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Dynamic Evaluation of Orthodontically-Induced Tooth Movement, Root Resorption, and Alveolar Bone Remodeling in Rats by in Vivo Micro-Computed Tomography.
Zhou, Jianping; Yang, Fengxue; Xu, Xiaolin; Feng, Gang; Chen, Jun; Song, Jinglin; Dai, Hongwei.
Afiliação
  • Zhou J; Department of Orthodontics, Stomatological Hospital of Chongqing Medical University, Chongqing, China (mainland).
  • Yang F; Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China (mainland).
  • Xu X; Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China (mainland).
  • Feng G; Department of Orthodontics, Stomatological Hospital of Chongqing Medical University, Chongqing, China (mainland).
  • Chen J; Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China (mainland).
  • Song J; Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China (mainland).
  • Dai H; Department of Orthodontics, Stomatological Hospital of Chongqing Medical University, Chongqing, China (mainland).
Med Sci Monit ; 24: 8306-8314, 2018 11 18.
Article em En | MEDLINE | ID: mdl-30448850
ABSTRACT
BACKGROUND The aim of this study was to dynamically evaluate tooth movement, root resorption, and remodeling of alveolar bone using different forces to cause tooth movement in rats. MATERIAL AND METHODS 12-week-old male Sprague-Dawley rats were selected. Nickel-titanium (Ni-Ti) coil springs (20 g, 50 g, and 100 g forces) were placed for mesial movement of the left first maxillary molar teeth. Tooth movement, root resorption, and microarchitectural parameters of the trabecular bone were evaluated by in vivo micro-CT. Histological examination was used to observe the root resorption, alveolar bone remodeling, and changes in osteoclasts from day 0 to day 14. RESULTS The tooth movement distance increased significantly over the initial 3 days in the 3 groups. The 20 g force group showed more tooth movement than in the 50 and 100 g force groups after 14 days (P<0.05). From days 7 to 10, root resorption lacunae appeared in the 3 groups and then stabilized, and the 100 g force group produced more lacunar resorption than in the anther 2 groups (P<0.05). Compared to day 0, the trabecular thickness and bone volume fraction on the pressure side gradually decreased from day 7 to day 14. The structure model index increased significantly from day 3 to day 14. Histological examination showed remarkable root resorption craters and osteoclasts positive for tartrate-resistant acid phosphatase in the root resorption lacunae in the 50 g and 100 g groups from day 7 to day 14. CONCLUSIONS A 100 g heavy force can be used to establish a root resorption model in rats.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Reabsorção da Raiz / Mobilidade Dentária / Técnicas de Movimentação Dentária / Perda do Osso Alveolar Limite: Animals Idioma: En Revista: Med Sci Monit Assunto da revista: MEDICINA Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Reabsorção da Raiz / Mobilidade Dentária / Técnicas de Movimentação Dentária / Perda do Osso Alveolar Limite: Animals Idioma: En Revista: Med Sci Monit Assunto da revista: MEDICINA Ano de publicação: 2018 Tipo de documento: Article