Objective:To investigate the difference of condylar bone density,volume and surface area in adult female patients with different vertical skeletal features of skeletal Class Ⅱ.Methods:This study was a retrospective case-control study.150 female patients aged 18-30 years were included as the subjects.Lateral cephalic radiographs were measured and the cases with high angle,average an-gle and low angle of skeletal Class Ⅱ were included and respectively grouped(n=50),the CBCT images were collected,the condyles were reconstructed by Mimics Reseach 20.0 software,the bone density,volume and surface area of the condyles were measured.Univa-riate analysis of variance(ANOVA)was used to compare the difference of condyle measurements among the 3 groups.Results:The overall difference of condylar bone density,volume and surface area among the 3 groups were statistically significant(P＜0.05).Pair-wise comparison showed that the condyle bone mineral density in high angle group was lower than that in average angle group(P＜0.05),in average angle group was lower than that in low angle group(P＜0.05),in high angle group was lower than that in low angle group(P＜0.001).Condyle volume and surface area in high angle group were lower than those in low angle group(P＜0.05),in aver-age angle group was lower than those in low angle group(P＜0.001),in high angle group was lower than those in average angle group(P＞0.05).Conclusion:The condyle bone density,volume and surface area of the different vertical skeletal features of skeletal class Ⅱ in adult female patients are different.

OBJECTIVE: To investigate the prevalence and relevant influencing factors of gynecological diseases of grassroot level female medical staffs. METHODS: A total of 2 308 female medical workers from county, town and village in hengxian County of Guangxi Zhuang Autonomous Region were selected as study subjects by cluster sampling method. The basic information, occupational history, reproductive health and fertility of these subjects were investigated by Reproducetive Health Survey Questionnaine of Female Workers. RESULTS: The total prevalence of gynecological diseases in female medical staffs was 21.6%. Among them, the prevalence of genital tract infections was 15.6%, and gynecological tumors was 6.0%. The top three gynecologic diseases were vaginitis(9.2%), uterine fibroids(4.3%) and cervicitis(3.5%). Multivariate logistic regression analysis results indicated that the younger the patients, the higher the risk of reproductive tract infectious diseases(P<0.01), and the lower the risk of gynecological tumors(P<0.01). The risk of reproductive tract infectious diseases and gynecological tumors in married patients was higher than that in unmarried staffs(P<0.05). The higher the number of abortions, the higher the risk of reproductive tract infectious diseases and gynecological tumors(P<0.01). The risk of reproductive tract infectious diseases was higher and the risk of gynecological tumors was lower in female shift workers than that of non-shift workers(P<0.05). CONCLUSION: Vaginitis, uterine fibroids and cervicitis are the main gynecological diseases in grassroot level female medical staffs. The incidence of gynecological diseases is related to age, history of marriage, childbirth and abortion, and work-shifts.