Effects of chemical agents on physical properties and structure of primary pulp chamber dentin

Pascon, Fernanda Miori; Kantovitz, Kamila Rosamilia; Gaspar, Juliana Franciele; Paula, Andréia Bolzan de; Puppin-Rontani, Regina Maria

doi:10.1002/jemt.22312

Cited by 4 publications

(2 citation statements)

References 28 publications

(45 reference statements)

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“…The studies that examined roughness employed intact teeth where the crown and/or root was sectioned and tested for either Knoop hardness or Vickers hardness. Nearly all studies looking at the effects of SH tested human permanent teeth, while one study assessed deciduous teeth [ 42 ] and only two studies tested bovine dentine [ 43 , 44 ].…”

Section: Resultsmentioning

confidence: 99%

Alkaline Material Effects on Roots of Teeth

Shetty

Kahler

2017

Materials

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The aim of this review was to identify and analyse all studies related to the effects of alkaline materials used in dentistry on roots of teeth. The first part of the review focused on mechanical property alterations of root dentine due to sodium hypochlorite (SH) used as an irrigant solution based on MeSH (Medical Subject Heading) terms from a previous study by Pascon et al in 2009. The second part reviewed literature on calcium hydroxide (CH), mineral trioxide aggregate (MTA) and other alkaline materials used as root canal dressings or filling materials. Additional MeSH terms used included “compressive strength”, “elastic modulus” “flexural strength”, “fracture strength” and “fracture resistance”. The language filter was English. Of the initial 205 articles identified, 49 were included in this review, of which 29 were on SH, 21 on CH/MTA, and 1 relating to both. Many in vitro studies indicated a strong link between reduced mechanical properties of roots of teeth or radicular dentine treated with SH, and when sealers or root fillings with CH- or MTA-based materials were placed in contact with roots or radicular dentine. Recent literature indicates that the association between reduced mechanical properties and alkaline sealers and/or root-filling materials is not as straightforward as previously assumed, and requires further investigation using more valid experimental models.

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Section: Resultsmentioning

confidence: 99%

Alkaline Material Effects on Roots of Teeth

Shetty

Kahler

2017

Materials

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“…The use of 1% sodium hypochlorite was also verified to possess a softening ability on dentin, 5 , 6 however, Pascon et al. reported that dentin immersed in 1% NaOCl showed no significant change in both microhardness and roughness 7 . Aydin et al.…”

Section: Introductionmentioning

confidence: 99%

Influence of the acidity of electrolyzed water on the microhardness of inner layer dentin

Chen

Wei

et al. 2019

Journal of Dental Sciences

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Background/purposeElectrolyzed water has been identified as an effective disinfectant that could represent as an alternative to sodium hypochlorite. Unfortunately, it remains unclear whether the texture or physical properties of dentin are affected by the application of electrolyzed water of different acidities. This study was aimed to assess the influence of electrolyzed waters with differing pHs on the demineralizing of inner dentin.Materials and methodsThe coronal superficial dentin of 20 human molars was exposed and further bisected into two pieces perpendicular to the dentin surface. The samples were immersed in strongly acidic electrolyzed water (AW group), neutral electrolyzed water (NW group), 5% sodium hypochlorite (positive control, NL group), or deionized water (negative control, DW group). Microhardness of the inner layer dentin was measured at a depth of 25 and 50 μm beneath the superficial surface layer every 5 up to 60 min.ResultsAt a depth of 25 μm, microhardness decreased with increasing immersion time in all but the DW group. The AW group exhibited a decreasing trend from the first 5 min that became significant after 35 min of immersion and was the most rapid decrease in the four groups. The rate of decline in the NW group was low and similar to that of the NL group. Both NW and NL groups exhibited significantly less demineralization than the AW group after 15 min of immersion. No significant microhardness change was found at a depth of 50 μm in any of the samples.ConclusionAW produces a more pronounced softening of dentin than NW at a depth of 25 μm.

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