Fracture modelling of zirconia crowns in dental implant systems using XFEM, phase-field methods, and Weibull statistics.

IF 6.3 1区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Dental Materials Pub Date : 2026-09-29 DOI:10.1016/j.dental.2026.09.014

Mojtaba Jalali, Rk Singh Raman, Mehrdad Abolghasemi, Mahmoud Mostafavi, Fatemeh Azhari

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引用次数: 0

Abstract

Objectives: This study aimed to develop a continuum-scale computational workflow for assessing fracture behaviour of zirconia crowns in dental implant systems under ISO 14801 loading conditions.

Methods: A three-dimensional finite element model of a Matrix multi-level implant system was developed. Global elastic analysis was first used to evaluate the maximum principal tensile stress distribution in the zirconia crown. The extended finite element method was then applied to assess damage initiation and crack-path development. A localized phase-field fracture sub-model was used to examine regularized damage evolution in the critical region. Weibull weakest-link analysis was applied to full-crown tensile stress fields to estimate fracture probability as a function of load.

Results: The global stress analysis identified the crown-indenter contact region as the critical tensile stress concentration. The extended finite element simulation predicted damage initiation beneath the indenter, followed by crack development toward the crown-implant interface. The phase-field sub-model showed progressive damage localization in the same critical region. Weibull analysis predicted a rapid increase in fracture probability within the load range corresponding to reported experimental fracture forces for similar implant-supported zirconia crowns.

Significance: The proposed workflow combines deterministic crack modelling with probabilistic fracture assessment and provides a mechanics-based approach for evaluating fracture risk in implant-supported zirconia crowns.

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使用XFEM，相场方法和威布尔统计的牙齿种植系统中氧化锆冠断裂建模。

目的：本研究旨在开发一个连续规模的计算工作流程，以评估在ISO 14801负载条件下牙科种植系统中氧化锆冠的断裂行为。方法：建立基质多层种植体的三维有限元模型。首次采用整体弹性分析方法评价了氧化锆冠的最大主拉应力分布。然后应用扩展有限元方法评估损伤起裂和裂纹路径发展。采用局部相场断裂子模型考察临界区域的正则化损伤演化。采用威布尔最弱环节分析全冠拉应力场，估计断裂概率作为载荷的函数。结果：整体应力分析确定了顶压头接触区域为临界拉应力集中区域。扩展有限元模拟预测了压头下方的损伤开始，随后裂纹向牙冠-种植界面发展。相场子模型在同一临界区域表现出损伤的渐进式局部化。Weibull分析预测，在与报道的实验断裂力相对应的载荷范围内，类似的种植支撑氧化锆冠的断裂概率会迅速增加。意义：提出的工作流程将确定性裂缝建模与概率断裂评估相结合，为评估种植式氧化锆冠的断裂风险提供了一种基于力学的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Dental Materials 工程技术-材料科学：生物材料

CiteScore

9.80

自引率

10.00%

发文量

290

审稿时长

67 days

期刊介绍： Dental Materials publishes original research, review articles, and short communications. Academy of Dental Materials members click here to register for free access to Dental Materials online. The principal aim of Dental Materials is to promote rapid communication of scientific information between academia, industry, and the dental practitioner. Original Manuscripts on clinical and laboratory research of basic and applied character which focus on the properties or performance of dental materials or the reaction of host tissues to materials are given priority publication. Other acceptable topics include application technology in clinical dentistry and dental laboratory technology. Comprehensive reviews and editorial commentaries on pertinent subjects will be considered.