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Introduction: Palatal morphology plays an important role in defining the skeletal and facial patterns of an individual. Different individual presents with different height, width, and length of the palate. Orthodontic treatment also causes change in palatal dimensions. Thus, understanding the variation in palatal morphology in various malocclusions is important.

Objective: To compare palatal morphology between Angle’s Class I and Class II division 1 malocclusions.

Materials and Method: The study was done on 110 study models belonging to 38 (34.55%) male and 72 (65.45%) female comprising of 55 Class I and 55 Class II division 1 malocclusions meeting the inclusion criteria. The samples were collected from the pretreatment records of the Department of Orthodontics. Measurements of palatal height, palatal width, and palatal height index as defined by Korkhaus were done using digital Vernier caliper. Mean values of each variable were calculated and compared between the two malocclusion groups. Independent sample t-test was performed to analyse the significant difference at P ≤ 0.05.

Result: Korkhaus Palatal Index was found to be significantly larger in Class II division 1 malocclusion 45.06±4.94 (%) as compared to Class I malocclusion 42.58±3.21 (%). This was because of the deficient transverse development of maxillary arch in Class II division 1 malocclusion in relation to palatal vault development.

Conclusion: Palatal morphology varies between Angle’s Class I and Class II division 1 malocclusions in Nepalese adults. This variation could be an important factor in diagnosis, treatment planning, and long-term stability of the orthodontic treatment.

Angle’s classification of malocclusion; korkhaus index; palatal morphology.