منابع مشابه
Peritubular dentin lacks piezoelectricity.
Dentin is a mesenchymal tissue, and, as such, is based on a collagenous matrix that is reinforced by apatite mineral. Collagen fibrils show piezoelectricity, a phenomenon that is used by piezoresponse force microscopy (PFM) to obtain high-resolution images. We applied PFM to image human dentin with 10-nm resolution, and to test the hypothesis that zones of piezoactivity, indicating the presence...
متن کاملPeritubular hypercalcified zone of mammalian dentin.
According to FUJITA (1957) and TAKUMA (1960), the structure of the dentinal tubule wall in human dentin has been studied by KOLLIKER, NEUMANN, WALKHOFF, FLEISCHMANN, HANAZAWA, MEYER and ORBAN. Recently, TAKUMA and TSUCHIKURA (1950) found by means of the electron microscope that the dentinal tubules were lined with a hypercalcified area, and designated it as peritubular hypercalcified matrix. Th...
متن کاملDecreased dentin tubules density and reduced thickness of peritubular dentin in hyperbilirubinemia-related green teeth
BACKGROUND It is stated anecdotally that patients with liver diseases in childhood who develop green teeth have increased risk for rampant caries, which may be secondary to changes in dental structure. The aim of this study was to test the hypothesis that hyperbilirubinemia affects the dentin morphology of green teeth. MATERIAL AND METHODS Sixteen primary teeth were prepared and divided into ...
متن کاملThe composition of bovine peritubular dentin: matching TOF-SIMS, scanning electron microscopy and biochemical component distributions. New light on peritubular dentin function.
Peritubular dentin (PTD) is a hypermineralized phase within the dentinal tubules in some vertebrate teeth as an interface between the intertubular dentin (ITD) and the cell processes. Our aim has been to understand the composition, structure and role of PTD as a mineralized tissue. We have utilized the technique of time of flight secondary ion mass spectrometry (TOF-SIMS) to map the distributio...
متن کاملScanning electron microscopic observation of the peritubular zone in dentin sclerosis.
ISOKAWA, TODA and KUBOTA[1] etched fractured human dentin surfaces with a weak acid and observed that a part of the peritubular zone persisted as a recognizable tubular structure. The inner hypomineralized layer (SHROFF, WILLIAMSON and BERTAUD [2], SHROFF et al. [3] and TAKUMA [4]) which appeared in the tubular structure was assumed to play an important role. ISOKAWA et al. [1] also presumed di...
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ژورنال
عنوان ژورنال: Journal of Dental Research
سال: 2007
ISSN: 0022-0345,1544-0591
DOI: 10.1177/154405910708600920