Finite element analysis of peri-implant bone stress influenced by cervical module configuration of endosseous implant.
10.4047/jkap.2009.47.4.394
- Author:
Jae Min CHUNG
1
;
Kwang Heon JO
;
Cheong Hee LEE
;
Wonjae YU
;
Kyu Bok LEE
Author Information
1. Department of Prosthodontics, School of Dentistry, Kyungpook National University, Korea. kblee@knu.ac.kr
- Publication Type:Original Article
- Keywords:
One-piece implant;
Transgingival design;
Finite element method;
Crestal bone stress
- MeSH:
Axis, Cervical Vertebra;
Dental Implants;
Finite Element Analysis;
Models, Theoretical
- From:The Journal of Korean Academy of Prosthodontics
2009;47(4):394-405
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
STATEMENT OF PROBLEM: Crestal bone loss, a common problem associated with dental implant, has been attributed to excessive bone stresses. Design of implant's transgingival (TG) part may affect the crestal bone stresses. PURPOSE: To investigate if concavely designed geometry at a dental implant's TG part reduces peri-implant bone stresses. MATERIAL AND METHODS: A total of five differently configured TG parts were compared. Base model was the ITI one piece implant (Straumann, Waldenburg, Switzerland) characterized by straight TG part. Other 4 experimental models, i.e. Model-1 to Model-4, were designed to have concave TG part. Finite element analyses were carried out using an axisymmetric assumption. A vertical load of 50 N or an oblique load of 50 N acting at 30degrees with the implant's long axis was applied. For a systematic stress comparison, a total of 19 reference points were defined on nodal points around the implant. The peak crestal bone stress acting at the intersection of implant and crestal bone was estimated using regression analysis from the stress results obtained at 5 reference points defined along the mid plane of the crestal bone. RESULTS: Base Model with straight configuration at the transgingival part created highest stresses on the crestal bone. Stress level was reduced when concavity was imposed. The greater the concavity and the closer the concavity to the crestal bone level, the less the crestal stresses. CONCLUSION: The transgingival part of dental implant affect the crestal bone stress. And that concavely designed one may be used to reduce bone stress.
