World Journal of Dentistry

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VOLUME 13 , ISSUE 5 ( September-October, 2022 ) > List of Articles

ORIGINAL RESEARCH

Chemical Characterization and Degree of Conversion of a Novel Denture Base Polymer Processed by a Novel Photon-thermal Dual Polymerization Technique

Ranganthan Ajay, Raaja Raajalakshmi, Natesan Devi, Kandasamy Balu, Veeramalai Devaki, Paramasivam Arunkumar

Keywords : Camphorquinone, Co-initiator, Copolymer, Denture base resin, Dual-cure

Citation Information : Ajay R, Raajalakshmi R, Devi N, Balu K, Devaki V, Arunkumar P. Chemical Characterization and Degree of Conversion of a Novel Denture Base Polymer Processed by a Novel Photon-thermal Dual Polymerization Technique. World J Dent 2022; 13 (5):513-519.

DOI: 10.5005/jp-journals-10015-2109

License: CC BY-NC 4.0

Published Online: 22-07-2022

Copyright Statement:  Copyright © 2022; The Author(s).


Abstract

Aims and objectives: The present research aimed to characterize the thermo-polymerized poly(methyl methacrylate) [TP-P(MMA)] with camphorquinone-2-(dimethylamino)ethyl methacrylate (CQ-DMAEMA) complex and to evaluate the degree of conversion (DC) of the formed novel copolymer P(MMA-co-DMAEMA). Materials and methods: The CQ was incorporated in the prepolymeric powder and the DMAEMA in the liquid monomer so that the CQ-DMAEMA ratio was 1:2. The CQ-DMAEMA complex concentration in the TP-P(MMA) was 5% (group B), 10% (group C), and 15% (group D). The TP-P(MMA) without the CQ-DMAEMA complex served as control (group A). Ten polymerized and unpolymerized specimens (n = 10 per group) were subjected to Fourier transform infrared spectroscopy (FTIR) using potassium bromide technique for assessing the copolymerization (CP) and DC. Results: New peaks ascribed to the methyl amino and tertiary amine groups were evident in all the trial groups which were absent in the control group. These peaks of the trial groups confirm the CP of the methacrylated amine with TP-P(MMA). Absence of the alkenyl C=C stretch peak in all the trial groups signifies higher DC than the control group. The TP-P(MMA) with 15% CQ-DMAEMA complex had the highest DC. Conclusion: The methacrylated amine successfully copolymerized with TP-P(MMA) which along with CQ formed a novel photon-thermal dual polymerized denture base copolymer P(MMA-co-DMAEMA) exhibiting higher DC than the conventional P(MMA). Clinical significance: The novel photon-thermal dual-polymerized denture base copolymer possessing good DC is expected to release meager or negligible amount of unreacted residual monomer and would possess palatable biocompatibility than the conventional P(MMA) without inducing denture-induced stomatitis in the edentulous geriatric population.


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  1. Ivković N, Božović D, Ristić S, et al. The residual monomer in dental acrylic resin and its adverse effects. Contemp Mater 2013;4(1):84–91. DOI: 10.7251/COMEN1301084I
  2. Anusavice KJ, Shen C, Rawls HR. Philip's Science of Dental Materials. 12th ed. Missouri: Elsevier-Saunders; 2013. 483 pp.
  3. Harrison A, Huggett R. Effect of the curing cycle on residual monomer levels of acrylic resin denture base polymers. J Dent 1992;20(6):370–374. DOI: 10.1016/0300-5712(92)90031-7
  4. Bettencourt AF, Neves CB, de Almeida MS, et al. Biodegradation of acrylic based resins: a review. Dent Mater 2010;26(5):e171–e180. DOI: 10.1016/j.dental.2010.01.006
  5. Santerre JP, Shajii L, Leung BW. Relation of dental composite formulations to their degradation and the release of hydrolyzed polymeric-resin-derived products. Crit Rev Oral Biol Med 2001;12(2):136–151. DOI: 10.1177/10454411010120020401
  6. Ferracane JL. Hygroscopic and hydrolytic effects in dental polymer networks. Dent Mater 2006;22(3):211–122. DOI: 10.1016/j.dental.2005.05.005
  7. Finer Y, Santerre JP. Salivary esterase activity and its association with the biodegradation of dental composites. J Dent Res 2004;83(1): 22–26. DOI: 10.1177/154405910408300105
  8. Lin BA, Jaffer F, Duff MD, et al. Identifying enzyme activities within human saliva which are relevant to dental resin composite biodegradation. Biomaterials 2005;26(20):4259–4264. DOI: 10.1016/j.biomaterials.2004.11.001
  9. Ajay R, Suma K, Asharaf Ali S. Monomer modifications of denture base acrylic resin: a systematic review and meta-analysis. J Pharm Bioallied Sci 2019;11(2):S112–S125. DOI: 10.4103/JPBS.JPBS_34_19
  10. Kamoun EA, Winkel A, Eisenburger M, et al. Carboxylated camphorquinone as visible-light photoinitiator for biomedical application: synthesis, characterization, and application. Arab J Chem 2016;9(5):745–754. DOI: 10.1016/j.arabjc.2014.03.008
  11. Yu Q, Nauman S, Santerre JP, et al. UV photopolymerization behavior of dimethacrylate oligomers with camphorquinone/amine initiator system. J Appl Polym Sci 2001;82(5):1107–1117. DOI: 10.1002/app.1945
  12. Maciel DDSA, Caires-Filho AB, Fernandez-Garcia M, et al. Effect of camphoroquinone concentration in physical–mechanical properties of experimental flowable resin composites. Biomed Res Int 2018:7921247. DOI: 10.1155/2018/7921247
  13. Al-Ali A, Kassab-Bashi TY. Fourier transform infrared (FTIR) spectroscopy of new copolymers of acrylic denture base materials. Int J Enhanced Res Sci Tech Eng 2015;4:172–180. Corpus ID: 13831816.
  14. Ajay R, Suma K, Sasikala R, et al. Chemical structure and physical properties of heat-cured poly(methyl methacrylate) resin processed with cycloaliphatic comonomer: an in vitro study. J Contemp Dent Pract 2020;21(3):285–290. DOI: 10.5005/jp-journals-10024-2769
  15. Stawski D, Nowak A. Thermal properties of poly(N,N-dimethylaminoethyl methacrylate). PLoS One 2019;14(6):e0217441. DOI: 10.1371/journal.pone.0217441
  16. Ajay R, Suma K, JayaKrishnakumar S, et al. Chemical characterization of denture base resin with a novel cycloaliphatic monomer. J Contemp Dent Pract 2019;20(8):940–946. DOI: 10.5005/jp-journals-10024-2634
  17. Ajay R, Rakshagan V, Sreevarun M, et al. Copolymerization of ring-opening oxaspiro comonomer with denture base acrylic resin by free radical/cationic hybrid polymerization. J Pharm Bioallied Sci 2021;13(1):S527–S531. DOI: 10.4103/jpbs.JPBS_582_20
  18. Rodriguez LS, Paleari AG, Giro G, et al. Chemical characterization and flexural strength of a denture base acrylic resin with monomer 2-tert-butylaminoethyl methacrylate. J Prosthodont 2013;22(4):292–297. DOI: 10.1111/j.1532-849X.2012.00942.x
  19. Spasojevic P, Zrilic M, Panic V, et al. The mechanical properties of a poly(methyl methacrylate) denture base material modified with dimethyl itaconate and di-n-butyl itaconate. Int J Polym Sci 2015;1–9. DOI: 10.1155/2015/561012
  20. Durner J, Obermaier J, Draenert M, et al. Correlation of the degree of conversion with the amount of elutable substances in nano-hybrid dental composites. Dent Mater 2012;28(11):1146–1153. DOI: 10.1016/j.dental.2012.08.006
  21. Bin Mahfooz AM, Alammari MR. The use of Fourier transform infra-red (FTIR) spectroscopic analysis and cell viability assay to assess pre-polymerized CAD/CAM acrylic resin denture base materials. Int J Pharm Res Allied Sci 2018;7(2):111–118.
  22. Miletic VJ, Santini A. Remaining unreacted methacrylate groups in resin-based composite with respect to sample preparation and storing conditions using micro-Raman spectroscopy. J Biomed Mater Res B Appl Biomater 2008;87(2):468–474. DOI: 10.1002/jbm.b.31128
  23. Ruyter IE, Svedsen SA. Remaining methacrylate groups in composite restorative materials. Acta Odontol Scand 1978;36(2):75–82. DOI: 10.3109/00016357809027569
  24. Musanje L, Ferracane JL, Sakaguchi RL. Determination of the optimal photoinitiator concentration in dental composites based on essential material properties. Dent Mater 2009;25(8):994–1000. DOI: 10.1016/j.dental.2009.02.010
  25. Taira M, Urabe H, Hirose T, et al. Analysis of photo-initiators in visible-light-cured dental composite resins. J Dent Res 1987;67(1):24–28. DOI: 10.1177/00220345880670010401
  26. Shintani H, Inoue T, Yamaki M. Analysis of camphorquinone in visible light-cured composite resins. Dent Mater 1985;1(4):124–126. DOI: 10.1016/s0109-5641(85)80002-6
  27. Fonseca Lima A, Salvador MVO, Dressano D, et al. Increased rates of photopolymerization by ternary type II photoinitiator systems in dental resins. J Mech Behav Biomed Mater 2019;98:71–78. DOI: 10.1016/j.jmbbm.2019.06.005
  28. Rueggeberg FA, Giannini M, Arrais CAG, et al. Light curing in dentistry and clinical implications: a literature review polymerization. Braz Oral Res 2017;31(suppl 1):e61. DOI: 10.1590/1807-3107BOR-2017.vol31.0061
  29. Almeida SM, Meereis CTW, Leal FB, et al. Evaluation of alternative photoinitiator systems in two-step self-etch adhesive systems. Dent Mater 2020;36(2):e29–e37. DOI: 10.1016/j.dental.2019.11.008
  30. Pratap B, Gupta RK, Bhardwaj B, et al. Resin based restorative dental materials: characteristics and future perspectives. Jpn Dent Sci Rev 2019;55(1):126–138. DOI: 10.1016/j.jdsr.2019.09.004
  31. Schroeder WF, Vallo CI. Effect of different photoinitiator systems on conversion profiles of a model unfilled light-cured resin. Dent Mater 2007;23(10):1313–1321. DOI: 10.1016/j.dental.2006.11.010
  32. Pereira SG, Fulgencio R, Nunes TG, et al. Effect of curing protocol on the polymerization of dual-cured resin cements. Dent Mater 2010;26(7):710–718. DOI: 10.1016/j.dental.2010.03.016
  33. Kang ES, Jeon YC, Jeong CM, et al. Effect of solution temperature on the mechanical properties of dual-cure resin cements. J Adv Prosthodont 2013;5(2):133–139. DOI: 10.4047/jap.2013.5.2.133
  34. Hoffman N, Papsthart G, Hugo B, et al. Comparison of photo–activation versus chemical or dual-curing of resin-based luting cements regarding flexural strength, modulus and surface hardness. J Oral Rehabil 2001;28(11):1022–1028. DOI: 10.1046/j.1365-2842.2001.00809.x
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