История создания концерна Toyota / Nissan
To properly prepare the margin of the cavity, consideration must be given to the elasticity of the material used for the restoration, the relation to the enamel prisms, and the aesthetic integration. For highly elastic micro-hybrid compounds (Young's modulus 4 Gpa), long bevels were used for aesthetic reasons. This type of preparation is not suitable for micro-hybrid formulations because they are more rigid (Young's modulus 15 Gpa) and the formulation limit would be too thin and could be dropped.
Moreover, in order to obtain a better resistance ratio between the composition boundary and the enamel prisms, long chamfers should be avoided.
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Toyota / Nissan: как создавались
A separate problem is the treatment of hypertension in patients with COVID-19. The presence of a history of hypertension in patients with COVID-19 was associated with a more severe course of infection, in contrast to patients who did not have hypertension. According to modern concepts, during the COVID-19 pandemic, patients with hypertension should carefully monitor their blood pressure levels and take constantly prescribed medications. This also applies to the use of so-called blockers of the renin-angiotensin system for the treatment of patients with hypertension: angiotensin-converting enzyme inhibitors and angiotensin II receptor blockers. A number of recent studies show that these groups of drugs not only do not increase the risk of infection with the virus, but also significantly improve the course of coronavirus disease.