Glass-ceramics bonding in geriatric patients: comparison with young teeth.

Autor:	Türk, Ayşe Gözde, Cal, Ebru, Unal, Sena, Güneri, Pelin, Ulusoy, Mübin, Ozden, Meltem, Türk, Ayşe Gözde, Güneri, Pelin, Ulusoy, Mübin
Předmět:	DENTAL bonding GERIATRIC dentistry GLASS-ceramics DENTAL adhesives DENTAL cements OLDER patients THERAPEUTIC use of biomedical materials AGE distribution BIOMECHANICS COMPARATIVE studies DENTAL veneers DENTISTRY RESEARCH methodology MEDICAL cooperation MOLARS RESEARCH EVALUATION research RANDOMIZED controlled trials SURFACE properties THERAPEUTICS
Zdroj:	Gerodontology; Mar2017, Vol. 34 Issue 1, p49-56, 8p
Abstrakt:	Objective: The aim of the study was to assess whether in geriatric patients, the shear bond strength (SBS) of glass-ceramics differed when compared to young controls.Background: In the need of aesthetic restorations for geriatric patients, reliable bonding of glass-ceramics should be accomplished; however, glass-ceramics bonding on aged tooth structures is still unclear.Materials and Methods: Sixty extracted molars from young and geriatric patients [18-25 (Y), and 65-80 (O)] were cut buccolingually to prepare enamel (E) and dentin (D) surfaces. Both surfaces were randomly divided into three groups according to the resin cements: Variolink II (V); Superbond (S); and Clearfil Esthetic Cement (C) (n = 10). Disc-shaped glass-ceramics (IPS E-max Press) (n = 120) were prepared. Specimens were bonded and subjected to thermocycling. SBS test was performed using a universal testing machine (0.5 mm/min). After debonding, the surfaces were examined using stereomicroscope and scanning electron microscope. Data were statistically analysed with Kolmogorov-Smirnov, Levene, anova and Bonferroni tests (p = 0.05).Results: There were no significant differences between the old and young teeth surfaces. V showed the highest SBS [MPa(SD)] on both enamel and dentin [36.7 (6.5) (YE), 23.2 (13.2) (YD), 32.1 (16.2) (OE), 25.5 (8.6) (OD), respectively]. Significant differences were observed between resin cements (p < 0.05). The failure types were 43% adhesive between tooth and cement, 48% mix, 9% adhesive between cement and ceramic, regardless of cement type.Conclusion: In geriatric patients, the shear bond strength of glass-ceramics did not differ when compared to that of young controls. On the dentin surface, etch-rinse resin cements appear to be more appropriate for glass-ceramics bonding. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
Externí odkaz:	Zobrazit plný text záznamu Plný text