Document Type
Original Study
Abstract
Purpose: The current study aimed to evaluate the effect of fabrication techniques (CAD-CAM, 3D Printing and conventional techniques) on the marginal accuracy of interim crowns. Materials and methods: Thirty interim crowns were constructed and distributed into three groups according to the technique of construction (n=10): Auto polymerizing resin conventional group, PMMA (poly methyl metha acrylate) prefabricated blocks CAD-CAM group and Light-cure biocompatible resin 3D printing group. The marginal accuracy of the constructed temporary crowns was tested by digital microscope to detect micro gap at selected points. Result: Before cementation, the highest mean value was recorded in conventional group (13.17±0.33) (µm), followed by the 3D printing group (12.83±0.78) (µm), while the statistically lowest mean value (11.98±1.66) (µm) was recorded in CAD-CAM group. After cementation, the statistically highest mean value was recorded in the conventional group (35.65±0.62) (µm), followed by the 3D printing group (20.10±3.66) (µm) , followed by the CAD-CAM (17.53±2.47) (µm). Conclusions: Fabrication technique of provisional crowns affect their marginal accuracy. Superior margin accuracy was obtained with CAD CAM constructed provisional crowns.
Keywords
Provisional crowns, Marginal accuracy, CAD CAM.
How to Cite This Article
Shabana, Fatma A.; Ahmed, Atef F .; and Mekkawi, Walaa O. El
(2024)
"The Outcome of 3D printing and CAD-CAM Techniques on Marginal Accuracy of Provisional Crowns,"
Al-Azhar Journal of Dentistry: Vol. 11:
Iss.
4, Article 1.
DOI: https://doi.org/10.58675/2974-4164.1640
Subject Area
Restorative Dentistry Issue (Removable Prosthodontics, Fixed Prosthodontics, Endodontics, Dental Biomaterials, Operative Dentistry)
