Objective In this research,the relationship between blood estrogen level and periodontitis in rats was studied. Methods Twenty-four female Wister rats were randomly divided into three groups:control group,sham operation group and ovariectomized group. Rat chronic periodontitis model was established by ligating the rat's second molar with a steel wire in the sham operation group and ovariectomized group. Serum estrogen level of the rats was detected respectively. Dental X-ray observation,histological examination and immunohistochemistry were employed for the characterization of rat's chronic periodontitis. Results Compared with both control group and sham operation group,a significant decrease in scrum estrogen level was observed in ovariectomized group (P

Objective In this research,the relationship between blood estrogen level and salivary glands of female rat was studied.Methods Thirty-two female Wister rats were randomly divided into four groups:control group,sham operation group,ovariectomized and injected estradiol benzoate group and ovariectomized group.Menopausal rat model was established by ovariectomy.By testing E2,histological examination and examing Cu,Zn-SOD expression through immunochemical staining,we studied the effects of estrogen decreasing on female rat salivary.Results Compared with control group,sham operation group,ovariectomized and injected estradiol benzoate group,a significant decrease in scrum estrogen level was observed in ovariectomized group(P