Does radiation therapy affect adhesion of tricalcium silicate cements to root dentin?

Objective: This study aimed to analyze the effect of irradiation on the push-out bond strength of mineral trioxide aggregate (MTA) and Biodentine to radicular dentin. Methodology: A total of 60 extracted mature human teeth with single root canals were categorized into two groups (irradiated and non-irradiated) (n=30). Each group was further divided into two sub-groups based on cements used (Biodentine and MTA). Then, a cumulative radiation dose of 60 Gy was divided into 30 fractions (two Gy for every fraction) and administered for five successive days per week over six weeks. Obturation was then performed using MTA and Biodentine. Afterwards, 1.5 mm thick horizontal sections were procured from the middle one-third of all the specimens and then subjected to push-out bond test. Results were analyzed using one-way analysis of variance with post-hoc Tukey’s test. Results: The bond strength of Biodentine and MTA to irradiated teeth was lower than non-irradiated teeth. Highest push-out bond strength was observed in non-irradiated specimens filled with Biodentine (p=0), followed by irradiated specimens filled with Biodentine (p=0); non-irradiated specimens filled with MTA (p=0); and irradiated specimens filled with MTA (p=0.9). Conclusion: The push-out bond strength of Biodentine and MTA to root canal dentin decreased significantly post irradiation

Does radiation therapy affect adhesion of tricalcium silicate cements to root dentin?

Abstract Objective This study aimed to analyze the effect of irradiation on the push-out bond strength of mineral trioxide aggregate (MTA) and Biodentine to radicular dentin. Methodology A total of 60 extracted mature human teeth with single root canals were categorized into two groups (irradiated and non-irradiated) (n=30). Each group was further divided into two sub-groups based on cements used (Biodentine and MTA). Then, a cumulative radiation dose of 60 Gy was divided into 30 fractions (two Gy for every fraction) and administered for five successive days per week over six weeks. Obturation was then performed using MTA and Biodentine. Afterwards, 1.5 mm thick horizontal sections were procured from the middle one-third of all the specimens and then subjected to push-out bond test. Results were analyzed using one-way analysis of variance with post-hoc Tukey’s test. Results The bond strength of Biodentine and MTA to irradiated teeth was lower than non-irradiated teeth. Highest push-out bond strength was observed in non-irradiated specimens filled with Biodentine (p=0), followed by irradiated specimens filled with Biodentine (p=0); non-irradiated specimens filled with MTA (p=0); and irradiated specimens filled with MTA (p=0.9). Conclusion The push-out bond strength of Biodentine and MTA to root canal dentin decreased significantly post irradiation

A Study to Assess the Barriers And Facilitators of Blood Donation Among University Students Of South India

Introduction: Donated blood is very crucial and life-saving for those who require large volumes of blood in any medical emergency. Many blood donation camps are routinely organized to fill this void of demand and supply. In a university campus associated with a hospital, it is important that student volunteers should contribute towards the increase in demand for blood during times of crisis. This makes it imperative to understand their perception of this noble cause. Methods: A descriptive cross-sectional study was conducted among 354 volunteers of a university campus using convenience sampling. The primary outcome was to assess the factors that influence voluntary blood donation among the volunteers. The adjusted association was performed using logistic regression. R Console was used for statistical analysis. Odds ratios and p-value < 0.05 with 95% confidence intervals were calculated to determine the level of significance. Results: A total of 354 responses were received and analysed. Among these, 38.98%, (n=138) participants had donated blood at least once. Factors that were significantly associated with blood donation were gender, being a member of an NGO, frequency of volunteering activities, fear of needles, and belief that they would acquire the disease during blood donation. Conclusion: The majority of the participants had good knowledge of blood donation, but their attitude and practice did not fall along the same lines. The study also highlighted that attitude towards donating blood is high among the participants who are associated with the NGOs or participate in voluntary activities. Voluntary work induces a ‘sense of giving something to the society which appears to be facilitating factor and an effective measure to encourage blood donation among youth