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BIBTEX RIS

Effects of additional and extended acid etching on bonding to caries‐affected dentine

2004; Wiley; Volume: 112; Issue: 5 Linguagem: Inglês

10.1111/j.1600-0722.2004.00159.x

1600-0722

César Augusto Galvão Arrais, Marcelo Giannini, Masatoshi Nakajima, Junji Tagami,

Dental Research and COVID-19

This study evaluated the effects of additional and extended acid etching on microtensile bond strength (µTBS) of two adhesive systems to sound (SD) and caries‐affected dentine (CAD). Flat surfaces of CAD surrounded by SD of 36 extracted carious third molars were assigned to four treatments (i): self‐etching adhesive system (Clearfil SE Bond) applied to dentine surfaces following manufacturer's instructions (MI); (ii) after additional etching for 15 s (35% phosphoric acid, PA); (iii) total‐etch one‐bottle adhesive (Single Bond) applied to dentine surfaces following MI; or (iv), after etching for 45 s with PA. Composite ‘blocks’ were built on bonded surfaces and restored teeth were vertically sectioned to obtain bonded slices of 0.7 mm thick. Slices were trimmed to create hourglass‐shaped specimens (cross‐sectional area of 1 mm 2 ), which were tested under tension in a universal testing machine. Additional CAD and SD samples were prepared for scanning electron microscopy observations. Additional and extended etching significantly increased µTBS to CAD; however, µTBS of both adhesives to CAD were significantly lower than to SD. Additional and extended etching can improve bonding to CAD; however, adhesives applied on SD showed the best results for bonding.