Abstract

BEDOYA RODRIGUEZ, Antonio; OSORIO PATINO, Julio César  and  TAMAYO CARDONA, Julián Andrés. TERMINING FACIAL BIOTYPE BASED UPON PHENOTYPIC FEATURES THROUGH STRUCTURAL EQUATION MODELING: A STUDY OF THREE ETHNIC. Rev Fac Odontol Univ Antioq [online]. 2013, vol.25, n.1, pp.131-146. ISSN 0121-246X.

INTRODUCTION: the various phenotypic characteristics may be grouped; also, their individual and collective influence may be determined when defining a biotype. Structural equation modeling (SEM) is based on causal relations so that the change in a variable is supposed to produce a change in another variable. This model was used to validate causal relations using different types of mediating variables: masticatory force, transverse measures, dental arches, bizygomatic width, and morphological face height. METHODS: this study included 197 preteens between 12 and 14 years of age with dental neutroclusion, distributed like this: 33% mestizos, 35% of African descent, and 32% indigenous. The hypothetical model was statistically tested through structural equation modeling. RESULTS: the model is well fitted to the data since goodness of fit indicators such as RMSEA = 0.078, RMR index magnitude = 0.061, and CIF = 0.988 were within the expected limits. The parameters were significant to a 5%, except for facial index with masticatory force. Factor loads ranged from 0.55 to 0.92 and negative factor loads between the facial index and dental arch transverse measures (—0.60). CONCLUSIONS: this model shows that the variable that best correlates with facial biotype is masticatory force (0.82), followed by dental arches relation (0.73), this being a moderate correlation.

Keywords : anthropometry; odontometry; dental arches; masticatory force; facial height; facial width.

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