Evaluation of marginal and internal gaps of Ni-Cr and Co-Cr alloy copings manufactured by microstereolithography
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
PURPOSE. The purpose of this study was to evaluate the marginal and internal gaps of Ni-Cr and Co-Cr copings, fabricated using the dental μ-SLA system. MATERIALS AND METHODS. Ten study dies were made using a twostep silicone impression with a dental stone (type IV) from the master die of a tooth. Ni-Cr (NC group) and Co-Cr (CC group) alloy copings were designed using a dental scanner, CAD software, resin coping, and casting process. In addition, 10 Ni-Cr alloy copings were manufactured using the lost-wax technique (LW group). The marginal and internal gaps in the 3 groups were measured using a digital microscope (160 ×) with the silicone replica technique, and the obtained data were analyzed using the non-parametric Kruskal-Wallis H test. Post-hoc comparisons were performed using Bonferroni-corrected Mann-Whitney U tests (α=.05). RESULTS. The mean (± standard deviation) values of the marginal, chamfer, axial wall, and occlusal gaps in the 3 groups were as follows: 81.5±73.8, 98.1±76.1, 87.1±44.8, and 146.8±78.7 μm in the LW group; 76.8±48.0, 141.7±57.1, 80.7±47.5, and 194.69±63.8 μm in the NC group; and 124.2±52.0, 199.5±71.0, 67.1±37.6, and 244.5±58.9 μm in the CC group. CONCLUSION. The marginal gap in the LW and NC groups were clinically acceptable. Further improvement is needed for CC group to be used clinical practice.
Abstract
PURPOSE. The purpose of this study was to evaluate the marginal and internal gaps of Ni-Cr and Co-Cr copings, fabricated using the dental μ-SLA system. MATERIALS AND METHODS. Ten study dies were made using a twostep silicone impression with a dental stone (type IV) from the master die of a tooth. Ni-Cr (NC group) and Co-Cr (CC group) alloy copings were designed using a dental scanner, CAD software, resin coping, and casting process. In addition, 10 Ni-Cr alloy copings were manufactured using the lost-wax technique (LW group). The marginal and internal gaps in the 3 groups were measured using a digital microscope (160 ×) with the silicone replica technique, and the obtained data were analyzed using the non-parametric Kruskal-Wallis H test. Post-hoc comparisons were performed using Bonferroni-corrected Mann-Whitney U tests (α=.05). RESULTS. The mean (± standard deviation) values of the marginal, chamfer, axial wall, and occlusal gaps in the 3 groups were as follows: 81.5±73.8, 98.1±76.1, 87.1±44.8, and 146.8±78.7 μm in the LW group; 76.8±48.0, 141.7±57.1, 80.7±47.5, and 194.69±63.8 μm in the NC group; and 124.2±52.0, 199.5±71.0, 67.1±37.6, and 244.5±58.9 μm in the CC group. CONCLUSION. The marginal gap in the LW and NC groups were clinically acceptable. Further improvement is needed for CC group to be used clinical practice.
참고문헌 (34)
- Konstantoulakis E, "Marginal fit and surface roughness of crowns made with an accelerated casting technique", J Prosthet Dent, 80, pp.337~345 (1998)
- Tao J, "Fit of metal ceramic crowns cast in Au-1.6 wt% Ti alloy for different abutment finish line curvature", Dent Mater, 22, pp.397~404 (2006)
- Ucar Y, "Internal fit evaluation of crowns prepared using a new dental crown fabrication technique: laser-sintered Co-Cr crowns", J Prosthet Dent, 102, pp.253~259 (2009)
- Duret F, "CAD-CAM in dentistry", J Am Dent Assoc, 117, pp.715~720 (1988)
- Miyazaki T, "A review of dental CAD", CAM: current status and future perspectives from 20 years of experience, 2009, pp.28, 44~56
- Davis DR, "Limiting wax pattern distortion caused by setting expansion", J Prosthet Dent, 58, pp.229~234 (1987)
- van Noort R, "The future of dental devices is digital", Dent Mater, 28, pp.3~12 (2012)
- Kim CM, "Trueness of milled prostheses according to number of ball-end mill burs", J Prosthet Dent, 115, pp.624~629 (2016)
- Örtorp A, "The fit of cobalt-chromium three-unit fixed dental prostheses fabricated with four different techniques: a comparative in vitro study", Dent Mater, 27, pp.356~363 (2011)
- Huang SH, "Additive manufacturing and its societal impact: a literature review", Int J Adv Manuf Technol, 67, pp.1191~1203 (2013)
- 박진영, "Comparison of prosthetic models produced by traditional and additive manufacturing methods", The Journal of Advanced of Prosthodontics, 7(4), pp.294~302 (2015), 대한치과보철학회[DOI]
- Lee IH, "Micro-stereolithography photopolymer solidification patterns for various laser beam exposure conditions", Int J Adv Manuf Technol, 22, pp.410~416 (2003)
- Akova T, "Comparison of the bond strength of laser-sintered and cast base metal dental alloys to porcelain", Dent Mater, 24, pp.1400~1404 (2008)
- Kim KB, "An evaluation of marginal fit of three-unit fixed dental prostheses fabricated by direct metal laser sintering system", Dent Mater, 29, pp.e91~e96 (2013)
- Furst A, "New developments in the study of metal carcinogenesis", J Environ Sci Health Part C, 2, pp.103~133 (1984)
- Lu Y, "Nickel-based (Ni-Cr and Ni-Cr-Be) alloys used in dental restorations may be a potential cause for immune-mediated hypersensitivity", Med Hypotheses, 73, pp.716~717 (2009)
- Reclaru L, "Ni-Cr based dental alloys;Ni release, corrosion and biological evaluation", Mater Sci Eng C Mater Biol Appl, 32, pp.1452~1460 (2012)
- Pradíes G, "Clinical evaluation comparing the fit of all-ceramic crowns obtained from silicone and digital intraoral impressions based on wavefront sampling technology", J Dent, 43, pp.201~208 (2015)
- Aktas G, "Effect of digitizing techniques on the fit of implant-retained crowns with different antirotational abutment features", J Prosthet Dent, 111, pp.367~372 (2014)
- Chazine M, "Interfacial nanoleakage and internal cement thickness of three esthetic crown systems", Dent Mater, 28, pp.1105~1111 (2012)
- Beuer F, "Marginal and internal fits of fixed dental prostheses zirconia retainers", Dent Mater, 25, pp.94~102 (2009)
- Karlsson S, "The fit of Procera titanium crowns. An in vitro and clinical study", Acta Odontol Scand, 51, pp.129~134 (1993)
- McLean JW, "The estimation of cement film thickness by an in vivo technique", Br Dent J, 131, pp.107~111 (1971)
- Fransson B, "The fit of metal-ceramic crowns, a clinical study", Dent Mater, 1, pp.197~199 (1985)
- Syrek A, "Clinical evaluation of all-ceramic crowns fabricated from intraoral digital impressions based on the principle of active wavefront sampling", J Dent, 38, pp.553~559 (2010)
- Boening KW, "Non-cast titanium restorations in fixed prosthodontics", J Oral Rehabil, 19, pp.281~287 (1992)
- Jacobs MS, "An investigation of dental luting cement solubility as a function of the marginal gap", J Prosthet Dent, 65, pp.436~442 (1991)
- Kokubo Y, "Clinical marginal and internal gaps of zirconia all-ceramic crowns", J Prosthodont Res, 55, pp.40~43 (2011)
- Elshahawy W, "Marginal accuracy in casting titanium fixed partial dentures", Tanta Dent J, 12, pp.119~123 (2015)
- Singh V, "Marginal accuracy of metal copings produced with different ring casting techniques:An in vitro study", Eur J Prosthodont, 3, pp.36~41 (2015)
- Molin M, "The fit of gold inlays and three ceramic inlay systems. A clinical and in vitro study", Acta Odontol Scand, 51, pp.201~206 (1993)
- Grenade C, "Fit of single tooth zirconia copings: comparison between various manufacturing processes", J Prosthet Dent, 105, pp.249~ (2011)
- de Torres EM, "The effect of commercially pure titanium and alternative dental alloys on the marginal fit of one-piece cast implant frameworks", J Dent, 35, pp.800~805 (2007)
- Hutton JE, "The expansion of phosphate bonded investments: Part I-Setting expansion", J Prosthet Dent, 70, pp.121~125 (1993)