"The ossification centres of the patella appear between 3-6 years. They fuse at puberty with higher levels of physical activity."
Expected headings
"Osteology"
"Musculotendinous and ligamentous"
"The medial and lateral facets of the patella are covered in hyaline cartilage and articulate with the medial and lateral condyles of the femur, respectively, to form the patellofemoral component of the knee joint. Some authors describe the medial facet as having superior, middle, inferior and lateral portions and the lateral facet as having superior, middle and inferior portions (subfacets) 4. The lateral facet is larger than the medial, which allows for side identification when the bone is placed posterior surface down on a flat surface 5."
"The medial and lateral facets of the patella are covered in hyaline cartilage and articulate with the medial and lateral condyles of the femur, respectively, to form the patellofemoral component of the knee joint. Some authors describe the medial facet as having superior, middle, inferior and lateral portions and the lateral facet as having superior, middle and inferior portions (subfacets) 4. The lateral facet is larger than the medial, which allows for side identification when the bone is placed posterior surface down on a flat surface 5."
"The quadriceps muscles pull the patella obliquely and laterally in relation to the femur. There are factors that prevent such displacement: larger lateral condyle of the femur, tension in the medial retinacular fibres and direction of insertion of fibres of the vastus medialis muscle."