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
Keywords
Related Articles
- EP ID EP673518
- DOI -
- Views 146
- Downloads 0
EVALUATION OF ULTRASONOGRAPHIC AND ANTI-MÜLLERIAN HORMONE (AMH) CHANGES AS PREDICTORS FOR OVARIAN RESERVE AFTER LAPAROSCOPIC OVARIAN DRILLING VERSUS CONSERVATIVE TREATMENT FOR WOMEN WITH POLYCYSTIC OVARIAN SYNDROME
Background: Until recently, there was no international consensus either on the definition of PCOS or on what constitutes a polycystic ovary. At a recent consensus of The European Society of Human Reproductive and Embryol...
PRENATAL DIAGNOSIS AND OUTCOMES OF SEVERE HYDROTHORAX ASSOCIATED WITH COR TRIATRIATUM DEXTER AND CYTOMEGALOVIRUS INFECTION
Fetal hydrothorax (FH) or pleural effusion is a clinical entity, and refers to accumulation of fetal pleural fluid, which may presents a wide spectrum of severity ranging from small, harmless effusion, to life-threatenin...
ENDOSCOPY DIAGNOSIS AND FOLLOW UP OF TREATMENT OF EXPERIMENTAL GASTRIC ULCER IN DOGS
Diagnosis and treatment of dog’s gastrointestinal tract disorders have long been complicated. Endoscopy was used to examine the different grades of gastric ulcer in dogs experimentally and follow up response to acid supp...
TRENDS IN THE SEROPREVALENCE OF TRANSFUSION–TRANSMISSIBLE INFECTIONS (TTIS) AMONG POTENTIAL BLOOD DONORS IN A TERTIARY HEALTH FACILITY IN SOUTH–SOUTH NIGERIA
Background and Objectives Transfusion – transmissible infections still pose a formidable threat to blood transfusion safety in Sub-Saharan Africa owing to the endemicity of these infections in the region. Blood donors ca...
MACRO- AND MICROMORPHOLOGICAL STUDY OF DAUCUS CAPILLIFOLIUS GILLI CULTIVATED IN EGYPT
Macro- and micromorphological study of the leaf, stem, root, fruit and inflorescence of Daucus capillifolius Gilli was carried out with the aim of finding the characteristic features of these plant organs in both entire...