Comparison of Short Stems Versus Straight Hip Stems: A Biomechanical Analysis of the Primary Torsional Stability
| Autor: | Bernd Ishaque, Carlos Alfonso Fonseca Ulloa, Alexander Jahnke, Markus Rickert, J.B. Seeger, Suleiman Ghandourah, Gafar Adam Ahmed |
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| Rok vydání: | 2019 |
| Předmět: |
Orthodontics
030222 orthopedics medicine.medical_treatment Arthroplasty Replacement Hip Biomedical Engineering Measuring point 030229 sport sciences Prosthesis Design Prosthesis Resection Biomechanical Phenomena In vitro analysis 03 medical and health sciences 0302 clinical medicine medicine.anatomical_structure Physiology (medical) Invasive surgery medicine Femur Hip Prosthesis Stress Mechanical Cancellous bone Mathematics |
| Zdroj: | Journal of biomechanical engineering. 142(12) |
| ISSN: | 1528-8951 |
| Popis: | Cementless straight stems show very good survival rates. However, the more distal force application of straight stems may lead to release-related proximal stress-shielding. Nevertheless, this technical brief had the objective of conducting a biomechanical in vitro analysis comparing short stems with established straight stems with respect to their primary torsional stability. Two cementless short hip stems and three cementless straight hip stems were implanted in n = 5 synthetic femora each. Torsional torques were applied into the hip stems at a continuous interval of ±7 Nm. Micromotions were measured by six inductive extensometers on four different measurement levels. At the proximal measuring point, significantly smaller relative micromotions of the CLS® prosthesis could be detected compared to all other stem models (p |
| Databáze: | OpenAIRE |
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