Ultrasonic activation of adhesive systems increases bond strength and intratubular penetration of resin cement in root dentin subjected to radiation therapy.
Clin Oral Investig
; 28(7): 386, 2024 Jun 19.
Article
em En
| MEDLINE
| ID: mdl-38890207
ABSTRACT
OBJECTIVE:
This study aimed to evaluate the effect of ultrasonic activation of etch-and-rinse and self-etch adhesive systems on the bond strength of resin cement to irradiated root dentin. MATERIALS ANDMETHODS:
Eighty human maxillary anterior teeth were distributed into 8 groups (n = 10), according to the type of adhesive system used (etch-and-rinse and self-etch), the ultrasonic activation of the adhesive systems, and the dentin condition (irradiated or non-irradiated - 70 Gy). Endodontic treatment was performed followed by fiberglass post-space preparation. After fiberglass posts' luting, the roots were transversely sectioned on dentin discs and submitted to the push-out bond strength test (0.5 mm/min). The fractured specimens were analyzed under a stereomicroscope and Scanning Electron Microscope (SEM) for failure mode classification. One of the dentin discs was analyzed under SEM to evaluate the characteristics of the adhesive interface.RESULTS:
Irradiated specimens had lower bond strength than non-irradiated specimens (P < 0.0001). Ultrasonic activation of both adhesive systems increased the bond strength of the resin cement to irradiated dentin (P < 0.0001). Radiotherapy significantly affected the failure mode in the middle (P = 0.024) and apical thirds (P = 0.032) (adhesive failure).CONCLUSION:
Non-irradiated specimens had a more homogeneous adhesive interface. When ultrasonically activated, both adhesive systems showed a greater number of resinous tags, regardless of the dentin condition. CLINICAL RELEVANCE Ultrasonic activation of adhesive systems is a feasible strategy to enhance fiberglass posts retention in oncological patients.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Teste de Materiais
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Microscopia Eletrônica de Varredura
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Técnica para Retentor Intrarradicular
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Colagem Dentária
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Cimentos de Resina
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Dentina
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article