Objectives: The aim of this study was to evaluate and compare the occlusal precision of Polymethylmethacrylate provisional crowns fabricated using CAD/CAM Milling and 3D Printing method. Materials and methods: In this study, tooth preparation on Mandibular Molar was done on 12 patients, followed by printing and milling of the provisional crowns and thereby, intraoral scanning of pre and post adjustment of the provisional crowns. 24 Provisional crowns were grouped as 12 Milled and 12 Printed provisional crowns. After all the scans are completed, the alignment and superimposition of the STL files was done.2 The programme calculated the difference in millimetres between the crowns. For continuous data, Mean and Standard Deviation was obtained (SD). For comparison of Milled and Printed Crowns, Independent T Test was applied. Results: When comparison between Milled and Printed crown (Analysis A) at P1, P2 and P3 was performed, it was observed that at P1 the difference in Mean was .03983, at P2 it was .12183and at P3 it was observed to be .02083respectively and this difference in Mean at P1, P2 and P3 was not statistically significant (p>0.05). When comparison between Milled and Printed crown (Analysis B) at P1, P2 and P3 was performed it was observed that the difference in Mean was --.12958, -.06342 and -.08417respectively and this difference in Mean was statistically significant for P3 (p<0.05) whereas there was no statistically significant difference at P1 and P2 (p>0.05) Conclusions: Within the limitations of this in vivo study, there was no difference found between the occlusal precision of the Milled vs Printed provisional crowns. Additive and the subtractive methods show varied accuracies depending on the equipment specifications.