Thai dentistsû preferences of maxillary
anterior tooth width proportions and
width to height ratios
Authors :
- Chayaporn Supachartwong D.D.S.
- Chalermpol Leevailoj D.D.S., M.S.D., A.B.O.D., F.R.C.D.T.
Abstract :
Objective The purpose of this survey study was to provide the information about the generally
accepted standards for designing smiles using tooth proportion relationships for Thai dentists.
Materials and methods A smile image was made and adjusted by a computer image manipulation
program. The teeth were adjusted according to three different ratios. They are as follows: normal
(78%), tall (71%) and short (87%) teeth. Each ratio was further conformed according to three
proportions. The three respective proportions are Golden, 70RED and Preston proportion for each ratio.
Eighteen survey sets of two different smiles were constructed. Two-hundred and forty-two Thai
dentists were asked to decide which smile in each set is more preferable. The results were analyzed
with binomial test and Fisherûs Exact test.
Results In normal and tall width to height ratio teeth, no significant difference was found in the
preferred tooth width proportion. For the survey of short†teeth, the golden proportion was the least
preferable. When compared to the group with the same proportion, the normal width to height ratio
teeth were the most preferable. The analysis found that the preferences of Thai dentists may be
influenced by field of main practice, gender and years in practice.
Conclusion The width to height ratio has more influence on the preference of Thai dentists than the
tooth width proportion. The field of main practice, gender and years in practice may also affect some
preferences of Thai dentists.
(CU Dent J. 2014;37:183-96)
Keywords :
proportion; ratio; smile
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