Morphology of the dentin on primary molars after the application of phosphoric acid under different conditions

Pimenta, Renata Antonini; Penido, Cláudia Valéria de Sousa Resende; Cruz, Roberval de Almeida; Alves, José Bento

doi:10.1590/s1806-83242010000300011

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…Preliminary to the observation we proceeded by etching the canal lumen with 37% orthophosphoric acid (Universal Etchant Scotchbond; 3M ESPE, St. Paul, USA) for 15 sec., washing with saline solution and metallizing [ 16 ]. Afterwards, all specimens were divided along the longitudinal axis using a coronal-apical groove such as a fracture guide.…”

Section: Methodsmentioning

confidence: 99%

“…A 2,500x was used to quantify dentinal tubules density and intertubular surface, while a 23,000x was used to evaluate tubule morphology. Three different areas (coronal, middle, and apical) of the root canal of each specimen were examined [ 16 , 17 ]. Within the same area of the canal, measurement was conducted by taking random references from three default areas that were 400 μ m 2 .…”

Section: Methodsmentioning

confidence: 99%

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Dentin Morphology of Root Canal Surface: A Quantitative Evaluation Based on a Scanning Electronic Microscopy Study

Giudice

Cutroneo

Centofanti

et al. 2015

BioMed Research International

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Dentin is a vital, hydrated composite tissue with structural components and properties that vary in the different topographic portions of the teeth. These variations have a significant implication for biomechanical teeth properties and for the adhesive systems utilized in conservative dentistry. The aim of this study is to analyse the root canal dentin going from coronal to apical zone to find the ratio between the intertubular dentin area and the surface occupied by dentin tubules varies. Observations were conducted on 30 healthy premolar teeth extracted for orthodontic reasons in patients aged between 10 and 14. A SEM analysis of the data obtained in different canal portions showed that, in the coronal zone, dentinal tubules had a greater diameter (4.32 μm) than the middle zone (3.74 μm) and the apical zone (1.73 μm). The average number of dentinal tubules (in an area of 1 mm2) was similar in coronal zone (46,798 ± 10,644) and apical zone (45,192 ± 10,888), while in the middle zone they were lower in number (30,940 ± 7,651). However, intertubular dentin area was bigger going from apical to coronal portion. The differences between the analysed areas must be considered for the choice of the adhesive system.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Dentin Morphology of Root Canal Surface: A Quantitative Evaluation Based on a Scanning Electronic Microscopy Study

Giudice

Cutroneo

Centofanti

et al. 2015

BioMed Research International

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“…Acid conditioning was performed with 35% phosphoric acid gel for 15 seconds in enamel and 7 seconds in dentin, 25 preceded by washing the cavity for 1 minute. Adhesive single bond universal (3M ESPE, São Paulo, SP, Brazil), São Paulo, SP, Brazil) was applied in 2 layers, interspersed by an air spray for 5 seconds, and light cured (1200 mW/ cm 2 ; Gnatus, Ribeirão Preto, SP, Brazil) following the manufacturer's instructions.…”

Section: Selective Removal Of Necrotic Dentinmentioning

confidence: 99%

Selective Removal of Necrotic Dentin in Primary Teeth Using Laser Irradiation: One-Year Clinical Evaluation of Composite Restorations

et al. 2019

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Introduction: This study aimed to evaluate the child’s salivary cortisol levels, clinical performance and marginal adaptation of restorations after selective removal of necrotic dentin in primary teeth using Er: YAG laser irradiation. Methods: A double-blind clinical study was performed in children at 7-10 years. Children who had at least 2 teeth with carious lesions involving the occlusal and proximal surfaces of primary molars counterparts were selected. Removal of necrotic dentin was performed by 2 methods: Er: YAG laser irradiation and bur-preparation. Cortisol levels (n =24) was evaluated by ELISA. Clinical analysis (n =20) was performed after the restorations polish, 6 and 12 months after restorative procedure using United States Public Health Service (USPHS) method and photographs. Scanning electron microscopy (SEM) was used to analyz the marginal gap formation (n =20). The analysis of the data was performed by 95% confidence interval, Shapiro-Wilk test, Friedman and Wilcoxon post hoc tests (α =5%). Results: Cortisol levels were higher during selective removal of necrotic dentin, regardless of the method used (P>0.05). After 12 months, there was no evidence of the difference in the restorations performed on cavities prepared by both methods. SEM analysis revealed that the laser-irradiated teeth showed 10% of gaps in the full extent of restoration. For bur-prepared teeth, 20% of gaps were found at the cavosurface margin. Conclusion: The salivary cortisol levels on children that received Er: YAG laser irradiation for removal the necrotic dentin was similar to the control group. Class II restorations evaluated after 1 year period did not suffer interference by the use of Er: YAG laser irradiation.

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“…Brasil). Nas cavidades médias, foi utilizado apenas o cimento de ionômero de vidro(Ketac Molar; 3M, São Paulo, Brasil).A cavidade foi condicionada com gel de ácido fosfórico 37% por 15 segundos em esmalte e 7 segundos em dentina(Van Meerbeek et al, 1994, Pimenta et al, 2010, lavagem da cavidade com água durante 1 minuto, remoção do excesso de água com cânula de sucção e posterior secagem da cavidade com bolinhas de algodão.O estresse da criança foi avaliado durante a remoção seletiva das lesões de cárie, por meio da dosagem dos níveis de cortisol salivar. criança permanecendo na cavidade bucal por 3 minutos e, na sequência, inserido no tubo coletor e armazenado em geladeira.…”

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Remoção seletiva de lesões de cárie em molares decíduos utilizando laser de Er:YAG: avaliação clínica das restaurações e dos níveis de cortisol salivar

Polizeli¹

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Minimally invasive dentistry suggests that during the preparation of cavity preparations, lesser amount of healthy dental substrate associated with the use of adhesive materials is removed, with the purpose of offering less anxiety and greater patient comfort during dental treatment. This study aimed to evaluate the salivary cortisol levels of the child during the selective removal of cáries lesions using Er:YAG laser and later longitudinal analysis of the restorations performed. Children between 7 and 10 years of age were selected to present two lesions of active cáries in dentin located on the occlusal and proximal surfaces (class II) of decíduous molars. The teeth of each child were distributed in two groups randomly: 1) Er:YAG laser (250mJ / 4 Hz) and 2) Conventional method (low rotation). The dosage of the hormone cortisol was performed by means of immunoenzymatic analysis of the saliva in 2 moments: 7 days before the procedures and during the removal of the cáries lesions. Indirect pulp protection was performed using calcium hydroxide cement and glass ionomer cement in the deep wells and only glass ionomer cement in the medium wells. The wells were prepared and then restored using the Adper Single Bond 2 / Filtek Supreme (3M) restorative system. For clínical analysis of the restorations, three calibrated and experienced professionals used the modified US Public Health Service criteria and photographic examination. For the analysis of the réplica of the restoration the teeth were cast and cast with epoxy resin. The marginal adaptation was analyzed by SEM. Clínical and réplicate analyzes were performed in the 7 day, 6 and 12 month periods after the restoration. Data were analyzed by ANOVA and Tukey's test (α = 5%). Cortisol levels were higher during the selective removal of cáries, regardless of the method used (p> 0.05). After 12 months, there was no evidence of difference in retention, marginal adaptation, discoloration, axial contour and secondary cáries of restorations performed in wells prepared by both methods. SEM analysis revealed that the laser irradiated teeth presented 10% of the total length of the restoration. For teeth prepared by the conventional method, 20% of the slits were found in the cavosuperficial margin. The use of the Er:YAG laser did not increase the levels of salivary cortisol when compared to the conventional method and did not influence the clínical performance of class II restorations, being an alternative method for the removal of cáries lesions in children.

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Morphology of the dentin on primary molars after the application of phosphoric acid under different conditions

Cited by 4 publications

References 8 publications

Dentin Morphology of Root Canal Surface: A Quantitative Evaluation Based on a Scanning Electronic Microscopy Study

Dentin Morphology of Root Canal Surface: A Quantitative Evaluation Based on a Scanning Electronic Microscopy Study

Selective Removal of Necrotic Dentin in Primary Teeth Using Laser Irradiation: One-Year Clinical Evaluation of Composite Restorations

Remoção seletiva de lesões de cárie em molares decíduos utilizando laser de Er:YAG: avaliação clínica das restaurações e dos níveis de cortisol salivar

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