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Comparison of the bond strength of composite resin to Er:YAG laser irradiated human enamel pre‐treated with various methods In Vitro
Author(s) -
Otsuki Masahito,
Eguro Toru,
Maeda Toru,
Tanaka Hisayoshi
Publication year - 2002
Publication title -
lasers in surgery and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 112
eISSN - 1096-9101
pISSN - 0196-8092
DOI - 10.1002/lsm.10049
Subject(s) - phosphoric acid , er:yag laser , bond strength , enamel paint , materials science , irradiation , ultimate tensile strength , etching (microfabrication) , composite number , composite material , polishing , laser , adhesive , optics , metallurgy , physics , layer (electronics) , nuclear physics
Background and Objective We have reported that the application of ultrasonic scalers on the Er:YAG laser‐irradiated enamel surface achieved bond strengths of approximately 16 MPa. However, it is reported that a bond strength of 20 MPa is needed to prevent the maginal gaps, so the tensile bond strength (TBS) of composite resin to the Er:YAG laser‐irradiated enamel is still insufficient. Study Design/Materials and Methods Various methods (phosphoric acid etching, air scaling, ultrasonic scaling, air powder polishing, combination with phosphoric acid etching, and prior mechanical removal methods) were tested as a technique to increase TBS of composite resins to the Er:YAG irradiated enamel. Results Both the methods of mechanical removal following Er:YAG laser irradiation and the phosphoric acid etching following irradiation and mechanical removal had significant effects on TBS. TBS in the group with acid etching following air powder polishing showed highest value, 22.0 MPa. Conclusion The application of phosphoric acid etching following mechanical removal of Er:YAG laser irradiation was effective to achieve high bond strength. Lasers Surg. Med. 30:351–359, 2002. © 2002 Wiley‐Liss, Inc.