K Elias M, Pudi Sriharsha, C Tirumala Ravali, Gade Rajasekhar Reddy, Yemineni Bhavan Chand
Prosthodontics, Care Dental Clinic, Eloor, IND.
Prosthodontics and Crown & Bridges, MNR Dental College and Hospital, Hyderabad, IND.
Cureus. 2020 Jan 14;12(1):e6650. doi: 10.7759/cureus.6650.
Assessment of dentofacial asymmetries and other discrepancies that can affect the horizontal reference lines should be considered initially as a part of the esthetic diagnosis. Some variations of facial asymmetry are not considered an esthetic liability. So the aim of the present study is to determine a layperson's preference regarding transverse occlusal plane (TOP) orientation in fabrication of a complete denture.
A total of 100 subjects who are edentulous and have enrolled for complete denture fabrication were selected. Photograph of the patient's face was obtained from the frontal perspective on the day of try-in. The image obtained was edited to orient the occlusal plane in three different cants, zero degree, two degrees, and four degrees to the inter-pupillary line (IL) and presented to the patient. The obtained results were statistically analyzed.
The observed data was analyzed using Friedman's test and Wilcoxon test was used for comparing ordinal data between groups. There was a statistically significant difference in acceptance depending on angulation, χ2(2) = 183.2, p = 0.0001.
A cant of two degrees is not perceived by the subject but some subjects' preference of occlusal plane may be altered according to the commissural canting which cannot be incorporated in complete denture fabrication.
在美学诊断中，最初应考虑评估牙颌面不对称性以及其他可能影响水平参考线的差异。某些面部不对称的变化并不被视为美学缺陷。因此，本研究的目的是确定在全口义齿制作中，普通民众对横牙合平面（TOP）方向的偏好。
总共选择了100名无牙颌且已登记制作全口义齿的受试者。在试戴当天从正面拍摄患者面部照片。对获得的图像进行编辑，将牙合平面与瞳孔间线（IL）呈三种不同倾斜度（零度、二度和四度）进行定位，并展示给患者。对所得结果进行统计学分析。
使用Friedman检验分析观察到的数据，并使用Wilcoxon检验比较组间的有序数据。根据倾斜角度，接受度存在统计学上的显著差异，χ2(2)=183.2，p = 0.0001。
受试者未察觉到二度倾斜，但部分受试者对牙合平面的偏好可能会根据口角倾斜度而改变，而这无法纳入全口义齿制作中。
