From Volume 7, Issue 4, October 2014 | Pages 137-139
The aim of this article is to derive an angle using panoramic radiographs which is as reliable as lateral cephalometric norms in determining the skeletal growth pattern. The sample size consisted of 60 OPGs of patients with normodivergent growth pattern evaluated from cephalometric radiographs. The mean Symphyseal Angle (SA) obtained was 134.1 ± 2.1 and correlation tests showed high, negative and statistically significant correlation for both Basal Plane Angle (BPA)
Panoramic radiography was first introduced by Yrjo Paatero of the University of Helsinki in 1961 and demonstrated the right and left anatomic landmarks for bilateral structures in a panoramic view.3 Orthodontic practice utilizes panoramic radiography for information on the teeth, their axial inclinations, maturation periods and surrounding tissues and is considered to be an indispensable orthodontic screening tool.4,5,6 Facial and mandibular asymmetries, bilateral condylar symmetry, bone trabecular pattern and alveolar support to the teeth are of major concern to orthodontists. Similarly, the growth pattern or the divergence of the jaw bases has to be determined in a patient to help decide on the type of mechanics to be employed.
The gonial angle measured from the lateral cephalogram is one of the most common methods of determining jaw divergence. However, the gonial angle has to be validated with other parameters because of its poor reliability as it measures the arithmetic mean of right and left angles.7 Recent studies have concluded that panoramic radiographs can also be used to determine the gonial angle as accurately as lateral cephalograms.8,9
Thank you for visiting Orthodontic Update and reading some of our resources. To read more, please register today. You’ll enjoy the following great benefits:
What's included
