To further assess such differences between groups, we once again performed the analysis comparing the mesofacial versus brachyfacial and then the mesofacial versus dolichofacial groups.
Mesofacial versus dolichofacial shape analysis revealed significant shape differences (p = 0.
The teleradiographic analysis shows a dolichofacial
biotype and class I skeletal (figure 1).
The study concluded that brachyfacial subjects over dolichofacial and mesiofacials provides increased space for full eruption of the mandibular third molars, so decreased mandibular 3rd molar impactions were seen in brachyfacials as compared to the other two groups.
The results of the present study showed increased incidence of mandibular third molar impaction in patients with a facial axis angle that is less than 87 with dolichofacial (long face) profile.
Anterior facial height is increased suggesting a dolichofacial
growth type with weak muscular system.
It has been reported that the masticatory muscles of dolichofacial subjects are less efficient in generating bite force at a particular point on the lever arm, due to reduced mechanics when compared to brachyfacial subjects.
7) During growth, the musculature of the neck attached to the mandible must lengthen in synchrony, otherwise there is a tendency for a rotational growth pattern and a possible drift of posterior mandibular teeth in compensation, (8) as may be found in dolichofacial subjects.
Based on our measurements and calculations, facial types were designated as either dolichofacial (long face), mesofacial (harmonic), or brachyfacial (short) according to the classification described by Ricketts et al (figure 6).
More than half the patients in our study had dolichofacial characteristics, which is not unusual in Brazil, (12) but no correlation was found between facial type and otitis media ([chi square] = 9.
The facial skeletal pattern, often referred as facial type, when analyzed radiographically, can be classified as dolichofacial (more long and narrow face), brachyfacial (more shorter and wider face), and mesiofacial (intermediate type) (RICKETTS et al.
Based on angular measurements, the subjects were classified as dolichofacial (SN.