Objetive: Evaluate And Comparing The Surface Roughness Of Two Acrylic Resins Using To Elaborate Provisonals. Methods: They Were Selected Auto Polimerizable And Thermal Polimerizable Acrylic Resins Veracril (New Stetic S.A, Medellin, Colombia) Made 20 Proofs With Sizes 64 Mm Lenght 10,0 +/- 0,2 Mm Width And 3.3 +/-0,2 Mm Of Thickness Using These Sizes In Molds Of Stainless Steel, The Materials Were Manipulated, Finished And Polished To Manufacter`s Recommendations. The Ruggedness Evaluation Was Made With Profilometer. Results: The Results Showed That The Thermal Polimerizable Presents Less Surface Ruggedness With Values Of 0,07 µm. Conclusions: The Thermal Polimerizable Presents A Better Behaviour Being Less Rugose.