1Professor, Fixed Prosthodontics, Department Faculty of Oral and Dental Medicine, Cairo University, Egypt
2Assistant Professor, Fixed Prosthodontics, Department of Oral and Dental Medicine, Cairo University, Egypt
3B.D.S, Fixed Prosthodontics, Department Ministry of Interior, Affairs Hospital, Egypt
*Corresponding author
Online published on 21 May, 2018.
Extra coronal restoration for endodontically treated teeth is preferable. Endocrowns have become a promising alternative in the functional recovery of endodontically treated molar teeth. Lava Ultimate Resin Nano Ceramic (RNC) blocks express the unique biomechanical complex (monoblock). Reducing the marginal discrepancies and microleakage of a restoration is attained by preventing the luting material from dissolution and exposure to oral environment. Natural teeth were assigned into 2 groups according to the material of endocrowns. Group 1: (4 each): LAVA Ultimate. Group 2: (4 each) E. Max CAD. The crown portion of all molars were removed perpendicular to the long axis and subjected to standard endodontic treatment. Scanning, designing and milling of endocrown restorations corresponding to each tooth preparation. Endocrowns were cemented and thermocycled. Each specimen was photographed using USB Digital microscope with a built-in camera. A digital image analysis system was used to measure and qualitatively evaluate the gap width. Dye penetration depth was measured with using USB Digital microscope with the built-in camera. It was found that E.max group recorded higher vertical marginal gap mean value (76.99 ± 5.04 μm) than Lava Ultimate group (69.51 ± 7.1 μm) and was statistically non-significant (P>0.05) as indicated by student t-test. The vertical marginal discrepancy of the E.max CAD and Lava Ultimate endocrowns fall within the clinically acceptable range <120 μm.
E.max CAD, endocrowns, Lava Ultimate, Marginal discrepancy, Microleakage, CAD/CAM
