Ultrasonic activation of adhesive systems increases bond strength and intratubular penetration of resin cement in root dentin subjected to radiation therapy.

Autor: Ghidini GP; Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil., de Lima Dias-Junior LC; Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil., Minamisako MC; Department of Radiotherapy, Oncology Research Center (CEPON), Florianópolis, SC, Brazil., Takashima MTU; Department of Radiotherapy, Oncology Research Center (CEPON), Florianópolis, SC, Brazil., Cábia NC; Department of Radiotherapy, Oncology Research Center (CEPON), Florianópolis, SC, Brazil., Machado RG; Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil., Bortoluzzi EA; Department of Diagnosis & Oral Health, School of Dentistry, University of Louisville, Louisville, KY, USA., da Silveira Teixeira C; Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil., da Fonseca Roberti Garcia L; Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil. drlucas.garcia@gmail.com.
Jazyk: angličtina
Zdroj: Clinical oral investigations [Clin Oral Investig] 2024 Jun 19; Vol. 28 (7), pp. 386. Date of Electronic Publication: 2024 Jun 19.
DOI: 10.1007/s00784-024-05782-4
Abstrakt: 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 and Methods: 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.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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