Evaluation Of CAD/CAM Milled Zirconia Crowns And 3D Printed Permanent Resin Crowns in the term of Adaptation
DOI:
https://doi.org/10.15218/edj.2026.9Keywords:
Internal fit, adaptation, CAD/CAM milled zirconia crown, 3D printed permanent resin crownAbstract
Background and Objective: This study aimed to evaluate and compare the adaptability in term of internal fitting for both types of computer aided design and computer aided milling (CAD/CAM) milled zirconia crown and 3D printed permanent resin crown in both periods of before and after thermocycling aging to evaluate the clinical performance of both types of crowns.
Method: Forty crowns were manufactured: twenty from CAD/CAM zirconia milling group and twenty from 3D-printed permanent resin group. The internal fit test is done for the crowns both before and after thermocycle aging using silicone replica technique. Measurements were taken at marginal, axial, axio-occlusal, and centro-occlusal points under stereomicroscope of 20x magnification. Data analyzed on SPSS software using multiple comparison test.
Result: There were no differences that is statistically significant in most of the points measured for both types of CAD/CAM milled zirconia and 3D-printed permanent resin crown. Thermocycling aging did not result in statistically significant differences for the internal fit of both types of crowns.
Conclusion: Clinically acceptable internal fit values were shown by both 3D-printed permanent resin crowns and CAD/CAM milled zirconia crowns. In some cases of greater adaptation, 3D-printed crowns performed similarly to milled crowns. Thermocycling had no significant impact on internal fit, indicating the materials' and fabrication techniques' long-term clinical practicality.
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