Open Access, Peer-reviewed, Quarterly
pISSN 0301-2875
eISSN 2005-3789
    J Korean Acad Prosthodont. 2009 Oct;47(4):416-423. Korean.
    Published online Oct 31, 2009.
    https://doi.org/10.4047/jkap.2009.47.4.416
    Copyright © 2009 The Korean Academy of Prosthodontics
    Original Article

    Comparison of the degree of conversion of light-cured resin cement in regard to porcelain laminate thickness, light source and curing time using FT-IR

    Chi-Sung Yuh, DDS, MSD,1 Jee-Hwan Kim, DDS, MSD,2 Sun-Jai Kim, DDS, MSD, PhD,3 Yong-Keun Lee, PhD,4 and June-Sung Shim, DDS, PhD5
      • 1Graduate Student, Department of Prosthodontics, College of Dentisry, Graduate School, Yonsei University, Korea.
      • 2Clinical Assistant Professor, Department of Prosthodontics, College of Dentisry, Graduate School, Yonsei University, Korea.
      • 3Assistant Professor, Department of Prosthodontics, College of Dentisry, Graduate School, Yonsei University, Korea.
      • 4Associate Professor, Department of Dental Biomaterials and Bioengineering, College of Dentisry, Graduate School, Yonsei University, Korea.
      • 5Associate Professor, Department of Prosthodontics, College of Dentisry, Graduate School, Yonsei University, Korea.
    • Corresponding Author: June-Sung Shim. Department of Prosthodontics, College of Dentistry, Yonsei University, 134 Sinchon-dong, Seodamun-gu, Seoul, 120-749, Korea. +82 2 2228 3160: Email: jfshim@yumc.ac.kr
    Received August 21, 2009; Revised October 07, 2009; Accepted October 12, 2009.

    Abstract

    Statement of problem

    The degree of light attenuation at the time of cementation of the PLV restoration depends on characteristics such as thickness, opacity and shade of the restorations, which interfere with light transmittance and, as a result, may decrease the total energy reaching the luting cement.

    Purpose

    The purpose of this study was to compare the degree of conversion of light-cured resin cements measuring by FT-IR in regard to different thickness, light devices and curing time.

    Material and methods

    In the control group, a clear slide glass (1.0 mm) was positioned between the light cured resin cement and light source. The specimens of ceramics were made with IPS Empress Esthetic. The ceramics were fabricated with varying thicknesses-0.5, 1.0, 1.5 mm with shade ETC1. Rely X™ Veneer with shade A3, light-cured resin cement, was used. Light-activation was conducted through the ceramic using a quartz tungsten halogen curing unit, a light emitting diode curing unit and a plasma arc curing unit. The degree of conversion of the light-cured resin cement was evaluated using FT-IR and OMNIC. One-way ANOVA and Tukey HSD test were used for statistical analysis (α< .05).

    Results

    The degree of conversion (DC) of photopolymerization using QTH and LED was higher than results of using PAC in the control group. After polymerization using QTH and LED, the DC results from the different ceramic thickness- 0.5 mm, 1.0 mm, 1.5 mm- did not show a significant difference when compared with those of control group. However, the DC for polymerization using PAC in the 1.5mm ceramic group showed significantly lower DC than those of the control group and 0.5 mm ceramic group (P < .05). At 80 s and 160 s, the DC of light-cured resin cement beneath 1.0 mm ceramic using LED was significantly higher than at 20 s (P < .05).

    Conclusion

    Within the limitation of this study, when adhering PLV to porcelain with a thickness between 0.5 - 1.5 mm, the use of PAC curing units were not considered however, light cured resin cements were effective when cured for over 40 seconds with QTH or LED curing units. Also, when curing the light cured resin cements with LED, the degree of polymerization was not proportional with the curing time. Curing exceeding a certain curing time, did not significantly affect the degree of polymerization.

    Keywords
    Dental ceramic; FT-IR; Resin cement; Degree of polymerization

    Figures

    Fig. 1
    Schematic illustration of the infrared spectroscopy set-up (cross sectional view).

    Fig. 2
    FT-IR spectra before (solid-line) and after (dotted-line) photopolymerization (an example from group Q10).

    Tables

    Table I
    Description of the curing devices used in this study

    Table II
    Description of the experimental groups used in this study

    Table III
    Results of two-way ANOVA for degree of conversion

    Table IV
    Comparison of DC values (%) among groups according to ceramic thickness and light source

    Table V
    Comparison of DC values (%) according to curing time among groups using LED and 1.0 mm ceramic

    References

      1. Fradeani M. Six-year follow-up with Empress veneers. Int J Periodontics Restorative Dent 1998;18:216–225.
      1. Fradeani M, Redemagni M, Corrado M. Porcelain laminate veneers: 6- to 12-year clinical evaluation-a retrospective study. Int J Periodontics Restorative Dent 2005;25:9–17.
      1. el-Mowafy OM, Rubo MH, el-Badrawy WA. Hardening of new resin cements cured through a ceramic inlay. Oper Dent 1999;24:38–44.
      1. Blackman R, Barghi N, Duke E. Influence of ceramic thickness on the polymerization of light-cured resin cement. J Prosthet Dent 1990;63:295–300.
      1. Strang R, Macdonald I, O'Hagan S, Murray J, Stephen KW. Variations in performance of curing light units by determination of composite resin setting time. Br Dent J 1987;162:63–65.
      1. Nathanson D. Etched porcelain restorations for improved esthetics, part II: Onlays. Compendium 1987;8:105–110.
      1. Rasetto FH, Driscoll CF, Prestipino V, Masri R, von Fraunhofer JA. Light transmission through all-ceramic dental materials: a pilot study. J Prosthet Dent 2004;91:441–446.
      1. Uctasli S, Hasanreisoglu U, Wilson HJ. The attenuation of radiation by porcelain and its effect on polymerization of resin cements. J Oral Rehabil 1994;21:565–575.
      1. Myers ML, Caughman WF, Rueggeberg FA. Effect of restoration composition, shade, and thickness on the cure of a photoactivated resin cement. J Prosthodont 1994;3:149–157.
      1. Nathanson D, Banasr F. Color stability of resin cements--an in vitro study. Pract Proced Aesthet Dent 2002;14:449–455.
      1. Calamia JR, Calamia CS. Porcelain laminate veneers: reasons for 25 years of success. Dent Clin North Am 2007;51:399–417.
      1. Asmussen E. Restorative resins: hardness and strength vs. quantity of remaining double bonds. Scandinavian J Dent Res 1982;90:484–489.
      1. Pianelli C, Devaux J, Bebelman S, Leloup G. The micro-Raman spectroscopy, a useful tool to determine the degree of conversion of light-activated composite resins. J Biome Mater Res 1999;48:675–681.
      1. Jung H, Friedl KH, Hiller KA, Haller A, Schmalz G. Curing efficiency of different polymerization methods through ceramic restorations. Clin Oral Investig 2001;5:156–161.
      1. Koch A, Kroeger M, Hartung M, Manetsberger I, Hiller KA, Schmalz G, Friedl KH. Influence of ceramic translucency on curing efficacy of different light-curing units. J Adhes Dent 2007;9:449–462.
      1. Tango RN, Sinhoreti MA, Correr AB, Correr-Sobrinho L, Henriques GE. Effect of light-curing method and cement activation mode on resin cement knoop hardness. J Prosthodont 2007;16:480–484.
      1. Borges GA, Agarwal P, Miranzi BA, Platt JA, Valentino TA, dos Santos PH. Influence of different ceramics on resin cement Knoop Hardness Number. Oper Dent 2008;33:622–628.
      1. Matsumoto H, Gres JE, Marker VA, Okabe T, Ferracane JL, Harvey GA. Depth of cure of visible light-cured resin: clinical simulation. J Prosthet Dent 1986;55:574–578.
      1. Rueggeberg FA, Craig RG. Correlation of parameters used to estimate monomer conversion in a light-cured composite. J Dent Res 1988;67:932–937.
      1. DeWald JP, Ferracane JL. A comparison of four modes of evaluating depth of cure of light-activated composites. J Dent Res 1987;66:727–730.
      1. Pazin MC, Moraes RR, Goncalves LS, Borges GA, Sinhoreti MA, Correr-Sobrinho L. Effects of ceramic thickness and curing unit on light transmission through leucite-reinforced material and polymerization of dual-cured luting agent. J Oral Sci 2008;50:131–136.
      1. Moraes RR, Brandt WC, Naves LZ, Correr-Sobrinho L, Piva E. Light- and time-dependent polymerization of dual-cured resin luting agent beneath ceramic. Acta Odontol Scand 2008;66:257–261.
      1. Feng L, Carvalho R, Suh BI. Insufficient cure under the condition of high irradiance and short irradiation time. Dent Mater 2009;25:283–289.
      1. Woo YS, Kim S. A study on the mode of polymerization of light-cured restorative materials cured with plasma arc light curing unit. J Korean Acad Pediatr Dent 2002;29:262–269.
      1. Pascal Magne UB. In: Bonded porcelain restorations in the anterior dentition. Quintessence Publishing Co. Inc; 2002. pp. 242-247.
      1. Peutzfeldt A, Sahafi A, Asmussen E. Characterization of resin composites polymerized with plasma arc curing units. Dent Mater 2000;16:330–336.
      1. Feilzer AJ, Dooren LH, de Gee AJ, Davidson CL. Influence of light intensity on polymerization shrinkage and integrity of restoration-cavity interface. Eur J Oral Sci 1995;103:322–326.
      1. Maffezzoli A, Della Pietra A, Rengo S, Nicolais L, Valletta G. Photopolymerization of dental composite matrices. Biomaterials 1994;15:1221–1228.
      1. Asmussen E. Softening of BISGMA-based polymers by ethanol and by organic acids of plaque. Scand J Dent Res 1984;92:257–261.
      1. Ruyter IE, Svendsen SA. Remaining methacrylate groups in composite restorative materials. Acta Odontol Scand 1978;36:75–82.
      1. Klaiber B, Schubert K, Hugo B, Hofmann N. Comparison between a plasma arc light source and conventional halogen curing units regarding flexural strength, modulus, and hardness of photoactivated resin composites. Clin Oral Investig 2000;4:140–147.
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    MeSH Terms
    Cementation
    Ceramics
    Dental Porcelain
    Enzyme Multiplied Immunoassay Technique
    Glass
    Light
    Plasma
    Polymerization
    Polymers
    Quartz
    Resin Cements
    Tungsten
    Metrics
    Share
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