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THREE DIMENSIONAL FINITE ELEMENT ANALYSIS OF MANDIBULAR STRESSES UNDER COMPLETE DENTURES WITH VARIANT ARTIFICIAL TEETH FORMS AND OCCLUSAL PATTERNS 총의치 교합면 형태가 하악골 응력 분포에 미치는 영향에 관한 삼차원 유한요소분석적 연구
Cheol -Gyu Lee, Chang -Whe Kim, Yung -Soo Kim
이철규, 김창회, 김영수

Complete denture occlusion must be developed to function efficiently and with the least
amount of trauma to the supporting tissues. For the preservation of supporting tissues, it is
imperative to reduce to a minimum the functional stress induced by dentures.
The magnitude of the horizontal component of functional stress contributed by various
occlusal teeth forms has not been studied.
This study was aimed to investigate the influence of different occlusal teeth forms on the mode
of distribution of the stresses in the mandibular tissue, and the displacement of lower dentures
during the variant functional movement of mandible.
For this study three dimensional finite element analysis was used. FEM models were created
using commercial software Super Sap for IBM 32 bit computer.
The model was composed of 3380 brick elements and 4346 nodes.
The results were as follows :
1. The magnitude of stress was similar between two models in centric occlusion, in the case of
anatomic model, the stress was concentrated on the buccal side of alveolar ridge beneath the
bicuspids.
2. During the protrusive movement, the increasing of stress from the posterior to anterior part of
mandible was seen in the case of anatomic model.
3. During the lateral movement, the stress of anatomic model was greater than that of
nonanatomic model.
4. The stress of anatomic model was concentrated on the anterior region of residual ridge during
the lateral movement.
5. In the case of anatomic model the anterior part of denture was displaced severely at the centric
and lateral position, but the denture of nonanatomic model was displaced minutely at the
protrusive and lateral position.

* Keywords: occlusion, stress, denture, finite element, three-dimensional

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