Analysis in vitro of strength degradation comparing latex and non-latex elastics
Keywords:Elastomer. Tensile strenght. Latex. Silicone elastomers.
AbstractAim: This study was conducted in order to evaluate and compare the behavior of latex and non-latex elastics, as the loss of strength over time in vitro. Methods: The study evaluated 15 of each elastic material for the pre-selected times: 0, 1, 3, 12 and 24 hours. The rubber bands were transferred to the testing machine (EMIC DL-500 MF). The force values were recorded after stretching the elastic to a length of 25mm. Independent t-test was applied. Analysis of variance (ANOVA) was used to check the variation of the forces generated between those determined times. To identify between which times the difference was present, Tukey post-hoc test was accomplished. Results: As regards the initial forces (zero time), the values of force for non-latex elastic were slightly higher than the latex elastic. In subsequent times, the forces generated by the latex elastic showed higher values. Regarding the material degradation, at the end of 24 hours the highest percentage was observed for non-latex elastic. Conclusion: The latex elastic had a more stable behavior during the studied period compared with non-latex.
Haddad MF, Goiato MF, Santos DF, Crepaldi N de M, Pesqueira AA, Bannwart LC. Bond strength between acrylic resin and maxillofacial silicone. J Appl Oral Sci. 2012 Nov-Dec;20(6):649-54.
Filié-Haddad MF, Coelho Goiato M, Micheline dos Santos D, Moreno A, Filipe D’Almeida N, Alves Pesqueira A. Color stability of maxillofacial silicone with nanoparticle pigment and opacifier submitted to disinfection and artificial aging. J Biomed Opt. 2011 Sep;16(9):095004. doi: 10.1117/1.3625401.
Kiat-Amnuay S, Beerbower M, Powers JM, Paravina RD. Influence of pigments and opacifiers on color stability of silicone maxillofacial elastomer. J Dent. 2009;37 Suppl 1:e45-50. doi: 10.1016/j.jdent.2009.05.004.
Goiato MC, Haddad MF, Santos, DM, Pesqueira AA, Moreno A. Hardness evaluation of prosthetic silicones containing opacifiers following chemical disinfection and accelerated aging. Braz Oral Res. 2010 Jul-Sep;24(3):303-8.
Guiotti AM, Goiato MC, Dos Santos DM, Vechiato-Filho AJ, Cunha BG, Paulini MB, et al. Comparison of conventional and plant-extract disinfectant solutions on the hardness and color stability of a maxillofacial elastomer after artificial aging. J Prosthet Dent. 2016 Apr;115(4):501-8. doi: 10.1016/j.prosdent.2015.09.009.
Griniari P, Polyzois G, Papadopoulos T. Color and structural changes of a maxillofacial elastomer: the effects of accelerated hotoaging, disinfection and type of pigments. J Appl Biomater Funct Mater. 2015 Jul 4;13(2):e87-91. doi: 10.5301/jabfm.5000229.
Eleni PN, Krokida MK, Polyzois GL, Gettleman L. Effect of different disinfecting procedures on the hardness and color stability of two maxillofacialelastomers over time. J Appl Oral Sci. 2013;21(3):278-83. doi: 10.1590/1679-775720130112.
Pesqueira AA, Goiato MC, Dos Santos DM, Haddad MF, Moreno A. Effect of disinfection and accelerated ageing on dimensional stability and detail reproduction of a facial silicone with nanoparticles. J Med Eng Technol. 2012 May;36(4):217-21. doi: 10.3109/03091902.2012.666321.
Goiato MC, Haddad MF, Pesqueira AA, Moreno A, dos Santos DM, Bannwart LC. Effect of chemical disinfection and accelerated aging on color stability of maxillofacial silicone with opacifiers. J Prosthodont. 2011 Oct;20(7):566-9. doi: 10.1111/j.1532-849X.2011.00755.x.
Mancuso DN, Goiato MC, Dos Santos DM. Color stability after accelerated aging of two silicones, pigmented or not, for use in facial prostheses. Braz Oral Res. 2009 Apr-Jun;23(2):144-8.
dos Santos DM, Goiato MC, Sinhoreti MA, Fernandes AU, Ribeiro PP, Dekon SF. Color stability of polymers for facial prosthesis. J Craniofac Surg. 2010 Jan;21(1):54-8. doi: 10.1097/SCS.0b013e3181c3b58e.
Yu R, Koran AII, Craig RG. Physical properties of a pigmented silicone maxillofacial materials as a function of accelerated aging. J Dent Res. 1980 Jul;59(7):1141-8.
Mancuso DN, Goiato MC, Dekon SFC. Visual evaluation of color stability after accelerated aging of pigmented and nonpigmented silicones to be used in facial prostheses. Indian J Dent Res. 2009 Jan-Mar;20(1):77-80.
Goiato MC, Haddad MF, Sinhoreti MA, dos Santos DM, Pesqueira AA, Moreno A. Influence of opacifiers on dimensional stability and detail reproduction of maxillofacial silicone elastomer. Biomed Eng Online. 2010 Dec 16;9:85. doi: 10.1186/1475-925X-9-85.
Kelly KL, Judd DB. U.S. Department of Commerce. Color Universal language and dictionary of names. National Bureau of Standards; 1976 Dec [access 2018 Feb 20]. 184p. NBS Special Publication 440. Available from: https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nbsspecialpublication440.pdf.
Goiato MC, Pesqueira AA, Dos Santos DM, Zavanelli AC, Ribeiro P do P. Color stability comparison of silicone facial prostheses following disinfection. J Prosthodont. 2009 Apr;18(3):242-4. doi: 10.1111/j.1532-849X.2008.00411.x.
Siddiquey IA. The effects of organic surface treatment by methacryloxyprophyltrimethoxysilane on the photostability of TIO2. Mat Chem Physics. 2007;105(2-3):162-8. doi: 10.1016/j.matchemphys.2007.04.017.
Pinel SR, Fairhurst D, Gillies R, Mitchnick MA, Kollias N. Microfine zinc oxide is a superior ingredient to microfine titanium dioxide. Dermatol Surg. 2000 Apr;26(4):309-14.
Robinson JG, McCabe JF, Storer R. The whitening of acrylic dentures: the role of denture cleansers. Br Dent J. 1985 Oct 19;159(8):247-50.
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