visualizes occlusal contacts by digital image processing, to quantitatively analyze the silicone occlusal records. We observed variations in the number and area of occlusal contacts between the two occlusal strengths. Statistical analysis was performed using the Wilcoxon test, Kruskal-Wallis test, and Friedman test to compare the occlusal contacts of the three mechanisms at two clenching levels (significance level : p<0.05). as the occlusal strength was increased from 10% to 30% MVC, the number and area of occlusal contacts on natural teeth increased significantly, regardless of the type of mechanism. although there was no significant difference in the number of occlusal contacts on the prostheses, the area of occlusal contacts increased significantly. although there was no significant difference in the rate of increase between natural teeth and the prostheses when IME and IMC were placed, a significant difference was seen when Ti was placed. These results indicate that there was an appropriate change in occlusal contacts because of displacements of the opposing teeth and strain on their supporting tissues irrespective of internal different flexible mechanism. We concluded that the influence of flexible mechanisms was not significant in the same individual.
- 大阪歯科学会の論文
著者
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Tada Hisaya
Department Of Fixed Prosthodontics And Occlusion Osaka Dental University
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Kawazone Takayoshi
Department of Fixed Prosthodontics and Occlusion Osaka Dental University
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Kawazoe Takayoshi
Department Fixed Prosthodontics And Occlusion Osaka Dental University
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