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Mandibular Orthodotation

1162 Words5 Pages

DISCUSSION Facial patterns are usually variable which could be due to rotation of the jaws. According to schudy(), bjork (), and rickets facial divergence are markedly changed due to mandibular rotation. According to Holdaway the mandibular and maxillary jaw bases change can markedly affects the soft tissue drape. Facial vertical pattern affects facial harmony and attractiveness. Every Angle class includes a large proportion of atypical facial types (Haavikko & Helle, 1974). In this context, orthodontic treat¬ment can favor or disfavor balance by carry out facial changes in the vertical direction of which even lay people can appreciate. Therefore, orthodontist should have an individualized …show more content…

There was no statistically significant difference found between genders and FHR. CLASS I MOLAR RELATION: - Mandibular plane angle: - The mandibular plane angle is the angle between anatomic SN plane and the line drawn along the lower border of the mandible through constructed gonion and menton. Class I subjects had an average of 32.3° ± 5.7° mandibular plane angle (males = 32.6 ± 5.19; females = 32.06±6.22). This value is similar to the Caucasian population and lesser than the Japanese- Brazilian population. Total anterior facial height (TAFH): - The Linear distance from the Nasion to Menton reffered to as TAFH. TAFH for Dravidian population had an average value of 106.13±8.04 (110.23 ± 7.3 mm for males and 103 ± 7.2 mm for females). These values determined for Dravidian population are very close to the lesser values found in the literature for Caucasians (jarabak) and Japanese- brazilian descendants (2014). The values in this study were lesser than the north indian population (Agarwal et al …show more content…

Interpretation of interrelated morphological parameters suggests the existence of certain patterns in growth direction. These correlation indicate that high FHR values are associated with the high TPFH, and low values of TAFH and mandibular plane angle. Table VII showing FHR was highly correlating with mandibular plane angle (r = -0.911 and p < 0.001). The findings described by schudy (1965) for hyper divergent and hypo divergent faces and different growth patterns by Jarabak (1985) study are supported by the findings in this study. Also showing growth rotation of the mandible is one of the key factor to determine the growth pattern (Bjork 1969)

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