Silica-induced Precipitation of Calcium Phosphate in the Presence of Inhibitors of Hydroxyapatite Formation

Damen, J.J.M.; Cate, J.M. ten

doi:10.1177/00220345920710030601

Cited by 74 publications

(49 citation statements)

References 14 publications

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“…We have notified the ATCC of the corrected identifications of C. durum strains ATCC 33449 and ATCC 33822. C. matruchotii has been used by a number of researchers as a microbiologic model for intracellular calcification (1,3,8,9,21,25). The organism has provided valuable information regarding calcification of bioprostheses (17), dental plaque (10), and the principles of membrane-mediated proteolipid-dependent calcification in vertebrate systems (2).…”

Section: Discussionmentioning

confidence: 99%

Diversity within Reference Strains of Corynebacterium matruchotii Includes Corynebacterium durum and a Novel Organism

et al. 2001

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Corynebacterium matruchotii has been the subject of numerous dental pathogenesis studies. The purpose of the present study was to resolve concerns about diversity within the reference strains of C. matruchotii through analysis of seven strains procured from the American Type Culture Collection (ATCC). Analysis of whole-cell fatty acid profiles with the library generation software of Microbial ID Inc. revealed that three types of organisms have been deposited in the ATCC as C. matruchotii. These three groups of organisms were also distinguishable by DNA-DNA dot blot hybridization, by sequences of two hypervariable regions of the 16S rRNA gene, and by the pyrrolidonyl arylamidase test. These studies indicate that two C. matruchotii reference strains, ATCC 33449 and ATCC 33822, are members of the recently proposed species, Corynebacterium durum. The colonial morphology and biochemical reactions of the C. durum strains are more diverse than originally reported. Strain ATCC 43833 is unique and represents a novel species. In addition to the type strain, ATCC 14266, true members of the species C. matruchotii include ATCC strains 14265, 33806, and 43832 plus two reference strains, L2 and Richardson 13, which comprise the vast majority of strains used in dental pathogenesis research with this species.The seminal paper by Gilmour et al. (13) provided an accurate description of Bacterionema matruchotii and clearly distinguished it from members of the genus Leptotrichia and from other organisms with which it had been confused, including Cladothrix matruchotii, Leptothrix buccalis, Leptotrichia buccalis, and Leptotrichia dentium. Based on chemotaxonomic characteristics, Bacterionema matruchotii was assigned to the genus Corynebacterium by Collins et al. in 1982 (5).When this laboratory evaluated the API Rapid CORYNE identification system (Biomérieux Vitek, Inc., Hazelwood, Mo.), it was discovered that reactions of Corynebacterium matruchotii had been omitted from its database (12). Since the database included most other recognized Corynebacterium species of human origin, we suspected that the developers had encountered some unresolvable discrepancies with representative strains of this species. To explore this possibility, we purchased all strains of C. matruchotii available at the American Type Culture Collection (ATCC). Because a large body of work has been published on the possible role of C. matruchotii in the pathogenesis of dental plaque, caries, and periodontitis, we also included two additional strains of C. matruchotii that were used in many of these studies, namely strain L2 and Richardson's strain 13 (22, 23).The present study was designed to examine the taxonomic relatedness of commercially available and other reference strains of C. matruchotii. The question was addressed on the basis of whole-cell fatty acid analyses, DNA-DNA dot blot hybridizations, sequencing of two hypervariable regions of the 16S rRNA gene, and biochemical reactions. The results indicate that the seven ATCC strains deposited as C. matruchot...

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Section: Discussionmentioning

confidence: 99%

Diversity within Reference Strains of Corynebacterium matruchotii Includes Corynebacterium durum and a Novel Organism

et al. 2001

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“…The defect margins were observed, experimental side (right) was showed a radiopacity as well as the control side (left). 27 Radiograph of group B grafted with enamel matrix derivative alone and 32 control side( empty cavity ) healing period 8 weeks. The defect margin were observed, experimental side (left) was showed a radiopacity as well as the control side (right).…”

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confidence: 99%

“…The effect of bioactive glass on cellular activity observed in tissue culture studies may contribute to the inhibition of epithelial downgrowth noted in the repair of bony defects in a primate model. 26,27 The mechanism of this phenomenon may be related to rapid collagen attachment to the silica-gel surface of the reactive bioactive glass particle. The rapidly formed connective-tissue seal may serve to block epithelial downgrowth.…”

mentioning

confidence: 99%

Effects of Enamel Matrix Derivative on Bioactive Glass in Rat Calvarium Defects

Potijanyakul

Sattayasansakul²,

Pongpanich³

et al. 2010

Journal of Oral Implantology

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“…One hypothesis for the effectiveness of fluorida tion observed with SiF is that Si may catalyze the fluorida tion process. Recently, silica has attracted attention because of its catalytic effect on HAP formation [Damen and ten Cate, 1992;L ietal., 1993b;Li et al, 1992;Li et al, 1993c;Li et al, 1993a]. If the formation of FAP occurs via slight dis solution of HAP followed by recrystallization with F, the catalytic effect of Si with respect to the fluoridation process seems reasonable.…”

Section: Discussionmentioning

confidence: 99%

“…However, silicon does not affect tooth color, an advantage for clinical dental use. In addition, silicon is known to catalyze hydroxyapatite (HAP) forma tion [Damen and ten Cate, 1992;Li et al, 1993b;Li et al, 1992;Li et al, 1993c;Li et al, 1993a], and thus could show similar catalytic effects in the remineralization process if it remains on the surface of teeth. In addition, Na2SiFft is used in some areas for the fluoridation of drinking water along with NaF.…”

mentioning

confidence: 99%

Fluoridation of Hydroxyapatite Powder by Ammonium Hexafluorosilicate

Murata¹,

Ishikawa

Tenshin³

et al. 1996

Caries Res

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Diamine silver fluoride [AgF: (NH₃)₂AgF] is a unique fluoride solution used clinically in Japan for primary teeth. AgF has been shown to reduce dental caries and dentine hypersensitivity. However, AgF also stains teeth black due to sulfide precipitation and thus is unacceptable for permanent teeth. In the present study, the potential value of ammonium hexafluorosilicate [SiF: (NH₄)₂SiF₆], which has a formula similar to that of AgF but contains no Ag, was studied with respect to its ability to fluoridate apatite. Hydroxyapatite [HAP: Ca₁₀(PO₄)₆(OH)₂] powder was treated with several topical fluoride solutions, i.e. neutral sodium fluoride, acidulated phosphate fluoride (APF) along with AgF and SiF. Following treatment, the HAP powders were analyzed for their fluorine content, crystal -linity changes, and solubility in acidic solution. The highest level of fluoridated HAP [FAP: Ca₁₀(PO₄)₆(OH)xF_2––x] was observed in HAP powder treated with SiF, even though more total fluorine in the form of FAP and CaF₂ was observed in HAP powder samples treated with APF. Presumably as a consequence of this higher level of FAP formation after SiF treatment, the highest level of crystallinity along with the lowest solubility in acidic solution were observed in HAP powder treated with SiF solution. We concluded, therefore, that SiF may have potential value for use as a topical fluoride solution.

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Silica-induced Precipitation of Calcium Phosphate in the Presence of Inhibitors of Hydroxyapatite Formation

Cited by 74 publications

References 14 publications

Diversity within Reference Strains of Corynebacterium matruchotii Includes Corynebacterium durum and a Novel Organism

Diversity within Reference Strains of Corynebacterium matruchotii Includes Corynebacterium durum and a Novel Organism

Effects of Enamel Matrix Derivative on Bioactive Glass in Rat Calvarium Defects

Fluoridation of Hydroxyapatite Powder by Ammonium Hexafluorosilicate

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