Ioan Cristescu

Ioan Cristescu


Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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7 January 2020 in Materials
Verified
Journal Article
Open access
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Antoniac IulianAntoniac Iulian
Antoniac Iulian
Florin MiculescuFlorin Miculescu
Florin Miculescu
Cosmin Mihai CotrutCosmin Mihai Cotrut
Cosmin Mihai Cotrut
Anton FICAIAnton FICAI
Anton FICAI
Julietta V. RauJulietta V. Rau
Julietta V. Rau
ICIoan Cristescu
Ioan Cristescu
Magnesium alloys as bioresorbable materials with good biocompatibility have raised a growing interest in the past years in temporary implant manufacturing, as they offer a steady resorption rate and optimal healing in the body. Magnesium exhibits tensile strength properties similar to those of natural bone, which determines its application in load-bearing mechanical medical devices. In this paper, we investigated the biodegradation rate of Mg-Zn-Mn biodegradable alloys (ZMX410 and ZM21) before and after coating them with hydroxyapatite (HAP) via the electrophoretic deposition method. The experimental samples were subjected to corrosion tests to observe the effect of HAP deposition on corrosion resistance and, implicitly, the rate of biodegradation of these in simulated environments. X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) provided detailed information on the quality, structure, and morphology of the HAP coating. The obtained results demonstrate that coating of Mg-Zn-Mn alloys by HAP led to the improvement of corrosion resistance in simulated environments, and that the HAP coating could be used in order to control the biodegradation rate.

31 August 2020 in Industria Textila
Verified
Journal Article
Closed access
Corina SporeaCorina Sporea
Corina Sporea
MFMargareta-Stela Florescu
Margareta-Stela Florescu
DFDumitru Ferechide
Dumitru Ferechide
ICIoan Cristescu
Ioan Cristescu
The recent studies report an increase in the percentage of newborns diagnosed with cerebral palsy (CP) in industrialized countries due to the increased survival rate of infants with low birth weight. The assessment of the upper limb motor function and manual skills are important steps in achieving a suitable multi-modal therapeutical plan, aiming at gaining functional independence and early integration into society. The study seeks to identify how the motor deficiency present at the level of the upper limbs influences the manual skills of CP patients reflected in daily activities (Activities of Daily Living – ADL) and using medical textiles. 35 patients diagnosed with CP were assessed during hospitalization using, for the comparative reflection of ADL dexterity assessment results, at the same patient, quantified, the Action Research Arm Test (ARAT) scale and ABILHAND-Kids. A highly significant correlation was found, the ABILHAND-Kids score being moderately correlated with the ARAT score, obtained in the upper limb with more deficient functionality (0.578) and respectively with better functionality (0.570). The assessment of the child suffering of CP, using the ABILHAND-Kids questionnaire and the ARAT test provides to the rehabilitation team useful information, with the benefit of complementarity for the elaboration, based on several correlated elements, of the case management plan and methodology. Proper treatment, instituted early, can have a favorable influence on the social integration of these people. A remarkable contribution has been made by the textile domain which, through its sustained concerns regarding the research and development of biotechnologies and biomaterials, proves its permanent concern in supporting and integrating these people.