Influence of contact hip stress on the outcome of surgical treatment of hips affected by avascular necrosis
| Autor: | Vinko Pavlovcic, Aleš Iglič, Veronika Kralj-Iglič, Srecko Herman, Vane Antolič, Drago Dolinar |
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| Rok vydání: | 2002 |
| Předmět: |
musculoskeletal diseases
Adult Male medicine.medical_specialty Population Avascular necrosis Models Biological Stress (mechanics) Femoral head Femur Head Necrosis Medicine Humans Orthopedics and Sports Medicine education Surgical treatment Pelvis education.field_of_study Hip business.industry General Medicine Middle Aged medicine.disease Surgery Biomechanical Phenomena Osteotomy medicine.anatomical_structure Treatment Outcome Orthopedic surgery Femur head necrosis Female business |
| Zdroj: | Archives of orthopaedic and trauma surgery. 123(10) |
| ISSN: | 0936-8051 |
| Popis: | Biomechanical analysis is an important tool that could improve the treatment of a diseased hip. However, it is still unclear how the biomechanical status affects the clinical outcome of a certain disease. In this work we studied the long-term effect of contact hip stress on the clinical outcome of hips that were operated on by various intertrochanteric osteotomies due to avascular necrosis of the femoral head. The hypothesis being tested is that the hips with a more favourable postoperative distribution of contact hip stress have a better clinical outcome. The study was performed on a population of 30 hips. For each hip, we determined the peak contact hip stress before the operation and immediately after the operation by using a recently developed method based on a three-dimensional mathematical model and the data from standard anteroposterior roentgenographs of both hips and pelvis. The hips were evaluated clinically 9–26 years after the operation and divided into a successful and an unsuccessful group. The average change of the peak stress due to the operation was calculated for each group, and the values were compared by t-test. In the successful group the operation caused an average decrease of the peak hip stress of about 10%, while in the unsuccessful group the operation caused an average increase of the peak hip stress of about 4%, the difference between the respective changes of the peak stress due to the operation being statistically significant (p=0.001). Our results support the hypothesis that the hips with a more favourable postoperative distribution of contact hip stress have a better clinical outcome. |
| Databáze: | OpenAIRE |
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