Harati Mahsa, Mostofi Shahbaz Naser, Jalalian Ezzatollah, Rezvani Gholamreza
Craniomaxillofacial Research Center, Azad University, Tehran, Iran.
Department of Fixed Prosthodontics, Tehran Dental Branch, Islamic Azad University, Tehran, Iran.
Dent Res J (Isfahan). 2013 Nov;10(6):723-7.
The purpose of the present study was to discuss some new concepts of the desirable characteristics of smile tooth display. Due to the increasing application of cosmetic dental treatments, there is an increasing need for better understanding of the esthetic principles.
In the present descriptive study, with 212 participants, included were patients with no history of orthodontic treatment, loss or prosthetic replacement of anterior teeth, extracted teeth, lips with asymmetry or a history of trauma. Chi-square test was used to determine possible significances in the relation of smile line to Angle occlusion class, overbite and overjet and arch form. A P level of <0.05 was set as to be significant.
Chi-square test indicated that there was a significant difference between the smile design and overbite, overjet and gender but no statistically significant association was found between the smile design and crossbite, molar Angle classification and arch form.
Within the limitations of such studies, it might be concluded that there is a significant and important relation between some occlusal parameters and smile design, which must be considered.
本研究的目的是探讨有关理想微笑牙齿显露特征的一些新概念。由于美容牙科治疗的应用日益增加，对美学原则的更好理解的需求也日益增长。
在本描述性研究中，纳入了212名参与者，这些参与者无正畸治疗史、无前牙缺失或修复史、无拔牙史、无唇部不对称或外伤史。采用卡方检验来确定微笑线与安氏咬合分类、覆合、覆盖及牙弓形态之间关系的可能显著性。设定P值<0.05为具有显著性。
卡方检验表明，微笑设计与覆合、覆盖及性别之间存在显著差异，但在微笑设计与反合、磨牙安氏分类及牙弓形态之间未发现统计学上的显著关联。
在此类研究的局限性范围内，可以得出结论，一些咬合参数与微笑设计之间存在显著且重要的关系，必须予以考虑。
