Finite Element Analysis of Full Ceramic Crowns with and without Zirconia Framework
Simulation of occlusal function during laboratory
material-s testing becomes essential in predicting long-term
performance before clinical usage. The aim of the study was to assess
the influence of chamfer preparation depth on failure risk of heat
pressed ceramic crowns with and without zirconia framework by
means of finite element analysis. 3D models of maxillary central
incisor, prepared for full ceramic crowns with different depths of the
chamfer margin (between 0.8 and 1.2 mm) and 6-degree tapered
walls together with the overlying crowns were generated using
literature data (Fig. 1, 2). The crowns were designed with and
without a zirconia framework with a thickness of 0.4 mm. For all
preparations and crowns, stresses in the pressed ceramic crown,
zirconia framework, pressed ceramic veneer, and dentin were
evaluated separately. The highest stresses were registered in the
dentin. The depth of the preparations had no significant influence on
the stress values of the teeth and pressed ceramics for the studied
cases, only for the zirconia framework. The zirconia framework
decreases the stress values in the veneer.
[1] Silva, N.R.F.A.; Bonfante, E.A.; Zavanelli, R.A.; Thompson, V.P.;
Ferencz, J.L. & Coelho, P.G. (2010). Reliability of Metalloceramic and
Zirconia-based Ceramic Crowns. J Dent Res. 89(10):1051-6. ISSN
0022-0345.
[2] Coelho, P.G.; Bonfante, E.A.; Silva, N.R.F.; Rekow, E.D. & Thompson,
V.P. (2009). Laboratory Simulation of Y-TZP All-ceramic Crown
Clinical Failures. J Dent Res., 88(4):382-6. ISSN 0022-0345.
[3] Shillingburg, H.T. Fundamentals of fixed prosthodontics. 3rd ed.
Chicago: Quintessence;1997.
[4] Sandu, L.; Topalâ, F. &, Porojan, S. (2012). Stress analysis in ceramic
inlays restored premolars. Advanced Materials Research; 503-504:363-6.
ISSN 1022-6680.
[5] Schmidt, K.K.; Chiayabutr Y.; Phillips, K.M. & Kois, J.C. (2011).
Influence of preparation design and existing condition of tooth structure
on load to failure of ceramic laminate veneers. J Prosthet Dent.
105(6):374-82. ISSN 0022-3913.
[1] Silva, N.R.F.A.; Bonfante, E.A.; Zavanelli, R.A.; Thompson, V.P.;
Ferencz, J.L. & Coelho, P.G. (2010). Reliability of Metalloceramic and
Zirconia-based Ceramic Crowns. J Dent Res. 89(10):1051-6. ISSN
0022-0345.
[2] Coelho, P.G.; Bonfante, E.A.; Silva, N.R.F.; Rekow, E.D. & Thompson,
V.P. (2009). Laboratory Simulation of Y-TZP All-ceramic Crown
Clinical Failures. J Dent Res., 88(4):382-6. ISSN 0022-0345.
[3] Shillingburg, H.T. Fundamentals of fixed prosthodontics. 3rd ed.
Chicago: Quintessence;1997.
[4] Sandu, L.; Topalâ, F. &, Porojan, S. (2012). Stress analysis in ceramic
inlays restored premolars. Advanced Materials Research; 503-504:363-6.
ISSN 1022-6680.
[5] Schmidt, K.K.; Chiayabutr Y.; Phillips, K.M. & Kois, J.C. (2011).
Influence of preparation design and existing condition of tooth structure
on load to failure of ceramic laminate veneers. J Prosthet Dent.
105(6):374-82. ISSN 0022-3913.
@article{"International Journal of Medical, Medicine and Health Sciences:58118", author = "Porojan S. and Sandu L. and Topală F.", title = "Finite Element Analysis of Full Ceramic Crowns with and without Zirconia Framework", abstract = "Simulation of occlusal function during laboratory
material-s testing becomes essential in predicting long-term
performance before clinical usage. The aim of the study was to assess
the influence of chamfer preparation depth on failure risk of heat
pressed ceramic crowns with and without zirconia framework by
means of finite element analysis. 3D models of maxillary central
incisor, prepared for full ceramic crowns with different depths of the
chamfer margin (between 0.8 and 1.2 mm) and 6-degree tapered
walls together with the overlying crowns were generated using
literature data (Fig. 1, 2). The crowns were designed with and
without a zirconia framework with a thickness of 0.4 mm. For all
preparations and crowns, stresses in the pressed ceramic crown,
zirconia framework, pressed ceramic veneer, and dentin were
evaluated separately. The highest stresses were registered in the
dentin. The depth of the preparations had no significant influence on
the stress values of the teeth and pressed ceramics for the studied
cases, only for the zirconia framework. The zirconia framework
decreases the stress values in the veneer.", keywords = "Finite element analysis, full ceramic crown, zirconia
framework, stresses.", volume = "6", number = "11", pages = "581-4", }