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Effects of additional and extended acid etching on bonding to caries‐affected dentine
Author(s) -
Arrais César Augusto Galvão,
Giannini Marcelo,
Nakajima Masatoshi,
Tagami Junji
Publication year - 2004
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.2004.00159.x
Subject(s) - adhesive , molar , materials science , etching (microfabrication) , bond strength , phosphoric acid , composite material , dentistry , scanning electron microscope , acid etching , dental bonding , layer (electronics) , metallurgy , medicine
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.