An essential aspect of facial attractiveness is dental appearance. The existence or absence of buccal corridors is a potential key aspect of a smile. They are the spaces that exist when a patient smiles between the corners of the lips and the facial surfaces of the back teeth, which significantly influence the aesthetics of smiles. It was found that changes in the buccal corridor due to palatal expansion was controversial. Aim: To evaluate the changes in buccal corridor space and its effects on esthetics before and after orthodontic treatment in individuals with constricted maxillary arch. Study Design: It was photographic follow up study which was carried out in 58 patients (33 females and 25 males) who had constricted maxillary arch. Records obtained were divided into three groups on the basis of time duration i.e pre-treatment, Post-treatment and follow up after 2 years of treatment. Results: Significant difference can be seen wrt interlast visible maxillary teeth distance, Buccal corridor space wrt last visible maxillary teeth between pre-treatment, Post treatment and after two years (P<0.05) and a highly significant difference can be seen wrt total smile area on smile analysis(p<0.001). Along with this highly significant difference can be seen wrt intercanine width between pre and post treatment but difference in changes in inter-premolar and intermolar distance were highly significantly seen between pre and post treatment and between post treatment and after two years of follow-up(p<0.001). Significant changes can even be seen in posterior rugae width between pre and post treatment. (p<0.05) Conclusion: It can be concluded that cases of constricted maxillary arch treated with various expansion procedures show relapse after two years along with the change in buccal corridor space which directly affects the esthetics.