Enhancement of the Mechanical Properties of Hydroxyapatite/Sulphonated Poly Ether Ether Ketone Treated Layer for Orthopaedic and Dental Implant Application.

Roohollah Sharifi,Nida Iqbal,Ladan Jamshidy,Fatemeh Roozbahani,Maliheh Sadeghi,Hamid Reza Mozaffari,Seyed Mojtaba Amiri,Izman Bin Sudin,Mohammed Rafiq Abdul Kadir,Davood Almasi

doi:10.1155/2018/9607195

Abstract

The mechanical properties of coated layers are one of the important factors for the long-term success of orthopeadic and dental implants. In this study, the mechanical properties of the porous coated layer were examined via scratch and nanoindentation tests. The effect of compression load on the porous coated layer of sulphonated poly ether ether ketone/Hydroxyapatite was studied to determine whether it changes its mechanical properties. The water contact angle and surface roughness of the compressed coated layer were also measured. The results showed a significant increase in elastic modulus, with mean values ranging from 0.464 GPa to 1.199 GPa (p<0.05). The average scratch hardness also increased significantly from 69.9 MPa to 95.7 MPa after compression, but the surface roughness and wettability decreased significantly (p<0.05). Simple compression enhanced the mechanical properties of the sulphonated poly ether ether ketone/hydroxyapatite coated layer, and the desired mechanical properties for orthopaedic and dental implant application can be achieved.

Highlights

Success in orthopaedic and dental implant depends on several parameters that may be improved by considering both biologic and mechanical criteria [1]
We studied the feasibility of changing the mechanical property of the porous coated layer of sulphonated PEEK (SPEEK)/HA via compression [17]
The calculated arithmetic mean of the surface roughness obtained via atomic force microscope (AFM) for the compressed samples was 20.4, 22.2, and 20.9 nm for the 3, 5, and 10 min sulphonation times, respectively

Summary

Introduction

Success in orthopaedic and dental implant depends on several parameters that may be improved by considering both biologic and mechanical criteria [1]. The low elasticity modulus, excellent chemical stability, transparency to radio waves, and compatibility with reinforcing agents (such as carbon fiber) make poly ether ether ketone (PEEK) an ideal choice for medical applications, such as dental implants [3,4,5]. Despite these excellent properties, PEEK is still categorized as bioinert due to its very low reaction with the surrounding bone tissue [6]. The porous coated layer is a potential for bone interlocking; the modulus is expected to be relatively low for load-bearing applications such as orthopaedic and dental applications

Methods

Results

Conclusion