Dentine structure and mineralization in hypocalcified amelogenesis imperfecta: a quantitative X-ray histochemical study |
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Authors: | Sánchez-Quevedo M C Ceballos G García J M Luna J D Rodríguez I A Campos A |
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Affiliation: | Departamento de Histología, Facultad de Medicina y Odontología, Universidad de Granada, Granada, Spain. mcsanchez@histolii.ugr.es |
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Abstract: | 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. |
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Keywords: | tooth calcification dentine enamel amelogenesis imperfecta |
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