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Nanotechnology is the study of materials, devices, and systems that display features that are distinct from those found in larger systems. It is no surprise that medical and dental researchers have taken notice of this rapid advancement in technology, which has piqued their curiosity about how it may be used to cure and prevent disease. It is a relatively new science that deals with the manipulation of matter at the molecular level, including the manipulation of individual molecules and their relationships. High-level control of position and chemical characteristics are the primary goals of this method. Nanotechnology has become one of the most promising and significant areas of scientific research as a result, thanks to an increased interest in interpreting matter's property at this dimension. Nanotechnology has been used in dentistry to produce new materials and procedures for diagnosing, preventing, treating, and regenerating periodontal disease, which is the subject of this article. Cargoes and materials such polymeric nanoparticles, non-porous nanogels, nanotube scaffold matrices, and nanofibers have shown promise effectiveness, and their functions in disease treatment are of significant interest. The purpose of this review paper is to offer thorough recent updates on the numerous nanotechnology-based methods to periodontal disease treatment.

A novel corona virus (now known as SARS-Cov-2) spill-over event, with its epicentre in Wuhan, People’s Republic of China, has emerged as a public health emergency of international concern. Corona virus represents a major group of viruses mostly affecting human beings through zoonotic transmission. The aim of this review article is to provide complete insight of all the precautionary measures to be followed for dental practices and hospitals in the areas that are potentially affected with COVID-19, strict and effective infection control protocols are urgently needed, so as to avoid the dental setups turning into hotspot for further spread of disease. In order to provide a comprehensive review, a thorough study of literature about novel corona virus, infection control, guidelines and precautionary measures in dental office were taken into consideration. This review is based on relevant guidelines and research, introduces essential knowledge about covid-19 and nosocomial infection in dental settings .All the latest literature of this context has been thoroughly studied, including the guidelines. The data pertaining to the statistic has been taken from the standard authorized organization, both worldwide and in India. Infection control measures are necessary to prevent the virus from further spreading and to help control the epidemic situation. Acumen is provided about the protocols to be followed in the dental set up, during the emergency treatment procedures in such infectious pandemic situation. This review summarizes the emerging evidence, which can guide the public health response, particularly in India.

Background: Literature have shown the microbiological and mechanical benefits gained from using platform switching. Also there is increasing need for intentional inclination of the implants in specific situations like those placed in the anterior maxilla. There are no studies that evaluate the bone behaviour when using abutments associated with the principle of platform switching in different angulations in anterior maxilla. The aim of the present study was to measure and compare the stress distribution on peri-implant bone when implants are placed in the anterior maxilla using 2 different abutments with different angulations and 2 different load conditions, by means of 3D-Finite Element Analysis (FEA) which might be a powerful and effective tool to visualize such a situation. Materials and Methods: Six mathematical models of implant-supported central incisor were created with varying abutment angulations: straight abutment (S1 and S2), angulated abutment at 15 degrees (A1 and A2) and angulated abutment at 20 degrees (A3 & A4), submitted to 2 loading conditions (146 N): S1, A1 and A3 oblique loading (45 degrees) and S2, A2 and A4 axial loading, parallel to the long axis of the implant. Maximum (Rmax) and minimum (Rmin) principal stress values were obtained for cortical and trabecular bone. Results: All models showed higher stress on the peri-implant bone when subjected to oblique loading. For the cortical bone, the maximum principal stress (σ max) was highest in A1(45.53) followed by S1(34.82), A2(30.31), A3(24.85), S2(19.69) MPa and the least being in A4(16.57). For the trabecular bone, the σ max was highest in S1(8.75), followed by A1(12.12), S1(8.75), A2(7.12), A3(6.18), A4(4.12), and in S2(3.28) being the least. Conclusion: Implants demonstrated increased maximum principal stress in oblique loading compared to axial loading in all the models. Maximum von Mises stress was increased with increase in the angulation of abutment, highest being in 200 and least being in straight implant abutment. Overall, Maximum principal stresses were seen well within the yield strength of cortical and trabecular bone.