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4908 |
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Plasma sprayed bioceramic coatings on polymer orthopedic implants |
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Laura Barillas* / Instituto Tecnológico de Costa Rica, Costa Rica Jorge M. Cubero-Sesin / Instituto Tecnologico de Costa Rica, Costa Rica Teodolito Guillen-Giron/ Instituto Tecnologico de Costa Rica, Costa Rica |
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New manufacturing and materials processing techniques and technologies mainly 3D printing, have allowed a wide range of medical devices to change from expensive and generic (devices where "one size fits all"), to customized and more affordable options. Polymers can play an important role in the new processing methods due to weight, cost and performance for medical devices [1]. These materials are applied in orthopedic implants, tissue engineering and spinal surgery, e.g. spinal cages for intervertebral disk replacement [2]. It is widely sought for the devices to support bone in-grow and to enhance the osseointegration with the remaining bone or tissue structure. In order to accomplish this purpose, these medical devices can be coated with bioceramics, such as hydroxyapatite (HA). Among different thermal spray techniques, plasma spraying is the most widely used technology for surfacing implants with highly osteointegrating coatings [3]. Nevertheless, plasma sprayed HA coatings have been primarily applied to metallic substrates, and unfortunately, only a few studies are available on polymers and composite materials [4]. The purpose of this work is to present preliminary results on plasma sprayed HA coatings on 3D printed polymer substrates e.g. PEEK, PLA, PLGA and PVA, which present potential for applications in the customized orthopedic industry. [1] L. W. McKeen, Plastics Used in Medical Devices, in Handbook of Polymer Applications in Medicine and Medical Devices, Sina Ebnes., Elsevier Inc., 2014, pp. 2153. [2] P. Robotti, G. Zappini, and S. M. Kurtz, Thermal Plasma Spray Deposition of Titanium and Hydroxyapatite on Polyaryletheretherketone Implants in PEEK Biomaterials Handbook, 1st ed., Massachussets: Elsevier Inc., 2012, pp. 119143. [3] P. Robotti, G. Zappini, and S. M. Kurtz, Thermal Plasma Spray Deposition of Titanium and Hydroxyapatite on Polyaryletheretherketone Implants in PEEK Biomaterials Handbook, 1st ed., Massachussets: Elsevier Inc., 2012, pp. 119143. [4] S. Beauvais and O. Decaux, Plasma Sprayed Biocompatible Coatings on PEEK Implants, Therm. Spray 2007 Glob. Coat. Solut., pp. 371377, 2007. |