Purvi shah Anatomy Of patella PPT

Anatomy Of Patella, LL bone part-3
Patella/ Knee cap sesamoid bone; Triangular shape.
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1. Anatomy Of Patella LL Bone Part-3 BY PURVI SHAH B.P.T

2. Patella Largest sesamoid bone in the body. patella, derived from latin means small plate . It is situated in the front of the lower end of femur about 1cm above knee joint.  It protects the knee and connects the muscles in the front of the thigh to the tibia.

3. Patella

4. Side Determination Triangular in shape , Apex directed downwards. Apex is non articular posteriorly. The anterior surface is rough and non articular. The posterior articular surface is divided by a vertical ridge into a large lateral area and a smaller medial area.

5. Features The PATELLA has an apex, 3 borders ; superior,lateral and medial 2 surfaces ; anterior and posterior

6. Features APEX OF PATELLA, Directed downwards, is rough and vertically ridges. Covered by an expansion from the tendon of rectus femoris; separated from the skin by prepatellar bursa.

7. Articulation The patella articulates with the femur to form the Patellofemoral Joint.

8. Attachments on patella The superior or base provides insertion to the rectus femoris , in front and to the vastus intermedius behind. The lateral border provides insertion to vastus lateralis . The medial border provides insertion to vastus medialis . The non articular area on the posterior surfaces provides attachments to the ligamentum patellae.

9. Function Of Patella Primarily as an anatomic pulley for the quadriceps muscle . It increases the lever arm of the extensor mechanism allowing for more effective knee flexion and thus increase quadriceps strength by 33–50%.  

10. Ossification The patella ossifies from several centers which appear during 3 to 6 years of age. One or two centers at the superolateral angle of the patella is known as bipartite or tripartite patella . This condition is bilateral and symmetrical.

11. Clinical Anatomy The patella has a natural tendency to dislocate outwards because of the outward angulation between long axes of the thigh and leg. Fracture of the patella Clinical Features: Pain Swelling Restricted ROM Investigated by X ray

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