Contact force between the tibial spine and medial femoral condyle: A biomechanical study.
Clin Biomech (Bristol, Avon)
; 60: 9-12, 2018 12.
Article
en En
| MEDLINE
| ID: mdl-30292063
ABSTRACT
BACKGROUND:
Contact between the tibial spine and medial femoral condyle with internal tibial rotation (ITR) has been proposed as a factor for the development of osteochondritis dissecans lesions. We hypothesized that tibial spine contact force (CF) would increase significantly with applied internal tibial torque (IT).METHODS:
A 20â¯mm diameter cylinder of bone encompassing the tibial spine was cored and attached to a load cell. The isolated bone cylinder included the tibial attachments of the anterior cruciate ligament (ACL) and anterior horn of the lateral meniscus (AHLM). Eleven human cadaveric knees were flexed from 0°-50° under 200â¯N of tibiofemoral compression (TFC), without and with 2â¯N-m IT. Tests were repeated with the AHLM cut, and again with both AHLM and ACL cut, where the load cell recorded CF alone without contributions from any ligamentous attachments.FINDINGS:
There were no significant differences in CF, ITR, or valgus tibial rotation (VTR) after sectioning the AHLM, without or with applied IT. With no tibial torque, mean CFs were less than 20â¯N throughout the flexion range. Addition of IT significantly increased 1) mean CF by 44.4â¯N(SD 15.8â¯N) at 0°(+240%) and 27.2â¯N(SD 5.0â¯N) at 20°(+675%), 2), mean ITR by 10.2°(SD 0.8°) at 0° flexion and 18.6°(SD 2.0°) at 20° flexion, and 3) mean VTR by 1.3°(SD 0.4°) at 0° flexion and 4.4°(SD 0.8°) at 20° flexion.INTERPRETATION:
Our hypothesis was confirmed only between 0° and 20° of knee flexion, where the intercondylar separation distance is relatively small and the possibility of tibial spine contact with ITR is greater.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Tibia
/
Fémur
/
Articulación de la Rodilla
Límite:
Humans
Idioma:
En
Revista:
Clin Biomech (Bristol, Avon)
Asunto de la revista:
ENGENHARIA BIOMEDICA
/
FISIOLOGIA
Año:
2018
Tipo del documento:
Article