• Pornchai Jansisyanont D.D.S., M.Sc.
• Pirat Karntiang
• Praewpailin Sompeewong

Objective This study was aimed to find means, ratios and the relations of orbital and perioral
measurements in a group of Thai randomized population.

Materials and methods In this study 117 Thai samples (71 females and 46 males) were measured
as followed, A: interpupillary distance, B: distance between medial canthi, C: distance between lateral
canthi, D: vertical difference between medial and lateral canthi, E: alar base width, F: rest lip width,
G: relation between lip and limbus, and H: means of maxillary central incisors width. Means and ratios
were calculated. Analytic statistics in T-test, One-Way ANOVA and Pearson correlation coefficient
at level of significance .05 were used to compare the means between gender, among descendant and the
relationship of the measurements, respectively.

Results Means of the distances were A = 62.19±4.96 mm, B = 36.03±3.08 mm, C = 94.35±5.09 mm,
D = 4.17±1.45 mm, E = 39.56±3.02 mm, F = 50.16±4.25 mm, G = 2.42±1.75 mm, and H = 8.58±0.50 mm.
The ratios were calculated. Between gender, there were statistically significant difference in A, B, C,
E and F. Among descendant, there was no statistically significant difference. The relations of orbital
and perioral measurements had low correlation.

Conclusions Our results offered the guidelines for surgical correction of facial deformities in Thai
patients. Furthermore, we could estimate the size of maxillary central incisors from the means and
ratios of perioral and orbital measurements in edentulous patients.

(CU Dent J. 2005;28:117-26)