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1.
Braz. dent. sci ; 26(4): 1-12, 2023. ilus, tab
Article in English | LILACS, BBO | ID: biblio-1516483

ABSTRACT

Objective: to investigate the effect of two natural cross-linkers on microtensile bond strength (µTBS) and evaluate their influence on the durability of the resin dentin bonds. Material and Methods: the Moringa oleifera and Centella asiatica plant extracts were qualitatively tested with high-performance thin layer chromatography (HPTLC) for the presence of phenols. The phenolic content ranged from 27 to 30 gallic acid equivalents (GAE), µg/mg of dry weight. After etching, two concentrations (5% and 1%) of these two extracts were prepared and used as pretreatment liners on dentin. They were applied for a min. After restoration with resin composite, dentin resin beams were prepared. The study groups were 5% Moringa, 1% Moringa 5% Centella 1% Centella, and control (without cross-linker application). For each group, half of the samples underwent µTBS testing after 24 hours, while the remaining half were immersed in artificial saliva to assess the bond's longevity after 6 months of ageing. Statistical analysis was performed using one-way ANOVA followed by Tukey's post hoc test. Results: both 5% and 1% Moringa showed a significant difference (p<0.05) compared to the other groups at both intervals. However, after ageing, the specimens in the control and 1% Centella groups resulted in a significant decrease in µTBS. Conclusion: overall, both concentrations of Moringa (5% and 1%) were effective in stabilising the bond during both intervals.(AU)


Objetivo: investigar o efeito de dois reticuladores naturais na resistência de união (µTBS) à microtração e avaliar sua influência na durabilidade da adesão da resina à dentina. Material e Métodos: extratos das plantas Moringa oleifera e Centella asiatica foram qualitativamente testados através de cromatografia em camada fina de alta performance (HPTLC) para a presença de fenóis. O conteúdo fenólico alcançou entre 27 a 30 equivalentes de ácido gálico (GAE), µg/mg de peso seco. Após o condicionamento, duas concentrações (5% e 1%) dos extratos foram preparadas e utilizadas como forros de pré-tratamento em dentina. Eles foram aplicados por um minuto. Após a restauração com resina composta, palitos de dentina e resina foram preparados. Os grupos foram 5% Moringa, 1% Moringa, 5% Centella, 1% Centella e controle (sem aplicação de reticulador). Para cada grupo, metade das amostras foram submetidas ao teste µTBS após 24 horas, enquanto a outra metade foi imersa em saliva artificial para avaliar a longevidade adesiva após 6 meses de envelhecimento. Foi realizada análise estatística através de ANOVA 1-fator, seguido do teste post hoc de Tukey. Resultados: ambas as concentrações de 5% e 1% de Moringa demonstraram diferença significativa (p<0.05) comparadas aos outros grupos em ambos os intervalos. No entanto, após o envelhecimento, os espécimes dos geupos controle e 1% de Centella resultaram em uma redução significativa de µTBS. Conclusão: no geral, ambas as concentrações de Moringa (5% e 1%) foram efetivas em estabelecer a adesão em ambos os intervalos (AU)


Subject(s)
Humans , Dentin-Bonding Agents/analysis , Composite Resins/analysis , Cross-Linking Reagents/analysis , Centella/chemistry , Moringa oleifera/chemistry , Flavonoids/chemistry , Plant Extracts/chemistry , Chromatography, High Pressure Liquid , Tooth Injuries , Fibrillar Collagens/metabolism , Polyphenols/chemistry
2.
Braz. dent. sci ; 25(3): 1-10, 2022. ilus, tab, graf
Article in English | LILACS, BBO | ID: biblio-1373126

ABSTRACT

Objective: This study aimed to evaluate the effect of calcium hydroxide and triple antibiotic paste as intracanal medication on the interappointment pain at 8, 24, and 48 hours postoperatively in patients with symptomatic apical periodontitis undergoing multiple visit root canal treatment. Material and Methods: Two hundred and seven systemically healthy patients under the age group of 18-45 years with mandibular molars presenting with symptomatic apical periodontitis which require root canal treatments were included in this study. After access cavity preparation, cleaning and shaping was done till ISO 25 size file, and the patients were randomized into three groups (each group of 69 samples). Group I: no medicament, group II: calcium hydroxide and group III: triple antibiotic paste (TAP). Postoperative pain was evaluated at 8 hours, 24 hours and 48 hours. Results: The results showed that at 8 hours, 24hours and 48hours, there was a statistical difference between I and III (p < 0.05); and Group III and Group II (p < 0.05). Within the group, there was a statistical difference at all time points IN Group I and II (p < 0.05) except between 24 hours and 48 hours in the Group III (p > 0.05). Conclusion: Within the limitations of this study, TAP was more effective than calcium hydroxide in relieving pain and reducing the analgesic intake at the first 24hours.(AU)


Objetivo: Este estudo teve como objetivo avaliar o efeito do hidróxido de cálcio e da pasta tripla de antibiótico como medicação intracanal na dor na interconsulta às 8, 24 e 48 horas de pós-operatório em pacientes com periodontite apical sintomática submetidos ao tratamento endodôntico por múltiplas visitas. Material e Métodos: Duzentos e sete pacientes sistemicamente saudáveis com idade inferior a 18-45 anos com molares inferiores apresentando periodontite apical sintomática que requerem tratamento de canal radicular foram incluídos neste estudo. Após o preparo da cavidade de acesso, a limpeza e modelagem foram feitas até arquivo ISO 25, e os pacientes foram randomizados em três grupos (cada grupo de 69 amostras). Grupo I: sem medicamento, grupo II: hidróxido de cálcio e grupo III: pasta tripla de antibiótico (TAP). A dor pós-operatória foi avaliada em 8 horas, 24 horas e 48 horas. Resultados: Os resultados mostraram que às 8 horas, 24 horas e 48 horas, houve diferença estatística entre I e III (p <0,05); e Grupo III e Grupo II (p <0,05). Dentro do grupo, houve diferença estatística em todos os momentos do Grupo I e II (p <0,05), exceto entre 24 horas e 48 horas no Grupo III (p>0,05). Conclusão: Dentro das limitações deste estudo, o TAP foi mais eficaz do que o hidróxido de cálcio no alívio da dor e na redução da ingestão de analgésicos nas primeiras 24 horas. (AU)


Subject(s)
Humans , Male , Female , Adolescent , Adult , Pain , Periapical Periodontitis , Calcium Hydroxide , Pharmaceutical Preparations , Antibiotic Prophylaxis
3.
Braz. dent. sci ; 25(4): 1-6, 2022. tab, ilus
Article in English | LILACS, BBO | ID: biblio-1400990

ABSTRACT

Objective: The current study aimed at assessing the induced apical pressure at various simulated irrigant flow rates. Materials and Methods: Forty eight freshly extracted single-rooted premolars were decoronated and prepared to size 30 0.04 taper using HY-Flex CM rotary file system and were scanned using cone-beam computed tomography (CBCT). The scanned images were reconstructed to three-dimensional Computer-aided design models (CAD) and the 3D needle was also reconstructed. Finally, simulations were done by placing the 30 gauge open-ended needle 3 mm short of the working length. Results: There was a statistically significant difference (p<0.05) among the different groups compared. 1 ml/min flow rate induced the least apical pressures (p<0.05) as compared to the other types. Conclusion: 1 ml/min flow rates induced the least apical pressures when open-ended needles are used for irrigation.(AU)


Objetivo: O presente estudo teve como objetivo avaliar a indução de pressão apical em várias taxas de fluxo irrigante simuladas. Material e Métodos: Quarenta e oito raízes de pré-molares unirradiculares recém extraídos tiveram suas coroas removidas, foram preparados para uma conicidade de tamanho 30 0.04 através de um sistema rotatório de limas HYFlex CM e foram escaneados via tomografia computadorizada cone-beam (CBCT). As imagens escaneadas e as agulhas para irrigação foram reconstruídas em modelos tridimensionais de design assistido por computador (CAD). Ao final, foram feitas simulações através de agulhas de calibre 30 e 3 mm a menos que o comprimento de trabalho. Resultados: Houve diferença estatisticamente significativa (p<0.05) entre os diferentes grupos. A taxa de fluxo de 1 ml/min induziu as menores pressões apicais (p<0.05) quando comparada às demais taxas. Conclusão: Taxas de fluxo de 1 ml/min induziram as menores pressões apicais quando agulhas de ponta aberta foram utilizadas para irrigação (AU)


Subject(s)
Pressure , Bicuspid , Tomography, X-Ray Computed , Dental Pulp Cavity
4.
Braz. dent. sci ; 24(4): 1-11, 2021. tab, graf
Article in English | LILACS, BBO | ID: biblio-1337565

ABSTRACT

Objective: This study aimed to evaluate the effect of calcium hydroxide and triple antibiotic paste as intracanal medication on the interappointment pain at 8, 24, and 48 hours postoperatively in patients with symptomatic apical periodontitis undergoing multiple visit root canal treatment. Material and Methods: Two hundred and seven systemically healthy patients under the age group of 18-45 years with mandibular molars presenting with symptomatic apical periodontitis which require root canal treatments were included in this study. After access cavity preparation, cleaning and shaping was done till ISO 25 size file, and the patients were randomized into three groups (each group of 69 samples). Group I: no medicament, group II: calcium hydroxide and group III: triple antibiotic paste (TAP). Postoperative pain was evaluated at 8 hours, 24 hours and 48 hours. Results: The results showed that at 8 hours, 24hours and 48hours, there was a statistical difference between I and III (p < 0.05); and Group III and Group II (p < 0.05). Within the group, there was a statistical difference at all time points IN Group I and II (p < 0.05) except between 24 hours and 48 hours in the Group III (p > 0.05). Conclusion: Within the limitations of this study, TAP was more effective than calcium hydroxide in relieving pain and reducing the analgesic intake at the first 24 hours (AU)


Objetivo: Este estudo teve como objetivo avaliar o efeito do hidróxido de cálcio e da pasta tripla de antibiótico como medicação intracanal na dor na interconsulta às 8, 24 e 48 horas de pós-operatório em pacientes com periodontite apical sintomática submetidos ao tratamento endodôntico por múltiplas visitas. Material e Métodos: Duzentos e sete pacientes sistemicamente saudáveis com idade inferior a 18-45 anos com molares inferiores apresentando periodontite apical sintomática que requerem tratamento de canal radicular foram incluídos neste estudo. Após o preparo da cavidade de acesso, a limpeza e modelagem foram feitas até arquivo ISO 25, e os pacientes foram randomizados em três grupos (cada grupo de 69 amostras). Grupo I: sem medicamento, grupo II: hidróxido de cálcio e grupo III: pasta tripla de antibiótico (TAP). A dor pós-operatória foi avaliada em 8 horas, 24 horas e 48 horas. Resultados: Os resultados mostraram que às 8 horas, 24 horas e 48 horas, houve diferença estatística entre I e III (p <0,05); e Grupo III e Grupo II (p <0,05). Dentro do grupo, houve diferença estatística em todos os momentos do Grupo I e II (p <0,05), exceto entre 24 horas e 48 horas no Grupo III (p> 0,05). Conclusão: Dentro das limitações deste estudo, o TAP foi mais eficaz do que o hidróxido de cálcio no alívio da dor e na redução da ingestão de analgésicos nas primeiras 24 horas. (AU)


Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Periodontitis , Calcium Hydroxide , Dental Pulp Cavity , Anti-Bacterial Agents
5.
Article | IMSEAR | ID: sea-215228

ABSTRACT

Dental composites form the main stay in majority of the restorative procedures due to their aesthetic properties and adhesive technology. The major disadvantage with these materials is that they have less abrasion resistance and they wear on clinical service. The aim of this study was to evaluate the wear resistance of mandibular molar class-1 composite restored teeth at different intervals of time. METHODSIn this retrospective pilot study, thirty patients were randomly selected with mandibular first and second molars restored with class-1 composite restorations and were grouped according to the retrospective clinical duration of the teeth restored as 1-3 years, 3-5 years and 5-7 years. High resolution images of these restorations were captured using DSLR with macro lens attached and assessed for surface irregularities and the clinical duration of the restoration was recorded. The images were magnified using NIH-IMAGE J and processed in Adobe Photoshop and digital optical surface profilometry was used to measure the irregularities formed on the surface of the restoration. RESULTSThere was a significant increase in the mean, maximum and minimum diameter of craters and notches formed between the three groups (p < 0.05). But there was no statistically significant difference that was seen with the area of tooth assessed, length and angle of craters formed (p > 0.05). CONCLUSIONSWear of the restorations increased on increased clinical duration and varied according to the dietary habits of the patients.

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