Relationship of Angular And Linear Measurements Between Cranial Base And Jaw Base in Subjects With Skeletal Class-I, Class-Ii And Class-Iii Malocclusion – A Cephalometric Study
Journal Title: IOSR Journal of Dental and Medical Sciences (IOSR-JDMS) - Year 2017, Vol 16, Issue 10
Abstract
The cranial base area of the craniofacial complex has long been of interest to orthodontists and craniofacial anthropologists. The cranial base provides support for the brain and adaptation during growth between the developing neurocranium and viscerocranium. The aims of this investigation was to assess if there is any evidence that the cranial base angle predisposes the jaw base relationship in a Dravidian population, and to gain data specific for this population with particular reference to the angular and linear cranial base morphology. Materials And Methods: The study involved 105 subjects (male:52 ; female:53 : age: 18± 5 SD years) from Chennai who were classified into 3 sagittal discrepancy group on the basis of their ANB angle.A cephalometric analysis of the angular and linear measurements of the cranial and jaw bases was carried out. The morphological characteristics of the cranial and jaw bases in the three groups were compared and assessments were made as to whether a relationship existed between the cranial base and the jaw base discrepancy. Results:Significant differences were found in the cranial base angles in Class II and Class III groups. Increase in cranial base angle inskeletal Class II group resulted in the decrease of SNB by 25%, while in skeletal Class III groupshowed a marked reduction of SNA by 26%. In the linear measurement, skeletal Class III cases presented with increaseof anterior cranial base lengthwith a distinct increase of SNB.Also increase in the posterior cranial baseresulted in increase in mandibular length by 57% in Class III group. Conclusion: Cranial base angle and jaw base were positively correlated in both class II and class III malocclusions, whereas cranial base length and mandibular length had positive correlation in class III malocclusion only.
Authors and Affiliations
Dr. Dinesh Ram Raja M. D. S, Dr. Uma Maheswari M. D. S, Dr. Devaki Vijayalakshmi M. D. S
Keywords
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- EP ID EP239181
- DOI 10.9790/0853-1610016370
- Views 125
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