Aa Soleimani, Z Bahrololumi, M Kabudan, M Mousavi Nasab , A Abarghooyi,
Volume 20, Issue 4 (Sep-Oct 2012)
Abstract
Introduction: Contamination of etched enamel to saliva before placement of sealant prevents the appropriate bonding and results in microleakage. Using bondings is effective for decreasing the microleakage. This experimental study aimed to evaluate the effect of bonding agent on microleakage of a fissure sealant before or after contamination to saliva.
Methods: In this experimental study 40 sound premolar teeth were randomly divided into four groups. The prophylaxis was done and the teeth were etched with 37% phosphoric acid gel, then they were washed and dried. In the first group, Seal-Rite fissure sealant and Dentastic (Pulpdent, USA) without saliva contamination, and in the second group sealant with bonding agent after saliva contamination for 10s, were applied and cured for 40s. In the third group, fissure sealant without bonding agent or saliva contamination, and in the fourth group fissure sealant without bonding application was applied after contamination with saliva and then was cured. After thermocycling, the teeth were placed in 50% silver nitrate for 2 hours. The buccolingual sections were applied and microleakage evaluation was made by stereomicroscope at 4X magnifications and results were evaluated with mann-whiteny test.
Results: The fissure sealant group without bonding agent showed the most microleakage after contamination to saliva and use of sealant with bonding agent significantly showed decrease of microleakage.
Conclusion: Use of bonding agent under fissure sealant in saliva-contamination status is beneficial for decreasing microleakage.
Shabnam Olumi, Amir Hossein Fathabadi, Hosein Azimian, Samaneh Mostafapour, Sara Khademi,
Volume 30, Issue 7 (10-2022)
Abstract
Introduction: The undeniable role of medical imaging in the diagnosis and treatment of diseases shows the importance of protection against ionizing radiation used in these methods. Therefore, the aim of the present study is investigating the necessity of increasing patients' awareness of ionizing radiation in minimizing the dose received.
Methods: The present study was a cross-sectional analytical study with 159 research-made questionnaires, including demographic information and questions about the level of awareness of patients regarding the dangers of ionizing radiation and protection against these radiations, were completed by the patients referring to the radiology departments of Mashhad University of Medical Sciences in 2019. Data analysis was done using t-test and one-way analysis of variance under SPSS 16 software.
Results: The mean knowledge score of the patients was 35.36% ± 26.07%. Moreover, 91/1% of them stated in their answers that they would like physicians to explain the benefits and risks of these radiations, while only 35.2% of patients were informed by their physicians.
Conclusion: According to the results of the completed questionnaires, a low percentage of the patients answered the specialized questions correctly, and according to the individuals' statements, 91/2% stated that they would like to receive information in this regard. Therefore, the need to provide appropriate training to the patients in this field, through the preparation of training brochures, and attracting staff cooperation, to inform patients referring to radiology departments about the risks should be a priority.
