Share This Article:

Analysis of Deformation in Ni-Cr Structures with New and Recast Alloys

Full-Text HTML XML Download Download as PDF (Size:967KB) PP. 707-712
DOI: 10.4236/msa.2015.67072    2,827 Downloads   3,137 Views  

ABSTRACT

The present study analyzed new and recast Ni-Cr alloys, regarding the relationship between the applied force and the deformation in cantilevered bar segments, with dimensions of 4.0 mm, 3.5 mm, 3.0 mm in thickness, 4.5 mm width and 15 mm length, on a universal testing machine “EMIC”. The bars in the tests were initially obtained acrylic resin by 4.8 mm wide × 4.3 mm thick × 4 cm long. We obtained 30 bars divided into two groups, with 15 to test new alloys and 15 with alloys recast. The alloy used was Tilite. For the application of the load, the bars were attached to “EMIC” where the active tip of 200 kgf load cell was at a specific point of the bar (15 mm) with a speed of 0.5 mm per minute. The data showed statistically significant differences in relation to alloys and thickness among the bars, and all thicknesses evaluated were different. Thus, it was concluded that there was statistically significant difference between the groups and their variables, and that the alloys recast could be reused at least 1 time, without loss of properties.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Filho, H. , Goiato, M. , Mazaro, J. and Túrcio, K. (2015) Analysis of Deformation in Ni-Cr Structures with New and Recast Alloys. Materials Sciences and Applications, 6, 707-712. doi: 10.4236/msa.2015.67072.

References

[1] Zarb, G.A., Jansson, T. and Jemt, T. (1985) Other Prosthodontic Applications. In Branemark, P.I., Zarb, G.A. and Albrektsson, T., Eds., Tissue Integrated Prostheses: Osseointegration in Clinical Dentistry, Quintessence, Chicago, 283-287.
[2] Smyd, E.S. (1952) Mechanics of Dental Structures: Guide to Teaching Dental Engineering at Undergraduate Level. Journal of Prosthetic Dentistry, 2, 668-693.
http://dx.doi.org/10.1016/S0022-3913(52)80045-9
[3] Rodrigues, A.M., Aquilino, S.A., Lund, P.S., Ryther, J.S. and Southard, T.E. (1993) Evaluation of Strain at the Terminal Abutment Site of a Fixed Mandibular Implant Prosthesis during Cantilever Loading. Journal of Prosthodontics, 2, 93-102.
http://dx.doi.org/10.1111/j.1532-849X.1993.tb00389.x
[4] Stewart, R.B. and Staab, G.H. (1995) Cross-Sectional Design and Fatigue Durability of Catilevered Sections of Fixed Implant-Supported Prostheses. Journal of Prosthodontics, 4, 188-194.
http://dx.doi.org/10.1111/j.1532-849X.1995.tb00339.x
[5] Staab, G.H. and Stewart, R.B. (1994) Theoretical Assessment of Cross-Section for Cantilevered Implant-Supported Prostheses. Journal of Prosthodontics, 3, 23-30.
http://dx.doi.org/10.1111/j.1532-849X.1994.tb00121.x
[6] Gallucci, G.O., Doughtied, C.B., Hwangh, J.W., Fiorellini, J.P. and Weber, H.P. (2009) Five-Year Results of Fixed Implant Supported Rehabilitations with Distal Cantilevers for the Edentulous Mandible. Clinical Oral Implants Research, 20, 601-607.
[7] Fernandes, D.R. (2005) Influence of Remelting of an Alloy of Ni-Cr Cervical Adaptation and Internal Crowns with Different Configurations. Ph.D. Thesis, Piracicaba School of Dentistry, State University of Campinas, Campinas.
[8] Vilar, C.D. (2008) Influence of the Number of Recast Alloy Cr-Ni-Ti-M0 on the Properties of Metal-Ceramic Prosthesis. Ph.D. Thesis, Universidade Federal do Rio Grande do Norte, Natal.
[9] Aglieta, M., Siciliano, V.I., Zwhlen, M., Bragger, U., Pjetursson, B.E., Lang, N.P. and Salvi, G.E. (2009) A Systematic Review of the Survival and Complication Rates of Implant Supported Fixed Dental Prostheses with Cantilever Extensions after an Observation Period of at Least 5 Years. Clinical Oral Implants Research, 20, 441-451.
http://dx.doi.org/10.1111/j.1600-0501.2009.01706.x
[10] Mc Alarney, M.E. and Stavropoulos, D.N. (2000) Theoretical Cantilever Lengths versus Clinical Variables in Fifty-Five Clinical Cases. Journal of Prosthetic Dentistry, 83, 332-343.
http://dx.doi.org/10.1016/S0022-3913(00)70137-5
[11] Huang, H.H., Lin, M.C., Lee, T.H., Yang, H.W., Chen, F.L., Wu, S.C. and Hsu, C.C. (2005) Effect of Chemical Composition of Ni-Cr Dental Casting Alloys on the Bonding Characterization between Porcelain and Metal. Journal of Oral Rehabilitation, 32, 206-212.
http://dx.doi.org/10.1111/j.1365-2842.2004.01411.x
[12] Nathanson, D. (1996) Principles of Use Porcelain as a Material for Inlay/Onlay. In: Garber, D.A. and Goldstein, R.E., Eds., Inlays and Onlays, Porcelain and Composite Resin, Quintessence, Chicago.
[13] Kumar, N.S. and Chandra, T.S. (2008) Evaluation of Variations in Composition, Corrosion Behavior and Surface Hardness on Reusing a Co-Cr-Mo Denture Alloy. The Journal of Indian Prosthodontic Society, 8, 22-26.
http://dx.doi.org/10.4103/0972-4052.43249
[14] Mirković, N. (2007) Effect of Recasting on the Elastic Modulus of Metal-Ceramic Systems from Nickel-Chromium and Cobalt-Chromium Alloys. Vojnosanitetski Pregled, 64, 469-473.
http://dx.doi.org/10.2298/VSP0707469M

  
comments powered by Disqus

Copyright © 2018 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.