Enamel, dentine and pulp in talon primary maxillary central incisors: A histomorphometric study
- 46 Downloads
Aim: To examine whether a talon incisor has an abnormal shape due to excess of either dental hard tissues or pulp. Methods: Two bilateral primary maxillary central incisors with talon cusp and a supernumerary mesiodens were removed from a 6-year-old boy. Histologically, 7 undecalci-fied cross sections (70 µm) were harvested from each talon tooth and from two regular primary central incisors of another child. Microradiographs of the sections were prepared and examined for enamel width, dentine width, pulp tissue area, and crown size (mesio-distal, labio-palatal) using Image Analysis. Results: No association to other developmental disorders was observed. The mean width of the enamel and dentine was similar in the talon and the regular incisors (difference 7.5% and 2.4%, respectively). The pulp area was greater in the talon teeth (37.4%). The latter had an effect on the increase in the mesio-distal and labio-palatal dimensions of the talon teeth (17.6% and 23.9%, respectively). Conclusions: The fact that the talon cusp has normal enamel and dentine layers with a substantial enlarged pulp tissue suggests that talon tooth may be a developmental anomaly originating in the stage of morphodifferentiation.
Key wordstalon enamel dentine pulp dens evaginatus
Unable to display preview. Download preview PDF.
- Hattab FN, Yassin OM, Al-Nimri KS. Talon cusp in permanent dentition associated with other dental anomalies: review of literature and report of seven cases. J Dent Child. 1996;63:368–76.Google Scholar
- Mader CL, Kellogg SL. Primary talon cusp. J Dent Child. 1985;52:223–6.Google Scholar
- Mitchell WH. Case report. Dent Cosm. 1892;34:1036.Google Scholar
- Paulsen, AC, Plymate SR. “Klinefelter’s syndrome.” In The Genetic Basis of Common Diseases. eds. King RA, Rotter JI and Motulsky AG. Oxford Monographs on Medical Genetics, Oxford University Press, Oxford, England 1992:885.Google Scholar
- Salama FS, Hanes CM, Hanes PJ, Ready MA. Talon cusp: a review and two case reports on supernumerary primary and permanent teeth. J Dent Child. 1990;57:147–50.Google Scholar
- Sicher S, Bhaskar SN. Orban’s Oral Histology and Embryology. 7th ed. St. Louis: CV Mosby Co; 1972.Google Scholar