Effect of photoinitiator concentration on marginal and internal adaptation of experimental composite blends photocured by modulated methods

Roberta Caroline Bruschi Alonso; Eduardo José Carvalho de Souza-Júnior; Diogo Dressano; Giovana Albamonte Spagnolo de Araújo; José Manuel Ces Rodriguez; Vinícius Di Hipólito; Camillo Anauate-Netto; Regina Maria Puppin-Rontani; Mario Alexandre Coelho Sinhoreti

doi:10.4103/1305-7456.119056

European Journal of Dentistry, Inhaltsverzeichnis

CC BY-NC-ND 4.0 · Eur J Dent 2013; 07(S 01): S001-S008
DOI: 10.4103/1305-7456.119056

Original Article

Dental Investigation Society

Effect of photoinitiator concentration on marginal and internal adaptation of experimental composite blends photocured by modulated methods

Roberta Caroline Bruschi Alonso

¹Biomaterials, Bandeirante Anhanguera University (UNIBAN), Rua, Maria Candida, 1813 - Bloco G - 6° Andar, São Paulo, SP, Brazil

,

Eduardo José Carvalho de Souza-Júnior

²Department of Restorative Dentistry, Dental Materials, Piracicaba Dental School (Fop-Unicamp), Avenida Limeira, 901 Piracicaba, SP, Brazil

,

Diogo Dressano

²Department of Restorative Dentistry, Dental Materials, Piracicaba Dental School (Fop-Unicamp), Avenida Limeira, 901 Piracicaba, SP, Brazil

,

Giovana Albamonte Spagnolo de Araújo

²Department of Restorative Dentistry, Dental Materials, Piracicaba Dental School (Fop-Unicamp), Avenida Limeira, 901 Piracicaba, SP, Brazil

,

José Manuel Ces Rodriguez

¹Biomaterials, Bandeirante Anhanguera University (UNIBAN), Rua, Maria Candida, 1813 - Bloco G - 6° Andar, São Paulo, SP, Brazil

,

Vinícius Di Hipólito

¹Biomaterials, Bandeirante Anhanguera University (UNIBAN), Rua, Maria Candida, 1813 - Bloco G - 6° Andar, São Paulo, SP, Brazil

,

Camillo Anauate-Netto

¹Biomaterials, Bandeirante Anhanguera University (UNIBAN), Rua, Maria Candida, 1813 - Bloco G - 6° Andar, São Paulo, SP, Brazil

,

Regina Maria Puppin-Rontani

³Department of Pediatric Dentistry, Piracicaba Dental School (Fop-Unicamp), Avenida Limeira, 901 Piracicaba, SP, Brazil

,

Mario Alexandre Coelho Sinhoreti

²Department of Restorative Dentistry, Dental Materials, Piracicaba Dental School (Fop-Unicamp), Avenida Limeira, 901 Piracicaba, SP, Brazil

› Institutsangaben

Abstract

als PDF herunterladen

ABSTRACT

Objective: The aim of this study was to evaluate the influence of photoinitiator concentration on marginal and internal adaptation of composites photocured by modulated methods. Materials and Methods: Composites based on BisGMA/triethylene glycol dimethacrylate and 65 wt% of filler were prepared with different concentrations of camphorquinone/amine (C1-0.5%, C2-1%, C3-1.5%). Cavities were prepared (3 mm × 3 mm × 2 mm) on the buccal surface of 120 bovine incisors and the adhesive system Adper Single Bond 2 was applied following manufactures instruction. Specimens were then distributed according to type of composite (C1, C2, C3) and photoactivation method (high-intensity - 750 mW/cm ² for 40 s; low intensity - 150 mW/cm ² for 200 s; soft-start - 150 mW/cm ² for 10 s + 750 mW/cm ² for 38 s; pulse-delay - 150 mW/cm ² for 10 s + 3 min dark + 750 mW/cm ² for 38 s). Superficial and internal margins were analyzed by scanning electron microscopy, using the epoxy replica technique. The length of gaps was expressed as a percentage of the total length of the margins. Data were submitted to two-way analysis of variance and Tukey′s test (α =0.05). Results: Modulated curing methods did not influence gap formation regarding both superficial and internal adaptation. The composite with the lower initiator concentration (C1) presented higher gap formation when compared with those with higher concentrations (C2 and C3).Conclusion:Modulated photoactivation methods did not reduce gap formation for the experimental composite restorations evaluated. However, higher photoinitiator concentrations promote better marginal seal.

Key words:

Camphorquinone - gap formation - modulated photoactivation methods - pulse-delay - resin composites - soft-start

PDF (1282 kb)

Referenzen

REFERENCES
1 Braga RR, Ballester RY, Ferracane JL. Factors involved in the development of polymerization shrinkage stress in resin-composites: A systematic review. Dent Mater 2005; 21: 962-70
2 Hilton TJ. Can modern restorative procedures and materials reliably seal cavities? In vitro investigations Part 2. Am J Dent 2002; 15: 279-89
3 Hilton TJ. Can modern restorative procedures and materials reliably seal cavities? In vitro investigations. Part 1. Am J Dent 2002; 15: 198-210
4 Amirouche-Korichi A, Mouzali M, Watts DC. Effects of monomer ratios and highly radiopaque fillers on degree of conversion and shrinkage-strain of dental resin composites. Dent Mater 2009; 25: 1411-8
5 Atai M, Watts DC, Atai Z. Shrinkage strain-rates of dental resin-monomer and composite systems. Biomaterials 2005; 26: 5015-20
6 Schneider LF, Consani S, Sakaguchi RL, Ferracane JL. Alternative photoinitiator system reduces the rate of stress development without compromising the final properties of the dental composite. Dent Mater 2009; 25: 566-72
7 Ikemura K, Endo T. A review of the development of radical photopolymerization initiators used for designing light-curing dental adhesives and resin composites. Dent Mater J 2010; 29: 481-501
8 Pfeifer CS, Ferracane JL, Sakaguchi RL, Braga RR. Photoinitiator content in restorative composites: Influence on degree of conversion, reaction kinetics, volumetric shrinkage and polymerization stress. Am J Dent 2009; 22: 206-10
9 Alonso RC, Correr GM, Cunha LG, Brandt WC, Puppin-Rontani RM, Correr Sobrinho L. et al. Photoinitiator concentration and modulated-photoactivation: Influence on polymerization characteristics of experimental-composites. J Dent Res 2008; 87 Abstract 1801
10 Musanje L, Ferracane JL, Sakaguchi RL. Determination of the optimal photoinitiator concentration in dental composites based on essential material properties. Dent Mater 2009; 25: 994-1000
11 Yoshida K, Greener EH. Effect of photoinitiator on degree of conversion of unfilled light-cured resin. J Dent 1994; 22: 296-9
12 Nomura Y, Teshima W, Kawahara T, Tanaka N, Ishibashi H, Okazaki M. et al. Genotoxicity of dental resin polymerization initiators in vitro . J Mater Sci Mater Med 2006; 17: 29-32
13 Asmussen E. Factors affecting the color stability of restorative resins. Acta Odontol Scand 1983; 41: 11-8
14 Ferracane JL, Greener EH. The effect of resin formulation on the degree of conversion and mechanical properties of dental restorative resins. J Biomed Mater Res 1986; 20: 121-31
15 Ferracane JL, Mitchem JC, Condon JR, Todd R. Wear and marginal breakdown of composites with various degrees of cure. J Dent Res 1997; 76: 1508-16
16 Alvim HH, Alecio AC, Vasconcellos WA, Furlan M, de Oliveira JE, Saad JR. Analysis of camphorquinone in composite resins as a function of shade. Dent Mater 2007; 23: 1245-9
17 Alonso RC, Correr GM, Cunha LG, De Moraes Souto PantojaCA, Puppin-Rontani RM, Sinhoreti MA. Modulated photoactivation methods - Effect on marginal and internal gap formation of restorations using different restorative composites. J Biomed Mater Res B Appl Biomater 2007; 82: 346-51
18 Cunha LG, Alonso RC, Pfeifer CS, Correr-Sobrinho L, Ferracane JL, Sinhoreti MA. Modulated photoactivation methods: Influence on contraction stress, degree of conversion and push-out bond strength of composite restoratives. J Dent 2007; 35: 318-24
19 Cunha LG, Alonso RC, Pfeifer CS, Correr-Sobrinho L, Ferracane JL, Sinhoreti MA. Contraction stress and physical properties development of a resin-based composite irradiated using modulated curing methods at two C-factor levels. Dent Mater 2008; 24: 392-8
20 Alonso RC, Cunha LG, Correr GM, De Goes MF, Correr-Sobrinho L, Puppin-Rontani RM. et al. Association of photoactivation methods and low modulus liners on marginal adaptation of composite restorations. Acta Odontol Scand 2004; 62: 298-304
21 Brandt WC, de Moraes RR, Correr-Sobrinho L, Sinhoreti MA, Consani S. Effect of different photo-activation methods on push out force, hardness and cross-link density of resin composite restorations. Dent Mater 2008; 24: 846-50
22 Souza-Junior EJ, de Souza-Régis MR, Alonso RC, de Freitas AP, Sinhoreti MA, Cunha LG. Effect of the curing method and composite volume on marginal and internal adaptation of composite restoratives. Oper Dent 2011; 36: 231-8
23 Cunha LG, Alonso RC, de Souza-Junior EJ, Neves AC, Correr-Sobrinho L, Sinhoreti MA. Influence of the curing method on the post-polymerization shrinkage stress of a composite resin. J Appl Oral Sci 2008; 16: 266-70
24 Alonso RC, Cunha LG, Correr GM, Cunha BrandtW, Correr-Sobrinho L, Sinhoreti MA. Relationship between bond strength and marginal and internal adaptation of composite restorations photocured by different methods. Acta Odontol Scand 2006; 64: 306-13
25 Alomari QD, Barrieshi-Nusair K, Ali M. Effect of C-factor and LED curing mode on microleakage of class v resin composite restorations. Eur J Dent 2011; 5: 400-8
26 Lindberg A, Peutzfeldt A, van Dijken JW. Effect of power density of curing unit, exposure duration, and light guide distance on composite depth of cure. Clin Oral Investig 2005; 9: 71-6
27 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: 436-44
28 Yoshikawa T, Burrow MF, Tagami J. A light curing method for improving marginal sealing and cavity wall adaptation of resin composite restorations. Dent Mater 2001; 17: 359-66
29 Sahafi A, Peutzfeldt A, Asmussen E. Effect of pulse-delay curing on in vitro wall-to-wall contraction of composite in dentin cavity preparations. Am J Dent 2001; 14: 295-6
30 Asmussen E, Peutzfeldt A. Influence of pulse-delay curing on softening of polymer structures. J Dent Res 2001; 80: 1570-3
31 Yazici AR, Celik C, Dayangac B, Ozgunaltay G. Effects of different light curing units/modes on the microleakage of flowable composite resins. Eur J Dent 2008; 2: 240-6
32 Park YJ, Chae KH, Rawls HR. Development of a new photoinitiation system for dental light-cure composite resins. Dent Mater 1999; 15: 120-7
33 Kemp-Scholte CM, Davidson CL. Complete marginal seal of Class V resin composite restorations effected by increased flexibility. J Dent Res 1990; 69: 1240-3
34 Taira M, Urabe H, Hirose T, Wakasa K, Yamaki M. Analysis of photo-initiators in visible-light-cured dental composite resins. J Dent Res 1988; 67: 24-8
35 Shintani H, Inoue T, Yamaki M. Analysis of camphorquinone in visible light-cured composite resins. Dent Mater 1985; 1: 124-6
36 Calheiros FC, Daronch M, Rueggeberg FA, Braga RR. Influence of irradiant energy on degree of conversion, polymerization rate and shrinkage stress in an experimental resin composite system. Dent Mater 2008; 24: 1164-8
37 Geurtsen W, Spahl W, Leyhausen G. Variability of cytotoxicity and leaching of substances from four light-curing pit and fissure sealants. J Biomed Mater Res 1999; 44: 73-7
38 Moin Jan C, Nomura Y, Urabe H, Okazaki M, Shintani H. The relationship between leachability of polymerization initiator and degree of conversion of visible light-cured resin. J Biomed Mater Res 2001; 58: 42-6
39 Larson TD. The clinical significance of marginal fit. Northwest Dent 2012; 91: 22-9
40 Irie M, Suzuki K, Watts DC. Marginal gap formation of light-activated restorative materials: Effects of immediate setting shrinkage and bond strength. Dent Mater 2002; 18: 203-10
41 Marshall Jr GW, Marshall SJ, Kinney JH, Balooch M. The dentin substrate: Structure and properties related to bonding. J Dent 1997; 25: 441-58
42 Bechtold J, Dos Santos PJ, Anido-Anido A, Di Hipólito V, Alonso RC, D′Alpino PH. Hardness, polymerization depth, and internal adaptation of Class II silorane composite restorations as a function of polymerization protocol. Eur J Dent 2012; 6: 133-40
43 Frankenberger R, Pashley DH, Reich SM, Lohbauer U, Petschelt A, Tay FR. Characterisation of resin-dentine interfaces by compressive cyclic loading. Biomaterials 2005; 26: 2043-52
44 Momoi Y, Iwase H, Nakano Y, Kohno A, Asanuma A, Yanagisawa K. Gradual increases in marginal leakage of resin composite restorations with thermal stress. J Dent Res 1990; 69: 1659-63
45 Correr GM, Bruschi Alonso RC, Puppin-Rontani RM, Correr-Sobrinho L, Coelho Sinhoreti MA. Marginal and internal adaptation of composite restorations using a resin liner on deproteinized substrate. Acta Odontol Scand 2005; 63: 227-32
46 Lopes MB, Costa LA, Consani S, Gonini AJ, Sinhoreti MA. SEM evaluation of marginal sealing on composite restorations using different photoactivation and composite insertion methods. Indian J Dent Res 2009; 20: 394-9
47 Amaral CM, Peris AR, Ambrosano GM, Pimenta LA. Microleakage and gap formation of resin composite restorations polymerized with different techniques. Am J Dent 2004; 17: 156-60
48 Kinomoto Y, Torii M, Takeshige F, Ebisu S. Comparison of polymerization contraction stresses between self- and light-curing composites. J Dent 1999; 27: 383-9
49 Davidson CL, Feilzer AJ. Polymerization shrinkage and polymerization shrinkage stress in polymer-based restoratives. J Dent 1997; 25: 435-40
50 Braga RR, Ferracane JL. Contraction stress related to degree of conversion and reaction kinetics. J Dent Res 2002; 81: 114-8
51 Calheiros FC, Kawano Y, Stansbury JW, Braga RR. Influence of radiant exposure on contraction stress, degree of conversion and mechanical properties of resin composites. Dent Mater 2006; 22: 799-803