2023年5月25日 · The superior two thirds of the posterior articular surface of patella articulates with the anterior surface of the femoral condyles to form the patellofemoral joint. The lateral articulating surface of the patella is usually larger than the medial articulating surface.

2023年1月3日 · The patella (kneecap) is located at the front of the knee joint, within the patellofemoral groove of the femur. Its superior aspect is attached to the quadriceps tendon and inferior aspect to the patellar ligament.

2024年12月5日 · Patella Fractures are traumatic knee injuries caused by direct trauma or rapid contracture of the quadriceps with a flexed knee that can lead to loss of the extensor mechanism. Diagnosis can be made clinically with the inability to perform a straight leg raise and confirmed with radiographs of the knee.

There is maximum contact between the patella and the intercondylar groove (1/3 of the posterior surface area of the patella). At 135 degrees of knee flexion (near full knee flexion), the patella contacts the femur with its superior pole and rests below the intercondylar groove. Kinetics [edit | …

2024年7月20日 · The patella is triangular in shape with a superior base and inferior apex. The proximal three-quarters of the posterior surface is smooth, composed of articular cartilage, which is the thickest in the body, as much as 5 mm in some adults.

2023年10月27日 · When the knee is flexed 90°, the superior aspect of the patella abuts an area of the femoral groove superior to the femoral notch. In deep flexion, the patella bridges the intercondylar notch, with contact occurring only at its medial and lateral margins.

Geometrically, the patella is shaped like an upside-down triangle that sits distal to the muscle bulk of the quadriceps that forms the patellar tendon. The superior surface is referred to as the base and the inferior patella is the apex (Figure 1).

- w/ increasing knee flexion, contact pressure moves proximally on patella up to superior pole and onto quadriceps tendon; - articular surface of patella, varying in thickness from approximately 2 to 5.5 mm, is divided into 7 fascets;

2023年7月22日 · As such, it features superior, medial and inferior margins. The lower border of the patella is convex and pointy, which is why it is called the apex (literally meaning the “tip”). The superior margin is called the base , which serves as an …

2023年4月11日 · The patellar ligament attaches to the inferior pole (bottom section) of the patella, while the quadriceps tendon attaches to the superior pole (top section). The medial and lateral patellar retinacula (fibrous connective tissue located at the inner and outer parts of the patella) are also attachment points for ligaments and muscles.