scholarly journals Dental Wear: A Scanning Electron Microscope Study

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Luca Levrini ◽  
Giulia Di Benedetto ◽  
Mario Raspanti
Keyword(s):  
Current Knowledge ◽  
Human Teeth ◽  
Scanning Electron Microscope Study ◽  
Dental Wear ◽  
Dentinal Tubules ◽  
Etiological Factors ◽  
Specific Morphology ◽  
Lesion Type ◽  
Different Types ◽  
Scanning Electron

Dental wear can be differentiated into different types on the basis of morphological and etiological factors. The present research was carried out on twelve extracted human teeth with dental wear (three teeth showing each type of wear: erosion, attrition, abrasion, and abfraction) studied by scanning electron microscopy (SEM). The study aimed, through analysis of the macro- and micromorphological features of the lesions (considering the enamel, dentin, enamel prisms, dentinal tubules, and pulp), to clarify the different clinical and diagnostic presentations of dental wear and their possible significance. Our results, which confirm current knowledge, provide a complete overview of the distinctive morphology of each lesion type. It is important to identify the type of dental wear lesion in order to recognize the contributing etiological factors and, consequently, identify other more complex, nondental disorders (such as gastroesophageal reflux, eating disorders). It is clear that each type of lesion has a specific morphology and mechanism, and further clinical studies are needed to clarify the etiological processes, particularly those underlying the onset of abfraction.

scholarly journals Effects of Dentifrices Containing Nanohydroxyapatite on Dentinal Tubule Occlusion—A Scanning Electron Microscopy and EDX Study

2020 ◽  
Vol 10 (18) ◽  
pp. 6513
Author(s):  
Emilia Bologa ◽  
Simona Stoleriu ◽  
Gianina Iovan ◽  
Cristina Angela Ghiorghe ◽  
Irina Nica ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Study Groups ◽  
Control Group ◽  
Dentinal Tubule ◽  
Human Teeth ◽  
Dentinal Tubules ◽  
Mineral Deposition ◽  
Tubule Occlusion ◽  
Scanning Electron

This in vitro study evaluated the effects of dentifrices containing nano-hydroxyapatite (n-HAp) on dentinal tubule occlusion and on mineral deposition. Dentin specimens of ten human teeth were submersed for 30 s in 40% citric acid and then randomly divided into four groups (three study groups and one control group). In the study groups, the dentin samples were exposed to three different n-HAp toothpastes: Karex (Dr. Kurt Wolff GmbH & Co. KG, Bielefeld, Germany), Biorepair Plus Sensitive (Coswell SpA, Bologna, Italy), and Dr. Wolff’s Biorepair (Dr. Kurt Wolff GmbH & Co. KG, Bielefeld, Germany); in the control group no toothpaste was applied. All of the samples were evaluated using scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) analysis. In the control group all of the samples showed a frank and wide opening of the dentinal tubules, whereas in the study groups different degrees of tubule closure by mineral depositions were observed. Toothpastes containing n-HAp determined a significant occlusion of dentinal tubules and a significant increase of mineral deposition on the dentin surface. All three tested toothpastes showed similar results regarding the degree of dentinal tubule closure. Varying degrees of differences in calcium, phosphate, carbon, and oxygen ion concentrations among the three tested toothpastes were obtained.

Scanning Electron Microscope Study of Surface Characteristics of Abrasive Materials

1974 ◽  
Vol 96 (3) ◽  
pp. 145-156 ◽  
Author(s):  
R. Komanduri ◽  
M. C. Shaw
Keyword(s):  
Chemical Properties ◽  
Surface Characteristics ◽  
Scanning Electron Micrographs ◽  
Physical And Chemical Properties ◽  
Scanning Electron Microscope Study ◽  
Abrasive Grains ◽  
Different Types ◽  
Physical And Chemical ◽  
Scanning Electron ◽  
And Chemical Properties

Scanning electron micrographs of different types of commercial abrasive grains used in grinding are discussed. Surface topography is found useful, along with other physical and chemical properties, in characterizing abrasive materials. The results of this study explain some of the differences in performance of several types of abrasive presently used in grinding practice.

A Scanning Electron Microscope Study of Washer-Dryer Abrasion in Textiie Fibers

1970 ◽  
Vol 28 ◽  
pp. 346-347
Author(s):  
Wilton R. Goynes
Keyword(s):  
Electron Microscope ◽  
Electron Microscope Study ◽  
Cotton Fabrics ◽  
Cross Linking ◽  
Scanning Electron Microscope Study ◽  
Durable Press ◽  
Transmission Electron ◽  
Different Types ◽  
Ultrathin Sections ◽  
Scanning Electron

The reaction of cellulose with certain cross-linking agents has produced cotton fabrics with outstanding durable press characteristics. However, many of these reactions decrease the natural abrasion resistance of the fiber. Wet abrasion and dry abrasion are known to produce different types of damage in the cotton fiber. It was of interest to determine whether such differences occur in the machine washing and drying of cotton fabrics. To study this problem, both untreated and cross-linked cotton fabrics were made into trouser cuffs, washed repeatedly and line dried, or machine dried until extensive damage had occurred. The two reacted fabrics studied had been treated with dimethyloldihydroxyethyleneurea and tris(l-aziridinyl) phosphine oxide. Cuene solubility tests on ultrathin sections of fibers from th ese fabrics observed with the transmission electron microscope indicated that the fibers were uniformly cross-linked throughout.

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