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CC BY-NC-ND 4.0 · Eur J Dent 2011; 05(04): 400-408
DOI: 10.1055/s-0039-1698912
Original Article
Dental Investigation Society

Effect of C-factor and LED Curing Mode on Microleakage of Class V Resin Composite Restorations

Qasem Diefallah Alomari
a   Department of Restorative Sciences, Faculty of Dentistry, Kuwait University, Kuwait
,
Kefah Barrieshi-Nusair
b   Deceased.
,
Mohammad Ali
c   Department of Diagnostic Sciences, Faculty of Dentistry, Kuwait University, Kuwait.
› Author Affiliations
Further Information

Publication History

Publication Date:
30 September 2019 (online)

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ABSTRACT

Objectives: To investigate the effects of cavity C-factor and LED curing mode on microleakage of class V resin composite restorations. Methods: Eighty extracted human maxillary premolars were divided into four groups. In groups I and II, V-shaped class V cavities (C-factor ≈ 1.5) were prepared while box-shaped class V cavities (high C-factor ≈ 4) were prepared in groups III and IV. All the cavities were prepared on the vestibular surfaces of the teeth. All the cavities were prepared by one operator with specific dimensions. The same adhesive system (Excite) and the same restorative composite (Tetric Ceram) were used in all the groups. The restorations in groups I and III were cured with the fast curing mode of LED curing light, while the restorations in groups II and IV were cured with the soft-start mode of the same curing light. The samples were thermocycled, immersed in a 0.5% basic fuchsin solution for 24 hours, and sectioned. The degree of dye penetration was measured quantitatively and then qualitatively at both enamel and dentin/cementum margins. Results: Quantitatively, there was no statistical difference in the degree of microleakage between the groups at the enamel margin (P>.05). At the dentin/cementum margin, group III showed significantly more dye penetration than the other groups (P<.001). Similarly, qualitative measurements of dye penetration showed that group III had higher microleakage at dentin/cementum margin than the remaining groups (I and III P<.001; II and III P<.01; III and IV P<.01). Paired sample statistics showed that microleakage at the dentin/cementum margin was not statistically different from enamel microleakage (P>.05), except for group III (P<.000). Conclusions: Fast curing mode of LED curing light resulted in more microleakage at the gingival floor of class V cavities with high C-factor. There was no difference in dye penetration between enamel and dentin margins of the cavities except when the fast curing mode was used with high C-factor cavities. Both quantitative and qualitative measurements of microleakage gave the same results at both enamel and dentin margins. (Eur J Dent 2011;5:400-408)

Key words:

Resin composite - Microleakage - C-factor - LED curing units - Curing modes
 

  • REFERENCES

  • 1 Yap AU, Wang HB, Siow KS, Gan LM. Polymerization shrinkage of visible light-cured composites. Oper Dent 2000;25:98-103.
  • 2 Briso AL, Mestrener SR, Delicio G, Sundfeld RH, Bedran- Russo AK, de Alexandre RS, Ambrosano GM. Clinical assessment of postoperative sensitivity in posterior composite restorations Oper Dent 2007;32:421-426.
  • 3 Alomari QD, Omar R, Akpata SE. Effect of LED curing modes on postoperative sensitivity after class II resin composite restorations. J Adhes Dent 2007;9:477-481.
  • 4 Sakaguchi RL, Wiltbank BD, Murchison CF. Cure induced stresses and damage in particulate reinforced polymer matrix composites: a review of the scientific literature. Dent Mater 2005;21:43-46.
  • 5 Ferracane JL. Developing a more complete understanding of stresses produced in dental composites during polymerization. Dent Mater 2005;21:36-42.
  • 6 Hofmann N, Hunecke A. Influence of curing methods and matrix type on the marginal seal of class II resin-based composite restorations in vitro. Oper Dent 2006;31:97-105.
  • 7 Ilie N, Felten K, Trixner K, Hickel R, Kunzelmann KH. Shrinkage behavior of a resin-based composite irradiated with modern curing units. Dent Mater 2005;21:483-489.
  • 8 Kubo S, Yokota H, Yokota H, Hayashi Y. The effect of lightcuring modes on the microleakage of cervical resin composite restorations. J Dent 2004;32:247-254.
  • 9 Leonard DL, Charlton DG, Roberts HW, Cohen ME. Polymerization efficiency of LED curing lights. J Esthet Restor Dent 2002;14:286-295.
  • 10 Lim BS, Ferracane JL, Sakaguchi RL, Condon JR. Reduction of polymerization contraction stress for dental composites by two-step light-activation. Dent Mater 2002;18:436-444.
  • 11 Dewaele M, Asmussen E, Peutzfeldt A, Munksgaard EC, Benetti AR, Finné G, Leloup G, Devaux J. Influence of curing protocol on selected properties of light-curing polymers: degree of conversion, volume contraction, elastic modulus, and glass transition temperature. Dent Mater 2009;25:1576-1584.
  • 12 Fróes-Salgado NR, Pfeifer CS, Francci CE, Kawano Y. Influence of photoactivation protocol and light guide distance on conversion and microleakage of composite restorations. Oper Dent 2009;34:408-414.
  • 13 Lu H, Stansbury JW, Bowman CN. Impact of curing protocol on conversion and shrinkage stress. J Dent Res 2005;84:822- 826.
  • 14 Braga RR, Boaro LC, Kuroe T, Azevedo CL, Singer JM. Influence of cavity dimensions and their derivatives (volume and ‘C’ factor) on shrinkage stress development and microleakage of composite restorations. Dent Mater 2006;22:818-823.
  • 15 Costa Pfeifer CS, Braga RR, Cardoso PE. Influence of cavity dimensions, insertion technique and adhesive system on microleakage of Class V restorations. J Am Dent Assoc 2006;137:197-202.
  • 16 Duarte S Jr, Dinelli W, da Silva MH. Influence of resin composite insertion technique in preparations with a high Cfactor. Quintessence Int 2007;38:829-835.
  • 17 Feilzer, AJ, De Gee AJ, Davidson CL. Setting stress in composite resin relation to configuration of the restoration. J Dent Res 1987;66:1636-1639.
  • 18 Bouillaguet S, Ciucchi B, Jacoby T, Wataha JC, Pashley D. Bonding characteristics to dentin walls of class II cavities, in vitro. Dent Mater 2001;17:316-321.
  • 19 Cunha LG, Alonso RC, Neves AC, de Goes MF, Ferracane JL, Sinhoreti MA. Degree of conversion and contraction stress development of a resin composite irradiated using halogen and LED at two C-factor levels. Oper Dent 2009;34:24-31.
  • 20 Nikolaenko SA, Lohbauer U, Roggendorf M, Petschelt A, Dasch W, Frankenberger R. Influence of c-factor and layering technique on microtensile bond strength to dentin. Dent Mater 2004;20:579-585.
  • 21 Davidson CL, de Gee AJ. Light-curing units, polymerization, and clinical implications. J Adhes Dent 2000;2:167-173.
  • 22 Oberholzer TG, Schünemann M, Kidd M. Effect of LED curing on microleakage and microhardness of Class V resinbased composite restorations. Int Dent J 2004;54:15-20.
  • 23 Nalcaci A, Ulusoy N. Effect of Thermocycling on microleakage of resin composites polymerized with LED curing techniques. Quintessence Int 2007;38:e433-439.
  • 24 Oberholzer TG, Du Preez IC, Kidd M. Effect of LED curing on the microleakage, shear bond strength and surface hardness of a resin-based composite restoration. Biomaterials 2005;26:3981-3986.
  • 25 Ozturk AN, Usumez A, Ozturk B, Usumez S. Influence of different light sources on microleakage of class V composite restorations. J Oral Rehabil 2004;31:500-504.
  • 26 Rosales-Leal JI. Microleakage of Class V composite restorations placed with etch-and-rinse and self-etching adhesives before and after thermocycling. J Adhes Dent 2007;9:255-259.
  • 27 Yammazaki PCV, Bedran-Russo AKB, Pereira PNR, Swift Jr EJ. Microleakage evaluation of a new low-shrinkage composite restorative material. Oper Dent 2006;31:670-676.
  • 28 Orellana N, Ramírez R, Roig M, Giner L, Mercade M, Durán F, Herrera G. Comparative study of the microtensile bond strength of three different total etch adhesives with different solvents to wet and dry dentin (in vitro test). Acta Odontol Latinoam 2009;22:47-56.
  • 29 Watts DC, Marouf AS, Al-Hindi AM. Photo-polymerization shrinkage-stress kinetics in resin-composites: methods development. Dent Mater 2003;19:1-11.
  • 30 Santini A, Ivanovic V, Ibbetson R, Milia E. Influence of cavity configuration on microleakage around Class V restorations bonded with seven self-etching adhesives. J Esthet Restor Dent 2004;16:128-135; discussion 136.
  • 31 Soh MS, Yap AU, Siow KS. Post-gel shrinkage with different modes of LED and halogen light curing units. Oper Dent 2004;29:317-324.
  • 32 Yoshikawa T, Nakaoki Y, Takada T, Burrow MF, Tagami J. Effect of light-curing method and irradiation time on marginal sealing and cavity wall adaptation of resin composite restorations. Am J Dent 2003;16:63A-67A.
  • 33 Swift Jr EJ. Dentin/enamel adhesives: review of the literature. Pediatr Dent 2002;24:456-461.
  • 34 Chan DC, Browning WD, Frazier KB, Brackett MG. Clinical evaluation of the soft-start (pulse-delay) polymerization technique in Class I and II composite restorations. Oper Dent 2008;33:265-271.
  • 35 Alomari QD, Mansour YF. Effect of LED curing modes on cusp deflection and hardness of composite restorations. Oper Dent 2005;30:684-689.
  • 36 Felix CA, Price RB, Andreou P. Effect of reduced exposure times on the microhardness of 10 resin composites cured by high-power LED and QTH curing lights. J Can Dent Assoc 2006;72:147.
  • 37 Tarle Z, Knezevic A, Demoli N, Meniga A, Sutaloa J, Unterbrink G, Ristic M, Pichler G. Comparison of composite curing parameters: effects of light source and curing mode on conversion, temperature rise and polymerization shrinkage. Oper Dent 2006;31:219-226.
  • 38 Nalçaci A, Salbaş M, Ulusoy N. The effects of soft-start vs continuous-light polymerization on microleakage in class II resin composite restorations. J Adhes Dent 2005;7:309-314.
  • 39 Cehreli ZC, Gungor HC. Quantitative microleakage evaluation of fissure sealants applied with or without a bonding agent: results after four-year water storage in vitro. J Adhes Dent 2008;10:379-384.