The effect of two different calcium hydroxide combinations on root dentine microhardness

Yoldaş, Oğuz; Doğan, Cem; Şeydaoğlu, Gülşah

doi:10.1111/j.1365-2591.2004.00885.x

Cited by 30 publications

(34 citation statements)

References 26 publications

(63 reference statements)

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“…Traditional work focusing on mechanical properties of radicular dentine after exposure to various root canal irrigants and/or medicaments has utilized Knoop or Vickers indentation techniques to measure microhardness [9][10][11]. However, there are limitations associated with the use of this regular indentation technique to determine radicular dentine microhardness.…”

Section: Manuscriptmentioning

confidence: 99%

A novel approach to evaluate the effect of medicaments used in endodontic regeneration on root canal surface indentation

Yassen¹,

Chu²,

Gallant³

et al. 2013

Clin Oral Invest

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Objectives: To investigate the capability of a novel reference point indentation apparatus to test the indentation properties of root canal surface dentine treated with three intracanal medicaments used in endodontic regeneration. Materials and Methods:Immature human premolars were selected (n=22). Four specimens were obtained from each root and randomly assigned to three treatment groups and a control group. Each specimen was exposed to one of three treatment pastes (triple antibiotic (TAP), double antibiotic (DAP), or calcium hydroxide [Ca(OH) 2 ] or neutral de-ionized water (control) for one or four weeks. After each time-interval, the indentation properties of the root canal dentine surfaces were measured using a BioDent reference point indenter. Two-way ANOVA and Fisher's Protected Least Significant Differences were used for statistical analyses.Results: Significant differences in indentation parameters and estimated hardness between all groups at both time points were found. TAP treated dentine had the highest significant indentation parameters, followed by DAP treated dentine, untreated control dentine and Ca(OH) 2 treated dentine, respectively. Furthermore, TAP treated dentine had the lowest significant estimated hardness, followed by DAP treated dentine, untreated control dentine and Ca(OH) 2 treated dentine, respectively. Conclusion: BioDent reference point indenter was able to detect significant differences in indentation properties of root canal dentine treated with various medicaments.Clinical Relevance: The use of a reference point indenter is a promising approach to characterize the indentation properties of root canal surfaces without any surface modification. This might provide an in vitro mechanical measurement that is more representative of the actual clinical situation.

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Section: Manuscriptmentioning

confidence: 99%

A novel approach to evaluate the effect of medicaments used in endodontic regeneration on root canal surface indentation

Yassen¹,

Chu²,

Gallant³

et al. 2013

Clin Oral Invest

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“…PiezonMaster 400 (Electro Medical Systems [EMS], Richardson, TX) was the ultrasonic unit used in this experiment. Microstone (Whip Mix Corporation, Louisville, KY) was mixed according to manufacturer's instruction and 5-mm thick dental stone blocks were made and set for at least 48 h before the experiment to have the hardness similar to dentin (15,16). All ultrasonic tips were operated under minimal power setting on the dial of the ultrasonic generator.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of Cutting Efficiency of Ultrasonic Tips Used in Orthograde Endodontic Treatment

Lin¹,

Mickel²,

Jones³

et al. 2006

Journal of Endodontics

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“…For dentin, the hardness has been reported in the range of 52 to 64 KHN 14,19 or 46 to 53 VHN 15 . The standard deviation of hardness in this study showed a broad variation, similar to previous reports 16 .…”

Section: Discussionmentioning

confidence: 99%

“…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%

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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The effect of two different calcium hydroxide combinations on root dentine microhardness

Abstract: The use of Ca(OH)2 combinations for intracanal dressing softens dentine.

Cited by 30 publications

References 26 publications

A novel approach to evaluate the effect of medicaments used in endodontic regeneration on root canal surface indentation

A novel approach to evaluate the effect of medicaments used in endodontic regeneration on root canal surface indentation

Evaluation of Cutting Efficiency of Ultrasonic Tips Used in Orthograde Endodontic Treatment

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

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