The mechanism of Tissue Response in Orthodontic Tooth Movement

正畸牙移动的组织反应机制

• 批准号: 07407059
• 负责人: ISHIKAWA Hiroyuki
• 金额: $ 15.04万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07407059/
• 关键词: Tooth Movement; Osteoc last; Degenerated Tissue; Periodontal Ligament; Stress Analysis; Elastic modulus; Tissue Response; Bone Resorption; 背部骨吸収; 血管分布; 荷重試験; Ni-Ti-合金; 超弾性; 組織変化; 応力分布; 有限要素法; 圧縮試験装置; ヤング率

The purpose of this study was to investigate the mechanism of tissue response in orthodontic tooth movement from histological observation, the analysis of stress distribution, and the analysis of tooth movement. The results obtained ware :1.Rear bone resorption seemed to depend on stress distribution and circulatory conditions in the perforating channels from bone marrow to periodontal space.2.The remaining bone and degenerated tissue in response to initial orthodontic force influenced stress distribution in the periodontal tissue due to the subsequent readjusted force.3.The specimen-specific finite element analysis showed that the osteoclast appearance and the formation of degenerated tissue are closely related to a specific level of the compressive stress in the periodontal ligament.4.The elasticity of the periodontal ligament was evaluated with a mechanical test machine developed. The elastic moduli of the periodontal ligament determined from the tensile and compressive tests under quasi-static conditions were 0.37(]SY.+-。[)0.11 and 0.079(]SY.+-。[)0.017MPa, respectively.5.The alveolar bone resorption rate was estimated from the clinical measurements of tooth movement and the finite eIement analysis. The rate to a unit stress was found to be 0.58(]SY.+-。[)0.16 mum/(kPa・day).

本研究旨在从组织学观察、应力分布分析、牙齿移动分析等方面探讨正畸牙齿移动中的组织反应机制。结果表明：1.后牙骨质吸收取决于牙周骨穿通通道的应力分布和循环状况; 2.初始正畸力作用下残留的骨质和退变组织会影响牙周组织的应力分布，进而影响后续的再调整力; 3.牙周组织的有限元分析表明，破骨细胞的出现和退变组织的形成与牙周膜中特定的压应力水平密切相关; 4.利用自行研制的牙周膜弹性测试仪对牙周膜的弹性进行了测试。在准静态条件下由拉伸和压缩试验确定的牙周膜的弹性模量为0.37（± SY）。[）0.11和0.079（]SY ±. [）分别为0.017MPa。5.牙槽骨吸收率通过牙齿移动的临床测量和有限元分析来估计。发现单位应力的速率为0.58（]SY ±-。[）0.16 μ m/（kPa·day）。

项目成果

Seiki Yamanami: "Analysis of alveolar bone remodeling on orthodontics-Comparative study on alveolar bone resorption rate of moved teeth and fixed teeth-" Tecnical Report of IEICE. MBE-96. 19-24 (1996)

山波精树：《正畸学中牙槽骨重塑分析-移动牙与固定牙牙槽骨吸收率的比较研究-》IEICE技术报告。

Morimasa Nishihira: "Measurement of elastic properties of periodontal ligament." Tecnical Report of IEICE. MBE-96. 45-50 (1996)

Morimasa Nishihira：“牙周膜弹性特性的测量。”

西平守正: "実験的歯科矯正における破骨細胞出現部位の応力解析" 顎顔面バイオメカニクス学会誌. 2・2(発表予定). (1996)

Morimasa Nishihira：“实验正畸中破骨细胞出现部位的应力分析”颌面生物力学学会杂志2·2（待发表）。

西平 守正: "引張および圧縮試験による歯根膜弾性率の測定" 電子情報通信学会技術研究報告. MBE・97. 75-80 (1997)

Morimasa Nishihira：“通过拉伸和压缩试验测量牙周膜弹性模量”IEICE MBE・97（1997）。

Hayashi, K.: "Springer-Verlag" Computational Biomechanics. 277 (1996)

Hayashi, K.：“Springer-Verlag”计算生物力学。