scholarly journals Comparative evaluation of the amount of the residual monomer in conventional and deep-frozen heat cure polymethylmethacrylate acrylic resin: An in vitro study

2018 ◽  
Vol 18 (2) ◽  
pp. 147 ◽  
Author(s):  
Neerja Mahajan ◽  
SonaliS Jadhav ◽  
Rajesh Sethuraman
Author(s):  
K Lekha ◽  
H Dharanendra Kumar

ABSTRACT Maxillofacial prosthetic materials either resin or elastomer used for the fabrication of facial prostheses have their own physical and mechanical properties. Maxillofacial prosthesis frequent replacement because the elastomer or acrylic resin and its pigments undergo color changes. Purpose Evaluate the effect of outdoor weathering on color stability of silicone and heat-cure acrylic with two different pigments. Materials and methods Total of 80 circular disk specimens, 40 silicone elastomer and 40 heat-cure clear acrylic resin were fabricated in the prepared mold and two dry earth pigments burnt sienna and cobalt blue was added to the specimens and it was subjected to simulated outdoor weathering. Before and after weathering, CIE values of both control and weathering groups were recorded by using spectrophotometer and tabulated. The obtained data were subjected to statistical analysis. Results Silicone elastomer with burnt sienna showed more color change when exposed to weathering followed by silicone with cobalt blue. Heat-cure with cobalt blue had shown some color change, heat-cure and burnt sienna were the most color stable. Conclusion From the study, it can be concluded that heat-cure acrylic resin with burnt sienna most color stable than silicone elastomer. How to cite this article Lekha K, Kumar HD, Meshramkar R, Nadiger RK. The Effect of Outdoor Weathering on Color Stability of Silicone and Acrylic Resin, Pigments-A Comparative Evaluation: An in vitro Study. Int J Prosthodont Restor Dent 2015;5(3):81-85.


2015 ◽  
Vol 4 (41) ◽  
pp. 7127-7133 ◽  
Author(s):  
Neha Ahuja ◽  
Pakhan A J ◽  
Godbole S R ◽  
Seema Sathe ◽  
Yashshree Sancheti

2013 ◽  
Vol 14 (3) ◽  
pp. 262-272 ◽  
Author(s):  
Sudipto Podder ◽  
Preeti Goel ◽  
Sunil Kar ◽  
Jayanta Bhattacharyya

Author(s):  
Preetica Sharma ◽  
Tarun Kalra ◽  
Manjit Kumar ◽  
Ajay Bansal ◽  
Shefali Singh Malik

Abstract Aim and Objective The main aim of this study was to evaluate the effect of three different types of pattern materials on the vertical marginal accuracy of complete cast crown. Material and Methods Three groups of 20 specimens each were made based on three pattern materials, that is, blue inlay wax, autopolymerizing acrylic resin, and light cure pattern resin. Castings were made and examined using stereo microscope for vertical marginal discrepancy. Results The result showed that the highest mean gap was noticed in the castings fabricated using inlay type B pattern wax followed by the castings fabricated using autopolymerizing resin and the least mean gap was observed in the castings fabricated using light cure modeling material. Conclusion It was concluded from this study that the use of light cure modeling material to make patterns for casting with lost wax technique is best recommended than inlay type B pattern and autopolymerizing resin.


2017 ◽  
Vol 4 (1) ◽  
pp. 9
Author(s):  
Ravikanth Anne ◽  
Gopinath Anne ◽  
NagarjunaPrasad Mukarla ◽  
Prakash Manne ◽  
SureshBabu Muvva ◽  
...  

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