Abstract
OBJECTIVE:To determine the relationship between the dimensions of the maxillary arch and vertical facial morphology within the Proto-Malay race.DESIGN:A cross-sectional study.SETTING:Orthodontics Department, Faculty of Dentistry, Universitas Sumatera Utara, Medan, Indonesia.PARTICIPANTS:Proto-Malay individuals aged ≥18 years without orthodontic treatment history (n = 104).METHODS:Lateral cephalometric radiographs and maxillary study model were obtained from 104 subjects who had never received orthodontic treatment (45 males and 59 females), aged 18 years, belonging to the Proto-Malay race, with skeletal class I malocclusion, normal overjet and overbite, and complete dentition (except the third molar). The vertical facial morphology was obtained by measuring the Jarabak's ratio on lateral cephalometric radiographs by using CorelDRAW. The study model was used to measure the dimensions of the maxillary arch, which are intercanine width, intermolar width, arch length, and palatal height, by using the Korkhaus modification device.RESULTS:The results showed a significant positive correlation between intercanine and intermolar width and a negative correlation between arch length and palate height with vertical facial morphology in the male and female groups within the Proto-Malay race.CONCLUSION:There is a relationship between the maxillary arch dimension with vertical facial morphology in the male and female groups in the Proto-Malay race.
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