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Keywords

Dental crowding
ClassII malocclusion
Dentoskeletal morphology

Abstract

Aims:  The aims of  this study was to evaluate the relationship of lateral dentoskeletal morphology to the amount of dental crowding in patients with Class II malocclusion. Materials and Methods: Study models and lateral cephalometric radiographs of a Class II malocclusion of 62 Iraqi patients(18-25 years) lived in the center of Mosul City (30males and 32 females), were evaluated.  The sample was divided into two groups according to severity of pretreatment mandibular crowding. Group 1 consisted of 30 patients and have  crowding ≥ 3 mm. Group 2 have  32 patients and crowding Results: Significant differences between  crowding less than 3mm  and crowding groups more than 3mm were seen in posterior facial height ( S-Go) , the angle between sella, nasion and occlusal plane line ( S-N-Ocp) and the angle between sella, nasion and the long axis of lower central incisor (S-N-L1) in males,  while in females, the significant differences were seen in the angle between sella, nasion and the long axis of lower central incisor (S-N-L1) and the angle between Sella–nasion line and mandibular plane(NS- GoMe). The other parameters showed no significant differences. The correlation coefficients of the amount of crowding with all the measurements were studied. Some of them showed a positive  correlation, while others showed a negative one. Conclusions: Subjects with Class II malocclusion and different amount of dental  crowding have no significantly relation with skeletal parameters. Results suggest that dental crowding is independent of the skeletal measurements.
https://doi.org/10.33899/rden.2016.164135
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