Two Different Methods to Measure the Stability of Acetabular Implants: A Comparison Using Artificial Acetabular Models
| Autor: | Kathleen Denis, Quentin Goossens, Wim Desmet, Michiel Mulier, Jos Vander Sloten, Leonard Pastrav |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
total hip arthroplasty
Stability test Bone density Computer science Arthroplasty Replacement Hip 0206 medical engineering micromotion 02 engineering and technology Prosthesis Design lcsh:Chemical technology Biochemistry Stability (probability) Article Bone and Bones Analytical Chemistry 03 medical and health sciences 0302 clinical medicine Humans lcsh:TP1-1185 Range of Motion Articular Electrical and Electronic Engineering Instrumentation Fixation (histology) 030222 orthopedics Bone material properties Implant design Prostheses and Implants Initial stability 020601 biomedical engineering Atomic and Molecular Physics and Optics Biomechanical Phenomena acetabular implant stability Hip Prosthesis Implant Biomedical engineering |
| Zdroj: | Sensors Volume 20 Issue 1 Sensors, Vol 20, Iss 1, p 254 (2020) Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| DOI: | 10.3390/s20010254 |
| Popis: | The total number of total hip arthroplasties is increasing every year, and approximately 10% of these surgeries are revisions. New implant design and surgical techniques are evolving quickly and demand accurate preclinical evaluation. The initial stability of cementless implants is one of the main concerns of these preclinical evaluations. A broad range of initial stability test methods is currently used, which can be categorized into two main groups: Load-to-failure tests and relative micromotion measurements. Measuring relative micromotion between implant and bone is recognized as the golden standard for implant stability testing as this micromotion is directly linked to the long-term fixation of cementless implants. However, specific custom-made set-ups are required to measure this micromotion, with the result that numerous studies opt to perform more straightforward load-to-failure tests. A custom-made micromotion test set-up for artificial acetabular bone models was developed and used to compare load-to-failure (implant push-out test) with micromotion and to assess the influence of bone material properties and press-fit on the implant stability. The results showed a high degree of correlation between micromotion and load-to-failure stability metrics, which indicates that load-to-failure stability tests can be an appropriate estimator of the primary stability of acetabular implants. Nevertheless, micromotions still apply as the golden standard and are preferred when high accuracy is necessary. Higher bone density resulted in an increase in implant stability. An increase of press-fit from 0.7 mm to 1.2 mm did not significantly increase implant stability. ispartof: Sensors vol:20 issue:1 ispartof: location:Switzerland status: published |
| Databáze: | OpenAIRE |
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