Comparison of the position of the incisors in class I and class II malocclusions of Angle

Imelda Alejandra García-Bertrand; Jaime Fabián Gutiérrez-Rojo

2019, Number 62

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Oral 2019; 20 (62)

Comparison of the position of the incisors in class I and class II malocclusions of Angle

García-Bertrand IA, Gutiérrez-Rojo JF

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Language: Spanish
References: 26
Page: 1694-1697
PDF size: 235.41 Kb.

ABSTRACT

Introduction. In the Angle’s skeletal malocclusions, when the maxilla or mandible show a noticeable discrepancy, the remaining structures of the dentofacial complex adapt and modify to disguise this discrepancy, such is the case of the incisors, which present compensations in their angulation depending the malocclusion. Objective. Comparison the position of the lower incisor in Angle class I and class II malocclusions. Material and methods. A total of 200 radiographs were measured, 100 of class I and 100 of class II, facial convexity was measured to classify by malocclusion; likewise, the interincisal angle formed by the axial axis of the central maxillary and mandibular incisors was measured, the protrusion of the lower incisor measuring the incisal edge of the lower incisor to the A-pogonion plane and the inclination of the lower incisor that forms the axial axis of the lower incisor and the A-Pogonion plane (Norm: 22° ± 4.0). Results. In the angle of the inclination of the lower incisor the average in class I was 22 ± 6.62 ° and in class II it was 25.5 ± 7.26°, when comparing the found values with the norm of this angle, they were not found significant statistical differences in class I (t 0.00 p ‹ 1), however, in class II if they were found (t 8.57 p ‹ 0.000). Conclusions. It was found that the lower incisors in the class II malocclusion are proclined, which is attributed to compensations of the dentofacial complex when there is a ske letal malocclusion.

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