Orthodontic tooth movement at different stages of adolescent female menstrual cycle
10.3969/j.issn.2095-4344.2014.15.007
- VernacularTitle:青少年女性月经周期不同阶段加力对正畸牙移动的影响
- Author:
Bin WANG
;
Xi YANG
;
Jianping ZHOU
;
Gang FENG
;
Hongwei DAI
;
Lan HUANG
- Publication Type:Journal Article
- Keywords:
orthodontics;
menstrual cycle;
ovulation period;
estrogen
- From:
Chinese Journal of Tissue Engineering Research
2014;(15):2332-2337
- CountryChina
- Language:Chinese
-
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 smal er 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 maxil a. By using self-control method, these female patients with their maxil ary 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 distal y 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.
