Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (15): 2332-2337.doi: 10.3969/j.issn.2095-4344.2014.15.007

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Orthodontic tooth movement at different stages of adolescent female menstrual cycle

Wang Bin1, Yang Xi1, Zhou Jian-ping2, Feng Gang2, Dai Hong-wei2, Huang Lan2   

  1. 1 Stomatology College, Chongqing Medical University, Chongqing 400015, China; 2 Department of Orthodontics, Affiliated Stomatology Hospital, Chongqing Medical University, Chongqing 400015, China
  • Online:2014-04-09 Published:2014-04-09
  • Contact: Huang Lan, M.D. Associate chief physician, Department of Orthodontics, Affiliated Stomatology Hospital, Chongqing Medical University, Chongqing 400015, China
  • About author:Wang Bin, Studying for master’s degree, Stomatology College, Chongqing Medical University, Chongqing 400015, China

Abstract:

BACKGROUND: Estrogen has an effect on orthodontic tooth movement. Currently, only animal experiments show that the lower estrogen levels, the greater the amount of orthodontic tooth movement; the higher
estrogen levels are, the smaller the amount of orthodontic tooth movement is.
OBJECTIVE: To investigate effects of orthodontic force applied on orthodontic tooth movement at different stages of menstrual cycle among young female patients.
METHODS: Twelve young female patients were included in this study, aged 14-18 years old. They already have regular menstrual cycle, and need to extract the first premolar in the maxilla. By using self-control method, these female patients with their maxillary canine at both sides were randomly divided into two groups: orthodontic force at ovulatory period and orthodontic force at menstrual period. Micro-implant anchorage was implanted to the distally moving canine. Orthodontic force was given to the group of ovulatory period 2 weeks after the force was given at menstrual period. Dentition models were taken at day 0 and 28 after force, to prepare a superhard plaster model using silastic impression materials. Between these two groups, the distances of the canine distal movement were measured and statistical analysis was performed with GraphPad Prism5 software.
RESULTS AND CONCLUSIONS: The distances of the canine distal movement in the group of orthodontic force at menstrual period were greater than that in the other group (P < 0.05). The orthodontic teeth with the application of orthodontic force at menstrual period move faster than that with the application of orthodontic force at ovulatory period, thus effectively shortening orthodontic treatment.



中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


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Key words: orthodontics, menstrual cycle, ovulation period, estrogen 

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