Effect of Zirconia Core Thickness and Veneer Firing Cycle on the Biaxial Flexural Strength of Veneering Ceramic.
Bilayered zirconia
core thickness
firing cycle
flexural strength
veneering ceramic
Journal
Journal of prosthodontics : official journal of the American College of Prosthodontists
ISSN: 1532-849X
Titre abrégé: J Prosthodont
Pays: United States
ID NLM: 9301275
Informations de publication
Date de publication:
Jan 2020
Jan 2020
Historique:
accepted:
15
04
2018
pubmed:
4
7
2018
medline:
21
1
2020
entrez:
4
7
2018
Statut:
ppublish
Résumé
To evaluate the influence of various Y-TZP thicknesses and veneer firing cycles on the strength of two ceramic veneers. 180 Y-TZP cores of 0.5, 1.0, and 5.0 mm thickness were prepared followed by sintering in a high temperature furnace; 180 presintered veneering ceramic discs (Vita VM9 porcelain and e.max Ceram) were also prepared using a mold. The discs were placed on zirconia plates (zirconia cores) of different thickness (0.5, 1.0, and 5.0 mm) and exposed to different firing cycles (Vita VM9 porcelain-910, 930, and 950°C; e.max Ceram-750, 770, and 790°C). Ball-on-three-balls flexural strength test was performed (universal testing machine) at a crosshead speed of 0.5 mm/min. Scanning electron microscopy of fractured specimens was performed. Means and standard deviations of flexural strength were analyzed using Tukey-Kramer HSD test for multiple comparisons. Specimens within material groups showed no significant difference (p > 0.05) for flexural strength with respect to Y-TZP core thickness (0.5, 1.0, and 5.0 mm) (VM9 [117.30 ± 14.328, 117.75 ± 13.66, 113.75 ± 20.10], e.max Ceram [94.79 ± 17.5, 100.02 ± 14.7, 95.23 ± 15.4]). Flexural strength within material groups with respect to different firing cycles ([VM9-910, 930, 950°C], e.max Ceram [750, 770, 790°C]), for VM9 (111.49 ± 15.7, 120.86 ± 13.2, 116.46 ± 18.4), and e.max Ceram (94.64 ± 15.2, 101.6 ± 16.69, 93.8 ± 15.20) showed no significant difference (p > 0.05). Different zirconia thicknesses (0.5, 1.0, and 5.0 mm) and veneer firing cycles for Vita VM9 and e.max ceramics failed to show any significant influence on their biaxial flexural strengths.
Substances chimiques
Dental Porcelain
12001-21-7
Zirconium
C6V6S92N3C
zirconium oxide
S38N85C5G0
Types de publication
Journal Article
Langues
eng
Pagination
26-33Informations de copyright
© 2018 by the American College of Prosthodontists.
Références
Powers JM: Craig's Restorative Dental Materials. St. Louis, Elsevier Mosby, 2006
Zarone F, Russo S, Sorrentino R: From porcelain-fused-to-metal to zirconia: clinical and experimental considerations. Dent Mater 2011;27:83-96
Minguez C, Lyons K: Failure of crowns and bridges-a review of the literature. N Z Dent J 2007;103:7-13
Peters MC, de Vree JH, Brekelmans WA: Distributed crack analysis of ceramic inlays. J Dent Res 1993;72:1537-1542
Goodacre CJ, Bernal G, Rungcharassaeng K, et al: Clinical complications in fixed prosthodontics. J Prosthet Dent 2003;90:31-41
Conrad HJ, Seong WJ, Pesun IJ: Current ceramic materials and systems with clinical recommendations: a systematic review. J Prosthet Dent 2007;98:389-404
Sax C, Hämmerle CH, Sailer I: 10-year clinical outcomes of fixed dental prostheses with zirconia frameworks. Int J Comput Dent 2011;14:183-202
Fischer-Cripps AC, Lawn BR: Stress analysis of contact deformation in quasi-plastic ceramics. J Am Ceram Soc 1996:79;2609-2618
Kim B, Zhang Y, Pines M, et al: Fracture of porcelain-veneered structures in fatigue. J Dent Res 2007;86:142-146
Santana T, Zhang Y, Guess P, et al: Off-axis sliding contact reliability and failure modes of veneered alumina and zirconia. Dent Mater 2009;25:892-898
Zhang Y, Song JK, Lawn BR: Deep-penetrating conical cracks in brittle layers from hydraulic cyclic contact. J Biomed Mater Res B Appl Biomater 2005:73:186-193
Coffey JP, Anusavice KJ, DeHoff PH, et al: Influence of contraction mismatch and cooling rate on flexural failure of PFM systems. J Dent Res 1988;67:61-65
Tinschert J, Schulze KA, Natt G, et al: Clinical behavior of zirconia-based fixed partial dentures made of DC-Zirkon: 3-year results. Int J Prosthodont 2008;21:217-222
Marchack BW, Futatsuki Y, Marchack CB, et al: Customization of milled zirconia copings for all-ceramic crowns: a clinical report. J Prosthet Dent 2008;99:169-173
Guazzato M, Walton TR, Franklin W, et al: Influence of thickness and cooling rate on development of spontaneous cracks in porcelain/zirconia structures. Aust Dent J 2010;55:306-310
Lawn BR, Pajares A, Zhang Y, et al: Materials design in the performance of all-ceramic crowns. Biomaterials 2004;25:2885-2892
Swain MV: Unstable cracking (chipping) of veneering porcelain on all-ceramic dental crowns and fixed partial dentures. Acta Biomater 2009;5:1668-1677
Vagkopoulou T, Koutayas SO, Koidis P, et al: Zirconia in dentistry: Part 1. Discovering the nature of an upcoming bioceramic. Eur J Esthet Dent 2009;4:130-151
Denry I, Kelly JR: State of the art of zirconia for dental applications. Dent Mater 2008:24:299-307
Millen CS, Reuben RL, Ibbetson RJ: The effect of coping/veneer thickness on the fracture toughness and residual stress of implant supported, cement retained zirconia and metal-ceramic crowns. Dent Mater 2012;28:250-258
Rekow ED, Harsono M, Janal M, et al: Factorial analysis of variables influencing stress in all-ceramic crowns. Dent Mater 2006;22:125-132
Rafferty BT, Janal MN, Zavanelli RA, et al: Design features of a three-dimensional molar crown and related maximum principal stress. A finite element model study. Dent Mater 2010;26:156-163
Ha SR, Kim SH, Han JS, et al: The influence of various core designs on stress distribution in the veneered zirconia crown: a finite element analysis study. J Adv Prosthodont 2013;5:187-197
Chiche GJ, Penault A: Esthetics of Anterior Fixed Prosthodontics. Chicago, Quintessence, 1994
Wakabayashi N, Anusavice KJ: Crack initiation modes in bilayered alumina/porcelain disks as a function of core/veneer thickness ratio and supporting substrate stiffness. J Dent Res 2000;79:1398-1404
Proos KA, Swain MV, Ironside J, et al: Influence of core thickness on a restored crown of a first premolar using finite element analysis. Int J Prosthodont 2003:16:474-480
Shiezadeh M, Seyf M, Rajati HR, et al: Effect of zirconia thickness on the tensile stress of zirconia based all-ceramic restorations. J Dent Mat Tech 2015:4;137-142
Shijo Y, Shinya A, Gomi H, et al: Studies on mechanical strength, thermal expansion of layering porcelains to alumina and zirconia ceramic core materials. Dent Mater J 2009;28:352-361
Christel P, Meunier A, Heller M, et al: Mechanical properties and short-term in-vivo evaluation of yttrium-oxide-partially-stabilized zirconia. J Biomed Mater Res 1989;23:45-61
Akesson J, Sundh, A, Sjögren G: Fracture resistance of all-ceramic crowns placed on a preparation with a slice-formed finishing line. J Oral Rehabil 2009;36:516-523
Reich S, Petschelt A, Lohbauer U: The effect of finish line preparation and layer thickness on the failure load and fractography of ZrO2 copings. J Prosthet Dent 2008;99:369-376
Lenz J, Thies M: Thermal stresses in Ceram metallic crowns: Firing in layers. Chinese J Dent Res 2002:3;5-24
Sailer I, Fehér A, Filser F, et al: Prospective clinical study of zirconia posterior fixed partial dentures: 3-year follow-up. Quintessence Int 2006;37:685-693
Taskonak B, Borges GA, Mecholsky JJ Jr, et al: The effects of viscoelastic parameters on residual stress development in a zirconia/glass bilayer dental ceramic. Dent Mater 2008;24:1149-1155
Taskonak B, Mecholsky JJ Jr, Anusavice KJ: Residual stresses in bilayer dental ceramics. Biomaterials 2005;26:3235-3241
Mackert, JR, Williams AL: Microcracks in dental porcelain and their behavior during multiple firing. J Dent Res 1996;75:1484-1490