Morphological study of amelogenesis in the rat lower incisor after thyro-parathyroidectomy, parathyroidectomy and thyroidectomy

Cell and Tissue Research
Ana Carolina AcevedoM Goldberg

Abstract

The effects of thyro-parathyroidectomy, parathyroidectomy or thyroidectomy upon enamel formation in the rat incisor were studied. One control group and four groups of surgically treated rats were used: parathyroid autotransplanted, thyroidectomized, parathyroidectomized, and thyro-parathyroidectomized. One month after surgery, the incisors were processed for light and electron microscopy. The present study revealed perturbations of the Tomes process morphology, of the rod pattern in the inner enamel formation, of the enamel surface, and of the mineralization after thyro-parathyroidectomy. After parathyroidectomy, only mineralization defects could be visualised. No effects were observed in enamel after thyroidectomy. A severe hypocalcemic state as seen in thyro-parathyroidectomized rats affects the enamel shape, and mineralization, and the morphology and function of secretory ameloblasts. Knowledge of the way in which the alteration of the enamel surface is produced should contribute to a better understanding of the development of tooth enamel.

Citations

Feb 22, 2005·Archives of Oral Biology·Paulo M YamagutiAna Carolina Acevedo
Jan 5, 2002·Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research·R S MathiasP K Denbesten
Dec 1, 2004·Journal of Applied Oral Science : Revista FOB·Eliana Mitsue TakeshitaKikue Takebayashi Sassaki
Jul 18, 2000·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·A NanciE Bonucci
Dec 20, 2002·Connective Tissue Research·A C AcevedoS Risnes
Aug 26, 1998·Journal of Oral Pathology & Medicine : Official Publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology·R PerniolaC De Rinaldis

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