World Journal of Dentistry

Register      Login

VOLUME 11 , ISSUE 1 ( January-February, 2020 ) > List of Articles

ORIGINAL RESEARCH

Comparison of Adaptation of Acrylic Resin Cured by Injection Molded Technique or Microwave Energy: An In Vitro Study

Sumit S Phukela, Puja Malhotra, Gaurav Setya, Bhupinder Yadav, Reshu Madan, Pankaj Ritwal

Keywords : Adaptation accuracy, Denture base, Injection moulding techniques, Microwaveable acrylic resin

Citation Information : Phukela SS, Malhotra P, Setya G, Yadav B, Madan R, Ritwal P. Comparison of Adaptation of Acrylic Resin Cured by Injection Molded Technique or Microwave Energy: An In Vitro Study. World J Dent 2020; 11 (1):24-29.

DOI: 10.5005/jp-journals-10015-1690

License: CC BY-NC 4.0

Published Online: 01-02-2020

Copyright Statement:  Copyright © 2020; The Author(s).


Abstract

Aims and objective: The drawback of poly-methyl-methacrylate (PMMA) is the absence of adaptation accuracy in acrylic resin affected by polymerization shrinkage and resin flask method. The present study was conducted to compare adaptation of acrylic resin cured by injection moulded technique and microwave energy. Materials and methods: 40 standardized maxillary record bases (2 mm thick) were processed from 40 maxillary master casts. SR-Ivocap High Impact Resin was used for injection moulding technique and microwaveable acrylic resin (Onda-Cryl, Artigos Odontológicos, Clássico Ltd, Sao-Paulo, SP, Brazil) was cured by microwave energy (320 W for 3 minutes + 0 W for 3 minutes + 720 W for 3 minutes). These specimens were divided into two groups. Group I: 20 maxillary record bases were fabricated using injection moulding technique. Group II: 20 maxillary record bases were fabricated using microwave energy (320 W for 3 minutes + 0 W for 3 minutes + 720 W for 3 minutes). The base/cast sets were sliced transversally in the posterior palatal seal zone. The gap between the resin base and casts was evaluated at the right marginal limit, left marginal limit, right ridge crest, left ridge crest and the palatal midline. The adaptation accuracy was examined utilizing a stereomicroscope. Results: There was a significant difference between the microwaveable acrylic resin (Onda-Cryl) cured by microwave energy (320 W for 3 minutes + 0 W for 3 minutes + 720 W for 3 minutes) and the SR-Ivocap high impact resin cured by injection moulding technique. Conclusion: The microwaveable acrylic resin (Onda-Cryl) cured by microwave energy (320 W for 3 minutes + 0 W for 3 minutes + 720 W for 3 minutes) showed fewer adaptation inaccuracies and more accurate denture base than injection moulding techniques. Clinical significance: The microwaveable acrylic resin (Onda-Cryl) cured by microwave energy (320 W for 3 minutes + 0 W for 3 minutes + 720 W for 3 minutes) have more accurate denture bases when differentiated to those polymerized by injection moulding techniques. Therefore microwaveable acrylic resin (Onda-Cryl) cured by microwave energy (320 W for 3 minutes + 0 W for 3 minutes + 720 W for 3 minutes) can be a viable option for fabrication of dentures.


HTML PDF Share
  1. Gharechahi J, Asadzadeh N, Shahabian F, et al. Flexural strength of acrylic resin denture bases processed by two different methods. J Dent Rest Dent Clin Dent Prospects 2014;8(3):148–152. DOI: 10.5681/joddd 2014.027.
  2. Babu MR, Rao CS, Ahmed ST, et al. Comparative evaluation of the dimensional accuracy of heat polymerized PMMMA denture bases cured by different curing cycles and clamped by R S Technique and conventional method-an in vitro study. J Int Oral Health 2014;6(2): 68–75.
  3. Gharechahi J, Asadzadeh N, Shahabian F, et al. Dimensional changes of acrylic resin denture bases;conventional versus injection moulded technique. J Dent Tehran 2014;11(4):398–405.
  4. Nejatian T, Sefat F, Johnson T. Impact of packing and processing technique on mechanical properties of acrylic denture base materials. Materials 2015;8(5):2093–2109. DOI: 10.3390/ma8052093.
  5. Babosa DB, Desouza RF, Pero AC, et al. Flexural strength of acrylic resin polymerized by different cycles. J Appl Oral Sci 2007;15(5):424–428. DOI: 10.1590/S1678-77572007000500010.
  6. Arafa KAO. Effects of different denture base materials and changed mouth temperature on dimensional stability of complete dentures. Int J Dent 2016;2016:7085063. DOI: 10.1155/2016/7085063.
  7. Pavan S, Filho JNA, Santos PHD, et al. Effect of microwave treatment on dimensional accuracy of maxillary acrylic resin denture bases. Braz Dent J 2005;16(2):1–6. DOI: 10.1590/S0103-64402005000200006.
  8. Tuna EB, Rohlig BG, Sancakli E, et al. Influence of acrylic resin polymerization methods on residual monomer release. J Contemp Dent Prac 2013;14(2):259–264. DOI: 10.5005/jp-journals-10024-1310.
  9. Jackson AD, Lang BR, Wang RF. The influence of teeth on denture base processing accuracy. Int J Prosthodont 1993;6(4):333–340.
  10. Flex G, Ferneda F, Ferreida daSilva DF, et al. Effect of two microwave disinfection protocols on adaptation of poly methyl metha acrylate denture bases. Minerva Stomatol 2007;56(3):121–127.
  11. Badr NA, Ibrahim AM, Mohamed GF. Effects of curing mode on the clinical performance and properties of acrylic resin overdenture bases. Cario Dental Journal 2008;24(2):259–271.
  12. Badr NA, Ibrahim AM, Mohamed GF. Effects of curing mode on the clinical performance and properties of acrylic resin overdenture bases. Cario Dent J 2008;24(2):259–271.
  13. Firtell DN, Green AJ, Elahi JM. Posterior peripheral seal distortion related to processing temperature. J Prosthet Dent 1981;45(6): 598–601. DOI: 10.1016/0022-3913(81)90418-2.
  14. Moussa ARA, Zaki DYI, Gabry HSE, et al. Comparative adaptation accuracy of heat cured and injection moulded resin denture base materials. J Appl Sci Res 2012;8(8):4691–4696.
  15. Makul N, Rattanadecho P, Agrawal DK. Application of microwave energy in cement and concrete – a review. Renew Sust Energ Rev 2014;37:715–733. DOI: 10.1016/j.rser.2014.05.054.
  16. Barsoum WM, Eder J, Asgar K. Evaluating the accuracy of fit of aluminium–cast denture bases and acrylic resin bases with a surface meter. J Am Dent Assoc 1968;76(1):82–88. DOI: 10.14219/jada. archive.1968.0031.
  17. Johnson DL, Duncanson MG. The plastic postpalatal denture seal. Quintessence Int 1987;18:457–462.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.