CAD/CAM-Guided Vs. Manual Crown Preparation in Fixed Prosthodontics: A Randomised Controlled Trial

To evaluate the efficacy of a novel CAD/CAM-guided crown preparation technique compared with conventional manual methods in fixed prosthodontics.

A randomised controlled trial (RCT). Place and Duration of the Study: Department of Endodontic Dentistry, Hefei Stomatological Clinic College, Anhui Medical University, Hefei Stomatological Hospital, Hefei, China, from February 2023 to 2024.

Sixty patients requiring single-unit ceramic crowns for mandibular premolars were randomly divided into either the CAD/CAM-guided group (n = 30) or the manual adjustment group (n = 30). The CAD/CAM group utilised intraoral scanning, digital design, and 3D-printed adjustment guided crowns to achieve precise tooth preparations, while the control group relied on the manual undercut adjustments. Operational efficiency, preparation accuracy, prosthetic fit, survival rate, and patient satisfaction were evaluated. Data were statistically analysed using the independent t-test and Chi-square (χ2) test at a significance level of p <0.05.

The CAD/CAM group exhibited significantly shorter preparation times than the control group. No statistically significant differences were found in preparation accuracy, prosthetic fit, clinical success rates, or patient satisfaction between the two groups.

CAD/CAM technology effectively reduces the clinical operating time for tooth preparation. While maintaining clinically acceptable outcomes, it has promising application scenarios.

CAD/CAM-guided crown preparation, Fixed prosthodontics, Preparation adjustment, Traditional manual adjustment.