The luminous transmittance of the quartz-glass fiber posts is superior to glass fiber posts.

Fiber-reinforced prefabricated intraarticular posts have gained popularity due to several favorable characteristics for clinical use compared to metallic intraradicular posts. AIM: To evaluate the light transmission capacity of two types of fiber posts, using two different methods. MATERIALS AND METHOD: The posts were divided into two groups: experimental group - quartz-glass fiber posts (n=10) and control group - glass fiber posts (n=10). The light transmittance of the samples was compared by means of light intensity test by photographs and ultraviolet-visible spectrophotometer. This test was analyzed by thirds: coronal, middle, and apical. The spectophotometer tested the luminous transmittance along the length of the post. The statistical analysis was conducted with a significance level of 0.05. RESULTS: Light transmission was 97% on the coronal third, 68% in the middle third, and 27.66% in the apical third in the posts of the experimental group. In the posts of the control group, the light transmission was 95.33% in the coronal third, 80.66% in the middle third, and 41.33% in the apical third. Light transmission was significantly higher in the middle third of the posts of the experimental group when compared to the control group (p<0.05). The luminous transmittance of the posts of the experimental group was 97.4% with wavelengths of 400 nm, 97% at 450 and 500 nm, and 96.9% at 550 nm. In the posts of the control group, the luminous transmittance was 72.3% with wavelengths of 400 nm, 68.6% at 450 nm; 64.6% at 500 nm and 61.5% at 550 nm. The posts of the experimental group demonstrated significantly higher light transmittance than the control group (p<0.001).

Os pinos intra-articulares pré-fabricados reforçados com fibras têm ganhado popularidade devido a várias características favoráveis ao uso clínico em comparação com os pinos intra-radiculares metálicos). Objetivo: Avaliar a capacidade de transmissão de luz de dois tipos de pinos de fibra, usando dois métodos diferentes. Materiais e Método: Os pinos foram divididos em dois grupos: grupo experimental - pinos de fibra de vidro de quartzo e grupo controle - pinos de fibra de vidro. A transmitância de luz das amostras foi comparada por meio de teste de intensidade de luz por fotografias e espectrofotômetro ultravioleta-visível. Este teste foi analisado por terços: coronal, médio e apical. O espectrofotômetro testou a transmitância luminosa ao longo do comprimento do pino. A análise estatística foi realizada com nível de significância de 0,05. Resultados: A transmissão luminosa foi de 97% no terço coronal, 68% no terço médio e 27,66% no terço apical nos pinos do grupo experimental. Nos pinos do grupo controle, a transmissão de luz foi de 95,33% no terço coronal, 80,66% no terço médio e 41,33% no terço apical. A transmissão luminosa foi significativamente maior no terço médio dos pinos do grupo experimental quando comparado ao grupo controle (p<0,05). A transmitância luminosa dos pinos do grupo experimental foi de 97,4% com comprimento de onda de 400 nm, 97% em 450 e 500 nm e 96,9% em 550 nm. Nos postes do grupo controle, a transmitância luminosa foi de 72,3% com comprimento de onda de 400 nm, 68,6% em 450 nm; 64,6% a 500 nm e 61,5% a 550 nm. Os pinos do grupo experimental demonstraram transmitância de luz significativamente maior do que o grupo controle (p<0,001). Conclusão: a transmitância luminosa dos pinos de fibra de vidro de quartzo é maior do que pinos de fibra de vidro.

The luminous transmittance of the quartz-glass fiber posts is superior to glass fiber posts / Superioridade da transmitância luminosa dos pinos de fibra de quartzo

ABSTRACT Fiber-reinforced prefabricated intraarticular posts have gained popularity due to several favorable characteristics for clinical use compared to metallic intraradicular posts. Aim: To evaluate the light transmission capacity of two types of fiber posts, using two different methods. Materials and Method: The posts were divided into two groups: experimental group - quartz-glass fiber posts (n=10) and control group - glass fiber posts (n=10). The light transmittance of the samples was compared by means of light intensity test by photographs and ultraviolet-visible spectrophotometer. This test was analyzed by thirds: coronal, middle, and apical. The spectophotometer tested the luminous transmittance along the length of the post. The statistical analysis was conducted with a significance level of 0.05. Results: Light transmission was 97% on the coronal third, 68% in the middle third, and 27.66% in the apical third in the posts of the experimental group. In the posts of the control group, the light transmission was 95.33% in the coronal third, 80.66% in the middle third, and 41.33% in the apical third. Light transmission was significantly higher in the middle third of the posts of the experimental group when compared to the control group (p<0.05). The luminous transmittance of the posts of the experimental group was 97.4% with wavelengths of 400 nm, 97% at 450 and 500 nm, and 96.9% at 550 nm. In the posts of the control group, the luminous transmittance was 72.3% with wavelengths of 400 nm, 68.6% at 450 nm; 64.6% at 500 nm and 61.5% at 550 nm. The posts of the experimental group demonstrated significantly higher light transmittance than the control group (p<0.001). Conclusion: the luminous transmittance of quartz-glass fiber posts is higher than glass fiber posts.

RESUMO Os pinos intra-articulares pré-fabricados reforçados com fibras têm ganhado popularidade devido a várias características favoráveis ao uso clínico em comparação com os pinos intra-radiculares metálicos). Objetivo: Avaliar a capacidade de transmissão de luz de dois tipos de pinos de fibra, usando dois métodos diferentes. Materiais e Método: Os pinos foram divididos em dois grupos: grupo experimental - pinos de fibra de vidro de quartzo e grupo controle - pinos de fibra de vidro. A transmitância de luz das amostras foi comparada por meio de teste de intensidade de luz por fotografias e espectrofotômetro ultravioleta-visível. Este teste foi analisado por terços: coronal, médio e apical. O espectrofotômetro testou a transmitância luminosa ao longo do comprimento do pino. A análise estatística foi realizada com nível de significância de 0,05. Resultados: A transmissão luminosa foi de 97% no terço coronal, 68% no terço médio e 27,66% no terço apical nos pinos do grupo experimental. Nos pinos do grupo controle, a transmissão de luz foi de 95,33% no terço coronal, 80,66% no terço médio e 41,33% no terço apical. A transmissão luminosa foi significativamente maior no terço médio dos pinos do grupo experimental quando comparado ao grupo controle (p<0,05). A transmitância luminosa dos pinos do grupo experimental foi de 97,4% com comprimento de onda de 400 nm, 97% em 450 e 500 nm e 96,9% em 550 nm. Nos postes do grupo controle, a transmitância luminosa foi de 72,3% com comprimento de onda de 400 nm, 68,6% em 450 nm; 64,6% a 500 nm e 61,5% a 550 nm. Os pinos do grupo experimental demonstraram transmitância de luz significativamente maior do que o grupo controle (p<0,001). Conclusão: a transmitância luminosa dos pinos de fibra de vidro de quartzo é maior do que pinos de fibra de vidro.

Nutritional Status is Associated with Permanent Tooth Eruption in a Group of Brazilian School Children.

The present study aimed to investigate the association between nutritional status with delayed tooth eruption (DTE). Oral examination was performed in schoolchildren (8-11 years old), and DTE was defined by absence of dental gingival emergence or when primary tooth was still present in the oral cavity after the expected time. BMI z-score of each child were collected and nutritional status was defined. Chi-square test and binary logistic regression adjusted by age and gender were performed. Odds ratio (OR) and 95% Confidence Interval (95% CI) were calculated. The established alpha was 5%. Among 353 included children, 247 were classified as eutrophic, 16 as underweight, 64 as overweight, and 26 as obese. Underweight was associated as a risk factor to DTE (P = .014; OR = 3.5; 95% CI = 1.3-9.8), and underweight girls had more chance to present DTE than eutrophic girls (P = .048; OR = 4.4; 95% CI = 1.1-17.2) in chi square test. In logistic regression, underweight was associated as a risk factor to DTE (OR = 4.21; CI 95% = 1.42-12.43; P = .009). Underweight children have a higher risk of DTE in permanents.

Assessing the Association Between Nutritional Status, Caries, and Gingivitis in Schoolchildren: A Cross-Sectional Study.

Objective. To evaluate if nutritional status is associated with caries and gingivitis in Brazilian schoolchildren. Material and methods. Children of both genders, age ranging from 8 to 11 years old, were included in this study. Caries was diagnosed using ICDAS (International System for Detection and Assessment of Carious Lesions) and gingivitis was diagnosed using the Community Periodontal Index. The nutritional status of each child was defined by BMI Z-score calculation. Data on oral health behavior and dietary habit were collected through parent's questionnaires. Parametric analyzes were performed to compare the groups. The established alpha was 5%. Results. The sample consisted of 353 schoolchildren: 16 underweight children, 247 eutrophic children, 64 overweight children, and 26 were obese children. Overweight, Obese and Overweight + Obese children presented less cavitated caries lesion than Eutrophic children (P < .05). Gingivitis was not associated with nutritional status (P > .05). Conclusion. Caries was associated with overweight and obesity in Brazilian schoolchildren.