Reading Assignment: De Wall Malefijt et al., The Actual Status of - PowerPoint PPT Presentation

Oct 14, 2022 •13 likes •363 views

Reading Assignment: De Wall Malefijt et al., The Actual Status of Acrylic Bone Cement in Total Hip Replacement, Acta Orthop. Belg. 53: 52-58, 1987. Also, (re) read the Barich Ph.D. thesis section on fixturing for laboratory micromotion

Reading Assignment: De Wall Malefijt et al., “The Actual Status of Acrylic Bone Cement in Total Hip Replacement,” Acta Orthop. Belg. 53: 52-58, 1987. Also, (re) read the Barich Ph.D. thesis section on fixturing for laboratory micromotion testing. Homework Assignment: Review the Davies et al. article and the Rimnac et al. article on the effects of cement centrifugation. Take a side in this controversy, and support your view by critical reasoning. Should PMMA be centrifuged? Write 2-3 pages, double-spaced 12 pt. Due Wed Oct 9 th .
Biomechanics of Acrylic Cement Fixation
O H CH 3 O H CH 3 C – O – C – C* C – O* + C = C H C = O H C = O O O CH 3 CH 3 H CH 3 H CH 3 O H CH 3 H CH 3 … C – C C – C C – O – C – C C – C* H H C = O H C = O H C = O C = O O O O O CH 3 CH 3 CH 3 CH 3 Polymerization Reaction
Setting Time: 8.5 mins. Property Changes Approaching Setting Time
Effect of Aging on PMMA Breaking Stress
Effect of Aging on PMMA Elastic Modulus
Regions of High Cement Calcar Stress
Cement-Bone Interface
Beam Theory Load Transmission through the Stem
Construct Stresses from Beam Theory M: unit moment D M : medullary diam. D P : prosthesis diam.
FEA of Construct Stesses
Distribution of Bending Stresses
High Intensity Cement Technique Lavage & As Cut Surface Preparation
High Intensity Cement Technique Lavage As Cut & Surface Preparation
Complete Contact Cement-Bone Interface Gap
Fatigue Test Specimen
Uncentrifuged Centrifuged Simplex P Cement Porosity
Maximum Initial Tensile Stress (MPa) Curves S-N
Survival Probability
Survival Probability
Uniaxial Tensile Test
Endurance Limit
Compact Tensile Specimen Fracture Toughness Test
Crack Propagation
Compact Tensile Specimen
Zimmer Simplex Palacos Gentimicin Fracture Toughness Comparisons
Fatigue Crack Propagation
Gel Permeation Chromatography Molecular Weight Distributions
Contraction upon Setting
Fracture around Particles
Fracture through Particles
Average Molecular Weights

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