RESUMEN
COVID 19, started as a respiratory illness has affected the human life world-wide. Mandatory guidelines for wearing of masks have been issued by WHO even if you are stepping out. The continuous wearing of masks for prolonged duration has led to some negative consequences. MATERIAL AND METHOD: A new method was introduced to increase the compliance of mask by using easily available orthodontic wires in the dental set up. RESULTS: The new approach was helpful in getting rid of rashes, irritation and erythematous patches behind the ears along with the reduction in the chances of cross contamination. CONCLUSION: This method can be incorporated in routine in the dental practice, even when one is not working on the patient.
RESUMEN
INTRODUCTION: The aim of this study was to evaluate the effects of a fixed functional appliance (Forsus Fatigue Resistant Device; 3M Unitek, Monrovia, Calif) on the mandible with 3-dimensional finite element stress analysis. METHODS: A 3-dimensional finite element model of the mandible was constructed from the images generated by cone-beam computed tomography of a patient undergoing fixed orthodontic treatment. The changes were studied with the finite element method, in the form of highest von Mises stress and maximum principal stress regions. RESULTS: More areas of stress were seen in the model of the mandible with the Forsus compared with the model of the mandible in the resting stage. CONCLUSIONS: This fixed functional appliance studied by finite element model analysis caused increases in the maximum principal stress and the von Mises stress in both the cortical bone and the condylar region of the mandible by more than 2 times.
Asunto(s)
Análisis de Elementos Finitos , Mandíbula/fisiopatología , Diseño de Aparato Ortodóncico , Aparatos Ortodóncicos Funcionales , Adolescente , Fenómenos Biomecánicos , Fuerza de la Mordida , Tomografía Computarizada de Haz Cónico/métodos , Femenino , Humanos , Procesamiento de Imagen Asistido por Computador/métodos , Imagenología Tridimensional/métodos , Maloclusión de Angle Clase III/terapia , Cóndilo Mandibular/fisiopatología , Músculo Masetero/fisiopatología , Modelos Biológicos , Contracción Muscular/fisiología , Músculos Pterigoideos/fisiopatología , Retrognatismo/terapia , Estrés Mecánico , Músculo Temporal/fisiopatología , Diente/fisiopatologíaRESUMEN
A Kunitz-type proteinase inhibitor has been purified from tamarind (Tamarindus indica) seeds. SDS-PAGE analysis of a purified sample showed a homogeneous band corresponding to a molecular weight of 21 kDa. The protein was identified as a Kunitz-type proteinase inhibitor based on N-terminal amino-acid sequence analysis. It was crystallized by the vapour-diffusion method using PEG 6000. The crystals belonged to the orthorhombic space group C222(1), with unit-cell parameters a = 37.2, b = 77.1, c = 129.1 A. Diffraction data were collected to a resolution of 2.7 A. Preliminary crystallographic analysis indicated the presence of one proteinase inhibitor molecule in the asymmetric unit, with a solvent content of 44%.