Browse > Article
http://dx.doi.org/10.4047/jap.2010.2.2.33

Influence of porcelain veneering on the marginal fit of Digident and Lava CAD/CAM zirconia ceramic crowns  

Pak, Hyun-Soon (Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University)
Han, Jung-Suk (Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University)
Lee, Jai-Bong (Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University)
Kim, Sung-Hun (Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University)
Yang, Jae-Ho (Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University)
Publication Information
The Journal of Advanced Prosthodontics / v.2, no.2, 2010 , pp. 33-38 More about this Journal
Abstract
PURPOSE. Marginal fit is a very important factor considering the restoration's long-term success. However, adding porcelain to copings can cause distortion and lead to an inadequate fit which exposes more luting material to the oral environment and causes secondary caries. The purpose of this study was to compare the marginal fit of 2 different all-ceramic crown systems before and after porcelain veneering. This study was also intended to verify the marginal fit of crowns originated from green machining of partially sintered blocks of zirconia (Lava CAD/CAM system) and that of crowns obtained through machining of fully sintered blocks of zirconia (Digident CAD/CAM system). MATERIALS AND METHODS. 20 crowns were made per each system and the marginal fit was evaluated through a light microscope with image processing (Accura 2000) at 50 points that were randomly selected. Each crown was measured twice: the first measurement was done after obtaining a 0.5 mm coping and the second measurement was done after porcelain veneering. The means and standard deviations were calculated and statistical inferences among the 2 groups were made using independent t-test and within the same group through paired t-test. RESULTS. The means and standard deviations of the marginal fit were $61.52{\pm}2.88{\mu}m$ for the Digident CAD/CAM zirconia ceramic crowns before porcelain veneering and $83.15{\pm}3.51{\mu}m$ after porcelain veneering. Lava CAD/CAM zirconia ceramic crowns showed means and standard deviations of $62.22{\pm}1.78{\mu}m$ before porcelain veneering and $82.03{\pm}1.85{\mu}m$ after porcelain veneering. Both groups showed significant differences when analyzing the marginal gaps before and after porcelain veneering within each group. However, no significant differences were found when comparing the marginal gaps of each group before porcelain veneering and after porcelain veneering as well. CONCLUSION. The 2 all-ceramic crown systems showed marginal gaps that were within a reported clinically acceptable range of marginal discrepancy.
Keywords
Marginal fit; Digident CAD/CAM Zirconia Ceramic Crown; Lava CAD/CAM Ceramic Crown; Porcelain veneering;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Balkaya MC, Cinar A, Pamuk S. Influence of firing cycles on the margin distortion of 3 all-ceramic crown systems. J Prosthet Dent 2005;93:346-55.   DOI   ScienceOn
2 Reich S, Wichmann M, Nkenke E, Proeschel P. Clinical fit of all-ceramic three-unit fixed partial dentures, generated with three different CAD/CAM systems. Eur J Oral Sci 2005;113:174-9.   DOI   ScienceOn
3 Castellani D, Baccetti T, Clauser C, Bernardini UD. Thermal distortion of different materials in crown construction. J Prosthet Dent 1994;72:360-6.   DOI   ScienceOn
4 McLean JW, von Fraunhofer JA. The estimation of cement film thickness by an in vivo technique. Br Dent J 1971;131:107-111.   DOI   ScienceOn
5 McLaren EA, Terry DA. CAD/CAM systems, materials, and clinical guidelines for all-ceramic crowns and fixed partial dentures. Compend Contin Educ Dent 2002;23:637-41.
6 Steger T. Digident CAD/CAM production-growing with the possibilities. Int J Comput Dent 2004;7:77-84.
7 Shearer B, Gough MB, Setchell DJ. Influence of marginal configuration and porcelain addition on the fit of In-Ceram crowns. Biomaterials 1996;17:1891-5.   DOI   ScienceOn
8 Davis DR. Comparison of fit of two types of all-ceramic crowns. J Prosthet Dent 1988;59:12-6.   DOI   ScienceOn
9 Hung SH, Hung KS, Eick JD, Chappell RP. Marginal fit of porcelain- fused-to-metal and two types of ceramic crown. J Prosthet Dent 1990;63:26-31.   DOI   ScienceOn
10 Vahidi F, Egloff ET, Panno FV. Evaluation of marginal adaptation of all-ceramic crowns and metal ceramic crowns. J Prosthet Dent 1991;66:426-31.   DOI   ScienceOn
11 Gardner FM. Margins of complete crowns-literature review. J Prosthet Dent 1982;48:396-400.   DOI   ScienceOn
12 Weaver JD, Johnson GH, Bales DJ. Marginal adaptation of castable ceramic crowns. J Prosthet Dent 1991;66:747-53.   DOI   ScienceOn
13 Song TJ. Marginal fit of the auro galvano crown system made using the electroforming technique. Master thesis, Seoul, Korea: Seoul National University, 2004.
14 Hertlein G, Hoscheler S, Frank S, Suttor D. Marginal fit of CAD/CAM manufactured all ceramic prosthesis. J Dent Res 2001;80:42-4.
15 Gemalmaz D, Alkumru HN. Marginal fit changes during porcelain firing cycles. J Prosthet Dent 1995;73:49-54.   DOI   ScienceOn
16 Lui JL. The effect of firing shrinkage on the marginal fit of porcelain jacket crowns. Br Dent J 1980;149:43-5.   DOI   ScienceOn
17 Yeo IS, Yang JH, Lee JB. In vitro marginal fit of three all-ceramic crown systems. J Prosthet Dent 2003;90:459-64.   DOI   ScienceOn
18 Groten M, Axmann D, Probster L, Weber H. Determination of the minimum number of marginal gap measurements required for practical in-vitro testing. J Prosthet Dent 2000;83:40-9.   DOI   ScienceOn
19 Gassino G, Barone Monfrin S, Scanu M, Spina G, Preti G. Marginal adaptation of fixed prosthodontics: a new in vitro 360- degree external examination procedure. Int J Prosthodont 2004;17:218-23.
20 Piwowarczyk A, Ottl P, Lauer HC, Kuretzky T. A clinical report and overview of scientific studies and clinical procedures conducted on the 3M ESPE Lava All-Ceramic System. J Prosthodont 2005;14:39-45   DOI   ScienceOn
21 Beschnidt SM, Strub JR. Evaluation of the marginal accuracy of different all-ceramic crown systems after simulation in the artificial mouth. J Oral Rehabil 1999;26:582-93.   DOI   ScienceOn
22 Kern M, Schaller HG, Strub JR. Marginal fit of restorations before and after cementation in vivo. Int J Prosthodont 1993;6:585-91.
23 Pera P, Gilodi S, Bassi F, Carossa S. In vitro marginal adaptation of alumina porcelain ceramic crowns. J Prosthet Dent 1994;72:585-90.   DOI   ScienceOn