INFLUENCE OF DIFFERENT METHODS OF PIGMENT INCORPORATION ON CHROMATIC STABILITY OF FACIAL ELASTOMER
Journal Title: European Journal of Pharmaceutical and Medical Research - Year 2019, Vol 6, Issue 6
Abstract
Statement of the Problem: Color alteration, which generally occurs due to the degradation and pigmentation of the prosthesis, is one of the principal factors related to limitations of treatments with facial prostheses. Objective: Evaluate two incorporation methods of pigment mixtures and the influence on the color stability of MDX4-4210 elastomers, as well as qualitatively evaluate the dispersion of the pigment by means of a scanning electron micros-copy (SEM) associ-ated with an energy dispersive spectrometer (EDS). Materials and Methods: Twenty-two facial elastomer specimens were fabricated and distributed in two groups: conventional laboratory incorporation and mechanical incorporation. Twenty specimens were submitted to a chromatic stability reading (ΔE and L*, a*, and b* coordinates) and two speci-mens were submitted to the SEM/EDS. Tests were performed before and after the accelerated aging for 1008 hours. The color alteration (ΔE) data were submitted to Student’s t-test (α=.05). Data for the L*, a*, and b*coordinates were submitted to the two-way repeated measures variance analysis (ANO-VA) and the Tukey test (α=.05). The qualitative data from SEM and EDS were compared visually. Results: The results demonstrated that there was a decrease in the L* coordinate value in the conventional incorporation method after the accelerated aging (p=.002), while there was an increase in the mechanical method (p<.001). For the a* (p<.001) and b* (p<.001) coordinate values, a decrease of val-ues occurred for both methods of incorporation after aging. Conclusions: The incorporation methods of the pigment mixture with silicone interfered in the L*, a*, and b* coordinates. However, the chromatic stability (ΔE) of the material was similar for both incorporation methods.
Authors and Affiliations
Marcelo Coelho Goiato
STUDY OF PROTECTIVE EFFECTS OF PISTACIALENTISCUS LEAVES AQUEOUS EXTRACT AGAINST GASTRIC ULCER AND RENAL STONE FORMATION IN RATS
Medicinal plants have been used by all societies since ancient times as medicines for the treatment of many diseases. In Morocco, the use of medicinal plants is an important part of the cultural diversity of population....
MONITORING OF THYROID HORMONES LEVELS IN DIABETIC MELLITUS TYPE 2 PATIENTS CONTROLLED AND UNCONTROLLED IN SANA’A, YEMEN
Background: Diabetes mellitus (DM) is a common endocrine metabolic disorder and variety of thyroid abnormalities may coexist and interact with DM that appears to influence thyroid function. Objective: Therefore, the stud...
PHYTOCHEMICAL SCREENING AND PROXIMATE ANALYSIS OF ROOT OF CURCUMA LONGA LINN.
Study on the evaluation of nutritional quality as well as phytochemical screening of poorly utilized plant products is of immense importance. This research work was aimed at screening the phytochemicals in different solv...
SUNLIGHT EXPOSURE AND SERUM VITAMIN D STATUS AMONG COMMUNITY DWELLING HEALTHY WOMEN IN SRI LANKA
Introduction: Hypovitaminosis D is prevalent and linked with a multitude of co-morbidities. The high prevalence of hypovitaminosis D, despite the availability of sunlight throughout the year has raised many questions. Ob...
LYCOPENE AND ATHEROGENIC RISK FACTORS: A REVIEW
Coronary heart disease is marked as the third–fourth largest global deaths worldwide by addressing the attributes of high increase hazard ratios across multiple variables: Hypertension, Dyslipidemia, Elevated cholesterol...