THE MANUFACTURING PRECISION OF DENTAL CROWNS BY TWO DIFFERENT METHODS IS COMPARABLE
Like all production areas the production of dental replacements, either prosthetic or aesthetic, has recently undergone great advancement due to computer-aided design of dental parts and their computer aided manufacturing. CNC milling, which belongs to the group of subtractive production methods, is very well established in dental production. For the last several years, methods of additive manufacturing, such as Selective Laser Melting (SLM), Selective Laser Sintering (SLS) and Direct Metal Laser Sintering (DMLS), have gone mainstream. In general, both additive and subtractive methods have their technological pros and cons; therefore, the aim of this paper is to determine how accurate in terms of tolerance of production of ± 50 μm both technologies are and afterwards to determine which of the technologies is more accurate. Given that nowadays the most commonly used material in the dental area is cobalt-chromium (Co-Cr) alloy, this alloy was chosen for the experiment. Thirty Co-Cr dental crowns were manufactured for analysis according to the referential CAD model, 15 by CNC milling and 15 by SLM. The crowns were subsequently scanned using a dental 3D scanner, and their inner areas were extracted and compared to the nominal CAD model. The percentage agreement of production is on the level of approximately 94% with both devices, and the average value of agreement as well as the standard deviation and range variation are better with additive production.
Keywords:
additive method, subtractive method, cobalt-chromium, reference model, internal surfaces
Autoři:
Viktória Rajťúková 1; Irenej Poláček 1; Teodor Tóth 1; Jozef Živčák 1; Gabriela Ižáriková 2; Mila Kovačevic 3; Andrej Somoš 4; Radovan Hudák 1
Působiště autorů:
Department of Biomedical Engineering and Measurement, Faculty of Mechanical Engineering, Technical University of Kosice, Slovakia
1; Department of Appl. Mathematics and Informatics, Faculty of Mechanical Engineering
Technical University of Kosice, Slovakia
2; Faculty of Medicine, University of Novi Sad, Serbia
3; Department of Pneumology and Phtiseology, Louis Pasteur University Hospital, Košice, Slovakia
4
Vyšlo v časopise:
Lékař a technika - Clinician and Technology No. 4, 2016, 46, 102-106
Kategorie:
Původní práce
Souhrn
Like all production areas the production of dental replacements, either prosthetic or aesthetic, has recently undergone great advancement due to computer-aided design of dental parts and their computer aided manufacturing. CNC milling, which belongs to the group of subtractive production methods, is very well established in dental production. For the last several years, methods of additive manufacturing, such as Selective Laser Melting (SLM), Selective Laser Sintering (SLS) and Direct Metal Laser Sintering (DMLS), have gone mainstream. In general, both additive and subtractive methods have their technological pros and cons; therefore, the aim of this paper is to determine how accurate in terms of tolerance of production of ± 50 μm both technologies are and afterwards to determine which of the technologies is more accurate. Given that nowadays the most commonly used material in the dental area is cobalt-chromium (Co-Cr) alloy, this alloy was chosen for the experiment. Thirty Co-Cr dental crowns were manufactured for analysis according to the referential CAD model, 15 by CNC milling and 15 by SLM. The crowns were subsequently scanned using a dental 3D scanner, and their inner areas were extracted and compared to the nominal CAD model. The percentage agreement of production is on the level of approximately 94% with both devices, and the average value of agreement as well as the standard deviation and range variation are better with additive production.
Keywords:
additive method, subtractive method, cobalt-chromium, reference model, internal surfaces
Zdroje
[1] Noort, R: The future of dental devices is digital. Dent Mater 2012; ISSN 0957-4530, 28:3–12.
[2] Samet, N., Resheff, B., Gelbard, S., Stern, N.: A CAD/CAM system for the production of metal copings for porcelain-fused-to-metal restorations. J Prosthet Dent, ISSN 0022-3913, 73 (1995), pp. 457–463.
[3] Quante, K., Ludwig, K., Kern, M.: Marginal and internal fit of metal–ceramic crowns fabricated with a new laser melting technology. Dent Mater, 24 (2008), ISSN 0109-5641, pp.
1311–1315.
[4] Traini, T., Mangano, C., Sammons, R.L., Mangano, F., Macchi, A., Piattelli, A.: Direct laser metal sintering as a new approach to fabrication of an isoelastic functionally graded material for manufacture of porous titanium dental implants. Dent Mater, 24 (2008), ISSN: 0957-4530, pp. 1525–1533.
[5] Amann Girbach, [online 11.05.2016] https://www.amanngirrbach.com/en/products/milling-cam/ceramill-motion-2-5x/
[6] Yadroitsev, I., Bertrand, P.H., & Smurov, I. (2007). Parametric, analysis of the selective laser melting process. Applied Surface Science, 253, 8064–8069.
[7] Jenča, A., Jenčová, J., Jenča, A. ml., Jenčová V.: Dentálny implantát a efektivita remodelácie ortognátneho systému. In: Seminar Sučasti technologii v stomatologii: Užgorod: Prat "Vydavnyctvo Zakarpattja", 2012. - S. 49–55.
[8] Mazzoli, A: Selective laser sintering in biomedical engineering. Med Biol Eng Comput 2013; 51:245-56.
[9] Kumar, S: Selective laser sintering: a qualitative and objective approach. Jom-J Min Met Mat S 2003; 55:43–47.
[10] Xin, X.Z., Chen, J., Xiang, N., Wei, B.: Surface properties and corrosion behavior of Co-Cr alloy fabricated with selective laser melting technique. Cell Biochem Biophys 2013; 67:983–90, ISSN: 1085–9195.
[11] Concept laser, dental machines, [online 11.05.2016]. http://www.concept-laser.de/en/industry/dental/machines.html.
[12] Hughes, Kate: A 3D printed future. Inside Dental Technology [online 11.05.2016] http://www.dentalaegis.com/idt/2013/04
[13] Choi, Y.J., Koak, J.Y., Heo, S.J., Kim, S.K., Ahn, J.S., Park, D.S.: Comparison of the mechanical properties and micro-structures of fractured surface for Co-Cr alloy fabricated by conventional cast, 3-D printing laser-sintered and CAD/CAM milled techniques. J Korean Acad Prosthodont. 2014 Apr; 52(2):67–73.
[14] Ucar, Y., Akova, T., Akyil, M.S., et al: Internal fit evaluation ofcrowns prepared using a new dental crown fabrication tech-nique: laser-sintered Co-Cr crowns. J Prosthet Dent 2009; ISSN: 0022-3913, 102:253–259.
[15] Örtorp, A., Jönsson, D., Mouhsen, A., Vult von Steyern, P.: The fit of cobalt–chromium three-unit fixed dental prostheses fabricated with four different techniques: A comparative in vitro study, Dental Materials, Volume 27, Issue 4, April 2011, Pages 356–363, ISSN 0109-5641.
[16] Jenča, A., Jenčová, V., Jenčová, J., Jenča A. ml.: Dentálny implantát a jeho osteointegrácia ako náhrada piliera, In: Implantológia a pokročilé implantáty : zborník referátov: Košice, 28.11.2011. - Košice: Univerzita Pavla Jozefa Šafárika v Košiciach, 2011. - ISBN 9788097096410. - S. 172–179.
[17] Koutsoukis, T., Zinelis, S., Eliades, G., Al-Wazzan, K., Rifaiy, M. A. and Al Jabbari, Y. S. (2015): Selective Laser Melting Technique of Co-Cr Dental Alloys: A Review of Structure and Properties and Comparative Analysis with Other Available Techniques. Journal of Prosthodontics, ISSN 2005-7806,
24: 303–312. doi:10.1111/jopr.12268.
[18] Kruth, J.P., Mercelis, P., Van Vaerenbergh, J., et al: Binding mechanisms in selective laser sintering and selective laser melting. Rapid Prototyping J, ISSN 1355-2546, 2005; 11:26–36.
[19] Yamanaka, K., Mori, M., Kuramoto, K., et al: Development of new Co-Cr-W-based biomedical alloys: effects of micro alloying and thermomechanical processing on microstructures and mechanical properties. Mater Des 2014; ISSN 0264-1275, 55:987–998.
[20] Takaichi, A., Suyalatu, Nakamoto, T., et al: Microstructures and mechanical properties of Co-29Cr-6Mo alloy fabricated by selective laser melting process for dental applications. J MechBehav Biomed Mater 2013; ISSN 0957-4530, 21:67–76.
[21] Munoz, A.I., Mischler, S.: Effect of the environment on wear ranking and corrosion of biomedical CoCrMo alloys. J Mater SciMater Med, ISSN 0957-4530, 2011; 22:437–45.
[22] Reclaru, L., Ardelean, L., Rusu, L., et al: Co-Cr material selection in prosthetic restoration: Laser sintering Technology. Solid State Phenomena 2012; ISSN 1662-9779, 188:412–415.
[23] Rodrigues, W.C., Broilo, L.R., Schaeffer, L., et al: Powder metallurgical processing of Co-28%Cr-6%Mo for dental implants: physical, mechanical and electrochemical properties. Powder Technol 2011; ISS: 0032-5910, 206:233–23.
[24] Kim, K.B., Kim, J.H., Kim, W.C., et al: Evaluation of the marginal and internal gap of metal-ceramic crown fabricated with a selective laser sintering technology: two- and three-dimensional replica techniques. J Adv Prosthodont 2013;5:179-186, ISSN 2005-7806.
[25] Roberts, H.W., Berzins, D.W., Moore, B.K., et al: Metal-ceramic alloys in dentistry: a review. J Prosthodont 2009;18:
ISSN 1532-849X 188-19448.
[26] Akova, T., Ucar, Y., Tukay, A., Balkaya, M.C., Brantley, W.A.: Comparison of the bond strength of laser-sintered and cast base metal dental alloys to porcelain, Dent Mater, 24 (2008), pp. 1400–1404.
Štítky
BiomedicínaČlánok vyšiel v časopise
Lékař a technika
2016 Číslo 4
Najčítanejšie v tomto čísle
- CARDIOPULMONARY EXERCISE TESTING FOR VO2MAX DETERMINING IN SUBJECTS OF DIFFERENT PHYSICAL ACTIVITY
- THE MANUFACTURING PRECISION OF DENTAL CROWNS BY TWO DIFFERENT METHODS IS COMPARABLE
- COMBINATION OF ATOMIC FORCE MICROSCOPY AND COMET ASSAY FOR ANALYSIS OF DNA DAMAGE INDUCED BY PDT