In vitro initial fixation of porous-coated acetabular total hip components. A biomechanical comparative study |
| |
Authors: | P F Lachiewicz P B Suh J A Gilbert |
| |
Affiliation: | Division of Orthopaedics, University of North Carolina, Chapel Hill. |
| |
Abstract: | Two-phase in vitro testing was performed to determine the initial mechanical stability of uncemented but fixed porous coated acetabular components. Six each of three-screw fixation, two-peg fixation, and three-spike fixation porous acetabular components were implanted into fresh and embalmed human cadaver acetabula. Measurement of prosthesis-bone displacement at a load of 100 kg did not show a significant difference among the three methods of fixation. However, torque testing showed that three-screw fixation failed at significantly higher loads (46 N-m) than two-peg fixation (32 N-m) or three-spike fixation (32 N-m). |
| |
Keywords: | |
|
|