Surface roughness of zirconia for full-contour crowns after clinically simulated grinding and polishing

Abstract

Non-veneered zirconia crowns respond well to clinical polishing leaving a smooth finish to help combat decay, research from Germany states. Zirconia (zirconium oxide) is a high-strength material commonly used for all-ceramic tooth restoration. Zirconia crowns are often veneered with dental porcelain but the veneer is prone to chipping, particularly during the clinical polishing and grinding carried out after dental restoration procedures. The resulting rough surfaces can wear down opposing teeth and attract plaque. Rim Hmaidouch and co-workers at the Johann Wolfgang Goethe University in Frankfurt tested the effect of polishing and grinding on zirconia crowns with and without veneers, aiming to find the best quality finish. They found that, after grinding and polishing procedures, glazed zirconia with no porcelain veneer had fewer defects and less surface roughness than veneered zirconia.

Keywords

full-contour zirconia / grinding / polishing / roughness / veneering porcelain

References

[1] Sundh A, Sjögren G. Fracture resistance of all-ceramic zirconia bridges with differing phase stabilizers and quality of sintering. Dent Mater, 2006, 22(8): 778-784.

[2] Guazzato M, Albakry M, Quach L. Influence of surface and heat treatments on the flexural strength of a glass-infiltrated alumina/zirconia-reinforced dental ceramic. Dent Mater, 2005, 21(5): 454-463.

[3] Aboushelib MN, de Jager N, Kleverlaan CJ. Microtensile bond strength of different components of core veneered all-ceramic restorations. Dent Mater, 2005, 21(10): 984-991.

[4] Raigrodski AJ, Yu A, Chiche GJ. Clinical efficacy of veneered zirconium dioxide-based posterior partial fixed dental prostheses: five-year results. J Prosthet Dent, 2012, 108(4): 214-222.

[5] Kokubo Y, Tsumita M, Sakurai S. Five-year clinical evaluation of In-Ceram crowns fabricated using GN-I (CAD/CAM) system. J Oral Rehabil, 2011, 38(8): 601-607.

[6] Ortorp A, Kihl ML, Carlsson GE. A 3-year retrospective and clinical follow-up study of zirconia single crowns performed in a private practice. J Dent, 2009, 37(9): 731-736.

[7] Etman MK, Woolford MJ. Three-year clinical evaluation of two ceramic crown systems: a preliminary study. J Prosthet Dent, 2010, 103(2): 80-90.

[8] Bindl A, Mörmann WH. Survival rate of mono-ceramic and ceramic-core CAD/CAM-generated anterior crowns over 2–5 years. Eur J Oral Sci, 2004, 112(2): 197-204.

[9] Bindl A, Lüthy H, Mörmann WH. Strength and fracture pattern of monolithic CAD/CAM-generated posterior crowns. Dent Mater, 2006, 22(1): 29-36.

[10] Sorensen JA, Cruz M, Mito WT. A clinical investigation on three-unit fixed partial dentures fabricated with a lithium disilicate glass-ceramic. Pract Periodontics Aesthet Dent, 1999, 11(1): 95-106.

[11] Sorensen JA, Choi C, Fanuscu MI. IPS Empress crown system: three-year clinical trial results. J Calif Dent Assoc, 1998, 26(2): 130-136.

[12] Tinschert J, Natt G, Mautsch W. Fracture resistance of lithium disilicate-, alumina-, and zirconia-based three-unit fixed partial dentures: a laboratory study. Int J Prosthodont, 2001, 14(3): 231-238.

[13] Rosentritt M, Preis V, Behr M. Two-body wear of dental porcelain and substructure oxide ceramics. Clin Oral Investig, 2012, 16(3): 935-943.

[14] Brewer JD, Garlapo DA, Chipps EA. Clinical discrimination between autoglazed and polished porcelain surfaces. J Prosthet Dent, 1990, 64(6): 631-634.

[15] Reis AF, Giannini M, Lovadino JR. Effects of various finishing systems on the surface roughness and staining susceptibility of packable composite resins. Dent Mater, 2003, 19(1): 12-18.

[16] Monasky GE, Taylor DF. Studies on the wear of porcelain, enamel, and gold. J Prosthet Dent, 1971, 25(3): 299-306.

[17] Guazzato M, Albakry M, Quach L. Influence of surface and heat treatments on the flexural strength of a glass-infiltrated alumina/zirconia-reinforced dental ceramic. Dent Mater, 2005, 21(5): 454-463.

[18] Williamson RT, Kovarik RE, Mitchell RJ. Effects of grinding, polishing, and overglazing on the flexure strength of a high-leucite feldspathic porcelain. Int J Prosthodont, 1996, 9(1): 30-37.

[19] Bollen CM, Lambrechts P, Quirynen M. Comparison of surface roughness of oral hard materials to the threshold surface roughness for bacterial plaque retention: a review of the literature. Dent Mater, 1997, 13(4): 258-269.

[20] Campbell SD. Evaluation of surface roughness and polishing techniques for new ceramic materials. J Prosthet Dent, 1989, 61(5): 563-568.

[21] Wright MD, Masri R, Driscoll CF. Comparison of three systems for the polishing of an ultra-low fusing dental porcelain. J Prosthet Dent, 2004, 92(5): 486-490.

[22] Patterson CJ, McLundie AC, Stirrups DR. Efficacy of a porcelain refinishing system in restoring surface finish after grinding with fine and extra-fine diamond burs. J Prosthet Dent, 1992, 68(3): 402-406.

[23] Raimondo RL Jr, Richardson JT, Wiedner B. Polished versus autoglazed dental porcelain. J Prosthet Dent, 1990, 64(5): 553-557.

[24] de Kler M, de Jager N, Meegdes M. Influence of thermal expansion mismatch and fatigue loading on phase changes in porcelain veneered Y-TZP zirconia discs. J Oral Rehabil, 2007, 34(11): 841-847.

[25] Kosmac T, Oblak C, Jevnikar P. Strength and reliability of surface treated Y-TZP dental ceramics. J Biomed Mater Res, 2000, 53(4): 304-313.

[26] Luthardt RG, Holzhüter M, Sandkuhl O. Reliability and properties of ground Y-TZP-zirconia ceramics. J Dent Res, 2002, 81(7): 487-491.

[27] Wang H, Aboushelib MN, Feilzer AJ. Strength influencing variables on CAD/CAM zirconia frameworks. Dent Mater, 2008, 24(5): 633-638.

[28] Kou W, Molin M, Sjögren G. Surface roughness of five different dental ceramic core materials after grinding and polishing. J Oral Rehabil, 2006, 33(2): 117-124.

[29] Sarikaya I, Güler AU. Effects of different polishing techniques on the surface roughness of dental porcelains. J Appl Oral Sci, 2010, 18(1): 10-16.

[30] al-Hiyasat AS, Saunders WP, Sharkey SW. Investigation of human enamel wear against four dental ceramics and gold. J Dent, 1998, 26(5/6): 487-495.

[31] Magne P, Oh WS, Pintado MR. Wear of enamel and veneering ceramics after laboratory and chairside finishing procedures. J Prosthet Dent, 1999, 82(6): 669-679.

[32] Subaşı MG, İnan Ö. Evaluation of the topographical surface changes and roughness of zirconia after different surface treatments. Lasers Med Sci, 2012, 27(4): 735-742.

[33] Curtis AR, Wright AJ, Fleming GJ. The influence of surface modification techniques on the performance of a Y-TZP dental ceramic. J Dent, 2006, 34(3): 195-206.