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Transcript of Rainbow’s Enduser.engineering.uiowa.edu/~bme_158/Lecture/drpIowaTotalHip.pdf · Rainbow’s End....

Rainbow’s End

The Iowa Total Hip

Radiolucency

Femoral Component

Femoral Head & Neck

TiBac Cup

TiBac Cup

Design Parameters

Effects of Stem Length on Peak Stress

Finite Element Model

of Cemented Femoral

Component

FEA of Femoral Stem

Effects of Valgus Stem-Neck Angle

Critical Stresses for various Cross-Sections

Alternative Stem Cross-Sections

Cross-Sectional Cement Stresses

Interaction of Cup Thickness and Metal Backing

PMMA Stress

Interaction of Cup Thickness and Metal Backing

Trabecular Bone Stress

Interaction of Cup Thickness and Metal Backing

Subchondral Bone Stress

Medial Cement

Lateral Cement

Cement Stress vs. Stem Length

Medial StemLateral Stem

Stem Stress vs. Stem Length

Stem Length

Medial Cement

Lateral Cement

Stem Thickness vs. Cement Stress

Medial Stem

Lateral Stem

Stem Stress vs. Stem Thickness

Cross-Sectional Size

Endurance Limits for Implant Materials

Effects of Femoral Component Modulus

Medial Cement

Lateral CementStem Elastic Modulus

Cement Stress vs. Stem Modulus

Stem Elastic Modulus

Medial Stem

Lateral Stem

Stem Stress vs. Stem Modulus

Elastic Modulus of the Stem

Collarless Collar/Bone Collar/Cement

Effect of Collar Contact

Stresses due to Collar Contact Variants

Range of Sizes

Specialty Femoral Components