 60 patients treated by an experienced orthodontist had their occlusions assessed using the PAR index. With follow-up casts taken at least 6.5 years after retention appliance removal, divided into three subgroups based on Jeroback facial height quotient, mean weighted PAR scores calculated for each stage and subgroup, mean absolute and percentage occlusal changes calculated for the post-treatment period, and the relationship between post-treatment to occlusal change in pretreatment vertical facial. Patton studied. This article was authored by Pinto Neal, Woods Michael, and Crawford Edward.