Influence of fluoride- or triclosan-based desensitizing agents on adhesion of resin cements to dentin.
Effect of desensitizers on the bond strength of resin cements to dentin was evaluated. Intact premolars (N = 90) were embedded in polymethyl methacrylate; dentin surfaces were exposed, and they were randomly divided into two main groups of cements (Duolink (D), Variolink II (V); n = 45 per group) and then into three desensitizer subgroups (n = 15 per subgroup). Teeth in controls (C) were treated according to cements' adhesion protocols; the other two groups received either fluoride- [Aqua-Prep F (F)] or triclosan-based [Seal&Protect (T)] desensitizers. Ceramic disks (Empress 2) were adhered; specimens were thermocycled (×5,000 cycles, 5-55 ± 1°C, dwell time 30 s) and subjected to shear bond strength test (MPa ± SD) in a universal testing machine (crosshead speed 1 mm/min). Failure types were classified using scanning electron microscope. For V, application of both desensitizers (29.6 ± 7.8 and 22.8 ± 2.8 for F and T, respectively) did not present significantly different results than that of the VC (21.2 ± 2.3; p > 0.05, one-way ANOVA). In D, F (20.6 ± 2.4) showed significantly higher results (p < 0.05) than those in T (16.1 ± 3.9) and DC group (15.2 ± 2.3). V showed significantly higher results than D (p < 0.05, Bonferroni). F and T did not negatively affect the bond strength results with D and V. Adhesive failures were more frequent with both T (84%) and F (66%) in D; cohesive failures in the cement (88%) were more commonly observed with F in V. Both F and T desensitizers can be safely used prior to final cementation but F in combination with V seems to be more reliable, considering both the bond strength and the failure types.
Dündar
Mine
M
Department of Prosthodontics, School of Dentistry, Ege University, 35100-Bornova, Izmir, Turkey. minedundar@yahoo.com
Cal
Ebru
E
Gökçe
Bülent
B
Türkün
Murat
M
Ozcan
Mutlu
M
D000134:Acid Etching, Dental; D000179:Acrylates / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003776:Dental Porcelain / Q000737:chemistry; D003799:Dental Stress Analysis / Q000295:instrumentation; D003804:Dentin / Q000648:ultrastructure*; D057133:Dentin Desensitizing Agents / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D006801:Humans; D018020:Lithium Compounds / Q000737:chemistry; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014260:Triclosan / Q000737:chemistry*
D000179:Acrylates; C438504:Aqua-Prep F; D003738:Dental Cements; D057133:Dentin Desensitizing Agents; C431350:Duo-Link; C118557:Empress 2; D018020:Lithium Compounds; D008689:Methacrylates; C076808:Monobond S; D019279:Resin Cements; C442646:Seal and Protect resin cement; C078484:Syntac dentine adhesive; D003776:Dental Porcelain; C103502:Variolink; D014260:Triclosan; C040415:heliobond; D005459:Fluorides
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