Majeed Muhammed Irfan, Haralur Satheesh B, Khan Muhammed Farhan, Al Ahmari Maram Awdah, Al Shahrani Nourah Falah, Shaik Sharaz
Department of Prosthodontics, College of Dentistry, King Khalid University, Kingdom of Saudi Arabia.
College of Dentistry, King Khalid University, Kingdom of Saudi Arabia.
Open Access Maced J Med Sci. 2018 Mar 28;6(4):680-686. doi: 10.3889/oamjms.2018.082. eCollection 2018 Apr 15.
Determining and restoring physiological vertical dimension of occlusion (VDO) is the critical step during complete mouth rehabilitation. The improper VDO compromises the aesthetics, phonetics and functional efficiency of the prosthesis. Various methods are suggested to determine the accurate VDO, including the facial measurements in the clinical situations with no pre-extraction records. The generalisation of correlation between the facial measurements to VDO is criticised due to gender dimorphism and racial differences. Hence, it is prudent to verify the hypothesis of facial proportion and correlation of lower third of the face to remaining craniofacial measurements in different ethnic groups. The objective of the study was to evaluate the correlation of craniofacial measurements and OVD in the Saudi-Arabian ethnic group.
Total of 228 participants from Saudi-Arabian Ethnic group were randomly recruited in this cross-sectional study. Fifteen craniofacial measurements were recorded with modified digital Vernier callipers, and OVD was recorded at centric occlusion. The obtained data were analysed by using the Spearman's correlation and linear regression analysis.
The Mean OVD in male participants was higher (69.25 ± 5.54) in comparison to female participants (57.41 ± 5.32). The craniofacial measurement of Exocanthion-right labial commissure and the Mesial wall of the right external auditory canal-orbitale lateral had a strong positive correlation with VDO. The strong correlation was recorded with a trichion-upper border of right eyebrow line and trichion-Nasion only in males. Meanwhile, the length of an auricle recorded the positive correlation in female participants.
Being simple and non-invasive technique, craniofacial measurements and linear equations could be routinely utilised to determine VDO.
确定并恢复生理牙合垂直距离（VDO）是全口义齿修复的关键步骤。不当的VDO会损害义齿的美观、语音功能和功能效率。人们提出了各种方法来确定准确的VDO，包括在没有拔牙前记录的临床情况下进行面部测量。由于性别差异和种族差异，面部测量与VDO之间相关性的普遍适用性受到批评。因此，谨慎地验证不同种族面部比例以及面部下三分之一与其余颅面部测量之间相关性的假设是明智的。本研究的目的是评估沙特阿拉伯族人群颅面部测量与牙合垂直距离（OVD）之间的相关性。
在这项横断面研究中，随机招募了228名沙特阿拉伯族参与者。使用改良的数字游标卡尺记录15项颅面部测量数据，并在正中牙合时记录OVD。使用Spearman相关性分析和线性回归分析对获得的数据进行分析。
男性参与者的平均OVD（69.25±5.54）高于女性参与者（57.41±5.32）。右眼外眦点至唇 commissure的颅面部测量值以及右外耳道眶外侧壁的内侧壁与VDO呈强正相关。仅在男性中，眉间至右眉线上缘和眉间至鼻根的测量值与VDO呈强相关性。同时，耳廓长度在女性参与者中呈正相关。
作为简单且无创的技术，颅面部测量和线性方程可常规用于确定VDO。
