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Balkan Journal of Stomatology
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2013, vol. 17, br. 2, str. 75-78
Effect of different light curing systems on surface hardness of composite resins
(naslov ne postoji na srpskom)
aYeditepe University, Faculty of Dentistry Department of Operative Dentistry Istanbul, Turkey
bUniversity of Kocaeli, Faculty of Dentistry, Department of Operative Dentistry Kocaeli, Turkey
cYeditepe University, Department of Basic Medical Sciences, Istanbul, Turkey

e-adresakagangokce@hotmail.com
Sažetak
(ne postoji na srpskom)
Aim: The purpose of this study was to evaluate the effect of different light curing systems on surface hardness of composites. Materials and Methods: Composite samples (2 mm thick, 6 mm in diameter, n=10) were prepared in a teflon mould using different light curing systems. Group 1: Hybrid composite samples Filtek Z250 (3M ESPE, St. Paul MN, USA) were polymerized with halogen light source (PolyLUX II, KaVo, Germany) for 20 seconds. Group 2: Hybrid composite Filtek Z250 samples were polymerized with halogen light source for 20 seconds, then additional polymerization was performed in Coltene D.I.-500 oven. Group 3: Composite samples Filtek Z250 were polymerized with LED light source (Elipar FreeLight 2, 3M ESPE, St. Paul MN, USA) for 20 seconds. Group 4: Composite samples Filtek Z250 were polymerized with LED light source for 20 seconds, then additional polymerization was performed in Coltene D.I.- 500 oven. Group 5: Tescera indirect composite samples were polymerized in Tescera ATL (Bisco, Inc. Schaumburg, IL, USA). The hardness test was performed using a digital microhardness tester (Buehler, Lake Bluff, Illinois, USA) with load of 500 g and dwell time of 15 seconds. The hardness was measured from the top and the bottom of the composite discs. Data were analyzed by using Student t-test, 1-WayANOVA and Tukey's tests (p<0.05). Results: The mean values and standard deviations were as follows: Group 1 (top = 66.50 ± 1.28; bottom = 64.81 ± 1.45); Group 2 (top = 68.06 ± 1.76; bottom = 66.71 ± 2.27); Group 3 (top = 69.80 ± 0.97; bottom = 67.01 ± 2.16); Group 4 (top = 69.85 ± 0.92; bottom = 68.05 ± 0.81); Group 5 (top = 71.05 ± 1.46; bottom = 71.33 ± 1.08). Conclusion: Tescera ATL system exhibited the highest microhardness values. The group in which halogen lamp and additional polymerization was used, showed significantly higher hardness values than the group in which only halogen lamp was used. However, additional polymerization did not affect the values when LED systems were used.
Reference
Alomari, Q.D., Mansour, Y.F. (2005) Effect of LED curing modes on cusp deflection and hardness of composite restorations. Operative dentistry, 30(6): 684-9
Alpöz, R.A., Ertugrul, F., Cogulu, D., Ak, A.T., Tanoglu, M., Kaya, E. (2008) Effects of light curing method and exposure time on mechanical properties of resin based dental materials. European journal of dentistry, 2(1): 37-42
Bayne, S.C., Heymann, H.O., Swift, E.J. (1994) Update on dental composite restorations. Journal of the American Dental Association, 125(6): 687-701
Bhamra, G.S., Fleming, G.J.P., Darvell, B.W. (2010) Influence of LED irradiance on flexural properties and Vickers hardness of resin-based composite materials. Dental Materials, 26(2): 148-155
Bouschlicher, M.R., Rueggeberg, F.A., Wilson, B.M. (2004) Correlation of bottom-to-top surface microhardness and conversion ratios for a variety of resin composite compositions. Operative dentistry, 29(6): 698-704
Chung, K.H., Greener, E.H. (1990) Correlation between degree of conversion, filler concentration and mechanical properties of posterior composite resins. J Oral Rehabil, 17(5): 487-94
Civelek, A., Ergeneli, S., Soyman, M., Sandalli, N. (2005) Effect of different light sources and modes on the depth of cure of composite resins. Balkan Journal of Stomatology, vol. 9, br. 3, str. 186-190
Davidson, C.L., Feilzer, A.J. (1997) Polymerization shrinkage and polymerization shrinkage stress in polymer-based restoratives. J Dent, 25(6): 435-40
Dewald, J.P., Ferracane, J.L. (1987) A comparison of four modes of evaluating depth of cure of light-activated composites. Journal of Dental Research, 66(3): 727-730
Eldiwany, M., Powers, J.M., George, L.A. (1993) Mechanical properties of direct and post-cured composites. American journal of dentistry, 6(5): 222-4
Feilzer, A.J., Dooren, L.H., Gee, A.J., Davidson, C.L. (1995) Influence of light intensity on polymerization shrinkage and integrity of restoration-cavity interface. European Journal of Oral Sciences, 103(5): 322-326
Ferracane, J.L., Condon, J.R. (1992) Post-cure heat treatments for composites: Properties and fractography. Dent Mater, 8(5): 290-5
Ferracane, J.L., Mitchem, J.C., Condon, J.R., Todd, R. (1997) Wear and marginal breakdown of composites with various degrees of cure. J Dent Res, 76(8): 1508-16
Halvorson, R.H., Erickson, R.L., Davidson, C.L. (2003) An energy conversion relationship predictive of conversion profiles and depth of cure for resin-based composite. Operative dentistry, 28(3): 307-14
Hofmann, N., Hugo, B., Klaiber, B. (2002) Effect of irradiation type (LED or QTH) on photo-activated composite shrinkage strain kinetics, temperature rise, and hardness. European Journal of Oral Sciences, 110(6): 471-479
Jandt, K.D., Mills, R.W., Blackwell, G.B., Ashworth, S.H. (2000) Depth of cure and compressive strength of dental composites cured with blue light emitting diodes (LEDs). Dent Mater, 16(1): 41-7
Knobloch, L.A., Kerby, R.E., Clelland, N., Lee, J. (2004) Hardness and degree of conversion of posterior packable composites. Operative dentistry, 29(6): 642-9
Kurachi, C., Tuboy, A.M., Magalhães, D.V., Bagnato, V.S. (2001) Hardness evaluation of a dental composite polymerized with experimental LED-based devices. Dental materials, 17(4): 309-15
McCabe, J.F., Kagi, S. (1991) Mechanical properties of a composite inlay material following post-curing. British dental journal, 171(8): 246-8
Mills, R.W., Jandt, K.D., Ashworth, S.H. (1999) Dental composite depth of cure with halogen and blue light emitting diode technology. British dental journal, 186(8): 388-91
Neo, B.J., Soh, M.S., Teo, J.W., Yap, A.U.J. (2005) Effectiveness of composite cure associated with different light-curing regimes. Operative dentistry, 30(6): 671-5
Peutzfeldt, A., Sahafi, A., Asmussen, E. (2000) Characterization of resin composites polymerized with plasma arc curing units. Dental materials, 16(5): 330-6
Piva, E., Correr-Sobrinho, L., Sinhoreti, M.A.C., Consani, S., Demarco, F.F., Powers, J.M. (2008) Influence of energy density of different light sources on Knoop hardness of a dual-cured resin cement. Journal of applied oral science, 16(3): 189-93
Pollington, S., Kahakachchi, N., van Noort, R. (2009) The influence of plastic light cure sheaths on the hardness of resin composite. Operative dentistry, 34(6): 741-5
Powers, J.M., Smith, L.T., Eldiwany, M., Ladd, G.D. (1993) Effects of post-curing on mechanical properties of a composite. American journal of dentistry, 6(5): 232-4
Quance, S.C., Shortall, A.C., Harrington, E., Lumley, P.J. (2001) Effect of exposure intensity and post-cure temperature storage on hardness of contemporary photo-activated composites. Journal of dentistry, 29(8): 553-60
Raptis, C.N., Fan, P.L., Powers, J.M. (1979) Properties of microfilled and visible light-cured composite resins. Journal of the American Dental Association, 99(4): 631-3
Reinhardt, J.W., Boyer, D.B., Stephens, N.H. (1994) Effects of secondary curing on indirect posterior composite resins. Operative dentistry, 19(6): 217-20
Sakaguchi, R.L., Sasik, C.T., Bunczak, M.A., Douglas, W.H. (1991) Strain gauge method for measuring polymerization contraction of composite restoratives. J Dent, 19(5): 312-6
Santos, M.J.M.C., Passos, S.P., da Encarnação, M.O.L., Santos, G.C., Bottino, M.A. (2010) Hardening of a dual-cure resin cement using QTH and LED curing units. Journal of applied oral science, 18(2): 110-5
Stahl, F., Ashworth, S.H., Jandt, K.D., Mills, R.W. (2000) Light-emitting diode (LED) polymerisation of dental composites: flexural properties and polymerisation potential. Biomaterials, 21(13): 1379-85
Stockton, L.W., Williams, P.T., Attallah, C. (2002) The effect of prolonged packing on the surface hardness of posterior composites. Operative dentistry, 27(3): 266-70
Uno, S., Asmussen, E. (1991) Marginal adaptation of a restorative resin polymerized at reduced rate. Scand J Dent Res, 99(5): 440-4
Unterbrink, G.L., Muessner, R. (1995) Influence of light intensity on two restorative systems. Journal of dentistry, 23(3): 183-9
Wendt, S.L. (1987) The effect of heat used as secondary cure upon the physical properties of three composite resins. II. Wear, hardness, and color stability. Quintessence international, 18(5): 351-6
Yap, A.U., Ng, S.C., Siow, K.S. (2001) Soft-start polymerization: influence on effectiveness of cure and post-gel shrinkage. Operative dentistry, 26(3): 260-6
Yap, A.U.J., Soh, M.S., Siow, K.S. (2002) Effectiveness of composite cure with pulse activation and soft-start polymerization. Operative dentistry, 27(1): 44-9
 

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jezik rada: engleski
vrsta rada: izvorni članak
objavljen u SCIndeksu: 24.09.2013.

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