Introduction:
The implementation into a clinical practice of computer-aided design and milling technology for prosthetic restorations (CAD/CAM), as well as the use of high-strength materials such as zirconium oxide has many beneficial properties, which allowed the use of zirconium oxide ceramics in the production of implantological abutments.

Aim of the study:
The aim of the study was a laboratory assessment of surface topography of zirconium ceramics used in implant abutments manufacturing.

Material and methods:
Samples of zirconia ceramics Wieland (Wieland, Germany) and Robocam (Robocam, Poland) were analyzed. Samples for testing the surface topography of zirconia ceramics, in the shape of cylinders with a diameter of 10 mm and a height of 10 mm were made, cuted from blocks prepared by manufacturers. A total of 20 samples were prepared: 10 pieces of Wieland ceramic samples and 10 pieces of Robocam ceramic samples. In this reserch Atomic Force Microscopy has been used.

Results:
Observations of the surface quality of the tested samples indicated pressing errors in Wieland ceramics (intergregate and intergranular pores). The comparison of the results of the surface roughness coefficient RMS and the surface roughness Ra of both samples indicate a large irregularity in the surface morphology.

Conclusions:
The value of the RMS and Ra ratio and the homogeneity of the ceramic material may affect the subsequent degree of adhesion of cements connecting implant abutment with a prosthetic crown.