Universal Adhesive Application Modes Differentially Affect the Fracture Resistance of Resin Composite Restored Teeth
Issued Date
2024-03-01
Resource Type
eISSN
15592863
DOI
Scopus ID
2-s2.0-85186750521
Pubmed ID
38196084
Journal Title
Operative dentistry
Volume
49
Issue
2
Start Page
200
End Page
209
Rights Holder(s)
SCOPUS
Bibliographic Citation
Operative dentistry Vol.49 No.2 (2024) , 200-209
Suggested Citation
Saitamon P., Pravalpruekskul S., Vongphan N., Harnirattisai C., Sattabanasuk V. Universal Adhesive Application Modes Differentially Affect the Fracture Resistance of Resin Composite Restored Teeth. Operative dentistry Vol.49 No.2 (2024) , 200-209. 209. doi:10.2341/23-092-L Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/97592
Title
Universal Adhesive Application Modes Differentially Affect the Fracture Resistance of Resin Composite Restored Teeth
Author's Affiliation
Corresponding Author(s)
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Abstract
This study evaluated the fracture resistance of teeth with mesio-occluso-distal (MOD) resin composite restorations using universal adhesive (Single Bond Universal; SBU) in three different manipulation modes compared with those using two-step self-etch (Clearfil SE bond; CSE) and 3-step etch-and-rinse (Scotchbond Multi-Purpose; SBMP) adhesives at 24 hours and after thermocycling. One hundred and sixty maxillary premolars were assigned into eight groups of 20 each. Intact teeth and nonrestored cavity-prepared teeth served as controls. For the remaining specimens, cavities were restored with resin composite using different adhesives-SBU in self-etch, etch-and-rinse, or selective enamel etching modes; CSE in self-etch or selective enamel etching; and SBMP. Specimens from each group were either stored in 37°C water for 24 hours or further submitted to thermocycling for 30,000 cycles (n=10), then subjected to axial compression stress until fracture. Fracture patterns were observed microscopically. Data were statistically analyzed at a 95% confidence level. Among the restored teeth, mean failure load of the group using SBMP was the highest at both short-term and long-term evaluation periods (p<0.05). Fracture strengths of the SBU groups where enamel was etched with phosphoric acid prior to the adhesive application were similar and were greater than in those specimens without pre-etching (p<0.05). After thermal aging, a significant decrease in fracture resistance value was detected only for the group using SBU in etch-and-rinse application mode (p<0.05). For the self-etch strategy, SBU demonstrated lower load to fracture than CSE following thermocycling; all specimens failed at and beneath the crestal level (p<0.05). Application of SBU universal adhesive in selective enamel etching mode provided higher and more stable fracture resistance of teeth with MOD resin composite restorations than in self-etch mode.