티타늄 및 PEEK 지대주 소재가 임플란트 유지 수복물 및 주위 지지골 응력 분포에 미치는 영향: 3차원 유한요소해석
Effects of titanium and PEEK abutments on implant-supported dental prosthesis and stress distribution of surrounding bones: three-dimensional finite element analysis
홍민호,
소속 상세정보
홍민호 ( Hong Min-ho ) - Catholic University of Pusan College of Health Sciences Department of Dental Laboratory Science
Abstract
Purpose: This study aimed to comparatively evaluate the stress distribution of bones sur-rounding the implant system to which both titanium and polyetheretherketone (PEEK) abut-ments are applied using a three-dimensional finite element analysis.
Methods: The three-dimensional implant system was designed by the computer-aided de-sign program (CATIA; Dassault Systemes). The discretization process for setting nodes and elements was conducted using the HyperMesh program (Altair), after finishing the design of each structure for the customized abutment implant system. The results of the stress anal-ysis were drawn from the Abaqus program (Dassault Systemes). This study applied 200 N of vertical load and 100 N of oblique load to the occlusal surface of a mandibular first mo-lar.
Results: Under external load application, the PEEK-modeled dental implant showed the highest von Mises stress (VMS). The lowest VMS was observed in the Ti-modeled abutment screws. In all groups, the VMS was observed in the crestal regions or necks of implants.
Conclusion: The bones surrounding the implant system to which the PEEK abutment was applied, such as the cortical and trabecular bones, showed stress distribution similar to that of the titanium implant system. This finding suggests that the difference in the abut-ment materials had no effect on the stress distribution of the bones surrounding implants. However, the PEEK abutments require mechanical and physical properties improved for clinical application, and the clinical application is thought to be limited.
키워드
Dental implants; Finite element analysis; Implant-supported dental prosthesis; Polyetheretherketone
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