Spontaneous facial growth in Pattern II: a longitudinal cephalometric study

Omar Gabriel da SILVA FILHO, Francisco Antônio BERTOZ, Leopoldino CAPELOZZA FILHO, Eduardo César ALMADA

Aim: The current longitudinal cephalometric study investigated the spontaneous alterations in growing Class II, division 1, Pattern II patients. Methods: Forty children (twenty boys and twenty girls) with ages ranging between 6 and 14 years were selected to comprise the sample. The behavior of the apical bases, incisors and facial proile was evaluated on the basis of the following cephalometric measurements: SN.Ba, SNA, SNB, SND, SN.Pog, ANB, NAP, SN.GoGn, SN.PP, SN.Gn, Ar.Go.Gn, 1.PP, 1.NA, 1.SN, IMPA and nasolabial angle. The following measurements were statistically signiicant along growth: SNB, SND, SN.Pog, ANB, NAP, SN.GoGn, SN.Gn, Ar.Go.Gn and IMPA. Results: The results showed that the main quantitative alterations were related to mandibular growth, regardless of gender. The mandible was anteriorly displaced and tended to present a counter-clockwise rotation and consequent decrease in the facial convexity angles. However, the quantitative changes in the cephalometric measurements were not suficient to change the dentofacial morphology during the follow-up period. Conclusion: Therefore, facial morphology seems to be deined early and does not change along growth.

Keywords: Orthodontics. Malocclusion, Angle Class II. Cephalometrics. Growth and development.

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