The impact of conical design of dental implant and osteotomy shape on the insertion process and primary stability

IF 3.5 2区医学 Q2 ENGINEERING, BIOMEDICAL

Journal of the Mechanical Behavior of Biomedical Materials Pub Date : 2025-08-19 DOI:10.1016/j.jmbbm.2025.107170

Armin Shanazari, Pedram Akhlaghi, Gholamreza Rouhi

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引用次数: 0

Abstract

This study investigated the impact of dental implant shape (conical vs. cylindrical) and pilot-hole geometry (conical vs. cylindrical) on primary stability. Finite element analysis was employed to simulate the insertion process and push-in test. Three implantation scenarios were examined: a cylindrical implant in a cylindrical pilot-hole (cy-cy model), a conical implant in a cylindrical pilot-hole (co-cy model), and a conical implant in a conical pilot-hole (co-co model). These configurations were evaluated based on the maximum insertion torque, insertion energy, stiffness, and holding power of the implant-bone construct. Given peri-implant damage during the insertion process and push-in test, elastic-plastic-damage properties were used to model bone material behavior. Results showed that despite lower implant-bone engagement in the co-cy scenario, its maximum insertion torque was 81 % higher than the cy-cy model. However, the stiffness and the holding power were 31 % and 44 % lower, respectively. Additionally, the co-co scenario demonstrated a significant increase in maximum insertion torque compared to other models while maintaining stiffness and holding power comparable to the cy-cy configuration, making it the most favorable model. This study also highlighted the importance of insertion energy as a potential indicator of implant-bone construct engagement, suggesting its consideration alongside other traditional stability factors. Further research, including in-vitro experiments, is necessary to refine pilot-hole geometry based on implant body design, ultimately enhancing primary stability and improving clinical outcomes in dental implantation.

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种植体的锥形设计和截骨形状对植牙过程和初期稳定性的影响

本研究调查了种植体形状（锥形vs圆柱形）和导孔几何形状（锥形vs圆柱形）对初级稳定性的影响。采用有限元方法模拟了插入过程和推入试验。研究了三种种植方案：圆柱形种植体在圆柱形导孔中（cy-cy模型）、圆锥形种植体在圆柱形导孔中（co-cy模型）和圆锥形种植体在圆锥形导孔中（co-co模型）。根据植入物-骨结构的最大插入扭矩、插入能量、刚度和保持力对这些配置进行评估。考虑到植入过程和推入试验期间种植体周围的损伤，使用弹塑性损伤特性来模拟骨材料的行为。结果表明，尽管co-cy模式下种植体与骨的接合度较低，但其最大插入扭矩比cy-cy模式高81%。然而，刚度和保持力分别降低了31%和44%。此外，与其他车型相比，co-co方案的最大插入扭矩显著增加，同时保持了与cy-cy配置相当的刚度和动力，使其成为最有利的车型。该研究还强调了插入能量作为种植体-骨构建体接合的潜在指标的重要性，建议将其与其他传统稳定性因素一起考虑。进一步的研究，包括体外实验，需要在种植体设计的基础上完善导孔几何形状，最终提高初级稳定性，改善牙科种植的临床效果。

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

Journal of the Mechanical Behavior of Biomedical Materials 工程技术-材料科学：生物材料

CiteScore

7.20

自引率

7.70%

发文量

505

审稿时长

46 days

期刊介绍： The Journal of the Mechanical Behavior of Biomedical Materials is concerned with the mechanical deformation, damage and failure under applied forces, of biological material (at the tissue, cellular and molecular levels) and of biomaterials, i.e. those materials which are designed to mimic or replace biological materials. The primary focus of the journal is the synthesis of materials science, biology, and medical and dental science. Reports of fundamental scientific investigations are welcome, as are articles concerned with the practical application of materials in medical devices. Both experimental and theoretical work is of interest; theoretical papers will normally include comparison of predictions with experimental data, though we recognize that this may not always be appropriate. The journal also publishes technical notes concerned with emerging experimental or theoretical techniques, letters to the editor and, by invitation, review articles and papers describing existing techniques for the benefit of an interdisciplinary readership.