Cranial base growth in different facial types in Class I, II and III orthopedic maxillomandibular relationship - Part 1

Lucelma Vilela PIERI, Kurt FALTIN JUNIOR, Cristina Lúcia Feijó ORTOLANI, Rolf Marçon FALTIN, Márcia Aparecida Alves de ALMEIDA

Aim: to assess the cranial base annual mean growth in different facial types in Class I, II and III orthopedic maxillomandibular relationship. Methods: a random sample of 300 Brazilian Caucasian patients (131 males, 169 females), with 10 years and 2 months (mixed dentition) initial mean age, 14 years and 8 months (second molar occlusion) final mean age and 4 years and 5 months mean observation time was selected at a private clinic in São Paulo - Brazil. There were 118 Class I, 151 Class II and 31 Class III. All 600 lateral cephalometric radiographs were taken using the same x-rays equipment. Ricketts and Schwarz analyses modified by Faltin Jr. were used. The same examiner performed the linear measures (Ba-Na, CC-Na, CC-Ba and CF-Po) in T1 and T2. All facial types and Classes were studied together with the total sample and separated by gender. Levene’s test and Student´s t-test were carried out. Results and Conclusion: the results confirmed Langlade`s results, but showed sexual dimorphism with males growing significantly more than females. This study will be very useful for growth forecast, prognostic and treatment planning in growing patients.

Keywords: Cranial base growth. Facial types. Orthopedic maxillomandibular relationship.

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