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In situ atomic force microscopy and image analysis of dentine submitted to acid etching
S Paciornik1, G De-Deus, C M Reis
1Department of Materials Science and Metallurgy, Catholic University of Rio de Janeiro, Rio de Janeiro, Brazil. sidnei@dcmm.puc-rio.br
Journal of Microscopy
|March 21, 2007
Summary
Acid etching cleans root dentine surfaces and opens dentine tubules. Tubule diameter increases over time, reaching a plateau around 3.5-5.5 micrometers after 300 seconds.
Area of Science:
- Biomaterials science
- Dental materials science
- Surface science
Background:
- Acid etching is crucial for dental adhesion.
- Understanding dentine surface changes is vital for effective treatments.
- Real-time analysis of etching processes remains challenging.
Purpose of the Study:
- To investigate the real-time effects of acid etching on root dentine.
- To quantitatively analyze the morphological changes of dentine tubules during etching.
- To determine the time-dependent evolution of dentine surface topography.
Main Methods:
- Utilized Atomic Force Microscopy (AFM) with a liquid cell for in-situ analysis.
- Acquired time-series images of root dentine in contact with etching solution.
- Employed image analysis techniques to measure dentine tubule diameter and morphology.
Main Results:
- Observed clear trends of root dentine surface cleaning and tubule opening.
- Quantified an increase in dentine tubule diameter over etching time.
- Dentine tubule diameter reached a saturation point between 3.5 and 5.5 micrometers after approximately 300 seconds.
Conclusions:
- Atomic Force Microscopy in a liquid cell enables real-time monitoring of acid etching on dentine.
- Acid etching progressively enlarges dentine tubules, impacting surface characteristics.
- The findings provide quantitative data on the kinetics of dentine tubule alteration during etching.
