EVALUATION OF BIAXIAL FLEXURAL STRENGTH AND TRANSLUCENCY OF MULTICHROMATIC TRANSLUCENT ZIRCONIA AND LITHIUM DISILICATE CERAMICS | ||||
| Alexandria Dental Journal | ||||
| Article 15, Volume 43, Issue 2, August 2018, Page 86-93 PDF (481 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/adjalexu.2018.57637 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Jihad G. Hamed* 1; Sameer I. Bakry2; Sanaa A. Hussein2; Fayza H. Al Abbassy3 | ||||
| 1Instructor at the Fixed Prosthodontics Department, Faculty of Dentistry, Alexandria University, Egypt. | ||||
| 2Professor of Fixed Prosthodontics, Faculty of Dentistry, Alexandria University, Egypt. | ||||
| 3Professor of Dental Biomaterials, Faculty of Dentistry, Alexandria University, Egypt. | ||||
| Abstract | ||||
| INTRODUCTION: Full-contour (monolithic) zirconia restorations are gaining in popularity. High translucent zirconia materials and multilayered zirconia blocks might help to overcome the aesthetic drawbacks of traditional zirconia for fabrication of monolithic restorations OBJECTIVES: Were to evaluate the biaxial flexural strength and translucency of CAD/CAM: multichromatic ultra-translucent zirconia and comparing it with multichromatic high translucency Lithium Disilicate glass-ceramic. MATERIALS AND METHODS40 ceramic specimens were divided into two main groups; Group I: CAD/CAM multichromatic ultratranslucent Zirconia( UTML KATANA Zirconia) & Group II: Pressable multichromatic high translucent Lithium Disilicate glass-ceramic (e.max press multi). Each group was subdivided into two sub groups; sub group A: disc specimens (12mm diameter×1.5mm thickness) were fabricated (n=10) & thermocycled (500 cycles, 5°/55°C, 15 sec dwell time).Then, biaxial flexural strength was measured in MPa. Sub group B: rectangular specimens (12mm length × 10mm width × 1.5mm thickness) were fabricated (n=10). Spectrophotometric analysis was conducted to evaluate and compare the degree of translucency by translucency parameter (TP). Data were analyzed using student t-test & ANOVA with repeated measures test. RESULTS Statistical analysis of Biaxial flexural strength using student t-test revealed that group I (607.24 ± 71.79) showed higher statistically significant biaxial flexural strength values than group II (290.69 ± 41.19) ( p <0.001*). Results of translucency revealed that there were significant statistical differences between the two subgroups where IPS e.max Press Multi provided better translucency than UTML KATANA zirconia. CONCLUSIONS: Multi layered zirconia showed higher mechanical, but lower optical properties than lithium disilicate. The multi layered zirconia showed four layers with different light transmittance capabilities. It might therefore be useful for enhancing the aesthetic appearance of full-contour zirconia restorations made from this material in stress bearing areas. | ||||
| Keywords | ||||
| Biaxial Flexural Strength; translucency; Multichromatic zirconia; translucent zirconia; Lithium disilicate ceramics | ||||
| References | ||||
|
1. Conrad HJ, Seong WJ, Pesun IJ. Current ceramic materials and systems with clinical recommendations: a systematic review. J Prosthet Dent. 2007;98:389-404.
2. Rosenblum MA, Schulman A. A review of all-ceramic restorations. J Am Dent Assoc. 1997;128:297-307.
3. Guazzato M, Albakry M, Ringer SP, Swain MV. Strength, fracture toughness and microstructure of a selection of all ceramic materials. Part II. Zirconia-based dental ceramics. Dent Mater. 2004;20:449-56.
4. Beuer F, Stimmelmayr M, Gernet W, Edelhoff D, Guh JF, Naumann M. Prospective study of zirconia-based restorations: 3-year clinical results. Quintessence Int. 2010;41:631-7.
5. Fischer J, Stawarczyk B, Hammerle CH. Flexural strength of veneering ceramics for zirconia. J Dent. 2008;36:316-21.
6. Beuer F, Stimmelmayr M, Gueth JF, Edelhoff D, Naumann M. In vitro performance of full-contour zirconia single crowns. Dent Mater. 2012;28:449-56.
7. Spyropoulou PE, Giroux EC, Razzoog ME, Duff RE. Translucency of shaded zirconia core material. J Prosthet Dent. 2011;105:304-7.
8. Zhang F, Vanmeensel K, Batuk M, Hadermann J. Highly-translucent, strong and aging-resistant 3Y-TZP ceramics for dental restoration by grain boundary segregation. Acta Materialia Inc. 2015;16:215-22.
9. Baldissara P, Llukacej A, Ciocca L, Valandro FL, Scotti R. Translucency of zirconia copings made with different CAD/CAM systems. J Prosthet Dent. 2010;104:6-12.
10.Kurtulmus-Yilmaz S, Ulusoy M. Comparison of the translucency of shaded zirconia all-ceramic systems. Adv Prosthodont. 2014;6:415-22.
11.Pekkan G, Hekimoglu C. Evaluation of shear and tensile bond strength between dentin and ceramics using dualpolymerizing resin cement. J Prosthet Dent. 2009;102:242-52.
12.Addison O, Fleming GJ, Marquis PM. The effect of thermocycling on the strength of porcelain laminate veneer (PLV) materials. Dent Mater. 2003;19:291-7.
13.Timoshenko S, Woinowsky-Krieger S. Symmetrical bending of circular plates. Theory of plates and shells. 2nd ed. New York: McGraw-Hill; 87-121.
14.Johnston WM, Ma T, Kienle BH. Translucency parameter of colorants for maxillofacial prostheses. Int J Prosthodont. 1995;8:79-86. 15.ISO 6872. Dentistry–ceramic materials. Geneva: International Organization for Standardization; 2006.
16.Pieger S, Salman A, Bidra AS. Clinical outcomes of lithium disilicate single crowns and partial fixed dental prostheses: A systematic review. J Prosthet Dent. 2014;112:22-30.
17.Borges GA, Sophr AM, Goes MF, Sobrinho LC. Effect of etching and airborne particle abrasion on the microstructure of different dental ceramics. J Prosthet Dent. 2003;89:479-88. 18.Miyazaki T, Nakamura T, Matsumura H, Ban S, Kobayashi T. Current status of zirconia restorations. J Prosth Res. 2013;57:236-61.
19.Piconi C, Maccauro G. Zirconia as a ceramic biomaterial. Biomaterials. 1999; 20:1-25.
20.Kang SH, Chang J, Son HH. Flexural strength and microstructure of two lithium disilicate glass ceramics for CAD/CAM restoration in the dental clinic. Restor Dent Endod. 2013;38:134-40.
21.Johansson C, Kmet G, Rivera J, Larsson C, Vult Von Steyern P. Fracture strength of monolithic all-ceramic crowns made of high translucent yttrium oxidestabilized zirconium dioxide compared to porcelainveneered crowns and lithium disilicate crowns. Acta Odontol Scand. 2014;72:145-53.
22.Matsuzaki F, Sekine H, Honma S, Takanashi T, Furuya K, Yajima Y, et al. Translucency and flexural strength of monolithic translucent zirconia and porcelain-layered zirconia. Dent Mater J. 2015;34:910-7.
23.Church TD, Jessup JP, Guillory VL, Vandewalle KS. Translucency and strength of high-translucency monolithic zirconium oxide materials. Gen Dent. 2017;65:48-52.
24.Carrabba M, Keeling AJ, Aziz A, Vichi A, Fabian Fonzar R, Wood D, et al. Translucent zirconia in the ceramic scenario for monolithic restorations: A flexural strength and translucency comparison test. J Dent. 2017;60:70-6.
25.Corrado Piconi C, Condo SG, Kosmac T. Alumina- and zirconia-based ceramics for load-bearing applications. In: Shen JZ, Kosmač T (eds). Advanced ceramics for dentistry. Oxford: Butterworth-Heinemann; 2013. 219- 53.
26.Ueda K, Güth J, Erdelt K, Stimmelmayr M, Kappert H, Beuer F. Light transmittance by a multi-coloured zirconia material. J Dent Mater. 2015;34:310-4.
27.Lee YK, Cha HS, Ahn JS. Layered color of all-ceramic core and veneer ceramics. J Prosthet Dent. 2007;97:279- 86.
28.Denry IL. Recent advances in ceramics for dentistry. Crit Rev Oral Bio Med. 1996;7:134-43.
29.Yu B, Ahn JS, Lee YK. Measurement of translucency of tooth enamel and dentin. Acta Odontol Scand. 2009;67:57-64.
30.Heffernan MJ, Aquilino SA, Diaz-Arnold AM, Haselton DR, Stanford CM, Vargas MA. Relative translucency of six all-ceramic systems. Part II: core and veneer materials. J Prosthet Dent. 2002;88:10-5.
31.Vagkopoulou T, Koutayas SO, Koidis P, Strub JR. Zirconia indentistry: Part 1. Discovering the nature of an upcomingbioceramic. Eur J Esthet Dent. 2009;4:130-51.
32.Harada K, Raigrodski AJ, Chung KH, Flinn BD, Dogan S, Mancl LA. A comparative evaluation of the translucency of zirconias and lithium disilicate for monolithic restorations. J Prosthet Dent. 2016;116:257- 63.
33.Stawarczyk B, Frevert K, Ender A, Roos M, Sener B, Wimmer T. Comparison of four monolithic zirconia materials with conventional ones: Contrast ratio, grain size, four-point flexural strength and two-body wear. J Mech Behav Biomed Mater. 2016;59:128-38. | ||||
|
Statistics Article View: 723 PDF Download: 948 |
||||
