Biadsee, Ameer; Özcan, Mutlu; Masarwa, Lubaba; Haddad, Mishel; Al-Haj Husain, Nadin; Ormianer, Zeev (2022). Effect of Titanium-Base Abutment Height on Optical Properties of Monolithic Anterior Zirconia Crowns. Materials, 15(21) Molecular Diversity Preservation International MDPI 10.3390/ma15217643
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The effects of different heights of ti-base abutments on the color of anterior screw-retained zirconia restorations fabricated using computer-aided design and computer-aided manufacturing (CAD-CAM) technologies may affect the optical clinical outcome. The purpose of this study was to measure and compare the color parameters of zirconia crowns in different shades on ti-base abutments. Identical specimens (N = 160) were milled to restore the screw-retained central maxillary incisor crown, using 5% mol yttria zirconia (5Y-TZP). The specimens were designed using computer design software to match 3.5 mm and 5.5-mm ti-base abutments and milled using one CAD-CAM technology. Specimens were divided into four main groups depending on zirconia shade (A1/0, A2/3, A3.5/4 and B2/3) and then assigned to two subgroups according to ti-base height. Color measurements in the CIELab coordinates were made using a spectrophotometer under room-light conditions. Color difference (ΔE*) values were calculated using the CIE76 and CIEDE2000 formula. Within the group of A0/1 and A2/3, for 5.5 mm abutment height, a significant difference was found between the means of colors ∆E00 and ∆Eab (p < 0.01). Using a 5.5 mm-height ti-base abutment may produce a clinically unacceptable outcome (ΔEab > 2) in A1/0 and A2/3 color groups.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology |
UniBE Contributor: |
Al-Haj Husain, Nadin |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
1996-1944 |
Publisher: |
Molecular Diversity Preservation International MDPI |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
16 Nov 2022 14:48 |
Last Modified: |
05 Dec 2022 16:28 |
Publisher DOI: |
10.3390/ma15217643 |
PubMed ID: |
36363236 |
Uncontrolled Keywords: |
colour dental dental materials monolithic zirconia optical properties prosthetic dentistry titanium-base abutment |
BORIS DOI: |
10.48350/174753 |
URI: |
https://boris.unibe.ch/id/eprint/174753 |
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