A scanning electron microscopic study of the effect of various cleansing agents on cavity walls in vitro

Leidal, Torger Ingar; Eriksen, Harald M.

doi:10.1111/j.1600-0722.1979.tb00706.x

Cited by 21 publications

(23 citation statements)

References 18 publications

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“…The depth was also significantly less when the cavities restored with microfilled resin had been cleaned with Tubulicid than when they had been cleaned with water. Since both Tubulicid and citric acid have the capacity to remove the smear layer of debris from cavity walls (Leidal and Eriksen, 1979;Brinnstr6m et al, 1980), it appears from the analysis of the lesion depths that one of the important features in the reduction of lesion depth is the removal of the smear layer.…”

Section: Resultsmentioning

confidence: 98%

Artificial Caries around Restorations in Roots

Purton

Rodda

1988

J Dent Res

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An artificial caries technique was used to produce caries-like lesions in the cavity walls adjacent to microfilled resin restorations with and without dentin bonding agent, and glass-ionomer cement restorations, in the roots of extracted teeth. The lesions had histological characteristics similar to those of natural lesions and to those of the lesions produced by other experimental methods. The zonal pattern of the lesions was examined by means of polarized light microscopy and microradiography, and the depth of the lesions was measured for assessment of the microleakage around the restorations. Three cavity cleaning regimes-water spray alone, 50% citric acid, and a proprietary cleaner-were compared in conjunction with the three restorative methods. Cavity cleaning with the citric acid or the proprietary cleaner, and the use of a fluoride-releasing restorative material, acted to reduce the depths of the lesions. Glass-ionomer cement restorations in cavities cleaned with citric acid showed lesions significantly shallower than those treated with other restorations. The glass-ionomer cement was soluble in the acidic environment but promoted the precipitation of minerals in the lesions. The use of a dentin bonding agent did not affect the depth of demineralization around the microfilled resin restorations.

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Section: Resultsmentioning

confidence: 98%

Artificial Caries around Restorations in Roots

Purton

Rodda

1988

J Dent Res

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“…75 A further consideration is that 30 per cent hydrogen peroxide treatment of dentine may elicit a pulpal response by altering the extent of microleakage around a composite resin restoration. 76 …”

Section: Dental Pulpmentioning

confidence: 99%

Safety issues relating to the use of hydrogen peroxide in dentistry

Walsh

2000

Australian Dental Journal

126

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Hydrogen peroxide is used widely in professionally and self-administered products. Hydrogen peroxide is a highly reactive substance which can damage oral soft tissues and hard tissues when present in high concentrations and with exposures of prolonged duration. This report provides an overview of health issues relating to the use of hydrogen peroxide, with an emphasis on safety with prolonged exposure to low concentrations of peroxide products. There is good evidence for the safety of hydrogen peroxide when used at low concentrations on a daily basis over extended periods of time, in self-administered oral health care products such as dentifrices and mouthrinses. These low concentrations neither damage oral hard or soft tissues, nor do they pose a significant risk of adverse long-term effects. Caution should be exercised with the increasingly higher concentration peroxide products used for 'walking' or 'power' bleaching due to the possibility of chemical irritation of oral soft tissues with injudicious use. The volumes of material and application times should be controlled carefully. Thorough education of patients is particularly important with self-applied gels because of the lack of professional supervision with such products. Such education is part of the duty of care of the dentist who supplies bleaching gels for at-home use.

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“…It appears that procedures employed in normal cavity toilet such as the use of water-spray and hydrogen peroxide do not remove the smear layer and that only demineralizing solutions are able to perform this (6,7). Several of these are currendy marketed including phosphoric, polyacrylic and citric acids and EDTA-based solutions.…”

mentioning

confidence: 99%

“…Much controversy exists over the depth to which these conditioning agents penetrate the residual dentin and whether they injure the underlying pulp (6,(11)(12). Retief (13) has reported a severe reaction to phosphoric acid conditioner in monkeys and Macko et al (4) in humans, while Mjor et al (16) have reported little response to a variety of acids in the same animal.…”

mentioning

confidence: 99%

“…In the studies listed above by Retief (13), Macko et al (14) and Mjor (15) where the treated cavities were filled with an antibacterial cement, this is probably of no consequence. However, if the material used is not bactericidal, much of the resulting infiammation may be due to the penetration of micro-organisms into the opened tubules (6,18) rather than to the direct toxicity of the conditioning agent. This has been demonstrated in vivo by Tobias et al (19) and Browne et al (20) where pulpal responses were increased in conditioned cavities, apparently caused by enhanced bacterial microleakage.…”

mentioning

confidence: 99%

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Penetration of dentin by different conditioners in vitro: a quantitative study

Meryon

Tobias

Johnson

1988

Dental Traumatology

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Conditioning agents are known to remove the smear layer that forms on cut dentin with the resultant opening of the orifices of the dentinal tubules. However, much controversy exists over the depth to which these agents penetrate the residual dentin and whether they might damage the underlying pulp. In view of the enormous technical difficulties of studying the depth of penetration of such agents in vivo, an in vitro study was undertaken. Dentin slices of known thickness were prepared with an intact smear layer on both surfaces. The upper surface was treated with the test conditioner, and the depth of penetration was assessed using SEM by the degree of removal of the dentin plugs blocking the orifices of the dentin tubules in the lower untreated surface. No significant penetration of 200 μm slices occurred and only slight penetration of 100 and 50 μm slices. There was little difference in the degree of penetration achieved by the 5 agents studied. The results presented suggest that the chemical toxicity of the conditioners tested will not damage the pulp if the residual dentin depth is greater than 200 μm.

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A scanning electron microscopic study of the effect of various cleansing agents on cavity walls in vitro

Cited by 21 publications

References 18 publications

Artificial Caries around Restorations in Roots

Artificial Caries around Restorations in Roots

Safety issues relating to the use of hydrogen peroxide in dentistry

Penetration of dentin by different conditioners in vitro: a quantitative study

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