Association between Gingival Recession and Maxillary Central Incisor Proclination in UCLP
会议名称：《中华口腔医学会第14次全国口腔医学学术会议（2012年会）》
会议日期：2012年
学科分类：1003[医学-口腔医学] 100302[医学-口腔临床医学] 10[医学]
关 键 词：gingival recession incisor proclination cleft lip and palate
摘 要：Objective:To investigate whether proclination of the maxillary central incisor neighboring the cleft leads to gingival recession in patients born with unilateral cleft lip and palate(UCLP). Materials and Methods:40 UCLP patients(15 female and 25 male patients;mean age,13.2 years;age range,8-26 years)were retrospectively *** intraoral slides and study casts,changes in gingival recession of the maxillary central incisor adjacent to the cleft were measured to divide the patients into an experimental group (increased)and a control group(not increased).Changes in proclination of the maxillary central incisor close to the cleft were determined from pretreatment and posttreatment lateral ***-sample t-test,correlation analysis and stepwise logistic regression analysis were applied. Results:There were statistically significant differences in maxillary central incisor proclination variation between subjects with and without increased gingival recession(P0.0001).A positive correlation was shown between U1-SN angle, Ul-N-A distance,Ul-N-A angle and gingival recession(P0.01).Bone grafting during treatment resulted in a significant difference in gingival recession(P0.05).. Age,gender,treatment duration were not linked to gingival *** 2 degrees increase in Ul-SN angle presented a 3.263 times greater chance for the occurrence of gingival recession in upper central incisor lying close to the cleft area (odds ratio=3.263,95%CI 1.314-8.103,P=0.0108). Conclusions:Proclination of the upper central incisor adjacent to the cleft area is positively correlated with gingival recession in UCLP *** bone grafting during orthodontic treatment is considered as a significant influential factor for gingival recession on maxillary central incisor and may benefit gingival recession. Ul-SN angle is considered as the strongest predictor of gingival recession.