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Ghidini GP, de Lima Dias-Junior LC, Minamisako MC, Takashima MTU, Cábia NC, Machado RG, Bortoluzzi EA, da Silveira Teixeira C, da Fonseca Roberti Garcia L. Ultrasonic activation of adhesive systems increases bond strength and intratubular penetration of resin cement in root dentin subjected to radiation therapy. Clin Oral Investig 2024; 28:386. [PMID: 38890207 DOI: 10.1007/s00784-024-05782-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 06/11/2024] [Indexed: 06/20/2024]
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 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.
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Affiliation(s)
- Gabriela Pasqualin Ghidini
- Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil
| | - Luiz Carlos de Lima Dias-Junior
- Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil
| | | | | | - Nayara Cardoso Cábia
- Department of Radiotherapy, Oncology Research Center (CEPON), Florianópolis, SC, Brazil
| | - Renata Gondo Machado
- Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil
| | - Eduardo Antunes Bortoluzzi
- Department of Diagnosis & Oral Health, School of Dentistry, University of Louisville, Louisville, KY, USA
| | - Cleonice da Silveira Teixeira
- Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil
| | - Lucas da Fonseca Roberti Garcia
- Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil.
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Barros APO, de Melo Alencar C, Zambon M, de Andrade MF, Fernández E, Kuga MC. Etch-and-rinse versus self-etch strategy of a universal adhesive in different application methods at the bonding interface of fiber post cementation. J ESTHET RESTOR DENT 2023; 35:1249-1256. [PMID: 37218614 DOI: 10.1111/jerd.13068] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 05/24/2023]
Abstract
OBJECTIVE To evaluate the effect of etch-and-rinse (ER) versus self-etch (SE) strategies of a universal adhesive applied with a manual brush (MB) or rotary brush (RB) on the bonding interface of fiber post cementation. METHODS Forty bovine incisor roots were prepared and divided into four groups according to the methods of application and strategy of universal adhesive use (MB-ER, RB-ER, MB-SE and RB-SE). After 6 months, specimens from different thirds of the post space were evaluated of push-out strength, analysis of adhesive failure patterns, and extent of tags. RESULTS The RB-ER and RB-SE groups showed the highest bond strength values in the cervical and middle thirds of the post space. Cohesive adhesive failure had the highest incidence in the different thirds of the post space in the ER strategy, regardless of the adhesive application method. The RB-ER group showed the highest tag extensions. CONCLUSIONS The protocols of universal adhesive application with RB provided the greater bond strength, but only the ER strategy favored the formation of a greater extension of tags at the adhesive interface. CLINICAL SIGNIFICANCE The application of universal adhesive with RB into the post space increases the strength of the post-cemented fiber bond.
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Affiliation(s)
| | - Cristiane de Melo Alencar
- Department of Restorative Dentistry, School of Dentistry, University Center of the State of Pará, Belém, Brazil
| | - Matheus Zambon
- Department of Operative Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
| | - Marcelo Ferrarezi de Andrade
- Department of Operative Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
| | - Eduardo Fernández
- Instituto de Ciencias Biomédicas, Universidad Autonoma de Chile, Santiago, Chile
| | - Milton Carlos Kuga
- Department of Operative Dentistry, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
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Castro-Núnez GM, Dos Santos JREV, Zaniboni JF, Escalante-Otárola WG, Porto TS, Kuga MC. Effect of mechanical cleaning protocols in the fiber post space on the adhesive interface between universal adhesive and root dentin. Microsc Res Tech 2022; 85:2131-2139. [PMID: 35141981 DOI: 10.1002/jemt.24071] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 01/07/2022] [Accepted: 01/21/2022] [Indexed: 11/10/2022]
Abstract
The aim of this study was to evaluate the effects of cleaning protocols on the presence of residues, open dentinal tubules, and bond strength of a self-etch adhesive plus a dual-cure resin cement to dentin in the fiber-post space. The methods for cleaning utilized were conventional irrigation (CI), rotary brush with continuous rotary movement (RB), and continuous ultrasonic irrigation (CUI). Sixty bovine incisors were used for fiber-post space preparation. Thirty roots were divided into three groups (n = 10) according to the cleaning protocols and submitted to scanning electron microscope to evaluate presence of residues and relative quantity of open dentinal tubules on dentin surface. Similar protocols were performed in the other thirty roots (n = 10) using a self-etching adhesive system (Scotchbond Universal) and a dual-cure resin cement (Relyx Unicem 2). After 6 months cervical, middle, and apical thirds sections of fiber-post space were submitted to push-out testing. To data ANOVA and Tukey's test were employed (α = 5%). RB and CUI showed the lowest presence of residues on dentin surface (p = .015) and the highest bond strength values (p < .001), regardless of the dentin third. CUI presented the highest quantity of open dentinal tubules in middle and apical thirds (p < .001). CI presented the lowest bond strength value of resin cement, regardless of dentin third (p < .001). Mechanical cleaning protocols, such as RB and CUI, presented better surface cleaning capabilities and higher bond strength than CI with dual-cure resin cement employed. The use of a mechanical cleaning protocol seems to cause appropriate condition on the root dentin surface. Mechanical cleaning of root dentin provided greater bond strength of the self-etching system with dual resin cement. Conventional irrigation did not provide adequate root dentin cleaning.
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Affiliation(s)
| | | | - Joissi Ferrari Zaniboni
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
| | | | - Thiago Soares Porto
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
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