利用三维有限元分析使用微型螺钉真正植入前牙时对牙齿和牙槽骨的生物力学影响。

IF 1.8 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

International Orthodontics Pub Date : 2024-10-10 DOI:10.1016/j.ortho.2024.100925

Ankit Bharadwaj , Sachin Ahuja , Japjee Uppal , Eenal Bhambri , Renu Sewta , Seema Gupta

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引用次数: 0

摘要

目的：本研究的主要目的是通过有限元分析法研究使用微型种植体进行切牙真性内侵时对牙槽骨、牙周韧带（PDL）、骨水泥的生物力学影响和应力，以及沿X、Y和Z轴的位移；次要目的是找出临床实践中治疗前牙深咬合畸形的最佳前牙内侵方法：采用三维有限元方法，使用微型种植体模拟真正的前牙内侵滑动力学。对两组模型进行了模拟，模型 1 的微型种植体放置在侧切牙远端，模型 2 的微型种植体放置在前鼻骨脊柱（ANS）下方，以实现入侵：在本研究比较的几种模式中，在侧切牙远端植入微型种植体（模式 1）的牙槽骨和 PDL 应力表现最佳。结论：在皮质骨和 PDL 中发现了最大应力。从牙颈部到根尖，应力的性质从压应力转变为拉应力，主要集中在根尖部位。在比较的各种方式中，前牙内陷治疗前牙深咬合畸形的最佳控制牙齿移动方式是在侧切牙远端植入微型种植体（模型 1）。

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A 3D finite element analysis of biomechanical effects on teeth and bone during true intrusion of anteriors using miniscrews

Purpose

The primary objective of this study was to investigate the biomechanical effects and stresses on bone, periodontal ligament (PDL), cementum and displacement along X-, Y- and Z-axis during true intrusion of incisors using mini-implants with Finite Element Analysis; the secondary objective of the study was to find out the best method for anterior intrusion in clinical practice to treat anterior deep bite malocclusions.

Materials and methods

A 3D finite element method was used to simulate true anterior intrusion with sliding mechanics using mini-implants. Two groups were modelled with mini-implants placed distal to lateral incisors for Model 1, and below the anterior nasal spine (ANS) for Model 2, to achieve intrusion. von Mises stress, principal stress on PDL and alveolar bone, displacements in all 3 planes were determined.

Results

Amongst the modalities compared in the present study, the stresses on bone and PDL were showing best behavior for mini-implants placed distal to lateral incisors (Model 1). The teeth showed controlled tooth movement in Model 1.

Conclusion

Maximum stress was found in the cortical bone and in the PDL. Nature of the stress changed from compressive to tensile from cervical area to root apex, concentrating mainly at the apical area. Amongst the modalities compared, the best controlled tooth movements for anterior intrusion to treat anterior deep bite malocclusions, was for mini-implants placed distal to lateral incisors (Model 1).

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来源期刊

International Orthodontics DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

2.50

自引率

13.30%

发文量

审稿时长

26 days

期刊介绍： Une revue de référence dans le domaine de orthodontie et des disciplines frontières Your reference in dentofacial orthopedics International Orthodontics adresse aux orthodontistes, aux dentistes, aux stomatologistes, aux chirurgiens maxillo-faciaux et aux plasticiens de la face, ainsi quà leurs assistant(e)s. International Orthodontics is addressed to orthodontists, dentists, stomatologists, maxillofacial surgeons and facial plastic surgeons, as well as their assistants.