【摘要】 目的:制作不同微笑线的视觉模拟评分调查问卷,对正畸医师与普通人群的微笑线美学观点进行调查,评估微笑线对微笑美观的影响,建立微笑唇齿关系美观参数。方法:(1)选取微笑协调的青年女性,拍摄正位姿势位微笑面像及全口牙列像;(2)使用图片处理软件改变微笑线高度,制成6张具有不同微笑线高度的微笑照片,辅助直观类比标度法制成调查问卷;(3)考评调查问卷的信度和效度,并利用调查问卷对30名正畸医师及50名普通人进行微笑线美学观点调查。结果:(1)不同微笑线的美观评分差异有统计学意义(正畸医师:χ~2=109.596,P<0.01;普通人群:χ~2=151.230,P<0.01);(2)正畸医师与普通人群均认为微笑线在-4.0~2.0mm内的微笑较美观(美观评分均>50分),微笑线高于4.0mm的微笑较不美观(美观评分均<50分),且随着微笑线高度的增加美观程度逐渐降低;(3)正畸医师对微笑线为0mm的微笑美观评分最高,普通人群对微笑线为-2.0mm的微笑美观评分最高。结论:微笑线影响微笑美观,正畸医师与普通人群均认为微笑时牙龈显露量小于2.0mm较美观,牙龈显露量大于4.0mm较不美观。正畸医师认为微笑时显露上中切牙牙冠全长而没有显露牙龈最美观,普通人群认为微笑时上唇覆盖上中切牙牙冠2.0mm最美观。在临床工作中,正畸医师应该加强与患者及家属的沟通,获得医患双方均满意的最佳美学效果。更多还原

【Abstract】 Objective To examine the influence of the smile line on the smile esthetic perceptions of orthodontists and laypeople,using a visual analog scale questionnaire.Methods(1)One photogragh of a smiling young female,displaying first molar to first molar,was constructed.(2)The smile line height was modified digitally in 2.0mm increments,from-4.0mm to 6.0mm.(3)Using a visual analog scale(VAS),30 orthodontists and 50 laypeople rated the attractiveness of the six smiles with different smile line.Results(1)There were significant differences in the median esthetic scores for both orthodontists and laypeople.(orthodontists:χ~2=109.596,P<0.01;laypeople:χ~2=151.230,P<0.01).(2)Both orthodontists and laypeople considered smiles with smile line height within the range of-4.0mm to 2.0mm to be pleasant,smiles with smile line height larger than 4.0mm to be unpleasant.(3)Orthodontists rated the smile with smile line height of 0 mm as the most attractiveness,laypeolple rate the smile with smile line height of-2.0 mm as the most attractiveness.Conclusion The smile line height had influence on smile esthetics.Both orthodontists and laypeople shared the same opinion that smiles with gingival display less than 2.0mm were pleasant,while smiles with gingival display more than 4.0mm were unpleasant.orthodontists considered that the smile revealing 100%of the maxillary central incisors’crown height without gingival display to be most attractive,while laypeople judged the smile with upper lip coverage 2.0 mm of the maxillary central incisors’crown as most attractiveness.In clinical practice,orthodontists should enhance communication with patients to obtain the best aesthetic effect更多还原