A study of cephalometric appraisal of the inheritance of craniofacial pattern in Gorkhas.

ABSTRACT

The phenotypic expression of biologic variability expressed in the craniofacial complex is influenced by constant interplay of heredity and environmental factors. The aim of this study was to observe the pattern of inheritance of cranio-facial complex in Gorkhas. Gorkhas are the original inhabitants of NEPAL in the slopes of HIMALAYAS and they generally marry strictly in their race. 76 individuals from 19 Gorkha families (son, daughter and both parents); were selected. Eight angular (saddle angle, articular angle, gonial angle, N-S-Gn, N-S-Go, SNA, SNB and ANB angles) and four linear (anterior facial height, posterior facial height, overjet and overbite) variables were measured from lateral head cephalograms and the values of the variables were evaluated and compared. It was found that the Inheritance of cranio facial pattern has shown significant coefficient of correlation from mother to offsprings for jarabak ratio, father to son for NS-Gn and NS-Go angle, father to daughter for articular and ANB angles. Different parts of craniofacial complex represents the resultant of morphology and size variation. Each one of these components are in turn influenced by many genetic and environmental factors.