Influence of a high hip center on abductor muscle function
| Autor: | J Steinbeck, J Stechmann, Jörg Jerosch, V. Güth |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
musculoskeletal diseases
medicine.medical_specialty Movement In Vitro Techniques Cadaver medicine Humans Orthopedics and Sports Medicine Gluteus maximus muscle Buttocks Muscle Skeletal Gluteus minimus muscle Fixation (histology) business.industry Acetabulum General Medicine Anatomy musculoskeletal system Prosthesis Failure body regions medicine.anatomical_structure Orthopedic surgery Surgery Hip Joint Implant Hip Prosthesis business |
| Zdroj: | Archives of orthopaedic and trauma surgery. 116(6-7) |
| ISSN: | 0936-8051 |
| Popis: | In 20 anatomic specimens with an acetabular defect (type Paprosky 3b), an acetabular component was implanted in the position of a high hip center. The vertical migration of the hip center ranged between 13 and 35 mm. It was accompanied by a lateralization and ventral migration of between 5 and 25 mm. The influence on the different abductor muscles was calculated through computer model comparing muscle force and muscle length before and after implantation of a high hip center. The increase in length of the gluteus maximus muscle and the posterior part of the gluteus minimus muscle ranged between 1% and 6%, while all other evaluated abductor muscles were shortened from 3% to 16%. The effect of the simultaneous changes of the lever arms was an increase in necessary muscle strength for pelvic stabilization from 140% to 250% compared with the original estimated strength prior to implantation. This may lead to insufficiency of the abductor muscles after placement of a high hip center. On the basis of these findings, we do not recommend the implantation of an acetabular component in the position of a high hip center. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink