Jahanbin Arezoo, Pezeshkirad Hossein
Department of Orthodontics, Mashhad University of Medical Sciences, Iran.
Indian J Dent Res. 2008 Jul-Sep;19(3):204-7. doi: 10.4103/0970-9290.42951.
The esthetic of smile is influenced by such features as the amount of incisor show and gingival display.
The purposes of this study were to compare smile esthetics among normal occlusion and non extraction patients, assess upper lip height in two groups and discuss how this feature relate to smile esthetics.
We therefore conducted a case control study to determine the mentioned aims.
Thirty females with non extraction orthodontically treated occlusions and thirty three with normal occlusions were selected. Standardized black and white photographs of their posed smiles were evaluated by a panel of 5 men and 5 women of varied vocations by use of visual analogue scale. Then upper lip height of the two groups were measured from photographs.
Smile esthetics and differences among the two groups were subjected to ANOVA and Mann-whitney test was used to compare upper lip height in them.
This study showed that upper lip height did not differ among the 2 groups ( P = 0.98). Also there were no significant differences in the distribution of fair,good and very good smiles among the two groups.
This study demonstrates that the non extraction orthodontic treatment does not influence smile esthetics.
微笑的美观度受切牙显露量和牙龈暴露等特征影响。
本研究旨在比较正常咬合和非拔牙患者的微笑美观度，评估两组患者的上唇高度，并探讨该特征与微笑美观度的关系。
因此，我们进行了一项病例对照研究以确定上述目标。
选取30名接受非拔牙正畸治疗的女性患者和33名正常咬合的女性患者。由5名男性和5名从事不同职业的女性组成的小组使用视觉模拟量表对她们摆好姿势微笑的标准化黑白照片进行评估。然后从照片中测量两组患者的上唇高度。
对微笑美观度及两组间差异进行方差分析，使用曼-惠特尼检验比较两组的上唇高度。
本研究表明，两组患者的上唇高度无差异（P = 0.98）。两组间在微笑美观度为一般、良好和非常好的分布上也无显著差异。
本研究表明，非拔牙正畸治疗不影响微笑美观度。
