Resurfacing Lecture Slides 10-21-02 Incorrect Correct - PowerPoint PPT Presentation

Resurfacing Lecture Slides 10-21-02

Incorrect Correct Placement-Dependence

(Slight) Valgus Orientation

Polyethylene Acetabular Component

Metal Femoral Component

Rosenthal-Biokeramik Ceramic Femoral Component

ICLH Acetabular Component

ICLH Femoral Component

Fibrous Metaplasia Normal vs. Varus

Steel Polyethylene Steel Ceramic Fuyura Components

Conceptual Metal on Metal Metal on Poly Nishio Design

Matching-Cups Principle

Salzer Bioceramic

Acetabular Reaming

Femoral Head Shaping

Ducheyne’s Porous Coating

THARIES Component Thicknesses

Design Trade-Offs

Cup Fixation Evaluation

Torque Testing

Hemispherical Cylindrical Sagittal Torque to Failure

Hemispherical Cylindrical Coronal Torque to Failure

Femoral THARIES Geometrical Parameters Acetabular

Component Diameter (mm) THARIES Sizing Considerations

THARIES Working Dimensions

THARIES Instrumentation

THARIES Pre-Op Planning

Causes of Notching

Cemented Poly Metal Shell FEA Zonings Acetabular Component Stresses

10 MPa Compression Tension Peri-Acetabular Stresses

Wagner Cup FEA

Attachment Variants

mm Relative Motion at Cup/Bone Interface

3-d Cup FEA

Cup Hoop Interface Normal Interface Shear .05 MPa Stress Distributions

Fyhrie et al., 1988 Analysis Section Orientation

Elastic Modulus Distribution

Sliding Normal -1.78 Ingrown -1.14 -1.47 Concave-Side Interface Compressive Stresses

Ingrown Normal ± 0.24 ± 0.38 Concave-Side Interface Shear Stresses

Normal Ingrown Concave-Side Energy Stresses

Sliding Normal -1.12 Ingrown -0.76 -0.85 Convex Interface Compressive Stresses

Normal Ingrown ± 0.38 ± 0.32 Convex Interface Shear Stresses

Sliding Normal Ingrown Convex-Side Energy Stresses

Ti Co-Cr 1.0 0.5 0 100 200 E p /E c Maximum Stress Shielding