Stress analysis of glenoid component designs for shoulder arthroplasty

Abstract Secure and lasting fixation of the glenoid component in total shoulder arthroplasty is difficult because there is an insufficient volume of strong bone in the scapula. Consequently, radio-lucencies of the glenoid component are common (much more common than radiolucencies of the humeral component). Early glenoid component designs were fabricated wholly from polyethylene, were fixated with PMMA cement, and had various degrees of constraint and conformity between the glenoid surface and the ball of the humeral component. More recent design variations include metal backing and non-cemented anchorage systems. In this study, various designs of cemented glenoid component are analysed using the finite element method. These are examined for (a) two different abduction angles; 60° and 90°; (b) high and low conformity and (c) high and low constraint. Stress distributions are compared with the failure strengths of the components and the influence of the various design factors can be observed.

[1]  R. Hawkins,et al.  Total shoulder arthroplasty. , 1989, Clinical orthopaedics and related research.

[2]  J. Kabo,et al.  The influence of conformity and constraint on translational forces and frictional torque in total shoulder arthroplasty. , 1993, Clinical orthopaedics and related research.

[3]  P. McCullagh Biomechanics and Design of Shoulder Arthroplasty , 1995, Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine.

[4]  R. Jinnah,et al.  The Dana total shoulder arthroplasty. , 1988, The Journal of bone and joint surgery. American volume.

[5]  Kelly Ig Unconstrained shoulder arthroplasty in rheumatoid arthritis. , 1994 .

[6]  R. L. Dooley,et al.  Finite element modeling of the glenoid component: Effect of design parameters on stress distribution. , 1992, Journal of shoulder and elbow surgery.

[7]  K. Johnson Contact Mechanics: Frontmatter , 1985 .

[8]  D. Palma,et al.  Surgery of the Shoulder , 1951, The Indian Medical Gazette.

[9]  Poppen Nk,et al.  Forces at the glenohumeral joint in abduction. , 1978 .

[10]  W H Harris,et al.  Comparison of the fatigue characteristics of centrifuged and uncentrifuged simplex P bone cement , 1987, Journal of orthopaedic research : official publication of the Orthopaedic Research Society.

[11]  P J Prendergast,et al.  Prediction of bone adaptation using damage accumulation. , 1994, Journal of biomechanics.

[12]  T S Thornhill,et al.  Nonconstrained total shoulder arthroplasty in patients with polyarticular rheumatoid arthritis. , 1989, The Journal of arthroplasty.

[13]  C. Neer Replacement arthroplasty for glenohumeral osteoarthritis. , 1974, The Journal of bone and joint surgery. American volume.

[14]  F Matsen,et al.  Mechanisms of glenohumeral joint stability. , 1993, Clinical orthopaedics and related research.

[15]  I. Clarke,et al.  Problems in Gieno-Humeral Surface Replacements—Real or Imagined? , 1979 .

[16]  C. Neer,et al.  Recent experience in total shoulder replacement. , 1982, The Journal of bone and joint surgery. American volume.

[17]  M. Kronberg,et al.  Should the glenoid be replaced in shoulder arthroplasty with an unconstrained Dana or St. Georg prosthesis? , 1992, Annales chirurgiae et gynaecologiae.

[18]  R. Cofield Total shoulder arthroplasty with the Neer prosthesis. , 1984, The Journal of bone and joint surgery. American volume.

[19]  C. Sledge,et al.  Total shoulder arthroplasty versus hemiarthroplasty , 1990 .

[20]  F A Matsen,et al.  Total shoulder arthroplasty. , 1987, The Journal of bone and joint surgery. American volume.

[21]  J. Sidles,et al.  Edge displacement and deformation of glenoid components in response to eccentric loading. The effect of preparation of the glenoid bone. , 1992, The Journal of bone and joint surgery. American volume.

[22]  J. D. Shine,et al.  Optimisation of the shoulder simulator investigation of dynamical and anatomical problems , 1992 .