Tensile strength evaluation of acrylic after ozonated water and microwave disinfection.
AbstractBackground: There is a need for safe disinfection methods without a detrimental effect on the acrylic denture base. Aim: the purpose of the current study was to evaluate the effect of ozonated water and two protocols of microwave disinfection on tensile bond strength of high-impact acrylic. Material and methods: Eighty samples were divided into four major groups: one control and three experimental groups, 20 specimens each. The experimental groups each received either disinfection by ozonated water, microwave 850W/1min, or microwave 650W/6min. Further division of the major groups into two sub-groups depending on the number of disinfection cycles and total immersion time in distilled water: One cycle and one day versus seven cycles and seven days. The control group specimens were immersed in distilled water without any disinfection for either one day or seven days. Tensile strength testing was performed on the specimens from the eight groups. The data were analyzed by SPSS version 21#. The ANOVA and Tukey-HSD multiple comparison tests were used for comparison for groups. Results: A non-significant difference in the tensile strength was observed in the groups subjected to one cycle of ozone or microwave disinfection at 850W/1min. There was a significant decrease in tensile strength for the specimens subjected to one cycle of 650W/6min microwaving. The number of testing cycles and storage time in distilled water had a significant impact on the tensile strength of the acrylic in all tested groups, by decreasing it. Conclusion: Ozone disinfection and microwaving at 850W for one minute did not affect the tensile strength of the acrylic, but repeated disinfection over seven days at one cycle per day impaired the tensile strength of the acrylic resin.
2. Fortes CBB, Collares FM, Leitune VCB, Schiroky PR, Rodrigues SB, Samuel SMW, Petzhold CL, Stefani V. Effect of disinfection techniques on physical-mechanical properties of a microwave-activated acrylic resin. Polímeros 2018;28(3):215-9.
3. Gajwani-Jain S, Magdum D, Karagir A, Pharane P. Denture cleansers: A review. IOSR-JDMS. 2015;14(2):94-6.
4. Gama MC, de Oliveira DG, da Silva PM, Ordinola-Zapata R, Duarte MH, Porto VC. Antifungal activity of 4% chlorhexidine and 2% sodium hypochlorite against Candida albicans biofilms. Gen Dent. 2015;63(5):43-7.
5. Brondani MA, Siqueira AR. A critical review of protocols for conventional microwave oven use for denture disinfection. Community Dent Health. 2018.
6. Fortes CB, Leitune VC, Collares FM, Dornelles Junior NB, Rodrigues SB, SAMUEL SW, Petzhold CL, Stefani V. Acrylic resin disinfection by peracetic acid and microwave energy. Rev Gaúch Odontol. 2015;63(3):315-8.
7. Konchada J, Karthigeyan S, Ali SA, R V, Amirisetty R, Dani A. Effect of simulated microwave disinfection on the mechanical properties of three different types of denture base resins. J Clin Diagn Res. 2013;7(12):3051-3.
8. Silva MM, Vergani CE, Giampaolo ET, Neppelenbroek KH, Spolidorio DM, Machado AL. Effectiveness of microwave irradiation on the disinfection of complete dentures. Int J Prosthodont. 2006;19(3):288-93.
9. Kabra R, Rodrigues SJ, Pai U, Shenoy R, Shetty TB, Hegde P, Mahesh M, Saldanha S. Evaluation of chemical disinfection and microwave irradiation on denture base materials: An in vitro study. Indian J Dent Res. 2020; 31:282-90.
10. Ahuja N, Pakhan AJ, Godbole SR, Sathe S, Sancheti Y. To evaluate the effect of microwave disinfection on the hardness of heat cure and self-cure acrylic resin: An in vitro study. J Evol Med Dent Sci. 2015;4:7127–33.
11. Seo RS, Vergani CE, Pavarina AC, Compagnoni MA, Machado AL. Influence of microwave disinfection on the dimensional stability of intact and relined acrylic resin denture bases. J Prosthet Dent. 2007;98(3):216-23.
12. Aslanimehr M, Mojarad N, Ranjbar S, Aalaei S. In vitro comparison of the effects of microwave irradiation and chemical and mechanical methods on the disinfection of complete dentures contaminated with Candida albicans. Dent Res J. 2018;15(5):340-346.
13. Senna PM, da Silva WJ, Del Bel Cury AA. Denture disinfection by microwave energy: influence of Candida albicans biofilm. Gerodontology 2012;29(2):e186-91.
14. Shafeeq SM, Karthikeyan S, Reddy SM, Karthigeyan S, Manikandan R, Thangavelu A. Cumulative effect of microwave sterilization on the physical properties of microwave polymerized and conventional heat-polymerized acrylic resin. J Pharm Bioallied Sci. 2016;8(Suppl 1):S100-S104.
15. Tiwari S, Avinash A, Katiyar S, Iyer AA, Jain S. Dental applications of ozone therapy: A review of literature. Saudi J Dent Res. 2017; 8, 105–111
16. Eregowda NI, Poornima P. Ozone in dentistry. Indian J Dent Adv. 2015;7(1):36-41.
17. Arita M, Nagayoshi M, Fukuizumi T, Okinaga T, Masumi S, Morikawa M, Kakinoki Y, Nishihara T. Microbicidal efficacy of ozonated water against Candida albicans adhering to acrylic denture plates. Oral Microbiol Immunol. 2005;20(4):206-10.
18. Nakhaei M, Mirmortazavi A, Ghanbari M, Ahmadi Z. Effect of Ozone and Two Common Denture Cleaners on Tensile Bond Strength and Surface Hardness of a Silicone Soft Liner. Frontiers in Dentistry. 2019;16(5):351-6.
19. ASTM : American society for testing and material, ASTM D, 638-m standard test method for tensile properties of plastics. Philadelphia: American National Standards Institute. 1986.
20. ADA. specification No.12 for denture base polymer guide to dental materials and devices. 7th Ed. Chicago, Illinois.1999.
21. Mohammed AA, Ismail IJ. In Vitro Performance of Polymethyl-Methacrylate with Ultra High Density Poly Ethylene Fiber and Nano Zirconium Oxide Particles Composite. J Baghdad Coll Dent. 2018;30(1):5-11.
22. Ekren O, Ozkomur A. Influence of ozone and paracetic acid disinfection on adhesion of resilient liners to acrylic resin. J Adv Prosthodont. 2016;8(4):290-5.
23. Mohammed D, Mudhaffar M. Effect of modified zirconium oxide nano-fillers addition on some properties of heat cure acrylic denture base material. J Baghdad Coll Dent. 2012;24(4):1-7.
24. Balasubramanian I, Maheswaran R. Technical Report. Effect of inclusion of SiC particulates on the mechanical resistance behaviour of stir-cast AA6063/SiC composites. Materials & Design. 2015;65:511-20.
25. Dovigo LN, Pavarina AC, Ribeiro DG, de Oliveira JA, Vergani CE, Machado AL. Microwave disinfection of complete dentures contaminated in vitro with selected bacteria. J Prosthodont. 2009;18(7):611-7.
26. Lombardo CE, Canevarolo SV, Reis JM, Machado AL, Pavarina AC, Giampaolo ET, Vergani CE. Effect of microwave irradiation and water storage on the viscoelastic properties of denture base and reline acrylic resins. J Mech Behav Biomed Mater. 2012;5(1):53-61.
27. Hamouda IM, Ahmed SA. Effect of microwave disinfection on mechanical properties of denture base acrylic resin. J Mech Behav Biomed Mater. 2010; 3(7):480-7.
28. Senna PM, Jose Da Silva W, Faot F, Antoninha Del Bel Cury A. Microwave disinfection: cumulative effect of different power levels on physical properties of denture base resins. J Prosthodont. 2011;20(8):606-12.
29. Consani RL, Azevedo DD, Mesquita MF, Mendes WB, Saquy PC. Effect of repeated disinfections by microwave energy on the physical and mechanical properties of denture base acrylic resins. Braz Dent J. 2009;20(2):132-7.
30. Raiyani CM, Arora R, Bhayya., Deepak P. Ozone(Dentistry towards the greenery)-A Review. Int J Biomed Res. 2015;6(03): 155-159.
31. Ahmed J, Binnal A, Rajan B, Denny C, Shenoy N. Ozone applications in dentistry: an overview. J Exp Integr Med. 2013;3(3):171-176.
32. Feng D, Gong H, Zhang J, Guo X, Yan M, Zhu S. Effects of antibacterial coating on monomer exudation and the mechanical properties of denture base resins. The Journal of prosthetic dentistry 2017;117(1):171-177.
The copyright of all the articles published in the J Oral Res. belongs to the Universidad de Concepción, Chile. All information about theJ Oral Res. is licensed under Creative Commons Attribution License 3.0 and must be cited correctly.