Background: The study compared and evaluated the wear of enamel opposing monolithic zirconia crowns finished with pol ished and glazed surfaces and also evaluated the surface wear of two different crown types at 3 and 6 months of clinical use. Material and Methods: Eighteen participants (21-45 years) requiring single posterior restorations with healthy opposing natu ral dentition were selected. In all, 20 monolithic zirconia crowns (n= 20) were fabricated: 10- polished (PO), 10- polished and glazed (PG). For wear evaluation, participants were reviewed at 1 week, 3, 6 months following crown cementation. Casts from polyvinyl siloxane impressions were digitized using a blue light-emitting diode scanner and wear analysis was done using 3D superimposition software. The mean wear of enamel, their opposing crown groups were compared at 3 and 6 months using the unpaired T-test. Results: The mean wear of enamel opposing PO and PG group at 3 and 6 months was 0.016 __ampersandsignplusmn; 0.005 mm, 0.023__ampersandsignplusmn; 0.006 mm and 0.021__ampersandsignplusmn;0.005, 0.027__ampersandsignplusmn; 0.006 mm respectively (Statistically significant, p__ampersandsignlt; 0.005). The mean wear of the crown groups at 3 months was 0.013 __ampersandsignplusmn; 0.004 mm (PO) and 0.014 __ampersandsignplusmn; 0.004 mm (PG) (Statistically not significant, p __ampersandsigngt; 0.005). However, after 6 months, the values were 0.018 __ampersandsignplusmn; 0.005 mm (PO) and 0.022 __ampersandsignplusmn; 0.008 mm (PG) which was significant (p__ampersandsignlt;0.005). Conclusions: Glazed crowns showed higher material loss and wear of opposing enamel at 6 months of clinical use. Monolithic Zirconia crowns should be preferably polished and not glazed to avoid opposing enamel wear.