Profiling Method of Side Mill for Threading Screw for Dental Implants

Berbinschi, Silviu; Baroiu, Nicușor; Teodor, Virgil; Oancea, Nicolae

doi:10.4028/www.scientific.net/amr.837.22

Cited by 6 publications

(4 citation statements)

References 3 publications

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“…The results of the study were surprising in the sense that people without depressive, anxious or obsessivecompulsive disorder showed a greater increase in symptoms during the COVID-19 pandemic, while people with prepandemic psychiatric impairment tended to have a mild decrease in symptoms. This conclusion draws attention to the need to establish global measures to prevent and monitor psychiatric alarm symptoms that may impact the prognosis and quality of life of all individuals (Berbinschi et al, 2014;Pan et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Assessment of Depression in Patients with COVID-19

Baroiu

Dumea

Năstase

et al. 2021

BRAIN

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The COVID-19 pandemic is probably the greatest natural disaster of our generation and the 21st century with a great impact on mental health. The present study aims to quantify, with the help of the Beck questionnaire, the degree of depression in a group of 109 patients with moderate forms of COVID-19, hospitalized in the Second Clinic of the Clinical Hospital for Infectious Diseases St. Cuv. Parascheva Galati during the period: 1.01-30.03.2021. Of these, 35 patients (32.11%) had varying degrees of depression, and had an age and body mass index statistically significantly higher than those without depression. These patients also had statistically significantly higher Charlson scores of cumulative comorbidities and required longer hospitalization than patients without depression. The severity of COVID-19 and the percentage of favorable prognosis did not show statistically significant differences between the two groups. Our study reveals a lower incidence of depression among patients with COVID-19 compared to existing studies in the literature. This can be explained by the fact that our study is conducted at the end of the first year of the pandemic when antiviral therapy schemes stabilized and population vaccination began. The high genetic variability of the virus, which can determine at any time the appearance of new strains with greater aggression, contagion or with mutations on the spike protein, maintains the need to keep non-specific preventive measures and the mental tension related to this pathology. Thus, intrapandemic psychiatric disorders remain a major public health problem and require strong government prevention and control measures.

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Section: Discussionmentioning

confidence: 99%

Assessment of Depression in Patients with COVID-19

Baroiu

Dumea

Năstase

et al. 2021

BRAIN

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“…The production of free radicals in the skin cells, under UV conditions, is a prompt event immediately after UV irradiation ( 66 ). Thus, it is suggested that oxidative stress that increases all known destructive aspects of the skin can be counterbalanced by the antioxidant effect of melatonin, in the presence of optimal intracellular concentrations at the time of UV exposure ( 57 , 60 , 67 , 68 ). Collectively, these mechanisms suggest a significant UV damage protection mechanism for melatonin.…”

Section: Melatonin and Uv Protectionmentioning

confidence: 99%

Benefits and adverse events of melatonin use in the elderly (Review)

et al. 2022

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“…The problem of surface description may be solved using measuring machines which allow a rigorous determining of the axial section of the rotor and, so, the knowledge about discrete form of the helical surface as a coordinate array [5].…”

Section: Generating Tools Profilingmentioning

confidence: 99%

Side Mill Tool Profiling for Generation of Helical Surfaces Determined by Reverse Engineering

Popa

Teodor

Baroiu

et al. 2014

AMM

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The compressor rotors usually are helical surfaces with constant pitch and are composed crossing profiles. Frequently, for repair operations occurs the reconstruction necessity for one or both of the worms, drive and driven, from the helical compressors gear. The helical composed surface of rotor flank is generated usually with side mill. The knowledge of worm shape can not be made from geometrical conditions. In these conditions it is necessary to determine the flank form by actual measuring the crossing profiles of these parts. So, the theoretical helical surface of the worm is being substituted by an assembly of helical lines which together with crossing profiles forms points cloud resulted from measuring leads to a polyhedral expression of the flank rotor. Numerically, this surface type is expressed by a coordinate array which shows its discrete image. The profiling of cutting tool bounded by a revolution surface reciprocally enveloping with the substitutive surface of the helical one represents a special problem. In this paper is proposed an algorithm for polyhedral expression of the helical surface previously determined by reverse engineering methods and an algorithm for the determination of the specific enveloping condition at contact with a discrete surface.It is presented an example for a compressor rotor measured on a 3D measuring machine, the algorithm for the transformation of the gathered points cloud in a surface with polyhedral expression. Given these conditions there were determined the enveloping condition and the axial section of the side mill.

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Profiling Method of Side Mill for Threading Screw for Dental Implants

Cited by 6 publications

References 3 publications

Assessment of Depression in Patients with COVID-19

Assessment of Depression in Patients with COVID-19

Benefits and adverse events of melatonin use in the elderly (Review)

Side Mill Tool Profiling for Generation of Helical Surfaces Determined by Reverse Engineering

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