Impact of radiotherapy on the bond strength of different adhesive systems to human dentin: one-year in vitro evaluation
Braz. j. oral sci
;
18: e191638, jan.-dez. 2019. ilus
Article
Dans Anglais
| LILACS, BBO
| ID: biblio-1095366
ABSTRACT
Aim:
The aim of this study is to evaluate the effect of radiotherapy on the bond strength of resin-based composite restorations to dentin, performed either 24 h or 1 year before or after radiation.Methods:
Ninety-six posterior teeth were randomly distributed into the following groups IB (n = 16), irradiated teeth were restored 1 year after x-ray application; NB (n = 16), not irradiated teeth were stored for 1 year and then restored. IA (n = 32), teeth were restored and irradiated at 24 h or 1 year after the restoration. NA (n = 32), teeth were restored, not irradiated, and tested as IA. Eight samples from each group were randomly assigned to either the three-step or two-step etch-and rinse adhesive system procedure. The irradiated specimens were subjected to 60 Gy of x-ray radiation fractionally. The restored teeth were vertically sectioned, and 1-mm2 resindentin sticks were obtained and submitted to the microtensile bond strength test. The bond strength data were analyzed by two-way analysis of variance (ANOVA) followed by Tukey's test (p < 0.05). Failure modes were examined by optical microscopy and scanning electron microscopy.Results:
The IB group showed lower bond strength values compared to the NB group. The bond strength values between the adhesive systems were not statistically different.Conclusion:
The application of radiation dose decreased the bond strength of the adhesive restorations to dentin when the bonding procedure was conducted 1 year after in vitro radiotherapy
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Radiothérapie
/
Résistance à la traction
/
Dentine
/
Tumeurs de la tête et du cou
langue:
Anglais
Texte intégral:
Braz. j. oral sci
Thème du journal:
Dentisterie
Année:
2019
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Faculty of Nova Esperança/BR
/
Federal University of ParaiÌba/BR
/
Federal University of Pernambuco/BR
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