The effect of UDMA and Bis-GMA irradiation period on residual monomers in resin packable composite
Downloads
Background: Residual monomers are non-polymerized monomers which can cause clinical harm, for example inflammation, to oral cavity tissue while the remaining monomers can potentially be carcinogenic. The more residual monomers that remain due to an imperfect polymerization processes, the lower the compressive strength level and the higher the number of micro slits that can cause secondary caries and tooth sensitivity. Urethane dimethacrylate (UDMA) and bisphenol A glycol dimethacrylate (Bis-GMA) constitute two of the resins most frequently used in packable composites. During the short irradiaton period forming part of the polymerization process, UDMA and Bis-GMA have the potential to produce residual monomers. Purpose: This study aimed to compare the number of residual monomers in packable composite resin following irradiation lasting 1x20 seconds and 2x20 seconds. Methods: 28 samples of cylindrical packable composite with a thickness of 2 mm and a diameter of 5 mm were divided into four groups. Groups 1 and 2 were irradiated for 1x20 seconds, and groups 3 and 4 for 2x20 seconds with the composite subsequently being immersed in ethanol solution for 24 hours. The number of residual monomers using high-performance liquid chromatography (HPLC) devices was calculated and the results statistically analyzed using a Mann-Whitney Test. Results: Repeated irradiation had no effect on the amount of residual monomers in packable composite resins. However, there were differences in the number of residual monomers in the material contained in packable composite resins Bis-GMA and UDMA, while the remaining monomers in UDMA outnumbered those in Bis-GMA. Conclusion: The number of residual monomers in Bis-GMA is lower than in the remaining UDMA after 1x20 seconds irradiation, while the number of residual monomers in Bis-GMA and UDMA following 2x20 seconds irradiation was no different to that after irradiation of 1x20 seconds duration.
Downloads
Putriyanti F, Herda E, Soufyan A. Pengaruh saliva buatan terhadap diametral tensile strength micro fine hybrid resin composite yang direndam dalam minuman isotonic. J PDGI. 2012; 61: 43–7.
Soetojo A. Penggunaan resin komposit dalam bidang konservasi gigi. Surabaya: Revka Petra Media; 2013. p. 23–112.
Sakaguchi RL, Powers JM. Craig’s restorative dental materials. 13th ed. Missouri: Elsevier Mosby; 2012. p. 161–98.
Nurhapsari A. Perbandingan kebocoran tepi antara restorasi resin komposit tipe bulk-fill dan tipe packable dengan penggunaan sistem adhesif total etch dan self etch. ODONTO Dent J. 2016; 3: 8–13.
Scotti N, Venturello A, Borga FAC, Pasqualini D, Paolino DS, Geobaldo F, Berutti E. Post-curing conversion kinetics as functions of the irradiation time and increment thickness. J Appl Oral Sci. 2013; 21(2): 190–5.
Santini A, Gallegos IT, Felix CM. Photoinitiators in dentistry: a review. Prim Dent J. 2013; 2(4): 30–3.
Anusavice KJ, Phillips RW, Shen C, Rawls HR. Phillips’ science of dental materials. 12th ed. Philadelphia: Saunders; 2012. p. 63–5.
Karabela MM, Sideridou ID. Synthesis and study of properties of dental resin composites with different nanosilica particles size. Dent Mater. 2011; 27(8): 825–35.
Karina E, Riolina A, Krisnawan N. Pengaruh lama penyinaran resin komposit nanofil packable terhadap kekuatan tekan (compressive strength) bahan restorasi. J Ilmiah Fakultas Kedokteran Gigi Univ Muhammadiyah Surakarta. 2014; 1: 3–8.
Aryanto M, Armilia M, Aripin D. Compressive strength resin komposit hybrid post curing dengan light emitting diode menggunakan tiga ukuran lightbox yang berbeda. Dent J (Maj Ked Gigi). 2013; 46(2): 101–6.
Ubaldini ALM, Baesso ML, Sehn E, Sato F, Benetti AR, Pascotto RC. Fourier transform infrared photoacoustic spectroscopy study of physicochemical interaction between human dentin and etch-&-rinse adhesives in a simulated moist bond technique. J Biomed Opt. 2012; 17(6): 1–5.
Kamoun EA, Menzel H. Crosslinking behavior of dextran modified with hydroxyethyl methacrylate upon irradiation with visible light - Effect of concentration, coinitiator type, and solvent. J Appl Polym Sci. 2010; 117(6): 3128–38.
Papakonstantinou AE, Eliades T, Cellesi F, Watts DC, Silikas N. Evaluation of UDMA’s potential as a substitute for Bis-GMA in orthodontic adhesives. Dent Mater. 2013; 29(8): 898–905.
Cornelio RB, Wikant A, Mjøsund H, Kopperud HM, Haasum J, Gedde UW, Örtengren UT. The influence of bis-EMA vs bis GMA on the degree of conversion and water susceptibility of experimental composite materials. Acta Odontol Scand. 2014; 72(6): 440–7.
- Every manuscript submitted to must observe the policy and terms set by the Dental Journal (Majalah Kedokteran Gigi).
- Publication rights to manuscript content published by the Dental Journal (Majalah Kedokteran Gigi) is owned by the journal with the consent and approval of the author(s) concerned.
- Full texts of electronically published manuscripts can be accessed free of charge and used according to the license shown below.
- The Dental Journal (Majalah Kedokteran Gigi) is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License
