Comparison of Surface Hardness of Various Shades of Twinky Star Colored Compomer Light-cured with QTH and LED Units
Keywords:
Colored compomer, Surface hardness, QTH, LEDAbstract
Introduction: Colored compomers are a group of restorative materials that were introduced in 2002 to repair primary teeth, and they provide attractive color and ease of use in pediatric dentistry. The aim of this study was to evaluate the effect of QTH and LED light-curing units on the surface hardness of different colors of Twinky Star compomers.
Methods: In this experimental study, a composite resin (Z250, 3M, and USA), an ionosit compomer (DMG, Germany) with A3 shade and 8 different Twinky Star colored compomer (Voco, Germany) samples were used. In all, 100 samples were prepared with 10 samples in each group, i.e., 10 Z250 composite resin, 10 ionosit compomers, and 10 Twinky Star compomer samples of each color. The samples were prepared in a 4×4-mm Teflon mold. Half of the samples were light-cured with QTH and the other half with LED units. Then, the surface microhardness was measured by Vickers hardness test. The data were analyzed with IBM-SPSS version 22, using the t-test and ANOVA.
Results: Two-way ANOVA showed that the mean surface hardness of the compomer samples cured with the QTH unit was significantly higher than that cured with the LED unit (p < 0.001). In each curing unit, surface hardness of some materials exhibited significant differences with the highest hardness being observed in the Z250 composite resin (650.35 ± 56.320) and the lowest hardness being detected in the ionosit compomers (461.10 ± 96.170). One-way ANOVA also showed that, among the different colors of the Twinky Star compomer, the lowest hardness with both units (QTH and LED) was observed in the gold color (214.32 ± 22.026 and 175.116 ± 15.918, respectively).
Conclusion: The colored compomer and the type of light-curing unit affected the microhardnesses of the surfaces. Different colors of Twinky Star compomers exhibited different surface microhardnesses.
References
Kramer N, Lohbauer U, Garcia Godoy F, Frankenberger R. Light curing of resin-based composites in the
LED era. Am J Dent. 2008; 21(3): 135-42. PMID: 18686762.
Rode KM, Freitas PM, Lioret PR, PowellL G, Turbino ML. Microhardness evaluation of a microhybrid
composite resin light cured with halogen light, light emitting diode and argon ion laser. Lasers Med Sci.
; 24(1): 87-92. doi: 10.1007/s10103-007-0527-x, PMID: 18058187.
Rahiotis C, Kakaboura A, Loukidis M, Vougiouklakis G. Curing efficiency of various types of light curing
units. Eur j oral sci. 2004; 112(1): 89-94. doi: 10.1111/j.0909-8836.2004.00092.x, PMID: 22053242.
Aravamudhan K, Floydc J, Rakowwski D, Flam G, Dickens SH, Eichmiller FC, et al. Light_emitting diode
curing light irradiance and polymerization of resin based composite. J Am Dent Assoc. 2006; 137(2): 213- 23. PMID: 16521388.
Mail P, Deshpand S, Single A. Microleakage of restorative materials: an in vitro study. J Indian
Socpedoprev Dent. 2006; 24(1): 15-8. doi: 10.4103/0970-4388.22828, PMID: 26379377.
Hwang SW, Kwon TY, Kim KH, Lee JB. optical, mechanical and chemical properties of colored
compomer. Biomaterial Research. 2007; 11(1): 36-42.
Jafari Z, Javadinejad SH, Mirzakochaki P. Evaluation of colored compomer micro-hardness with different
colors in various time curing. Shahed. Journals System. 2015; 22(115): 17-24.
Harold O. Heymen N. Edward J, Swift Jr. Andren. Ritter. Stadevant`s Art and Science of Operative
Dentistry, 6th ed, 2013: 216-228.
Summitt JB, Robbins JW, Hitton TJ, Schwartz RS. Fundamentals of Operative Dentistry. 3th ed. USA:
Quintessence Publishing; 2006.
Heymann HO, Swift Jr EJ, Ritter AV. Art and Science of Operative Dentistry. 6th ed. St Louis: Mosby;
218-222
Summitty B, Robbins JW, Hitton TJ, Schwerts Rs, Fundamental of operative dentistry. 3th ed. USA:
Quintessence Publishing Co; 2006: 183-339.
Esmaeili B, Safarcherati H, Vaesi V. Hardness evaluation of composite resins cured whit QTH and LED. J
Dent Res Dent Clin Dent Prospects. 2014; 8(1): 40-4. doi: 10.5681/joddd.2014.007
Castro A, Feigal RE. Microleakage of a new improved glass ionomer restorative material in primary and
permanent teeth. Pediatr Dent. 2002; 24(1): 8-23. PMID: 11874054.
Polydorou O, Manolakis A, Hellwing E, Hahn P. Evaluation of the curing depth of two translucent
composite materials using a halogen and two LED curing units. Clin Oral Invest. 2008; 12(1): 45-51. doi:
1007/s00784-007-0142-z, PMID: 17960434.
Mowafyo EL, Badrawy W, Wasef M, Omar H. Kermanshahi S. Efficacy of New LED light- curing unites
in hardening of class composite Restorations. J can Dent Assoce. 2007; 73(3): 253. PMID: 17439711.
Coballos L, Fuentes MV, Tafalla H, Martinez A, floores J, Rodriguez J. Curing effectiveness of resin
composites at different exposure times using LED and halogen units. Med Oral Patol Oral Cir Bucal. 2009;
(1): 51-60. PMID: 19114957.
Correr AB, Sinhoreti MAC, Sobrinho LC, Lango RN, Schnerider LF, Eonsani S. Effect of the increase of
energy dentistry on Knoop hardness of dental composites light-cured by conventional QTH, LED and
xenon plasma Arc. Braz Dent Journal. 2005; 16(3): 218-24. doi: 10.1590/S0103-64402005000300009.
Price RB, felix CA. Effect of delivering light in specific narrow band widths from 394 to 515 nm on the
micro-hardness of resin composites. Dent Mater. 2009; 25(7): 899-908. PMID: 19243817. doi:
1016/j.dental.2009.01.098.
Polydorou O, Manolakis A, Hellwing E, Hahn P. Evaluation of the curing depth of two translucent
composite materials using a halogen and two LED curing unites. Clin Oral Invest. 2008; 12(1): 45-51. doi:
1016/j.dental.2009.01.098. PMID: 17960434.
Yazici AR. Kugel G, Gul G. the Knoop hardness of a composite resin polymerized with different curing
lights and different modes. J Contemp Dent Practice. 2007; 8(2): 502-9. PMID: 17277827.
Tak O, Altintes SH, Ozturk N, Usumez A. Effect of three types of light curing units on 5 year colour
changes of light-curing composite. Clin Oral Invest. 2009; 13: 29-35. PMID: 18769947. doi:
1007/s00784-008-0221-9.
Cerveria GP, Bertholed TB, Souto A, Spohr AM, Merchioro EM. Degree of conversion and hardness of an
orthodontic resin cured with a light- curing diode and a quartz- tungsten- halogen light. Furopean Journal of
Orthodontics. 2010; 32: 83-6. doi: 10.1093/ejo/cjp048, PMID: 19726490.
Kramer N, Lobauer U, Gercie-Goday F, frank on berger R. light curing of resin-based composits in the
LED era. Am j Dent. 2008; 21(3): 135-42. PMID: 18686762.
Vandenbulcke JD, Marks LA, Martens LC, Verbeek RM. Comparison of curing depth of a colored
polyacid-modified composite resin whit different light-curing units. Quintessence Int. 2010; 41(9): 787-94.
PMID: 20806104.
Didem Atabak, Haluk bodur. Conversion degrees of a colored compomer in different colors utilized by
various curing times. J Dent Child. 2011; 78(13): 83-7. PMID: 22041112.
Uhl A, Mills RW, Jandt KD. Photoinitiator dependent composite depth of cure and Knoop hardness whit
halogen and LED light curing units. Biomateials. 2003; 24: 1787-95. doi: 10.1016/S0142-9612(02)00532- X, PMID: 12593961.
Safarcherati H, Alaghehmand H. Comparative evaluation of hardness dental composite polymerized with
LED and Halogen Light Curing units. J of Dentistry Babol University of Medical Science. 2008; 1(1):24-9.
Esmaeili B, Vaezi Asil A. A comparative study of the amount of polymerized composites with LED and
QTH light curing units. PHD thesis. Dental Faculty of Medical University of Babol. 2011-2012.
Okte Z, Villalta P, Garcia-Godoy F, Garcia-Godoy F Jr, Murray P. Effect of curing time and light curing
systems on the surface hardness of compomers. Oper Dent. 2005; 30(4): 540-5. PMID: 16130877.
Polydorou O, Manolakis A, Hellwig E, Hahn P. Evaluation of the curing depth of two translucent
composite materials using a halogen and two LED curing units. Clin Oral Investig. 2008; 12(1): 45-51. doi:
1007/s00784-007-0142-z.
Alaghehmand H, Zarenezhad N. Comparison of in-depth hardness of composites cured with LED and QTH
units. PHD thesis. Dental Faculty of Medical University of Babol.2012-2013. [In Persian]
Price RBT, Fahey J, Felix CM. Knoop microhardness mapping used to compare the efficacy of LED and
PAC curing lights. Operative Dentistry. 2010; 35(1): 58-68. doi: 10.2341/09-055-L, PMID: 20166412.
Sakaguchi RL, Powers JM. Craig’s Restorative Dental Materials. 13th ed. Philadelphia: Elsevier Mosby;
178-181.
Heymann HO, Swift Jr EJ, Ritter AV. Art and Science of Operative Dentistry.6th ed. St Louis: Mosby;
218-22.
Koupis NS, Martens LC, Verbeeck RM. Relative curing degree of polyacid-modified and conventional
resin composites determined by surface Knoop hardness. Dent Mater. 2006; 22(11): 1045-50. doi:
1016/j.dental.2005.08.008, PMID: 16388844
Khodadadi A, Shamsi N, Kafri S, Alaghemand H. A comparative study of the effect of QTH and LED light
curing units on the surface hardness of colored compomer and hybrid composites. Caspian J of Dent Res.
; 4: 23-9.
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