Scanning and transmission electron microscopy of enamel formation and structure in the molar teeth of rats

Skobe, Ziedonis; Stern, Doris N.

doi:10.1016/0003-9969(78)90024-9

Cited by 15 publications

(11 citation statements)

References 9 publications

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“…These results are in accordance with the SEM studies by Skobe and Stern [ 1978]. For this reason, too, the experimen tal animal most frequently taken in caries research may be considered suitable for in vivo remineralization studies.…”

Section: Discussionsupporting

confidence: 80%

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In vivo Remineralization of Etched Human and Rat Enamel

Gängler¹,

I²

1984

Caries Res

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A method is described for observation of in vivo reminerahzation after acid etching of human and rat teeth under standardized conditions. Surface morphology was studied on SEM pictures (× 300–10,000). Three types of etch patterns were encountered varying from tooth to tooth and from surface to surface. In general, two different reminerahzation patterns were found in human enamel characterized by prism orientation and a homogeneously mineralized coating, respectively. Reminerahzation in human enamel was always incomplete. In rat molars, a predominantly homogeneous remineralization pattern was observed; the surface morphology was similar to that of sound rat enamel.

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Section: Discussionsupporting

confidence: 80%

“…Exposure to the oral en vironment led to a homogeneously miner alized surface and absence of prism-orien tated areas. This picture was similar to the sound buccal enamel of molars in rats [Skobe and Stern, 1978] and was almost identical with type II of remineralization in humans ( fig. 4c).…”

Section: Resultssupporting

confidence: 60%

In vivo Remineralization of Etched Human and Rat Enamel

Gängler¹,

I²

1984

Caries Res

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“…The structure of mouse molar enamel has many features in common with rat molar enamel (Skobe and Stern, 1978;Risnes, 1979a). The characteristic uniserial lamellar prism pattern (Korvenkontio, 1934) present in the incisor enamel dominates also in the molars.…”

Section: Enamel Structurementioning

confidence: 99%

“…One reason for this may be the small size of these teeth, making sectioning and preparation for scanning electron microscopy technically demanding. Another reason may be that the ultrastructure of mouse molar teeth is assumed to be similar to the rat (Skobe, 1978;Risnes, 1979a). We report here a scanning electron microscope study of the mouse molar dentition, with emphasis on crown morphology, enamel distribution, and enamel structure/ultrastructure.…”

mentioning

confidence: 97%

Crown morphology, enamel distribution, and enamel structure in mouse molars

Lyngstadaas¹,

Møinichen²,

Risnes³

1998

Anat. Rec.

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Background: Biomolecular research and genetic manipulations have stressed the importance of thorough knowledge of normal organ morphology. Mouse molar teeth are convenient models for studying basic interactions in organ development and morphogenesis. The aim of the present study was to provide basic information on their morphology.Methods: Intact and sectioned/ground molars of mice of various ages were observed with SEM.Results: Enamel-free areas (EFA) were present on cusp tips at time of eruption. The dominating structural configuration in enamel was prism decussation in inner enamel and parallel prisms in outer enamel. Prism decussation tended to be absent at cusp ridges and in the bottom of grooves. In the former location, the distinction between prisms and interprism was often obscured in the middle enamel zone due to decreased difference in orientation of their crystals. A thin layer of enamel, often aprismatic, covered the distal aspect of cusps in maxillary molars and the mesial aspect of cusps in mandibular molars. The enamel abutting on EFA was often aprismatic. Aprismatic enamel exhibited incremental lines with a periodicity of about 1 m and was often traversed by cracks. The enamel surface was porous in the bottom of grooves. Parts of mouse molar enamel were incompletely mineralized at the time of eruption.Conclusions: SEM is a convenient method for combined studies of crown morphology and enamel structure. Based on morphological criteria, a modification of the cusp nomenclature is proposed. Enamel thickness and structure in mouse molars show regional variations. Fundamental similarities exist between mouse molar cusps and mouse incisors. Mouse molar enamel undergoes posteruptive maturation. Anat.

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“…The significant result pertaining to the extent and nature of prism decussation is that HSBs are less pronounced in areas where there is a fossa; this property of human teeth is similar to that of rodent molars, which have no decussation in fissure areas (Skobe and Stern, 1978). It is interesting that the distal fossa has less pronounced decussation than the mesial fossa (Fig.…”

Section: Discussionmentioning

confidence: 93%

Individual variation in enamel structure of human mandibular first premolars

Stern

Skobe

1985

American J Phys Anthropol

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Nine human mandibular first premolars were examined to assess variation in external morphology and enamel structural organization within a tooth type. The relationship of enamel ultrastructure to gross dental morphology was also studied. The teeth were cut in the mesiodistal direction just lingual to the buccal cusp, and etched. Montages were constructed of the cut enamel surface photographed in the scanning electron microscope at 100 X magnification. Parameters were measured and correlation coefficients were calculated for the comparison of various odontometric features. The mesiodistal and buccolingual dimensions were highly correlated and the occlusal thickness of enamel was significantly correlated to crown height but not crown width. Hunter-Schreger bands were less pronounced in fossa areas than at lateral aspects, cusps, or ridges; these bands were directly related to the geometry of the tooth. It was concluded that within this tooth type, there is a large amount of individual variation not only in gross morphology but also in enamel ultrastructure. This result underscores the fact that interspecific comparisons must be made with care.

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Scanning and transmission electron microscopy of enamel formation and structure in the molar teeth of rats

Cited by 15 publications

References 9 publications

In vivo Remineralization of Etched Human and Rat Enamel

In vivo Remineralization of Etched Human and Rat Enamel

Crown morphology, enamel distribution, and enamel structure in mouse molars

Individual variation in enamel structure of human mandibular first premolars

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