PMID- 2708405
OWN - NLM
STAT- MEDLINE
DCOM- 19890602
LR  - 20081121
IS  - 0021-9304 (Print)
IS  - 0021-9304 (Linking)
VI  - 23
IP  - 1
DP  - 1989 Jan
TI  - Elastic and ultimate properties of acrylic bone cement reinforced with 
      ultra-high-molecular-weight polyethylene fibers.
PG  - 63-80
AB  - A study of the fracture behavior of poly-(methyl methacrylate) (PMMA) bone cement 
      reinforced with short ultra-high-molecular-weight polyethylene (Spectra 900) 
      fibers is presented. Linear elastic and nonlinear elastic fracture mechanics 
      results indicate that a significant reinforcing effect is obtained at fiber 
      contents as low as 1% by weight, but beyond that concentration a plateau value is 
      reached and the fracture toughness becomes insensitive to fiber content. The 
      flexural strength and modulus are apparently not improved by the incorporation of 
      polyethylene fibers in the acrylic cement, probably because of the presence of 
      voids, the poor mixing practice and the weakness of the fiber/matrix interfacial 
      bond. The present polyethylene/PMMA composite presents several advantages as 
      compared to other composite cements, but overall the mechanical performance of 
      this system resembles that of Kevlar 29/PMMA cement, with a few differences. 
      Scanning electron microscopy reveals characteristic micromechanisms of energy 
      absorption in Spectra 900/PMMA bone cement. A scheme for the strength of random 
      fiber-reinforced composites, which is a simple extension of the Kelly and Tyson 
      model for the strength of unidirectional composites, is presented and discussed. 
      Young's modulus and the fracture toughness results are discussed in the framework 
      of existing theories. More fundamental modeling treatments are needed in terms of 
      fracture micromechanisms to understand and optimize the various mechanical 
      properties with respect to structural parameters and cement preparation 
      technique.
FAU - Pourdeyhimi, B
AU  - Pourdeyhimi B
AD  - Department of Textiles and Consumer Economics, University of Maryland, College 
      Park 20742.
FAU - Wagner, H D
AU  - Wagner HD
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Biomed Mater Res
JT  - Journal of biomedical materials research
JID - 0112726
RN  - 0 (Bone Cements)
RN  - 0 (Methylmethacrylates)
RN  - 0 (Polyethylenes)
SB  - IM
MH  - *Bone Cements
MH  - Chemical Phenomena
MH  - Chemistry
MH  - Elasticity
MH  - *Methylmethacrylates
MH  - Microscopy, Electron, Scanning
MH  - *Polyethylenes
MH  - Tensile Strength
EDAT- 1989/01/01 00:00
MHDA- 1989/01/01 00:01
CRDT- 1989/01/01 00:00
PHST- 1989/01/01 00:00 [pubmed]
PHST- 1989/01/01 00:01 [medline]
PHST- 1989/01/01 00:00 [entrez]
AID - 10.1002/jbm.820230106 [doi]
PST - ppublish
SO  - J Biomed Mater Res. 1989 Jan;23(1):63-80. doi: 10.1002/jbm.820230106.