Rapid Prototyping for In Vitro Knee Rig Investigations of Prosthetized Knee Biomechanics: Comparison with Cobalt-Chromium Alloy Implant Material

Retropatellar complications after total knee arthroplasty (TKA) such as anterior knee pain and subluxations might be related to altered patellofemoral biomechanics, in particular to trochlear design and femorotibial joint positioning. A method was developed to test femorotibial and patellofemoral jo...

Full description

Saved in:
Bibliographic Details
Published in:BioMed research international 2015-01, Vol.2015 (2015), p.1-9
Main Authors: Jansson, Volkmar, Weber, Patrick, Chevalier, Yan, Woiczinski, Matthias, Müller, Tatjana, Steinbrück, Arnd, Schröder, Christian, Müller, Peter E.
Format: Article
Language:English
Subjects:
Artificial knee
Biomechanics
Chromium Alloys - chemistry
Comparative analysis
Computer-Aided Design
Equipment Failure Analysis
Friction
Humans
In vitro testing
Joint surgery
Knee
Knee Joint - physiopathology
Knee Joint - surgery
Knee Prosthesis
Knees
Ligaments
Metal-on-Metal Joint Prostheses
Methods
Polyethylenes - chemistry
Polytetrafluoroethylenes
Printing, Three-Dimensional
Production processes
Properties
Prostheses
Prosthesis Design - methods
Prosthetics
Range of Motion, Articular
Rapid prototyping
Studies
Surgical implants
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Retropatellar complications after total knee arthroplasty (TKA) such as anterior knee pain and subluxations might be related to altered patellofemoral biomechanics, in particular to trochlear design and femorotibial joint positioning. A method was developed to test femorotibial and patellofemoral joint modifications separately with 3D-rapid prototyped components for in vitro tests, but material differences may further influence results. This pilot study aims at validating the use of prostheses made of photopolymerized rapid prototype material (RPM) by measuring the sliding friction with a ring-on-disc setup as well as knee kinematics and retropatellar pressure on a knee rig. Cobalt-chromium alloy (standard prosthesis material, SPM) prostheses served as validation standard. Friction coefficients between these materials and polytetrafluoroethylene (PTFE) were additionally tested as this latter material is commonly used to protect pressure sensors in experiments. No statistical differences were found between friction coefficients of both materials to PTFE. UHMWPE shows higher friction coefficient at low axial loads for RPM, a difference that disappears at higher load. No measurable statistical differences were found in knee kinematics and retropatellar pressure distribution. This suggests that using polymer prototypes may be a valid alternative to original components for in vitro TKA studies and future investigations on knee biomechanics.
ISSN:2314-6133
2314-6141
DOI:10.1155/2015/185142