Korean J Orthod.  1982 Dec;12(2):79-94.

A roentgenocephalometric study of korean soft tissue profile

• Oh CS

Abstract

The purpose of orthodontic treatment is achieve normal occlusion and good facial esthetics for individual patients. To produce harmonized facial balance, treatment planning for patient who require ortopdontic treatment should include both a hard tissue and soft tissue cephalometric analysis. Author studied to derive the normal standards of soft tissue profioe in Koreans by roentgenocephalometric analysis. For this study 12 soft tissue profile landmarks were plotted and 23 linear length, 9 soft tissue thickness, 8 vertical height length, 12 angles of soft tissue profile, and 3 vertical propotion were measured. The subjects consisted of 166 males and 209 females from 7 to 19 years with nirmal occlusion and acceptable profiles, and were divided into five groups according to age. The obtainde results were as follows; 1. From the basis of N-Pg (Nasion-Pogonion) plane, the growth of facial soft tissue in the middle region esecially nose arce was greater than others facial region. 2. From the basis of G-Pog' (Glabella-soft tissue Pogoinon) plane, the values of linear measurement of soft tissue Nasion and Inferior labial sulcus decreased and nose tip grew forward as growing older. 3. The growth of the facial soft tissue thickness was greates in superior labial sulcus and the thikness of soft tissue nadion gradually became thinner as growing old. 4. The thickness of upper and lower lip was 14.47mm, 14.57mm in adult male, 12.76mm, 13.78mm in adult female. 5. The soft tissue thickness of the lower lip was thicker than that of upper lip in all age groups and both sexes. 6. The vertical length of the upper and lower lips were 25.04mm, 49.97mm in adult male and 23.50mm, 48,39mm in adult female. 7. By the significant test, there were significant difference between male female in fifth adult group on all vertical length measurements of lower face. 8. In fifth adult group, the perpendicular distance from LS, LI to Steiner's line and Ricketts' esthetic line were as follow; Steiner line to LS, LI were 7.98mm, 5.84mm in male. Steiner line to LS, LI were 6.71mm, 5.08mm in female. Ricketts' esthetic line to LS, LI were -0.40mm, 1.72mm in male. Ricketts' esthetic line to LS, LI were -1.38mm, 0.65mm in female. 9. In fifth adult group, the facial convexity angle and lower facial component angle were 171.17degrees, 142.94degrees in male and 172.5 degrees, 144.41degrees in female.

MeSH Terms

Adult
Esthetics
Female
Humans
Lip
Male
Nose