Related Experiment Videos
Scanning electron microscopy and dentinal permeability analysis of smear layer
C Prati1, R Mongiorgi, D H Pashley
1School of Dentistry, Department of Operative Dentistry, University of Bologna, Italy.
Summary
Different acid treatments, including polyacrylic acid and maleic acid, effectively removed the smear layer on dentine. This removal significantly increased dentine permeability, impacting hydraulic conductance.
Area of Science:
- Biomaterials Science
- Dental Research
- Surface Chemistry
Background:
- Dentine's surface morphology and permeability are crucial for dental procedures.
- The smear layer can impede the effectiveness of treatments.
- Understanding the impact of various acids on dentine is essential for restorative dentistry.
Purpose of the Study:
- To evaluate the effects of polyacrylic acid, maleic acid, and phosphoric acid on dentine surface morphology.
- To assess the changes in dentine permeability (hydraulic conductance) following these acid treatments.
- To compare the efficacy of different acids in removing the smear layer.
Main Methods:
- Dentine samples were treated with polyacrylic acid, maleic acid, phosphoric acid, and saline (control).
- Surface morphology was analyzed using appropriate microscopy techniques.
- Dentine permeability was quantified by measuring hydraulic conductance.
Main Results:
- All tested acid treatments successfully removed the smear layer from the dentine surface.
- A significant increase in dentine permeability was observed after each acid treatment.
- The degree of permeability increase varied among the different acid treatments.
Conclusions:
- Polyacrylic acid, maleic acid, and phosphoric acid are effective in removing the smear layer.
- Acidic conditioning of dentine demonstrably increases its hydraulic conductance.
- These findings have implications for adhesion and fluid transport in dentine bonding.