A New Ti-5Ag Alloy for Customized Prostheses by Three-dimensional Printing (3DP™)

Abstract

Three important considerations in the fabrication of customized cranio-maxillofacial prostheses are geometric precision, material strength, and biocompatibility. Three-dimensional printing (3DP™) is a rapid part-fabrication process that can produce complex parts with high precision. The aim of this study was to design, synthesize by 3DP™, and characterize a new Ti-5Ag (wt%) alloy. Silver nitrate was found to be an appropriate inorganic binder for the Ti powder-based skeleton, and the optimum sintering parameters for full densification were determined. The hardness of the Ti-5Ag alloy was shown to be much higher than that of a pure titanium sample. Potentiodynamic measurements, carried out in saline solution at body temperature, showed that the Ti-5Ag alloy had good passivation behavior, similar to that of pure titanium. It is concluded that the Ti-Ag system may be suitable for fabrication of customized prostheses by 3DP™.

Keywords

prostheses three-dimensional printing (3DP™)Ti-based alloys corrosion.

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References

Astm (1999). Standard practice for determining the inclusion or second-phase constituent content of metals by automatic image analysis. ASTM E 1245-95. In: 1999 annual book of ASTM standards. Vol. 03.01. West Conshohocken, PA: American Society for Testing and Materials.

Astm (2000). Standard test method for flow rate of metal powders. ASTM B 213-97. In: Annual book of ASTM standards 2000. Vol. 02.05. West Conshohocken, PA: American Society for Testing and Materials.

Binder WJ , Kaye A. ( 1994). Reconstruction of post-traumatic and congenital facial deformities with three-dimensional computer-assisted custom-designed implants . Plast Reconstr Surg 94:775-787.

Chandler CL , Uttley D. , Archer DJ , MacVicar D. (1994). Imaging after titanium cranioplasty. Br J Neurosurg 8:409-414.

Guo H. (1998). Alloy design for three-dimensional printing of hardenable tool materials (dissertation). Cambridge, MA : Massachusetts Institute of Technology.

Hong SB ( 2000). Individualized cranio-maxillo-facial prosthesis construction using three-dimensional printing (3DP™) with atomized titanium powder (dissertation). Boston, MA: Harvard School of Dental Medicine.

Jones DA (1996). Principles and prevention of corrosion. 2nd ed. Upper Saddle River, NJ: Prentice-Hall.

Sachs E. , Cima M. , Bredt J. , Curodeau A. (1992a). CAD-casting: the direct fabrication of ceramic shells and cores by three-dimensional printing. ManufRev 5:118-126.

Sachs E. , Cima M. , Williams P. , Brancazio D. , Cornie J. (1992b). Three-dimensional printing: rapid tooling and prototypes directly from a CAD model. J Eng Indust 114:481-488.

10.

Sachs E. , Haggerty J. , Williams P. , Cima M. ( 1993). Three dimensional printing techniques. US Patent 5,204,055. April 20.

11.

Sullivan PK , Smith JF , Rozzelle AA (1994). Cranio-orbital reconstruction: safety and image quality of metallic implants on CT and MRI scanning. Plast Reconstr Surg 94:589-596.

12.

Toth BA , Ellis DS , Stewart WB (1988). Computer-designed prostheses for orbito-cranial reconstruction. Plast Reconstr Surg 81:315-324.