Airborne-particle abrasion with niobium phosphate bioactive glass on caries-affected dentin: effect on the microtensile bond strength. Issue 22 (17th November 2017)

• Record Type: Journal Article
• Authors: Leal, Adriana; Carvalho, Ceci; Maia-Filho, Etevaldo; Monteiro-Neto, Valério; Carmo, Monique; Maciel, Adeilton; Bauer, Jose
• Is Part Of: Journal of adhesion science and technology. Volume 31:Issue 22(2017)
• Page Start: 2410
• Page End: 2423
• Publication Date: 2017-11-17
• Subjects: Minimally invasive dentistry -- bioactive glasses -- dentin reparation -- microtensile bond strength -- dental caries -- dentin -- adhesive systems; Adhesion -- Periodicals; Adhesives -- Periodicals; 668.3
• DOI: 10.1080/01694243.2017.1303865
• Languages: English
• ISSNs: 0169-4243

Abstract

Abstract: This study evaluated the effect of airborne-particle abrasion with niobium phosphate bioglass (NbG) microparticles on the bond strength (μTBS) and longevity of an adhesive system to different dentin substrates. In this study, 18 Caries-free molars were used, of which 12 were microbiologically processed for caries induction. The dentin surfaces were evaluated in three groups: (1) Control – Healthy Dentin; (2) Partial removal of carious tissue; (3) complete removal of carious tissue. Half the teeth in each group were submitted to airborne-particle abrasion with NbG microparticles (15 s/1 cm/5 bar). After this, the adhesive Clearfil S 3 was applied and composite buildups were constructed incrementally; and specimens were longitudinally sectioned to obtain bonded sticks (1.0 mm 2 ) to be tested in tension (0.5 mm/min) immediately or after 6 months of storage in water. The fracture patterns were evaluated by stereomicroscope (40×) and then by scanning electron microscopy. The data were analyzed by the Kruskal-Wallis ( post hoc Dunn) and Mann-Whitney tests ( α = 0.05). Healthy dentin showed the highest bond strength (μTBS). Airborne-particle abrasion with NbG increased the μTBS values in the Group with complete caries removal. The bond strength values in the 24-h period were higher than those at 6 months. In the majority of the specimens the fracture mode was adhesive/mixed. The authors concluded that airborne-particle abrasion on dentin with NbG particles increased the μTBS in the group in which carious dentin was completely removed.