Hip 1 Flashcards
(30 cards)
Where is the hip joint at?
Between the acetabulum and the femoral head.
The hip joint in general is unstable in who?
Infants especially female and northern european infants.
What % of congenital hip dislocations are female?
90%.
What are the 3 parts of the acetabulum and where are they located at?
Ilium- superior, Iscium (posteroinferior), pubis- anteroinferior.
What is the difference between the acetabular brim and notch?
The brim is 4/5 of a full circle and the notch encloses the anteroinferior 1/5.
What is the thickest cartilage of the hip joint?
The superior semilunar cartilage because it is the main weight bearing region.
What are the other cartilage of the hip joint (besides the superior semilunar cartilage)?
Labrum and trans. Ligament.
Where will the labrum and transverse ligament be at and what are they made of?
Labrum- upper 4/5 of ring. Transverse ligament- the inferior part that covers the notch. Both are made of fibrocartilage.
What is the anteversion angle like for the acetabulum in males vs. females and infants?
Larger angle for females. Infants- more anterverted than adults.
Increased anterversion of the acetabulum will do what?
Decrease stability.
What will inferior acetabular tilt be like for males vs. females, and adults vs. infants?
Males larger than females. Adults greater than infants.
Increased inferior tilit of the acetabulum will do what?
Increase stability.
What is the shape of the femur head?
What is the shape of the femur head?
What are the 2 keeper rings?
Labrum and zona orbicularis of the capsule.
What is the articular cartilage of the femur head like?
Thickest superior since all pressure is here.
Where is proximal physis of the femur located at and this causes what?
It is proximal to the neck and this creates a lot of shear force as we grow.
When will a slipped capital femoral epiphysis be seen?
In early teens and tall and large people.
What does trochanter mean?
To turn.
During growth the distal femur normally becomes ______.
twisted medially relative to the proximal end.
What is the normal, anterverted and retroverted angles of the femoral torsion?
Normal- 10-20degrees. Anteverted- >20degrees. Retroverted- <10 degrees.
What will make the hip more and less stable anterverison or retroversion?
Anterversion- less stable. Retroversion- more stable.
What is femoral inclination?
Draw a line from the femoral head parallel to the shaft. Then draw another line parallel to the long shaft of the femur and then measure the inside angle?
What is the normal femoral inclination angle?
120-130 degrees.
What will femoral inclination angles of >130 and <120 mean?
> 130- coxa valga- less stable hip. <120- coxa vara- more stable hip.
