Introduction: Milled and 3D printed PMMA restorations are widely used in fabrication of all on-four prosthesis, as the traditional process needs many complicated steps. These steps may leads to inaccurate prostheses with poor fit.
The aim of this study was to evaluate the accuracy of fit of CAD/CAM milled and 3D printed PMMA resin all on-four prosthesis.
Material and methods: Eight patients rehabilited with all on-four implants supported prosthesis. Computer-guided surgical procedures were followed for insertion of the implants. Each patient received an immediate temporary resin all on-four prostheses. CAD (Computer Aided Designed) was used to design the prosthesis. Manufacturing CAM (Computer Aided Manufacture) of the prosthesis was carried out with two technologies. 3D printing and milling technologies were used to fabricate the resin prosthesis for each patient. The accuracy of fit of the two manufactured resin prosthesis was evaluated virtually using geomagic software.
Results: The results shows a statistically significant difference of the milled group when compared with the 3D printed group. (p = < 0.000)
Conclusion: Milled showed better fit than 3D printed restoration in resin temporary prosthesis for all on-four implant supported prosthesis.