Mechanisms of Acid Dissolution of Biological and Synthetic Apatite Crystals at the Lattice Pattern Level

Daculsi, Guy; Kerébel, B; Kerebel, Lise‐Marie

doi:10.1159/000260411

Cited by 29 publications

(9 citation statements)

References 19 publications

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“…Concentration gradients of elements such as carbonate and fluoride through the thickness of enamel [Lammers et al, 1992] together with surface wear may well result in localised ionic compositional differences in enamel as teeth age . The variations in chemical composition and crystallinity of enamel have been reported to influence its susceptibility to acid [Daculsi et al, 1979;Koulourides and Cameron 1980], which may well contribute to the observations in the present study.…”

Section: Discussionsupporting

confidence: 56%

Human Enamel as a Substrate for in Vitro Acid Dissolution Studies: Influence of Tooth Surface and Morphology

Tucker

Adams²,

Shaw³

et al. 1998

Caries Res

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The variation in susceptibility of enamel to acid dissolution has been quantitatively assessed in vitro by examination of different surfaces of both maxillary and mandibular teeth of different morphology obtained from a pool of sound human teeth. The lingual/palatal surfaces of all teeth showed greater susceptibility to acid dissolution than the corresponding labial/buccal surfaces. The palatal surface of the maxillary teeth appeared more susceptible to acid than the lingual surface of the corresponding teeth in the mandible. The palatal surfaces of the maxillary teeth showed least variation in acid susceptibility, whilst the lingual surfaces of mandibular teeth and buccal/labial surfaces of teeth from both jaws showed much more variation between teeth of different morphology. These differences in susceptibility to acid dissolution probably reflect both developmental differences and post-eruptive changes in enamel and may contribute to the clinical presentation of dental disease. Importantly, the data indicates that careful selection of teeth for in vitro study of enamel dissolution processes is essential to minimise inter-sample variation. For such purposes, the palatal surface of the maxillary teeth appears to be most suitable.

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Section: Discussionsupporting

confidence: 56%

Human Enamel as a Substrate for in Vitro Acid Dissolution Studies: Influence of Tooth Surface and Morphology

Tucker

Adams²,

Shaw³

et al. 1998

Caries Res

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“…For naturally‐created CAD, the literature reports lower bond strengths compared to SD,2, 12, 13, 15, 16 which is in agreement with the findings observed in the present study. Monomer infiltration and resin tag formation was probably hampered by a partial or complete obliteration of tubules and intertubular dentin by mineral deposition 17–20. The thicker collagen‐rich zone in CAD might have been caused by less lateral infiltration of resin monomer from the dentinal tubules and deeper dentin demineralization after H 3 PO 4 etching 17…”

Section: Discussionmentioning

confidence: 99%

“…Monomer infiltration and resin tag formation was probably hampered by a partial or complete obliteration of tubules and intertubular dentin by mineral deposition. [17][18][19][20] The thicker collagen-rich zone in CAD might have been caused by less lateral infiltration of resin monomer from the dentinal tubules and deeper dentin demineralization after H 3 PO 4 etching. 17 The limited size and shape of naturally-formed CAD create technical difficulties when investigators attempt to measure resin composite bond strengths using conventional testing methods.…”

Section: Discussionmentioning

confidence: 99%

In vitro μTBS of one‐bottle adhesive systems: Sound versus artificially‐created caries‐affected dentin

et al. 2007

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This in vitro study aimed to evaluate a pH-cycling model for simulation of caries-affected dentin (CAD) surfaces, by comparing the bond strength of etch-and-rinse adhesive systems on sound and artificially-created CAD. Dentin substrates with different mineral contents and morphological patterns were created by submitting buccal bovine dentin to the following treatments: (1) immersion in artificial saliva during the experimental period (sound dentin, SD), or (2) induction to a CAD condition by means of a dynamic pH-cycling model (8 cycles, demineralization for 3 h followed by mineralization for 45 h). The bond strength of Excite or Prime and Bond NT adhesive systems was assessed using the microtensile bond strength (microTBS) test. Dentin microhardness was determined by cross-sectional Knoop evaluations. Resin-dentin morphology after the treatments was examined by scanning electron microscopy. SD produced significantly higher microTBS than CAD for both adhesives evaluated, without differences between materials. CAD exhibited lower microhardness than SD. Morphological analysis showed marked distinctions between SD and CAD bonded interfaces. Under the conditions of this study, differences in morphological pattern and dentin mineral content may help to explain resin-dentin bond strengths. The proposed pH-cycling model may be a suitable method to simulate CAD surfaces for bonding evaluations.

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“…7, 8) and sup port other electron microscopic studies of both carious enamel [Johnson, 1967b] and of acid-treated enamel , It is not clear whether these crystals exist in some form before the acid or caries attack [Scot/ et al, 1974], or are formed as part of a remineralization phase [Johnson, 1967b] and contain more fluoride as might be in dicated by their isometric hexagonal shape [Daculsi et al, 1979]. Since most white spots do not progress to form clinical caries [Backer-Dirks, 1966], many white spots represent arrested caries which may indicate a potential for remineralization in the prism border areas.…”

Section: Discussionmentioning

confidence: 99%

Ultrastructure of Striations in Carious Human Enamel

Simmelink

Nygaard²

1982

Caries Res

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A correlated microradiographic-transmission electron microscopic study examined incipient caries in human enamel from the enamel surface through the body of the lesion. In sections parallel to enamel prisms in the body of the lesion, cross-striations are accentuated as 3–4 μm wide, light and dark bands. In the more radiolucent striations, crystals are reduced in number as well as in length with some showing longitudinal splitting. In sections with prisms cut in cross-section, most crystals exhibit central dissolution except for isometric hexagonal crystals bordering a gap at the prism periphery. Eventually a complete loss of crystals from prism cores occurs. Asymmetric widening of the gap at the prism borders may be associated with the striae of Retzius. Possible causes for differences in the rate of crystal dissolution in alternating striations are discussed.

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Mechanisms of Acid Dissolution of Biological and Synthetic Apatite Crystals at the Lattice Pattern Level

Cited by 29 publications

References 19 publications

Human Enamel as a Substrate for in Vitro Acid Dissolution Studies: Influence of Tooth Surface and Morphology

Human Enamel as a Substrate for in Vitro Acid Dissolution Studies: Influence of Tooth Surface and Morphology

In vitro μTBS of one‐bottle adhesive systems: Sound versus artificially‐created caries‐affected dentin

Ultrastructure of Striations in Carious Human Enamel

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