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Dentine permeability and bond quality as affected by new bonding systems
C Prati1, P Ferrieri, C Galloni
1School of Dentistry, University of Bologna, Italy.
Journal of Dentistry
|August 1, 1995
Summary
The study found that XR Bond
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
Background:
- Dentine bonding systems are crucial for dental restorations.
- Understanding the influence of dentine condition on bond strength is essential for clinical success.
Purpose of the Study:
- To investigate the relationship between dentine condition and bond strength for four dentine bonding systems.
- To evaluate dentine permeability, remaining dentine thickness (RDT), and morphology.
- To correlate these factors with shear bond strength.
Main Methods:
- Four dentine bonding systems were tested: All Bond 2, Clearfil Liner Bond, Scotchbond MP, and XR Bond.
- Dentine permeability was measured under physiological pulpal pressure.
- Remaining dentine thickness (RDT) was measured.
- Scanning electron microscopy (SEM) analyzed dentine morphology.
- Shear bond strength tests were conducted after 24h storage under pulpal pressure.
Main Results:
- SEM revealed smear layer removal, dentine demineralization, and collapsed collagen fibrils with conditioner application.
- Primers infiltrated collagen fibrils, forming a hybrid layer in three systems (All Bond 2, Clearfil Liner Bond, Scotchbond MP).
- XR Bond showed significant correlations with RDT and dentine permeability, even with smear layer present.
Conclusions:
- XR Bond's performance was highly sensitive to dentine condition (RDT and permeability).
- The other three systems (All Bond 2, Clearfil Liner Bond, Scotchbond MP) showed no correlation with dentine condition but achieved higher bond values.
- Dentine condition significantly impacts the reliability of certain dentine bonding systems.