골내 임플랜트의 종류에 따른 광탄성 응력 분석
Photoelastic analysis of stress induced by different type endosseous implants.
장두익, 정재헌,
소속 상세정보
장두익 ( Chang Doo-Ik ) - 조선대학교 치과대학 보철학교실
정재헌 ( Chung Chae-Heon ) - 조선대학교 치과대학 보철학교실
KMID : 0353319930170010137
Abstract
The purpose of this study was to analyze the stress distribution at supporting bone according to the types of endosseous implants.
This investigation evaluated the stress patterns in rectangular photoelastic models produced by four different types of dental implants such as Branemark, screw type of Steri-Oss, blade type of Steri-Oss, IMZ with IMC and resin tooth using
the
techniques of quasi-three dimensional photoelasticity.
All prostheses were casted in the same nonprecious alloy and were cemented or screwed on their respective implants and abutments.
20kg of vertical load was applied on the central fossa of casted crown and 16kg of inclined load was applied on the top third of distal surface of casted crown respectively.
@ES The results were as follows:
@EN 1. Under the vertical load, screw implants of Steri-Oss and Branemark showed increasing stress condition between and around the screw threads along the implant lateral surface and cylindrical implant of IMZ showed the less stress condition
along the
lateral surface with concentration of stress mostly near the root apex.
2. Under the vertical load, the stress of Steri-Oss blade was distributed uniformly at the alveolar bone under the broad blade.
3. Under the inclined load, the stress concentration of Steri-Oss serew and Branemark was developed highly around the mesiocervical bone area on the contralateral side to force application. The stress of Branemark with flexible gold with
flexible
gold
screw was more concentrated in the cervical bone area than that of Steri-Oss with stiff crew.
4. Under the inclined load, the stress of Steri-Oss blade broadly was distributed around the mesiocervical bone area and the lower and mesial bone area of the blade.
5. Under the inclined load, IMZ implant showed the gap between crown and fixture due to deformation of the IMC and IMZ was lower in stress concentration developed around the mesiocervical bone area than Branemark and Steri-Oss screw.
6. Under the inclined load, the stress magnitude induced in the mesiocervical bone area of implants was in order of Branemark, Steri-Oss screw, IMZ and Steri-Oss blade.
7. Tilting forces as compared to axial forces exerted greater magnitude of stress in the cervical bone grea of the implant.
8. In respect of stress distribution, Steri-Oss blade was superior than any other implants and in respect of the stability by horizontal force, IMZ and Branemark was inferior than any other implants.
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