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The patella is found in many tetrapods, such as mice, cats, birds and dogs, but not in whales, or most reptiles. In humans, the patella is the largest sesamoid bone (i.e., embedded within a tendon or a muscle) in the body. Babies are born with a patella of soft cartilage which begins to ossify into bone at about four years of age.
The patella is also a form of sesamoid bone in the horse. Although many carnivores have radial sesamoid bones, [16] the giant panda and red panda independently evolved to have an enlarged radial sesamoid bone. [16] [17] This evolution has caused the two species to diverge from other carnivores. [16]
Ossification (also called osteogenesis or bone mineralization) in bone remodeling is the process of laying down new bone material by cells named osteoblasts. It is synonymous with bone tissue formation. [ 1 ]
The knee is a modified hinge joint, a type of synovial joint, which is composed of three functional compartments: the patellofemoral articulation, consisting of the patella, or "kneecap", and the patellar groove on the front of the femur through which it slides; and the medial and lateral tibiofemoral articulations linking the femur, or thigh bone, with the tibia, the main bone of the lower ...
Intramembranous ossification mainly occurs during formation of the flat bones of the skull but also the mandible, maxilla, and clavicles; the bone is formed from connective tissue such as mesenchyme tissue rather than from cartilage.
Pellegrini-Stieda syndrome is an insult to the medial collateral ligament (MCL), causing damage and acute inflammation that sets into motion and delays ossification. [2] This insult is described as a macro trauma causing valgus stress with disruption of the MCL fibers.
Ischiopubic junction ossification can be absent, delayed, or abnormal. Other findings include hallux varus, brachymetatarsia affecting the fourth and fifth metatarsals, flat feet, and the presence of an elongated medial patellofemoral ligament. [20] [21] [22] Less common findings include micrognathia, cleft palate, frontal bossing and nose ...
Endochondral ossification is responsible for development of most bones including long and short bones, [4] the bones of the axial (ribs and vertebrae) and the appendicular skeleton (e.g. upper and lower limbs), [5] the bones of the skull base (including the ethmoid and sphenoid bones) [6] and the medial end of the clavicle. [7]