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R. D. Welch, B. H. Berry, K. Crawford, H. Zhang, M. Zobitz, D. Bronson and S. Krishnan, “Subchondral Defects in Caprine Femora Aug-mented with in Situ Setting Hydroxyapatite Cement, Poly-methylmethacrylate, or Autogenous Bone Graft: Biomechani-cal and Histomorphological Analysis after Two-Years,” Jour-nal of Orthopaedic Research, Vol. 20, No. 3, 2002, pp. 464-472. doi:10.1016/S0736-0266(01)00124-3

has been cited by the following article:

• TITLE: A Study on Mechanical Properties of PMMA/Hydroxyapatite Nanocomposite

  AUTHORS: S. M. Zebarjad, S. A Sajjadi, T. Ebrahimi Sdrabadi, S. A Sajjadi, A Yaghmaei, B Naderi

  KEYWORDS: PMMA, Nano Hydroxyapatite, Mechanical Properties

  JOURNAL NAME: Engineering, Vol.3 No.8, August 12, 2011

  ABSTRACT: This study is focused on the role of nano hydroxyapatite particles on the mechanical properties of PMMA/HA nanocomposites. In order to achieve a proper and homogeneous distribution of HA particles in the polymer matrix, mixer milling process was applied. Wear, compression and three-point bending tests were conducted. It was observed that wear rate decreased by increasing in HA content in both atmosphere and artificial saliva. The results of compression tests showed that the addition of 2.5 percent HA to PMMA promoted ultimate compressive strength, yield strength and modulus while caused to decrease elongation at break. Also it was elucidated that addition of HA more than 2.5 wt.% caused a decrease in both ultimate compressive strength and compression yield strength and an increase in elongation at break. The results of three-point bending tests on the PMMA cements containing 2.5 percent HA demonstrated the maximum bending strength value and modulus among all the HA containing formulations. However there was no direct proportionality between the results of bending tests and the HA content and the addition of HA to PMMA (up to 10 wt.%) did not change the bending properties significantly.