Effects of the root surface saving condition in autotransplanted tooth to physiological tooth eruption and orthodontic tooth movement

自体移植牙根面保存条件对生理牙萌出及正畸牙移动的影响

基本信息

批准号：
09672096
负责人：
MOHRI Tamaki
金额：
$ 1.79万
依托单位：
Niigata University, School of Dentistry
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

The research purpose is to investigates the effect of the periodontal ligament saving condition to the physiological tooth movement (eruption) and the orthodontic tooth movement of the autotransplanted tooth. The result was arranged in the following.1. The stable anchorage unit for the orthodontic tooth movement and stable reference point for the measurement of tooth position using the titanium implant in the rat maxilla molar part were established.2. The evaluation method for autotransplanted tooth and implant were established using X-ray cephalo and CT.3. Though in the group of immediate transplantation, The organization of the periodontal ligament in the root surface was observed and partial resorption of dental root was observed but the remarkable replacement root resorption was not observed. In the meantime, the following occur in the group of transplanted in not good periodontal ligament saving condition : Inflammation of the pulp, necrosis image and remarkable and inflammatory r … More esorption of dental root and replacement root resorption.4. In the immediate transplantation group, the ransplanted tooth was observed only the slight inflammation, while the inflammation of circumference alveolar bone resorption was observed in the periodontal ligament condition is not good. And, the extrusion of autotransplanted tooth was observed, when saving condition of the periodontal ligament is good. In the meantime, the bone resorption occurred in the circumference when the tooth root dried was transplanted. The similar tendency was also shown on the result of the orthodontic tooth movement group.5. Immunocompetent cell of periodontal ligament are the macrophage or dendritic cell. It was possible to distinguish these by the OX6 immunostaining. In the early reaction of tooth transplantation, it was proven that there is no a clear difference in mesial surface and distal surface.6. Clinical analysis and basic experiment showed the equal tendency, and the autotransplanted tooth seemed to have various medium characteristics with the implant or ankylosed tooth and the normal tooth. Less

研究目的是探讨牙周膜保存条件对自体移植牙生理牙移动（萌出）和正畸牙移动的影响。研究结果如下： 1．正畸牙稳定支抗装置。建立了大鼠上颌磨牙区钛种植体牙位测量的移动和稳定参考点。2．建立了自体移植牙及种植体的X射线评价方法。头颅和CT.3.认为在即刻移植组中，观察到牙根表面牙周膜的组织，并观察到牙根的部分吸收，但未观察到明显的替代牙根吸收。发生在牙周膜保存状况不佳的移植组中：牙髓炎症、坏死图像以及显着的牙根吸收和替换牙根吸收。4。移植组中，移植牙仅有轻微炎症，而在牙周膜状况不佳时，观察到周周牙槽骨吸收炎症，且在保存牙周膜状况时，观察到自体移植牙出现挤压。同时，正畸牙移动组的结果显示，牙根干燥后周周也出现骨吸收。牙周膜的免疫活性细胞是巨噬细胞或树突状细胞，通过OX6免疫染色可以区分它们，在牙移植的早期反应中，证明近中表面和远中表面没有明显的区别。临床分析和基础实验显示出相同的趋势，自体移植牙与种植牙或强直牙和正常牙相比，似乎具有不同的中等特征。