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Dentine structure and mineralization in hypocalcified amelogenesis imperfecta: a quantitative X-ray histochemical
M C Sánchez-Quevedo1, G Ceballos, J M García
1Departamento de Histología, Facultad de Medicina y Odontología, Universidad de Granada, Granada, Spain. mcsanchez@histolii.ugr.es
Objective:
This study was undertaken in order to establish the structural and mineralization pattern of the response of dentine to alterations in enamel in hypocalcified amelogenesis imperfecta (AI).
Design:
The images and data obtained with scanning electron microscopy and electron probe X-ray microanalysis in enamel and dentine specimens from control and affected teeth were compared in this study.
Patients And Methods:
We compared 46 fragments of permanent teeth from patients with clinically diagnosed hypocalcified AI and 20 normal permanent teeth. All specimens were prepared for electron probe X-ray microanalysis.
Results:
Dentine is characterized by thickening of the peritubular dentine and partial obliteration of the dentinal tubules that does not give rise to a compact sclerotic cast. In dentine, calcium levels were significantly higher in teeth with clinically hypocalcified AI in relation with control teeth (P < 0.001).
Conclusions:
Dentine is affected in hypocalcified AI increasing mineralization (narrower tubules and higher content of calcium) in response to enamel disorder.