Finite-Element Analysis of Dental-Implant Screws Based on Thread Geometry Conditions

Young-Seong Kim

doi:10.7734/COSEIK.2026.39.2.111

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2026 Vol.39, Issue 2 Preview Page Next Page

Research Paper

Finite-Element Analysis of Dental-Implant Screws Based on Thread Geometry Conditions 나사 형상 조건에 따른 치과용 임플란트 나사의 유한요소해석

30 April 2026. pp. 111-114

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Abstract

This study investigates the effect of thread pitch on stress-concentration behavior in a dental-implant screw system using three-dimensional finite-element analysis. A dental implant assembly comprising a fixture, abutment, and anterior and posterior screws is modeled, and functional occlusal loading conditions are applied to simulate clinical mastication forces. The numerical results reveal that thread pitch governs stress redistribution within the implant system. As the pitch decreases, the maximum stress in the anterior screw increases, whereas the posterior screw exhibits a reduction in peak stress, i.e., the opposite trend. This behavior indicates that pitch variation modifies the load-sharing mechanisms between screw locations, instead of merely altering the overall stress magnitude. Such redistribution is attributed to variations in load-transfer paths and local stiffness at the implant-abutment interface. These findings indicate that thread pitch is a design-sensitive geometric parameter that affects position-dependent stress concentrations in dental implants. Therefore, pitch optimization provides an effective strategy for controlling load distributions and enhancing mechanical stability, thereby improving the long-term reliability of implant screw systems under clinical loading conditions.

Keywords

finite-element analysis

implant structure

prosthetic screws

thread

design

본 연구에서는 3차원 유한요소해석을 이용하여 치과용 임플란트 나사 시스템에서 thread pitch 변화가 응력집중 거동에 미치는 영향을 분석하였다. Fixture, abutment, anterior 및 posterior screw로 구성된 임플란트 조립체를 모델링하고, 임상적 교합하중을 모사한 경계조건 및 하중조건을 적용하였다. 해석 결과, pitch 감소에 따라 anterior screw에서는 최대 응력이 증가하고 posterior screw에서는 감소하는 상반된 경향이 나타났으며, 이는 pitch 변화가 응력 크기 자체보다는 screw 위치 간 하중 재분배를 유도함을 의미한다. 이러한 거동은 임플란트-지대주 연결부에서의 하중 전달 경로 및 국부 강성 변화에 기인하는 것으로 판단된다. 따라서 thread pitch는 위치별 응력집중을 제어하는 주요 설계 변수이며, pitch 최적화를 통해 임플란트 시스템의 기계적 안정성을 향상시킬 수 있음을 확인하였다.

키워드

유한요소해석

임플란트 구조

보철나사

나사산

설계

References

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Information

Publisher :Computational Structural Engineering Institute of Korea
Publisher(Ko) :한국전산구조공학회
Journal Title :Journal of the Computational Structural Engineering Institute of Korea
Journal Title(Ko) :한국전산구조공학회 논문집
Volume : 39
No :2
Pages :111-114
Received Date : 2026-03-03
Revised Date : 2026-03-08
Accepted Date : 2026-03-09
DOI :https://doi.org/10.7734/COSEIK.2026.39.2.111

Journal of the Computational Structural Engineering Institute of Korea ISSN:1229-3059(Print) 2287-2302(Online) 한국전산구조공학회 논문집

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