하중 조건에 따른 원추형 내측연결 임플랜트 시스템에서 지대주 침하 및 적합에 관한 연구

Abstract

The purpose of this study was to evaluate internal conical abutment sinking and fitness according to the loading condition. In this study, Alloden implant fixture and two abutment(conventional, FDI) systems were used. Each abutment applied 1 time of finger force, 3 times of malleting force, 5 times of 20kg and extra several times to the fixture until the amount of abutment singking shows no change. Then, the length of abutment to fixture which is binding lightly under no pressure state was measured by Vernier caliper. After loading application, the length was remeasured and we calculated the amount of sinking. The implant was buried in unsaturated polyester (Epovia, Cray Valley Inc. Korea) for making a comparison between length change and fitness change of abutment-fixture connection part. Then All samples were cross-sectioned with high speed precision cut-off(accutom-5, Struers, Denmark). Finally, we observed and analyzed the result using FE-SEM (field emission scanning electron microscopy).

The results were as follows: 1. When the fixture connects to the abutment, the finger force was about 5.91±0.58kg and the malleting force was about 3.35±0.29kg.

2. As the result of masticatory force load after connecting fixture to abutment, the fitness of fixture-abutment interface showed almost tight contact each other.

3. As the loading condition being added, the abutment showed more sinking phase.

4. In consequence of loading application until the amount of sinking has no change, conventional abutment shows 0.51±0.06mm as total amount of sinking after 7～8 times, and FDI abutment shows 0.75±0.06mm as total amount of sinking after 10～13 times. In conclusion, the implant which is conical abutment without screws shows generally favorable fitness to masticatory force, however as the loading condition being added, we could notice that the amount of sinking of fixture-abutment connection part has increasing tendency. Therefore, It is thought that the dentists using this system need to do the follow-up check if there is something wrong with occlusion or not periodically, and the manufacturer should complement this aspect.