Effect of Etching Time and Acid Concentration on Micromorphological Changes in Dentin of Both Dentitions

Gateva, Natalia; Gusyiska, Angela; Stanimirov, Pavel; Kabaktchieva, Rossitza; Raĭchev, I

doi:10.5272/jimab.2016222.1099

Cited by 11 publications

(10 citation statements)

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“…The results of the current study showed that citric acid 20% gives low bond strength (19.20 ± 4.59 MPa) that was in accordance with Gateva et al who stated that etching dentin with high concentration of acids can result in excessive intertubular dentin demineralization and collagen collapse, which lead to the perceptation of calcium phosphate crystals and hence protective layer will be formed which cannot be completely infiltrated by the adhesive resin [27] .…”

Section: Discussionsupporting

confidence: 89%

Microtensile Bond Strength and Nanoleackage of Dentin Surfaces Pretreated With Different Etching Materials

Aziz

Imam

2018

Egyptian Dental Journal

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This in-vitro study aimed to evaluate microtensile bond strength and nanoleackage of dentin surfaces pretreated with different etching materials. Twenty four extracted human intact second molar were selected and debrided to remove remnants of periodontal ligaments. Occlusal surfaces were flattened to expose a flat area of dentin under copious water coolant. One dentin bonding system (Te-Econom Bond) and one dental resin composite restoration (Tetric N-Ceram) were used for the study. The teeth were divided into four groups (6 each) according to the type of etchant material used as follows: group A -citric acid 6%, group B -citric acid 10%, group C -citric acid 20%, and group D-phosphoric acid 37%. The etchants were applied for 15 seconds to the dentin surface. After which teeth were washed, dried, then bonding agent was applied followed by the resin composite restoration. Then a longitudinal sectioning of restored teeth was made to obtain composite-dentin beams of (0.9 x 0.9 mm) in area. Each beam was composed of composite and dentin with adhesive at the interface. The microtensile bond strength (μTBS) was measured and the nanoleakage was observed using SEM. Data was then recorded, tabulated and statistically analyzed. There was no statistical significant difference between the results of the μTBS of groups A, B and D while group C has the lowest microtensile bond strength (19.20± 4.59). For all groups, nanoleackage was more demonstrated at group C and D, while group B show mild nanoleackage and no nanoleackage was observed for group A. It was concluded that low concentrations of citric acid was effective as etchant material compared to phosphoric acid on dentin surface in terms of microtensile bond strength and nanoleakage. (4004)

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Section: Discussionsupporting

confidence: 89%

Microtensile Bond Strength and Nanoleackage of Dentin Surfaces Pretreated With Different Etching Materials

Aziz

Imam

2018

Egyptian Dental Journal

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“…The prepared tooth surface was not subjected to any ST in Group I; hence, a layer of inorganic debris (smear layer) prevailed on the surface of the tooth. [ 13 17 18 21 22 23 ] Group II revealed the presence of residual silicone film interspersed with smear layer. Hence, the reduced SBS[ 24 25 ] indicating adhesive type of failure.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the effect of silicone residue after different surface treatments on shear bond strength of glass ionomer cement to the dentin surface

Anusha

Sajjan

Raju

et al. 2019

J Indian Prosthodont Soc

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Aim: Use of silicone fit-checking material during cementation of fixed restoration has shown to leave residual silicone film after peeling off of fit checker (FC). This residual film reduced bond strength of cement to the inner surface of restoration. Silicone residue effect on tooth surface needs to be studied. The aim of this study was to evaluate the effect of residual silicone film on shear bond strength (SBS) of glass ionomer cement (GIC) to dentin surface and the efficacy of different surface treatments (STs) on dentin in the removal of silicone residue. Materials and Methods: Fifty freshly extracted human molars were individually mounted on acrylic blocks and occlusal surfaces were ground flat until dentine surface was exposed. Specimens were divided into five groups as follows: Group I: without application of FC ( n = 10) as control group; Group II: without any ST after peeling off FC ( n = 10); Group III: ST using wet pumice after peeling off FC ( n = 10); Group IV: ST with 37% phosphoric acid after peeling off FC ( n = 10); and Group V: ST with 10% polyacrylic acid after peeling off FC ( n = 10). GIC was placed on the dentinal surface using polyvinyl mold and subjected to SBS test using universal testing machine. The debonded specimens were observed under stereomicroscope for the mode of failure. Selected debonded dentinal surfaces from each group were examined under scanning electron microscope. One-way analysis of variance and Tukey's test. Results: Group II (1.083 MPa) showed significantly lower SBS. Among the STs, Group III (2.047 MPa) was comparable to the control group whereas Group IV (1.376 MPa) and Group V (1.63 MPa) were significantly lower. There was no significant association between failures and groups at P = 0.257. Conclusion: The residue of silicone was demonstrable on dentin surface after peeling off FC and caused a significant reduction in SBS between GIC and dentin. ST with wet pumice is found to be beneficial in removing silicone residue and improving SBS, followed by phosphoric acid and polyacrylic acid.

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“…Acid was then rinsed and reapplied for 3 minutes, representing maximum dentin permeability. While the other halve were treated with the same acid gel for 15 seconds,representing minimum dentin permeability "dentin sensitivity" (13,14) . Treatments were topically applied to the cavities of the samples according to their division.…”

Section: Preparation Of Specimens For Dentin Permeability (Dye Penetrmentioning

confidence: 99%

Clinical and Laboratory Evaluation of the Efficacy of Three Different Treatment Modalities in Management of Dentin Hypersensitivity

Mosleh¹,

Niazy²,

El-yassaky

2018

ADJ-for Girls

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Objectives:-This study was conducted to evaluate the clinical and laboratory effect of three different treatment modalities in management of dentin hypersensitivity. Materials and methods: one hundred-twenty samples were used in the study procedures, for dentin permeability test and Scanning Electron Microscopic examination (SEM). The samples were randomly divided into two groups Group A 1 , totally removed smear layer Group A 2 , partially removed smear layer. Each group was further subdivided into four subgroups according to the treatment agent applied: ammonium hexafluorosilicate (SiF) gel, propolis extract, Curodont D'senz and the control group that were left untreated. One hundred and five (105) hypersensitive teeth were enrolled for this study. The subjective assessment of dentin hypersensitivity was done before application of the agent (baseline) then immediate, 1 week, 2 weeks, 4 weeks and 3 months respectively. Patients were asked to rate their perception to tactile, air and cold stimuli by using Verbal Rating Scale (VRS) and Visual Analogue Scale (VAS). Results: Permeability results revealed that there were high statistical significant difference between the study groups with lowest statistically significant mean depth of dye penetration values were found with propolis treated samples. The results of the clinical study revealed that there was high significant difference between pain scores before and after treatment for all tested groups. Conclusion: Propolis extract, Curodont D'senz and SiF gel were effective in reducing dentin permeability, occluding dentinal tubules and alleviating the hypersensitivity symptoms, with propolis extract paste being the most effective within 1 to 2 weeks and sustained up to 3 months.

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Effect of Etching Time and Acid Concentration on Micromorphological Changes in Dentin of Both Dentitions

Cited by 11 publications

References 0 publications

Microtensile Bond Strength and Nanoleackage of Dentin Surfaces Pretreated With Different Etching Materials

Microtensile Bond Strength and Nanoleackage of Dentin Surfaces Pretreated With Different Etching Materials

Evaluation of the effect of silicone residue after different surface treatments on shear bond strength of glass ionomer cement to the dentin surface

Clinical and Laboratory Evaluation of the Efficacy of Three Different Treatment Modalities in Management of Dentin Hypersensitivity

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