American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics · 2015
Bone remodeling during orthodontic tooth movement in rats with type 2 diabetes.
Сравнительное исследованиеСтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод пока не подготовлен
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Plut Alja, Sprogar Špela, Drevenšek Gorazd, Hudoklin Samo, Zupan Janja, Marc Janja, Drevenšek Martina
Аннотация
INTRODUCTION: Type 2 diabetes is known to affect bone metabolism. In this study, we aimed to determine the effects of type 2 diabetes on bone remodeling during orthodontic tooth movement.
METHODS: The 48 rats were divided into 4 groups: Wistar control group (n = 8), Goto-Kakizaki (GK) control group (n = 8), Wistar appliance group (n = 16), and GK appliance group (n = 16). The distances between the teeth were measured weekly. On day 42, maxillary alveolar bone specimens were obtained for histologic evaluation and determination of the gene expression levels of the receptor activator of nuclear factor ҡB (RANK), RANK ligand (RANKL), and osteoprotegerin (OPG).
RESULTS: No significant difference was observed in the levels of tooth movement between the 2 appliance groups. After orthodontic force application, the alveolar bone volume and osteoblast surface in the GK rats were diminished compared with those in the Wistar rats. The increase in the osteoclast surface relative to the control groups was 2.4-fold greater in the GK rats than in the Wistar rats. Significant upregulations of the RANK and OPG gene expression levels in the Wistar appliance group were observed. The RANKL/OPG ratio was increased in the GK appliance group compared with the Wistar appliance group.
CONCLUSIONS: Diminished bone formation and slightly increased bone resorption were observed during orthodontic tooth movement in the rats with type 2 diabetes.
METHODS: The 48 rats were divided into 4 groups: Wistar control group (n = 8), Goto-Kakizaki (GK) control group (n = 8), Wistar appliance group (n = 16), and GK appliance group (n = 16). The distances between the teeth were measured weekly. On day 42, maxillary alveolar bone specimens were obtained for histologic evaluation and determination of the gene expression levels of the receptor activator of nuclear factor ҡB (RANK), RANK ligand (RANKL), and osteoprotegerin (OPG).
RESULTS: No significant difference was observed in the levels of tooth movement between the 2 appliance groups. After orthodontic force application, the alveolar bone volume and osteoblast surface in the GK rats were diminished compared with those in the Wistar rats. The increase in the osteoclast surface relative to the control groups was 2.4-fold greater in the GK rats than in the Wistar rats. Significant upregulations of the RANK and OPG gene expression levels in the Wistar appliance group were observed. The RANKL/OPG ratio was increased in the GK appliance group compared with the Wistar appliance group.
CONCLUSIONS: Diminished bone formation and slightly increased bone resorption were observed during orthodontic tooth movement in the rats with type 2 diabetes.
Предметные рубрики MeSH
Alveolar ProcessAnimalsBone RemodelingBone ResorptionDiabetes Mellitus, Type 2Disease Models, AnimalIncisorMaxillaMolarOrgan SizeOrthodontic WiresOsteoblastsOsteoclastsOsteogenesisOsteoprotegerinRANK LigandRatsRats, Inbred StrainsRats, WistarReceptor Activator of Nuclear Factor-kappa BTooth Movement TechniquesUp-Regulation