CORRELATION BETWEEN VARIOUS VERTICAL DYSPLASIA ASSESSMENT PARAMETERS

Abstract

Introduction: Assessment of vertical jaw relationship is pivotal in orthodontic diagnosis and treatment planning. Different Cephalometric & non-cephalometric methods have been reported to assess the vertical pattern of the patient each having limitations. Purpose of this study was to compare different cephalometric methods used for the assessment of Vertical Skeletal dysplasia.

Materials and Methods: Lateral Cephalograms of 72 subjects (44 females & 28 males) with mean age 17.63+4.19 were taken and analyzed by calculating <SNM, <SNP, <SNO, MMA, Y-axis, SOPA, Facial Ratio & Jarback Ratio. Descriptive statistics for each variable was calculated and co-efficient of correlation (r) was calculated among the variables used.

Results: Statistically significant and highly correlated relationship was found for the <SNM, <SNO & SOPA with rest of the parameters used to assess the vertical pattern of the patient. MMA showed statistically significant correlation with all the parameters except <SNP. Jaraback Ratio & Facial ratio were independent of each other.

Conclusion: 1.Statistically significant correlations were found for <SNM, <SNO & SOPA with all the other parameters used to assess the Vertical jaw discrepancy showing that these parameters could be used interchangeably. 2. <SNP, Jaraback Ratio & Facial ratio should be assessed additionally due to their importance in differential diagnosis.