Effect of gamma radiation on bonding to human enamel and dentin

Purposes This study evaluated the effect of gamma radiation on the microtensile bond strength of resin-based composite restoration to human enamel and dentin performed either before or after radiotherapy. Methods Thirty sound human third molars were sectioned mesio-distally into buccal and lingual h...

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Bibliographic Details
Published in:Supportive care in cancer 2012-11, Vol.20 (11), p.2873-2878
Main Authors: Naves, Lucas Z., Novais, Veridiana R., Armstrong, Steven R., Correr-Sobrinho, Lourenço, Soares, Carlos J.
Format: Article
Language:English
Subjects:
Analysis of Variance
Bond strength
Composite Resins - chemistry
Composite Resins - radiation effects
Dental Bonding
Dental Enamel - metabolism
Dentin
Dentin - metabolism
Dentin-Bonding Agents - chemistry
Dentistry
Enamel
Gamma Rays
Head & neck cancer
Humans
In Vitro Techniques
Medicine
Medicine & Public Health
Microscopy, Electron, Scanning
Molar
Nuclear radiation
Nursing
Nursing Research
Oncology
Original Article
Pain Medicine
Radiation Dosage
Radiation therapy
Rehabilitation Medicine
Tensile Strength
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Summary:Purposes This study evaluated the effect of gamma radiation on the microtensile bond strength of resin-based composite restoration to human enamel and dentin performed either before or after radiotherapy. Methods Thirty sound human third molars were sectioned mesio-distally into buccal and lingual halves and then randomly divided into enamel or dentin groups. Enamel and dentin substrates were randomly divided into three sub-groups ( n  = 10): Control, which received no irradiation; specimens were irradiated before restoration protocol; and specimens were irradiated after restoration protocol. Radiation therapy was defined by application of 60-Gy dose fractionally with daily exposures of 2 Gy, 5 days a week, over 6 weeks. Restorations were carried out using Adper Single Bond adhesive system and Filtek Z250 resin composite. The specimens were sectioned producing 4 sticks per specimen and submitted to microtensile on a testing machine. Data were submitted to two-way ANOVA followed by Tukey test ( p  
ISSN:0941-4355
1433-7339
DOI:10.1007/s00520-012-1414-y