Searching for just a few words should be enough to get started. If you need to make more complex queries, use the tips below to guide you.
Article type: Research Article
Authors: Roy, Anip K.a | Prasad, Govind N.b | Bhagat, Tushar V.c | Chaturvedi, Saurabhd; * | Gurumurthy, Vishwanathe | Vyas, Rajeshe | Vaddamanu, Sunil K.e | Das, Gotamd
Affiliations: [a] Department of Prosthodontics, Institute of Dental Sciences, Bareilly, Uttar Pradesh, India | [b] Dr Govind’s Rama Dental Care, Guntakal, Andhra Pradesh, India | [c] College of Dentistry, Prince Sattam Bin Abdulaziz University, AlKharj, Saudi Arabia | [d] Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Saudi Arabia | [e] Department of Dental Technology, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
Correspondence: [*] Corresponding author: Saurabh Chaturvedi, Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Saudi Arabia. Tel.: +966 580697248, E-mail: survedi@kku.edu.sa.
Abstract: BACKGROUND: The increased strength of zirconia has resulted in its widespread application in clinical dentistry. Nevertheless, the fracture of veneering porcelains remains one of the key reasons of failure. OBJECTIVE: The objective of this study was to compare and analyze the influence of surface conditioning methods on the core-veneer bond strength of zirconia restorations. METHODS: Thirty specimens of zirconia core with sizes 10 × 5 × 5 mm were layered with porcelain of sizes 5 × 3 × 3 mm. On the basis of different surface conditioning methods, four groups were made: Group I: abrasion with airborne alumina particles of 110 μm size, Group II: sandblasting with silica coated alumina particles of 50 μm in size, Group III (modified group): alteration with a coating of zirconia powder prior to sintering, and Group IV (control group): metal core specimens. The shear force of all specimens was tested using a universal testing machine with a 0.5 mm/min crosshead speed. One-way analysis of variance (ANOVA) and Tukey’s post hoc pair wise comparison (p= 0.05) were performed to analyze the shear bond strength. A scanning electron microscope was used to assess the fractured specimens. RESULTS: A statistically significant difference was noted between the groups. The mean value of shear bond strength was 40.25 MPa for Group I, 41.93 MPa for Group II, 48.08 MPa for Group III and 47.01 MPa for Group IV. CONCLUSIONS: The modified zirconia group and control group demonstrated a significantly higher mean bond strength than that of Group I, where airborne particle abrasion was used. The scanning electron microscope showed that cohesive fracture in the porcelain veneers was the main problem of failure in altered zirconia. The modified zirconia specimens in Group III demonstrated significantly improved values of shear bond strength.
Keywords: CAD/CAM zirconia, shear bond strength, veneering porcelain, surface treatment
DOI: 10.3233/THC-202539
Journal: Technology and Health Care, vol. 29, no. 3, pp. 467-477, 2021
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
USA
Tel: +1 703 830 6300
Fax: +1 703 830 2300
sales@iospress.com
For editorial issues, like the status of your submitted paper or proposals, write to editorial@iospress.nl
IOS Press
Nieuwe Hemweg 6B
1013 BG Amsterdam
The Netherlands
Tel: +31 20 688 3355
Fax: +31 20 687 0091
info@iospress.nl
For editorial issues, permissions, book requests, submissions and proceedings, contact the Amsterdam office info@iospress.nl
Inspirees International (China Office)
Ciyunsi Beili 207(CapitaLand), Bld 1, 7-901
100025, Beijing
China
Free service line: 400 661 8717
Fax: +86 10 8446 7947
china@iospress.cn
For editorial issues, like the status of your submitted paper or proposals, write to editorial@iospress.nl
如果您在出版方面需要帮助或有任何建, 件至: editorial@iospress.nl