Malocclusion is the departure from normal relationship between teeth in
the same and opposite arch.Different authors have described class III in
different terms.Heterogeneity of phenotype and variation in clinical
severity diversify class III malocclusion. Globally the prevalence is
within 0%-26.7% in different populations. Prevalence in Asians is higher
for Angles class III malocclusion.Interaction of innate or genetic and
environmental leads to class III malocclusion. Treating a malocclusion
of class III nature is a complex problem because the patient's pattern
of growth is unpredictable and unfavourable. Decision should be made
either to treat or wait till the growth is over in cases of developing
class III condition. If the patient is non-growing then the severity of
Class III is assessed and accordingly treatment plan is devised.