Radiotherapy impairs adhesive bonding in permanent teeth.
Support Care Cancer
; 28(1): 239-247, 2020 Jan.
Article
de En
| MEDLINE
| ID: mdl-31020438
ABSTRACT
OBJECTIVES:
To evaluate the in vitro effects of radiotherapy (RT) on the morphological surface of the enamel and dentin and to determine the best adhesive system and most appropriate time to restore teeth in head and neck cancer patients.METHODS:
Sixty third molars were cut into 120 enamel fragments and 120 dentin fragments and divided into four groups (n = 30) G1 (control) nonirradiated, only restorative procedure; G2 restorative procedure immediately before RT; G3 restorative procedure immediately after RT; and G4 restorative procedure 6 months after RT. Each group was divided into two subgroups Adper™ Single Bond 2 (SB) and Clearfill SE Bond (CL) based on the material used. After RT and restorative procedures, the specimens were subjected to confocal microscopy and shear bond strength test. Data were analyzed using a two-way ANOVA followed by Tukey's test at a significance level of 5%.RESULTS:
Morphological changes were observed in both substrates after a cumulative dose of 40 Gy, and after 60 Gy, the changes were more evident in both substrates. CL had the highest strength values in both substrates (p < 0.05), and G2 had the lowest strength values for the enamel and dentin (p < 0.05).CONCLUSIONS:
Based on the in vitro study results, we can conclude that RT substantially changes the morphological surface of enamel and dentin and impairs the bond strength. The Clearfill system yielded better results than Adper Single Bond 2, and restoring teeth before RT resulted in the worst results in both substrates.Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Adhésifs
/
Agents de collage dentinaire
/
Émail dentaire
/
Dentine
/
Tumeurs de la tête et du cou
Type d'étude:
Clinical_trials
/
Etiology_studies
Limites:
Humans
Langue:
En
Journal:
Support Care Cancer
Sujet du journal:
NEOPLASIAS
/
SERVICOS DE SAUDE
Année:
2020
Type de document:
Article
Pays d'affiliation:
Brésil