Bisphenol A or BPA-based epoxy resins are widely used in the manufacture of commercial products, including dental resins, polycarbonate plastics, and the inner coating of food cans. BPA is a precursor to the resin monomer Bis-GMA. During the manufacturing process of Bis-GMA dental sealants, Bisphenol A (BPA) might be present as an impurity or as a degradation product of Bis-DMA through esterases present in saliva. Leaching of these monomers from resins can occur during the initial setting period and in conjunction with fluid sorption and desorption over time and this chemical leach from dental sealants may be bioactive. Researchers found an estrogenic effect with BPA, Bis-DMA, and Bis-GMA because BPA lacks structural specificity as a natural ligand to the estrogen receptor. It generated considerable concern regarding the safety of dental resin materials. This review focuses on the BPA in dental sealants and its estrogen-like effect.
Aim and objective To compare the effectiveness of erbium:yttrium–aluminum–garnet laser, GentleWave irradiation, photodynamic therapy (PDT), and sodium hypochlorite in smear layer removal and dentin permeability with a scanning electron microscope (SEM). Materials and methods Seventy-five recently extracted single-rooted teeth (maxillary second premolars) were randomly divided into 5 groups of 15 each. Group I teeth was the control group in which conventional root canal preparation (RCP) [17% ethylenediaminetetraacetic acid (EDTA)] was done without laser irradiation, group II teeth underwent RCP and GentleWave™ treatment, group III teeth were subjected to Er:YAG laser irradiation, group IV uses low-level 660 nm (PDT), and group V samples were irrigated with 5.25% NaOCl. All samples were viewed under the SEM. Images at the coronal, middle, and apical part of the root canal were obtained at ×1000. A scoring system for smear layer removal and debris removal scoring was used for analysis. Results Smear layer removal was significantly higher at different points (coronal, middle, and apical area) in group I, followed by V, IV, II, and group III in declining order (p < 0.05). Intercomparison between the groups at different points indicates a significant difference in smear layer removal score between group I and group V at coronal, middle, and apical third. The result was not significant at coronal third and middle third, between group I and V, II and III, II and IV. The result was not significant at apical third between I and V, II and III, and II and IV (p < 0.05). Ethylenediaminetetraacetic acid and sodium hypochlorite are effective in smear layer removal followed by the Er-YAG laser technique. Conclusion Ethylenediaminetetraacetic acid and NaOCl are effective in smear layer removal. Er:YAG laser-activated RCP was comparatively efficient in cleaning the smear layer and opening dentinal tubules. Clinical significance Er:YAG laser-activated RCP was comparatively efficient in cleaning the smear layer and it can be used for effective removal of smear layer for clinical usage. How to cite this article Dash S, Ismail PMS, Singh J, et al. Assessment of Effectiveness of Erbium:Yttrium–Aluminum–Garnet Laser, GentleWave Irradiation, Photodynamic Therapy, and Sodium Hypochlorite in Smear Layer Removal. J Contemp Dent Pract 2020;21(11):1266–1269.
The disfigurement associated with the loss of an eye can cause significant physical and emotional problems. This article describes the rehabilitation of an orbital defect with a silicone prosthesis, wherein retention has been achieved by a combination of anatomic undercut, adhesives and eyeglasses.
Facial disfigurement due to trauma is very common as the face is a prominent part of the body and is susceptible to injuries. A protocol for the diagnosis and intervention for psychological problems of trauma patients should be implemented in the Indian hospitals as they lack policies for assessing the mental status of such patients. This study was conducted to analyze and determine the psychological implications and need for mental health services of maxillofacial trauma patients. Fifty patients with maxillofacial trauma above 18 years of age were included in this study. The assessment was done using the Hospital Anxiety and Depression Scale (HADS) and Trauma Screening Questionnaire (TSQ), which are considered as the standard tools for assessment of psychological disorders post-trauma. We observed psychological stress in 84% of the patients at the baseline, which reduced to 24% after one month at the first follow-up visit and further reduced to 22% at the second follow-up visit. The reduction in the percentage from the first to the second follow-up visit was less significant. However, the change in HADS and TSQ scores was found to be significant, suggesting that the intensity of trauma decreases with the time-lapse. Anxiety, depression, and post-traumatic stress are prevalent in patients with maxillofacial trauma, which may lead to impaired day-to-day life. Our results suggest that there is a need for psychological care in patients with maxillofacial trauma.
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