在正牙科负荷和运动下对牙周骨部件的评估,以及牙周病变期间的运动-A有限元素分析
Radu-Andrei Moga1, Cristian Doru Olteanu2, Ada Gabriela Delean1
1Department of Cariology, Endodontics and Oral Pathology, School of Dental Medicine, University of Medicine and Pharmacy Iuliu Hatieganu, Strada Motilor 33, 400001 Cluj-Napoca, Romania.
Dentistry journal
|June 26, 2024
概括
ортодонтических力量影响骨压力,更高的力量和某些运动增加了风险在减少的牙周. 安全力水平取决于周期性.
科学领域:
- 生物力学 生物力学
- 矯正牙科 矯正牙科是一種矯正牙科.
- 牙周病学 牙周病学
背景情况:
- 脊椎骨对正牙力量的反应是复杂的.
- 牙周病变显著改变了骨的机械行为.
- 了解压力分布对于预防骨损伤至关重要.
研究的目的:
- 在牙周损坏的 ортодонтических 力量下数值分析椎骨的生物力学行为.
- 评估与不同力量和运动相关的缺血和吸收风险.
- 在这种情况下,比较特雷斯卡和·米塞斯的失败标准.
主要方法:
- 使用特雷斯卡和·米塞斯的失败标准进行有限元分析.
- ортодонтика力 (0.6,1.2,2.4 N) 和运动 (入侵,挤出,倾斜,旋转,转移) 的模拟.
- 从9名患者的81个模型中建模逐渐水平牙周病变 (0-8毫米) (405次模拟).
主要成果:
- 特雷斯卡标准在数量上产生了比·米塞斯更高的结果 (1.09-1.21),具有类似的定性发现.
- 增加的正牙力 (1.2 N, 2.4 N) 导致比例较高的压力.
- 旋转,转移和倾斜是最有压力的,特别是在降低周期性质的情况下,增加缺血和吸收风险.
结论:
- 在完整的中,1.2 N是安全的;在减少的中,只有挤出和侵入才能容忍>0.6 N.
- 减少的红斑会导致压力度和风险增加,特别是在4毫米的骨损失后.
- 运动类型和牙周损坏程度是正牙治疗计划的关键因素.
相关概念视频
01:16Eccentric Axial Loading in a Plane of Symmetry
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Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
177
01:15Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
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Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
263
01:15Stress: General Loading Conditions
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To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
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