Effects of water-storage on the physical and ultramorphological features of adhesives and primer/adhesive mixtures

• Published in: Dental Materials Journal Vol. 29; no. 6; pp. 697 - 705
• Main Authors: REIS, Andre F., CARRILHO, Marcela R.O., GHANAME, Eduardo, PEREIRA, Patricia N.R., GIANNINI, Marcelo, NIKAIDO, Toru, TAGAMI, Junji
• Format: Journal Article
• Language: English
• Published: Japan The Japanese Society for Dental Materials and Devices 2010; Japanese Society for Dental Materials and Devices
• Subjects: Adhesiveness; Adhesives; Bisphenol A-Glycidyl Methacrylate - chemistry; Chemical Phenomena; Dental Stress Analysis - instrumentation; Dentin-Bonding Agents - chemistry; Dentistry; Diffusion; Elastic Modulus; Humans; Materials Testing; Methacrylates - chemistry; Microscopy, Electron, Transmission; Mineral Oil - chemistry; Polymethacrylic Acids - chemistry; Resin Cements - chemistry; Silver Staining; Stress, Mechanical; Tensile Strength; Time Factors; Transmission electron microscopy; Ultimate tensile strength; Water - chemistry
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2009-091

The aims of this study were to evaluate the ultimate tensile strength (UTS) and elastic modulus (E) of adhesives, and primer/adhesive mixtures after aging for 6 months in water or oil; and to compare silver uptake patterns under the TEM. A one-step self-etching adhesive (One-up Bond F: OB), two two-step self-etching primers (SE Bond: SE and Protect Bond: CP), and two etch-and-rinse systems (Single Bond: SB and Prime&Bond NT: PB) were used. Bonding and primer solutions of self-etching systems were also mixed (SE+P and CP+P). Most adhesives presented decreased UTS after water-storage. Similar or increased UTS was observed after oil storage. Except for SB, E values did not change after water-storage, but they increased after storage in oil. OB, CP+P and SE+P presented more silver uptake. The effects of water-storage were material-dependent, and significantly affected the mechanical properties and silver uptake patterns of adhesives.