Quantitative Analysis of Incongruity, Contact Areas and Cartilage Thickness in the Human Hip Joint

1997 ◽  
Vol 158 (3) ◽  
pp. 192-204 ◽  
Author(s):  
F. Eckstein ◽  
R.v. Eisenhart-Rothe ◽  
J. Landgraf ◽  
C. Adam ◽  
F. Loehe ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Hip Joint ◽  
Cartilage Thickness ◽  
Contact Areas ◽  
And Cartilage

scholarly journals Validation of Finite Element Predictions of Cartilage Contact Pressure in the Human Hip Joint

2008 ◽  
Vol 130 (5) ◽  
Author(s):  
Andrew E. Anderson ◽  
Benjamin J. Ellis ◽  
Steve A. Maas ◽  
Christopher L. Peters ◽  
Jeffrey A. Weiss
Keyword(s):  
Finite Element ◽  
Hip Joint ◽  
Image Data ◽  
Contact Stresses ◽  
Stair Climbing ◽  
Patient Specific ◽  
Contact Areas ◽  
Subject Specific ◽  
Peak Pressures ◽  
And Cartilage

Methods to predict contact stresses in the hip can provide an improved understanding of load distribution in the normal and pathologic joint. The objectives of this study were to develop and validate a three-dimensional finite element (FE) model for predicting cartilage contact stresses in the human hip using subject-specific geometry from computed tomography image data, and to assess the sensitivity of model predictions to boundary conditions, cartilage geometry, and cartilage material properties. Loads based on in vivo data were applied to a cadaveric hip joint to simulate walking, descending stairs, and stair-climbing. Contact pressures and areas were measured using pressure sensitive film. CT image data were segmented and discretized into FE meshes of bone and cartilage. FE boundary and loading conditions mimicked the experimental testing. Fair to good qualitative correspondence was obtained between FE predictions and experimental measurements for simulated walking and descending stairs, while excellent agreement was obtained for stair-climbing. Experimental peak pressures, average pressures, and contact areas were 10.0MPa (limit of film detection), 4.4–5.0MPa, and 321.9–425.1mm2, respectively, while FE-predicted peak pressures, average pressures, and contact areas were 10.8–12.7MPa, 5.1–6.2MPa, and 304.2–366.1mm2, respectively. Misalignment errors, determined as the difference in root mean squared error before and after alignment of FE results, were less than 10%. Magnitude errors, determined as the residual error following alignment, were approximately 30% but decreased to 10–15% when the regions of highest pressure were compared. Alterations to the cartilage shear modulus, bulk modulus, or thickness resulted in ±25% change in peak pressures, while changes in average pressures and contact areas were minor (±10%). When the pelvis and proximal femur were represented as rigid, there were large changes, but the effect depended on the particular loading scenario. Overall, the subject-specific FE predictions compared favorably with pressure film measurements and were in good agreement with published experimental data. The validated modeling framework provides a foundation for development of patient-specific FE models to investigate the mechanics of normal and pathological hips.

Effects of platelet-rich plasma on the clinical outcomes and cartilage thickness in patients with knee osteoarthritis

2019 ◽  
pp. 1-9 ◽  
Author(s):  
Ekin İlke Şen ◽  
Mustafa Aziz Yıldırım ◽  
Tuğba Yeşilyurt ◽  
Fatma Nur Kesiktaş ◽  
Demirhan Dıraçoğlu
Keyword(s):  
Knee Osteoarthritis ◽  
Clinical Outcomes ◽  
Platelet Rich Plasma ◽  
Cartilage Thickness ◽  
And Cartilage

Total Hip Arthroplasty

2019 ◽  
pp. 83-95
Author(s):  
Sydney E. Rose ◽  
Julio A. Gonzalez-Sotomayor
Keyword(s):  
Quality Of Life ◽  
Total Hip Arthroplasty ◽  
General Anesthesia ◽  
Hip Joint ◽  
Hip Arthroplasty ◽  
Total Hip ◽  
Severe Arthritis ◽  
And Cartilage ◽  
Anesthesia Spinal

This chapter discusses the goals, procedure, and potential outcomes of total hip arthroplasty (THA). Patients may be candidates for a THA when they have severe arthritis of their hip(s) (degeneration of cartilage covering the ends of the bones creating the hip joint). Arthritic hip pain is often progressive and gets worse as the cartilage continues to deteriorate. Typically, at the time a patient seeks hip arthroplasty, his or her quality of life has become very compromised. In a total hip arthroplasty, damaged bone and cartilage of the hip joint are removed and replaced with prosthetic components. THA can be performed under neuraxial anesthesia (spinal or epidural) or general anesthesia or a combination of both.

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