- Auteur(s) : Halina Ey-Chmielewska, Joanna Janiszewska-Olszowska, Iwona Noceń, Piotr Stępień, Anna Czajkowska, Bogumiła Frączak, Krystyna Opalko
, Department of Dental Prosthetics Pomeranian Medical University of Szczecin, Department of Orthodontics Pomeranian Medical University of Szczecin, Department of Medical Chemistry Pomeranian Medical University of Szczecin, Institute of Mechatronics, Nanotechnology and Vacuum Technique, Koszalin University of Technology, Department of Propedeutics of Dentistry and Dental Physiodiagnostics Pomeranian Medical University of Szczecin, Poland
- Mots-clés : permanent teeth, mineral content, occlusal wear
- Page(s) : 13-6
- DOI : 10.1684/mrh.2011.0270
- Année de parution : 2011
Aim. To compare the mineral content of the dentin of worn versus unworn teeth.
Material and methods. Coronal dentin samples were collected from twenty one premolar teeth extracted for prosthetic or periodontal indications, including 11 intact teeth and 10 teeth with a significant occlusal wear. Samples were placed in concentrated nitric acid and diluted 500 times for the analysis of calcium and magnesium content and 11 times for the analysis of zinc. Contents of calcium, magnesium and zinc ions were established by means of atomic absorption spectrometry in an oxygen acetylene flame. The content of phosphorus was established by means of spectrophotometry using a test basing on a reaction of colour phosphoric-molybdenic complex formation. Data normality was assessed with Shapiro-Wilk test. Student's t-test was used for all comparisons.
Results. A statistically significantly higher content of magnesium and a lower Ca/Mg ratio were found in worn teeth at the 5% level. The concentrations of the other minerals analysed were not significantly different between the worn and intact teeth at the 5% level.
Conclusion. Higher magnesium content in the dentin of human worn teeth may constitute a defence reaction to dentin exposure.