In vitro action of Bordeaux red wine on the microhardness of human dental enamel

Lupi-Pégurier, Laurence; Muller, M; Leforestier, Eric; Bertrand, Marie-France; Bolla, Michèle Muller

doi:10.1016/s0003-9969(02)00206-6

Cited by 45 publications

(37 citation statements)

References 16 publications

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“…Without considering variations of indentation loads and time, the results obtained for the KHN and VHN values of enamel and dentin in this study are in accordance with previously published values: for example, the hardness of enamel has been reported in the range of 314 to 361 KHN 18 or 322 to 353 VHN 6 . For dentin, the hardness has been reported in the range of 52 to 64 KHN 14,19 or 46 to 53 VHN 15 .…”

Section: Discussionsupporting

confidence: 92%

“…Numerous previous microhardness studies reported results of both KHN and VHN at different indentation loads and times [4][5][6][7][8][13][14][15] . There are many reasons to perform tests at different conditions.…”

Section: Discussionmentioning

confidence: 99%

“…There is no agreement on the specifications of the conditions for the test method of a tooth. An examination of the literature reveals that previous studies have used different indenters and various loads and times to investigate the hardness of enamel and dentin [4][5][6][7][8] . From the HK and HV equations, the microhardness value should be constant when loads are varied, because the indentation size increases with an increase in the load.…”

Section: Introductionmentioning

confidence: 99%

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Effect of indentation load and time on knoop and vickers microhardness tests for enamel and dentin

2009

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The aim of this study was to determine the effect of variations in indentation load and time on the Knoop and Vickers hardness numbers (KHN and VHN) for enamel and dentin. Twenty molar teeth were divided into twenty enamel and twenty dentin specimens. Each specimen was tested using a Knoop or Vickers microhardness tester at different loads and times. The difference in hardness between the groups was analyzed with two-way ANOVA followed by a Tukey test. The results revealed that a difference of indentation time did not influence the microhardness number of enamel and dentin. The KHN values of enamel and the VHN values of dentin were affected by variation of test loads. Therefore, the tooth hardness number for different loads may not be acceptable for comparison.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of indentation load and time on knoop and vickers microhardness tests for enamel and dentin

2009

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“…12 Limited accessibility of hand hygiene facilities has been shown to be an important risk factor for poor adherence to recommendations. 13 Our survey responses showed that although there are a number of limitations in current-health care settings, they have positive attitude towards limiting infection control. Majority of the participants had received the training about the importance of hand hygiene in their respective institutions and the importance of hand hygiene is emphasized by their clinical supervisors.…”

mentioning

confidence: 78%

Knowledge, Attitude and Practice of nursing students on Hospital Acquired Infections in Western region of Nepal

Paudel

Ghosh

Adhikari

2016

J Coll Med Sci-Nepal

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Background & Objectives: Hospital-acquired infections (HAIs) are a common problem and challenge faced by hospitals in all countries around the world. Nurses are an important part of the healthcare team that plays a unique role in the control of HAIs. Compliance on the part of healthcare workers (HCWs) including nurses with standard precautions has been recognized as being an efficient means to prevent and control HAIs. The present study was conducted with objective of understanding the level of Knowledge, attitude and practice (KAP) regarding HAIs among nursing students in the Western Region of Nepal. Materials & Methods: This descriptive cross-sectional study was conducted among nursing students posted in different wards of two hospitals of Pokhara. A self administered questionnaire containing different set of questions regarding knowledge, attitude and practice on HAI were used for data collection. Results: Among the total participants in the study 97% of the participants considered that prevention of HAIs were a valuable part of nurses' role but only 89% had received formal training regarding hand hygiene. The results show that 74% of the participants had good knowledge regarding HAIs. 82% of the participants felt that they would be less likely to transmit infection to the patient if they performed handhygiene. 66% of them identified that hand hygiene agents were not readily available in current settings. Regarding practice, only 6% performed hand hygiene before patient contact. Conclusion: The nursing students had good knowledge regarding HAIs that was reflected in their attitude and practice on hand hygiene for the prevention of HAIs. However there is the need of regular training and performance feedback regarding hand hygiene and the hospital environment should be handhygiene friendly with easily accessible to sinks and other facilities.

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“…8) Systemic conditions and medical diseases like gastro-esophageal reflux and anatomic predisposition in enamel structure (hypoplasia for instance) are considered to be risk factors 9) .…”

Section: Original Articlesmentioning

confidence: 99%

The use of sub-ablative Er:YAG laser irradiation in prevention of dental caries during orthodontic treatment

et al. 2014

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Purpose: This « in-vitro » study had two specific aims: the first, to test using a universal testing machine whether sub-ablative Er:YAG laser irradiation prior to acid etching is effective in orthodontic bracket bonding and secondly using micro-hardness measurements and Scanning Electron Microscopy (SEM) observations to investigate the effectiveness of de-mineralization reduction in enamel treated with sub-ablative Er:YAG laser irradiation followed by fluoride varnish application. Materials and Methods: One hundred and eighty bovine permanent maxillary incisors were selected for shear bond strength testing and microhardness measurements. Sub-ablative Er:YAG laser irradiation was set at a power density of 2.5 J/cm 2 , a frequency of 7 Hz and air/water spray. Brackets were bonded with an auto-curing resin paste. The shear bond strength was measured comparing laser irradiated and non-irradiated enamel surface, followed by SEM observation of the bracket-resin-enamel interface. Microhardness measurements were made on enamel samples before treatment, after samples preparation, and after demineralization. Results: While the adhesion of orthodontic brackets to bovine enamel after sub-ablative Er:YAG laser irradiation and acid etching is comparable to that obtained after conventional acid etching, the effect of laser irradiation associated with topical application of fluoride varnish increases the microhardness of enamel. Conclusion: Sub-ablative Er:YAG laser irradiation before the acid etching doesn't reduce the shear bond whereas when associated with fluoride application it may play a role in caries prevention. Further studies will be necessary to establish the mechanism by which the protective laser activated fluoride effect is achieved.

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In vitro action of Bordeaux red wine on the microhardness of human dental enamel

Cited by 45 publications

References 16 publications

Effect of indentation load and time on knoop and vickers microhardness tests for enamel and dentin

Effect of indentation load and time on knoop and vickers microhardness tests for enamel and dentin

Knowledge, Attitude and Practice of nursing students on Hospital Acquired Infections in Western region of Nepal

The use of sub-ablative Er:YAG laser irradiation in prevention of dental caries during orthodontic treatment

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