E2- Hip and knee Flashcards
what can the shape of the femur be impacted by
growth of the ossification center
force of m activation
WB
circulation
trauma
what is coxa vara
less than 125-105 deg
hip bend inward
cause genu valga
what is coxa valga
greater than 125-140 deg
hip bend outward
cause genu vara
what is femoral torsion
relative RT between the shaft and neck
what is normal anteversion of femoral torsion
15 deg (8-20)
what is excessive anteversion
greater than 15-35
what is retroversion
less than 15 deg
what can excessive anteversion cause
hip dislocation
OA
increase contact stress
in toeing
how does increased anteversion affect motion
less ER more IR
how does retroversion affect motion
increase ER less IR
what is the normal for creg’s test
8-15 deg
where is the femoral head located
inferior to mid 1/3 of inguinal lig
posterior to center is fovea
what is the lig teres
tubular, synovial lined connective tissue
contains mechanoreceptors
what is housed in the lig teres
acetabular artery
what is the acetabulum
deep, cuplike socket
what is the acetabular notch
60-70 deg opening
what is in the acetabular fossa
fat, blood vessels, synovial membrane, ligaments
where is the normal contact of the femoral head
along the lunate surface
what is the lunate surface
covered in articular cartilage, sup-ant, where the femoral head contacts
when is the joint force highest for the lunate surface
walking
what happens to the acetabulum during midstance of the gait cycle
300% BW
notch widens
lunate deforms
increase contact area/decrease pressure
what is the acetabular labrum
strong, flexible ring of fibrocartilage rim of acetabulum
where is the transverse acetabular lig
spans the acetabular notch
where is the labro-chondral junction
internal labrum blends with the articular cartilage of acetabulum