Influence of Hexagonal Height on the Stress Distribution

Hexagon is important in maintaining the resisting stability of the screw in implant with external connection. There have been some studies on the experimental methods according to the external hexagon height or shape. However there have been no studies on the stress distribution of the lower supporting structure in terms of the height of the hexagon. Therefore, the purpose of this study was to evaluate the mechanical stability and the factors that have an affect by calculating through stress analysis using 3D finite element in and around the screw type implant with external connection according to the hexagonal height on the stress distribution. CAD data with variances of hexagonal height of 0.0, 0.7, 1.2 1.5 mm was formed based on the Osstem® Implant(Osstem Co., Pusan, South Korea) USII (ABFR411S) model. The stress distribution was compared by selecting the Von Mises stress(Mpa) among the various stress distribution numbers using the 3D analysis program, ABAQUS 6.4 (ABAQUS, Inc., Providence, USA) The results were marked with colors according to the amount of stress to differentiate the maximum stress concentrated area based on the von Mises stress. In addition the von Mises stress that has different colors was compared and analyzed in each experimental group. The force pattern on the implant fixture and titanium screw was examined through the color distribution and the maximum stress value of each component such as the upper crown, screw, fixture, cortical bone and the cancellous bone was compared The results are as follows in this study. 1. The hexagonal height of the implant with external connection had an influence on the stress distribution of the fixture, screw and upper prosthesis and the surrounding supporting bone. 2. As the hexagon height increased, the stress was well distributed and there was a decrease in the maximum stress value. 3. If the height of the hexagon reached over 1.2mm, there was no significant influence on the stress distribution. The hexagon is a necessary factor in implant with external connection. There was a more effective stress distribution when the height of the hexagon increased. However, as the height of the hexagon increases, it is more difficult to place the upper prosthesis on top of it. Therefore it is important to maintain the proper height of the hexagon and according to this study, the appropriate height is considered to be 1.2mm.

Author dc:creator

• 박, 성재

Contributors dc:contributor

• 고, 석민
• 대학원 의학과
• 200324264

• 외측연결육각구조 높이
• 유한 요소 분석
• 최대응력
• 임플란트

Language dc:language

ko

Identifier

http://dcoll.ajou.ac.kr:9080/dcollection/jsp/common/DcLoOrgPer.jsp?sItemId=000000001273
000000001273

OAI identifier oai:identifier

oai:repository.ajou.ac.kr:201003/1573