Open AccessEvaluation of surface structural and mechanical changes following remineralization of dentin
Author(s) -
Bertassoni Luiz Eduardo,
Habelitz Stefan,
Pugach Megan,
Soares Paulo Cesar,
Marshall Sally Jean,
Marshall Grayson William
Publication year - 2010
Publication title -
scanning
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.359
H-Index - 47
eISSN - 1932-8745
pISSN - 0161-0457
DOI - 10.1002/sca.20199
Subject(s) - nanoindentation , dentin , remineralisation , apatite , materials science , tooth remineralization , matrix (chemical analysis) , composite material , dentistry , chemical engineering , chemistry , mineralogy , enamel paint , engineering , medicine
This study sought to gain insights into the surface structural and mechanical changes leading to remineralization of dentin. Remineralization was compared between a continuous remineralization approach and a nonbuffered static approach using solutions of the same initial composition. Artificial carious lesions were treated for 5 days and analyzed every 24 h using nanoindentation in water, SEM, and AFM. The continuous approach yielded a recovery of mechanical properties of up to 60% of normal dentin, whereas the static approach led to recovery of only 10%. Image analysis revealed that the static approach yielded the formation of areas suggestive of an apatite precipitate on the surface of the dentin matrix. In contrast, surface precipitate was absent using the continuous approach, suggesting that mineral formed within the lesion and re‐associated with the collagenous matrix. This study provided evidence that mechanical recovery of dentin in near physiological conditions is attainable through the continuous delivery of calcium and phosphate ions. SCANNING 32: 312–319, 2010. © 2010 Wiley Periodicals, Inc.