The influence of dentin depths on the shear bond strenghth of different adhesives under simulated pulpal pressure / 实用口腔医学杂志
Journal of Practical Stomatology
;
(6): 57-60, 2018.
Article
in Chinese
| WPRIM
| ID: wpr-697454
ABSTRACT
Objective:
To determine the shear bond strength of different adhesive systems to superficial and deep dentin under simulated pulpal pressure.Methods:
Occlusal surfaces of 72 sound extracted noncarious human molars were ground to obtain flat dentin surfaces(36 superficial and 36 deep dentin). Each dentin groups was randomly asssigned into 3 groups(n = 12) Clearfil SE Bond(SE), Clearfil S3 Bond(S3) and Prime&Bond NT(PB). All of samples were tested under simulated pulpal pressure. After bonding procedures with 3 adhesives respectively,all samples were covered with nail vanishi. The shear bond strength was tested after the samples stored for 24 h under simulated pulpal pressure.Results:
The bond strength of PB to superficial and deep was (17. 11 ± 2. 71) and(11. 13 ± 3. 60) MPa(P < 0. 05),that of SE (16. 53 ± 5. 29) and (14. 78 ± 4. 53) MPa(P> 0. 05),S3 (9. 08 ± 1. 74) and (8. 43 ± 1. 41) MPa(P> 0. 05).Conclusion:
Bond strengths of phosphoric acid etching system decreases with an increase of dentin depth, that of two-step self-etch adhesive system is not affected by the depth.
Full text:
Available
Index:
WPRIM (Western Pacific)
Language:
Chinese
Journal:
Journal of Practical Stomatology
Year:
2018
Type:
Article
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