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Scanning electron microscopy examination of resorbing enamel surfaces in unexfoliated primary molar teeth.
ASDC J Dent Child. 1998 May-Jun; 65(3):182-5.AJ

Abstract

We examined unexfoliated primary molar teeth by scanning electron microscopy to study the resorbing internal enamel surfaces. They were fixed in a cacodylate buffered glutaraldehyde-formaldehyde mixture, treated with 2 percent sodium hypochlorite, washed, dehydrated with ethanol and air-dried, before sputter-coating with a 40 nm layer of gold. The examination with a Jeol 6100 scanning electron microscope revealed large areas of enamel resorption, characterized by closely adjoining honeycomb-like lacunae (concavities). In higher magnification, lacunae show enamel with various patterns of resorption: whereas in some regions, only the central portions of prisms are removed; in others, the prism sheath regions are seen below the other enamel structures. Also, regions showing a random pattern of resorption are observed. In addition, lacunae showing resorbing enamel prisms in longitudinal and other orientations are also observed. The results of the present study reveal, therefore, that in unexfoliated primary teeth, the odontoclasts first remove the coronal dentin and then reach and resorb large areas of enamel. Furthermore, the various patterns of resorption support the idea that removal of enamel by odontoclasts depends upon the orientation of enamel structures, rather than of the different degrees of mineralization suggesting that enamel structures do not possess different inorganic/organic composition.

Authors+Show Affiliations

Department of Histology and Embryology, University of São Paulo, Brazil. vearana@usp.brNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

9668946

Citation

Arana-Chavez, V E., and R Y. Andia-Merlin. "Scanning Electron Microscopy Examination of Resorbing Enamel Surfaces in Unexfoliated Primary Molar Teeth." ASDC Journal of Dentistry for Children, vol. 65, no. 3, 1998, pp. 182-5.
Arana-Chavez VE, Andia-Merlin RY. Scanning electron microscopy examination of resorbing enamel surfaces in unexfoliated primary molar teeth. ASDC J Dent Child. 1998;65(3):182-5.
Arana-Chavez, V. E., & Andia-Merlin, R. Y. (1998). Scanning electron microscopy examination of resorbing enamel surfaces in unexfoliated primary molar teeth. ASDC Journal of Dentistry for Children, 65(3), 182-5.
Arana-Chavez VE, Andia-Merlin RY. Scanning Electron Microscopy Examination of Resorbing Enamel Surfaces in Unexfoliated Primary Molar Teeth. ASDC J Dent Child. 1998 May-Jun;65(3):182-5. PubMed PMID: 9668946.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Scanning electron microscopy examination of resorbing enamel surfaces in unexfoliated primary molar teeth. AU - Arana-Chavez,V E, AU - Andia-Merlin,R Y, PY - 1998/7/21/pubmed PY - 1998/7/21/medline PY - 1998/7/21/entrez SP - 182 EP - 5 JF - ASDC journal of dentistry for children JO - ASDC J Dent Child VL - 65 IS - 3 N2 - We examined unexfoliated primary molar teeth by scanning electron microscopy to study the resorbing internal enamel surfaces. They were fixed in a cacodylate buffered glutaraldehyde-formaldehyde mixture, treated with 2 percent sodium hypochlorite, washed, dehydrated with ethanol and air-dried, before sputter-coating with a 40 nm layer of gold. The examination with a Jeol 6100 scanning electron microscope revealed large areas of enamel resorption, characterized by closely adjoining honeycomb-like lacunae (concavities). In higher magnification, lacunae show enamel with various patterns of resorption: whereas in some regions, only the central portions of prisms are removed; in others, the prism sheath regions are seen below the other enamel structures. Also, regions showing a random pattern of resorption are observed. In addition, lacunae showing resorbing enamel prisms in longitudinal and other orientations are also observed. The results of the present study reveal, therefore, that in unexfoliated primary teeth, the odontoclasts first remove the coronal dentin and then reach and resorb large areas of enamel. Furthermore, the various patterns of resorption support the idea that removal of enamel by odontoclasts depends upon the orientation of enamel structures, rather than of the different degrees of mineralization suggesting that enamel structures do not possess different inorganic/organic composition. SN - 1945-1954 UR - https://www.unboundmedicine.com/medline/citation/9668946/Scanning_electron_microscopy_examination_of_resorbing_enamel_surfaces_in_unexfoliated_primary_molar_teeth_ DB - PRIME DP - Unbound Medicine ER -