Bond strength of veneer ceramic and zirconia cores with different surface modifications after microwave sintering
1
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
PURPOSE. To evaluate the effects of surface treatments on shear bond strength (SBS) between microwave and conventionally sintered zirconia core/veneers. MATERIALS AND METHODS. 96 disc shaped Noritake Alliance zirconia specimens were fabricated using YenaDent CAM unit and were divided in 2 groups with respect to microwave or conventional methods (n=48/group). Surface roughness (Ra) evaluation was made with a profilometer on randomly selected microwave (n=10) and conventionally sintered (n=10) cores. Specimens were then assessed into 4 subgroups according to surface treatments applied (n=12/group). Groups for microwave (M) and conventionally (C) sintered core specimens were as follows; MC,CC: untreated (control group), M1,C1:Al2O3 sandblasting, M2,C2:liner, M3,C3:Al2O3 sandblasting followed by liner. Veneer ceramic was fired on zirconia cores and specimens were thermocycled (6000 cycles between 5°-55℃). All specimens were subjected to SBS test using a universal testing machine at 0.5 mm/min, failure were evaluated under an optical microscope. Data were statistically analyzed using Shapiro Wilk, Levene, Post-hoc Tukey HSD and Student’ t tests, Two-Way-Variance- Analysis and One-Way-Variance-Analysis (α=.05). RESULTS. Conventionally sintered specimens (1.06 ± 0.32 µm) showed rougher surfaces compared to microwave sintered ones (0.76 ± 0.32 µm)(P=.046), however, no correlation was found between SBS and surface roughness (r=-0.109, P=.658). The statistical comparison of the shear bond strengths of C3 and C1 group (P=.015); CC and MC group (P=.004) and C3 and M3 group presented statistically higher (P=.005) values. While adhesive failure was not seen in any of the groups, cohesive and combined patterns were seen in all groups. CONCLUSION. Based on the results of this in-vitro study, Al2O3- sandblasting followed by liner application on conventionally sintered zirconia cores may be preferred to enhance bond strength.
Abstract
PURPOSE. To evaluate the effects of surface treatments on shear bond strength (SBS) between microwave and conventionally sintered zirconia core/veneers. MATERIALS AND METHODS. 96 disc shaped Noritake Alliance zirconia specimens were fabricated using YenaDent CAM unit and were divided in 2 groups with respect to microwave or conventional methods (n=48/group). Surface roughness (Ra) evaluation was made with a profilometer on randomly selected microwave (n=10) and conventionally sintered (n=10) cores. Specimens were then assessed into 4 subgroups according to surface treatments applied (n=12/group). Groups for microwave (M) and conventionally (C) sintered core specimens were as follows; MC,CC: untreated (control group), M1,C1:Al2O3 sandblasting, M2,C2:liner, M3,C3:Al2O3 sandblasting followed by liner. Veneer ceramic was fired on zirconia cores and specimens were thermocycled (6000 cycles between 5°-55℃). All specimens were subjected to SBS test using a universal testing machine at 0.5 mm/min, failure were evaluated under an optical microscope. Data were statistically analyzed using Shapiro Wilk, Levene, Post-hoc Tukey HSD and Student’ t tests, Two-Way-Variance- Analysis and One-Way-Variance-Analysis (α=.05). RESULTS. Conventionally sintered specimens (1.06 ± 0.32 µm) showed rougher surfaces compared to microwave sintered ones (0.76 ± 0.32 µm)(P=.046), however, no correlation was found between SBS and surface roughness (r=-0.109, P=.658). The statistical comparison of the shear bond strengths of C3 and C1 group (P=.015); CC and MC group (P=.004) and C3 and M3 group presented statistically higher (P=.005) values. While adhesive failure was not seen in any of the groups, cohesive and combined patterns were seen in all groups. CONCLUSION. Based on the results of this in-vitro study, Al2O3- sandblasting followed by liner application on conventionally sintered zirconia cores may be preferred to enhance bond strength.
참고문헌 (35)
- Denry I, "Ceramics for dental applications: A review", Materials, 3, pp.351~368 (2010)
- Beuer F, "igh-strength CAD", CAM-fabricated veneering material sintered to zirconia copings-a new fabrication mode for all-ceramic restorations, 2009, pp.25, 121~128
- Huang SG, "Microwave sintering of CeO2 and Y2O3 co-stabilised ZrO2 from stabilisercoated nanopowders", J Eur Ceram Soc, 27, pp.689~693 (2007)
- Roy R, "Full sintering of powdered-metal bodies in a microwave field", Nature, 399, pp.668~670 (1999)
- Katz JD, "Microwave sintering of ceramics", Annu Rev Mater Sci, 22, pp.153~170 (1992)
- Ruiz L, "Effect of heat-treatment on grain size phase assemblage and mechanical properties of 3 mol% Y-TZP", J Am Ceram Soc, 79, pp.2331~2340 (1996)
- Upadhyaya DD, "Microwave sintering of zirconia ceramics", J Mater Sci, 36, pp.4707~4710 (2001)
- Deng Y, "Fracture of ceramic", ceramic, J Biomed Mater Res A, pp.2003, 67[DOI]
- Al-Dohan HM, "Shear strength of core-veneer interface in bi-layered ceramics", J Prosthet Dent, 91, pp.349~355 (2004)
- Saito A, "A comparison of bond strength of layered veneering porcelains to zirconia and metal", J Prosthet Dent, 104, pp.247~257 (2010)
- Guess PC, "Shear bond strengths between different zirconia cores and veneering ceramics and their susceptibility to thermocycling", Dent Mater, 24, pp.1556~1567 (2008)
- Guazzato M, "Strength, reliability, and mode of fracture of bilayered porcelain", core ceramics, 2004, pp.17, 142~149
- Raigrodski AJ, "The efficacy of posterior three-unit zirconium-oxide-based ceramic fixed partial dental prostheses: a prospective clinical pilot study", J Prosthet Dent, 96, pp.237~244 (2006)
- Isgrò G, "The influence of the veneering porcelain and different surface treatments on the biaxial flexural strength of a heat-pressed ceramic", J Prosthet Dent, 90, pp.465~473 (2003)
- Shehri SA, "Influence of lamination on the flexural strength of a dental castable glass ceramic", J Prosthet Dent, 76, pp.23~28 (1996)
- Özyurt Z, "In vitro evaluation of shear bond strength of veneering ceramics to zirconia", Dent Mater J, 29, pp.138~146 (2010)
- Sailer I, "Prospective clinical study of zirconia posterior fixed partial dentures: 3-year follow-up", Quintessence Int, 37, pp.685~693 (2006)
- Prasad S, "Comparison of porcelain surface and flexural strength obtained by microwave and conventional oven glazing", J Prosthet Dent, 101, pp.20~28 (2009)
- Denry I, "State of the art of zirconia for dental applications", Dent Mater, 24, pp.299~307 (2008)
- Creugers NH, "van ‹t Hof MA. A meta-analysis of durability data on conventional fixed bridges", Community Dent Oral Epidemiol, 22, pp.448~452 (1994)
- Coornaert J, "De Boever J. Long-term clinical study of porcelain-fused-to-gold restorations", J Prosthet Dent, 51, pp.338~342 (1984)
- Valderhaug J, "A 15-year clinical evaluation of fixed prosthodontics", Acta Odontol Scand, 49, pp.35~40 (1991)
- Harding AB, "The effect of surface treatment of the interfacial surface on fatigue-related microtensile bond strength of milled zirconia to veneering porce-lain", J Prosthodont, 21, pp.346~352 (2012)
- Ramin Mosharraf, "Influence of surface modification techniques on shear bond strength between different zirconia cores and veneering ceramics", The Journal of Advanced of Prosthodontics, 3(4), pp.221~228 (2011), 대한치과보철학회
- Fischer J, "Effect of zirconia surface treatments on the shear strength of zirconia", veneering ceramic composites, 2008, pp.27, 448~454
- Aboushelib MN, "Microtensile bond strength of different components of core veneered all-ceramic restorations. Part II: Zirconia veneering ceramics", Dent Mater, 22, pp.857~863 (2006)
- Aboushelib MN, "Microtensile bond strength of different components of core veneered all-ceramic restorations", Dent Mater, 21, pp.984~991 (2005)
- Guazzato M, "Influence of surface and heat treatments on the flexural strength of a glass-infiltrated alumina", zirconia-reinforced dental ceramic, 2005, pp.21, 454~463
- Çelebi N, "Effect of polymerization methods on the residual monomer level of acrylic resin denture base polymers", Polym Adv Technol, 19, pp.201~206 (2008)
- Vasconcelos LR, "Effect of chemical and microwave disinfection on the surface microhardness of acrylic resin denture teeth", J Prosthodont, 22, pp.298~303 (2013)
- Kim HJ, "Effect of zirconia surface treatments on the shear bond strength of veneering ceramic", J Prosthet Dent, 105, pp.315~322 (2011)
- DeHoff PH, "Three-dimensional finite element analysis of the shear bond test", Dent Mater, 11, pp.126~131 (1995)
- Cheung KC, "Sintering of dental porcelain: effect of time and temperature on appearance and porosity", Dent Mater, 18, pp.163~173 (2002)
- Craig RG, "Dental materials: properties and manuplation", pp.578~580 (2004), Mosby
- Sobrinho LC, "Investigation of the dry and wet fatigue properties of three all-ceramic crown systems", Int J Prosthodont, 11, pp.255~262 (1998)