Influence of Adhesive Systems on Interfacial Dentin Gap Formation In Vitro
| Autor: | Jan W.V. van Dijken, Maria de Lourdes Rodrigues Accorinte, Giana Bortoli, Rafael Patzlaft, Leonardo Eloy Rodrigues Filho, Alessandra Reis, Alessandro Dourado Loguercio, Silvia Kenshima |
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| Rok vydání: | 2006 |
| Předmět: |
Time Factors
Materials science Surface Properties Carbon Compounds Inorganic Smear layer Dentistry macromolecular substances Materials testing Dental bonding Composite Resins stomatognathic system Materials Testing Dentin medicine Humans Bisphenol A-Glycidyl Methacrylate Composite material General Dentistry business.industry Silicon Compounds fungi Dental Bonding technology industry and agriculture Water Resin Cements medicine.anatomical_structure Dentin-Bonding Agents Smear Layer Microscopy Electron Scanning Methacrylates Water chemistry Adhesive business |
| Zdroj: | Operative Dentistry. 31:431-441 |
| ISSN: | 1559-2863 0361-7734 |
| DOI: | 10.2341/05-53 |
| Popis: | This study measured: 1) the interfacial dentin gap formation (IGW) of 2 etchrinse and 3 self-etch systems with different degrees of acidity and determined the correlation between the smear layer thickness and interfacial gap formation after 1 day and 6 months water storage; 2) the hybrid layer thickness (HLT) produced by the adhesives applied under different smear layer thicknesses.Three self-etch adhesives, a mild (Clearfil SE Bond; SE), a moderate (Optibond Solo Plus Self-Etch Primer; SO) and a strong (Tyrian Self Priming Etchant + One Step Plus; TY), and 2 etchrinse systems (Single Bond; SB and Scotchbond Multi-Purpose Plus; SBMP) were studied. After flat grinding of the occlusal surfaces, 30 molars were sectioned longitudinally in 2 halves. Dentin surfaces with thick and thin smear layers were obtained for each tooth after polishing different sections on 60- and 600-grit SiC paper, respectively. A resin composite (Z250) build-up was made on each tooth section after randomized application of the adhesives. After 24-hour storage in water, resin-dentin bonded sticks (0.8 mm2) were prepared and divided for 1-day and 6-month measurements. The IGW was measured in a stereomicroscope under 400x. SEM micrographs were also made in order to measure the HLT provided by each adhesive.The thickness of the smear layer did not influence the mean gap width (p0.05). The etchrinse systems showed the lowest mean IGW in the 1-day group. Their IGW remained unchanged after 6 months. The self-etch systems showed wider initial IGW, which diminished after 6 months water storage, to sizes similar to the etchrinse systems. The hybrid layer was thicker when bonded to #60 SiC-treated dentin; however, this difference was only statistically different for the 3-step etchrinse system (p=0.001). The thickest hybrid layers were observed for the 2 etchrinse adhesive systems and the thinnest for the mild self-etch. A negative and strong correlation between IGW and HLT was observed for the self-etching adhesive systems tested (r=80.2, p=0.01). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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