Flexural Strength of PEEK (Poly-Ether-Ether-Ketone) Coated by Hydroxyapatite 34,5% as Dental Implant Material
Chaterina Diyah Nanik Kusumawardani,1 Dhea Putri Ayunda Salam,2 I.G.A.M Oka Lestari,3

1 Prosthodontics Department, Faculty of Dentistry, Universitas Hang Tuah Surabaya
2 Undergraduate student, Faculty of Dentistry, Universitas Hang Tuah Surabaya
3Graduate Student of Dental Health Science, Faculty of Dental Medicine, Universitas Airlangga Surabaya

Abstract

Background: PEEK (Poly-Ether-Ether-Ketone) has been known as an alternative to implant materials due to its mechanical properties such as low modulus elasticity (3-4 GPa) which resembles human cortical bone. Modification of PEEK with hydroxyapatite (HA) is intended to improve the osseointegration characteristic. Flexural strength as one of the dental implant mechanical properties to withstand the masticatory load needs to be studied. Objective: Study the flexural strength of Poly-Ether-Ether-Ketone with and without hydroxyapatite 34.5% coating. Methods: There were 16 samples of PEEK plates divided into 2 groups, namely the control group (K group) and the treatment Group (P group). K group samples were not coated by HA, while the P group was coated by 34.5%HA. HA coating technique was done using a spin coating method, then dried at room temperature for 24 hours. Flexural strength tests were carried out by a Universal Testing Machine at a speed of 1mm perminute. Data obtained was then analyzed by paired T-test. Results: The flexural strength of PEEK coated by 34.5% HA was 175 plusminus 6.245 MPa, on the other hand, non-coated PEEK showed a flexural strength value of 173 plusminus 17.243 MPa. Conclusion: It can be concluded that there is no significant difference in flexural strength in both groups. HA coating on PEEK material did not affect the flexural strength of PEEK.

Keywords: Dental Implant, Flexural Strength, Hydroxyapatite, PEEK

Topic: Prosthodontics