A study of the Craniofacial Characteristics in Class II, Division 1 Patients with Mandibular Retrognathism, using Enlow’s Counterpart Analysis

Renato BIGLIAZZI, Carlos Alberto KESSNER, Kurt FALTIN JR.

A cephalometric study using Enlow’s counterpart analysis was made concerning the evaluation of the craniofacial characteristics in patients with Class II, division 1 malocclusions with mandibular retrognathism. The sample comprised a total of 35 patients (23 female and 12 male), aged 9 on the average. The findings led us to conclude that, in our sample, factors like Aggregate cranial floor/maxilla and ramus/corpus horizontal dimensions at A and B points, Aggregate cranial floor/maxilla and ramus/corpus horizontal dimensions at PrS and Id points, Ramus alignment, Maxillary/Mandibular arches skeletal dimensions at A and B points, Maxillary/Mandibular arches skeletal dimensions at PrS and Id points, PM as compared with ramus-MCF vertical relationships and Curve of Spee were predominantly contributing factors to the mandibular retrusion. MCF alignment, Ramus-oclusal alignment and Gonial angle were neutral factors to the mandibular position. The Ramus/MCF horizontal skeletal dimensions turned out to be the only significant compensatory factor to the mandibular retrusion in these patients. According to Aggregate cranial floor/maxilla and ramus/corpus horizontal dimensions at A and B points factor, we can found the A and B Groups. The Group B patients showed, in their morphologic characteristics, a great number of aggregate correlations to reduce the mandibular retrusion than the Group A patients.

Keywords: Class II Malocclusion. Counterpart analysis. Cephalometry.

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