Application of laser engineered net shaping (LENS) to manufacture porous and functionally graded structures for load bearing implants

Amit Bandyopadhyay; B V Krishna; Weichang Xue; Susmita Bose

doi:10.1007/s10856-008-3478-2

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Application of laser engineered net shaping (LENS) to manufacture porous and functionally graded structures for load bearing implants

Journal article

Peer reviewed

Application of laser engineered net shaping (LENS) to manufacture porous and functionally graded structures for load bearing implants

Amit Bandyopadhyay, B V Krishna, Weichang Xue and Susmita Bose

Journal of materials science. Materials in medicine, Vol.20 Suppl 1(S1), pp.S29-34

12/2009

DOI: https://doi.org/10.1007/s10856-008-3478-2

Handle:

https://hdl.handle.net/2376/113406

PMID: 18521725

Abstract

Coated Materials, Biocompatible - chemical synthesis

Coated Materials, Biocompatible - pharmacology

Titanium - chemistry

Coated Materials, Biocompatible - chemistry

Prostheses and Implants

Stress, Mechanical

Materials Testing

Compressive Strength

Alloys - chemistry

Lasers

Models, Biological

Surface Properties

Weight-Bearing

Bone Substitutes - chemical synthesis

Porosity

Chemical Engineering - methods

Bone Substitutes - chemistry

Fabrication of net shape load bearing implants with complex anatomical shapes to meet desired mechanical and biological performance is still a challenge. In this article, an overview of our research activities is discussed focusing on application of Laser Engineered Net Shaping (LENS) toward load bearing implants to increase in vivo life time. We have demonstrated that LENS can fabricate net shape, complex metallic implants with designed porosities up to 70 vol.% to reduce stress-shielding. The effective modulus of Ti, NiTi, and other alloys was tailored to suit the modulus of human cortical bone by introducing 12-42 vol.% porosity. In addition, laser processed porous NiTi alloy samples show a 2-4% recoverable strain, a potentially significant result for load bearing implants. To minimize the wear induced osteolysis, unitized structures with functionally graded Co-Cr-Mo coating on porous Ti6Al4V were also made using LENS, which showed high hardness with excellent bone cell-materials interactions. Finally, LENS is also being used to fabricate porous, net shape implants with a functional gradation in porosity characteristics.

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Title: Application of laser engineered net shaping (LENS) to manufacture porous and functionally graded structures for load bearing implants
Creators: Amit Bandyopadhyay - W. M. Keck Biomedical Materials Research Lab, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USA. amitband@wsu.edu
B V Krishna
Weichang Xue
Susmita Bose
Publication Details: Journal of materials science. Materials in medicine, Vol.20 Suppl 1(S1), pp.S29-34
Academic Unit: Mechanical and Materials Engineering, School of
Publisher: United States
Identifiers: 99900547502901842
Language: English
Resource Type: Journal article

Application of laser engineered net shaping (LENS) to manufacture porous and functionally graded structures for load bearing implants

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