Comparative analysis of the anterior and posterior length and deflection angle of the cranial base, in individuals with facial Pattern I, II and III

Guilherme THIESEN, Guilherme PLETSCH, Michella Dinah ZASTROW, Caio Vinicius Martins do VALLE, Karyna Martins do VALLE-COROTTI, Mayara Paim PATEL, Paulo Cesar Rodrigues CONTI

Objective: This study evaluated the variations in the anterior cranial base (S-N), posterior cranial base (S-Ba) and delection of the cranial base (SNBa) among three diferent facial patterns (Pattern I, II and III). Method: A sample of 60 lateral cephalometric radiographs of Brazilian Caucasian patients, both genders, between 8 and 17 years of age was selected. The sample was divided into 3 groups (Pattern I, II and III) of 20 individuals each. The inclusion criteria for each group were the ANB angle, Wits appraisal and the facial proile angle (G’.Sn.Pg’). To compare the mean values obtained from (SNBa, S-N, S-Ba) each group measures, the ANOVA test and Schefé’s Post-Hoc test were applied. Results and Conclusions: There was no statistically signiicant diference for the delection angle of the cranial base among the diferent facial patterns (Patterns I, II and III). There was no signiicant diference for the measures of the anterior and posterior cranial base between the facial Patterns I and II. The mean values for S-Ba were lower in facial Pattern III with statistically signiicant diference. The mean values of S-N in the facial Pattern III were also reduced, but without showing statistically signiicant diference. This trend of lower values in the cranial base measurements would explain the maxillary deiciency and/or mandibular prognathism features that characterize the facial Pattern III.

Keywords: Cranial base. Orthodontics. Maxillofacial development. Face.

How to cite: Thiesen G, Pletsch G, Zastrow MD, Valle CVM, Valle-Corotti KM, Patel MP, Conti PCR. Comparative study of the flexure, anterior and posterior lengths of the cranial base in facial patterns I, II and III patients. Dental Press J Orthod. 2013 Jan-Feb; 18(1):69-75.

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