What is a Wiberg type 2 patella?
Wiberg classification is a system used to describe the shape of the patella based mainly on the asymmetry between the patellar medial and lateral facets on axial views of the patella. Increasing number type indicates a larger degree of asymmetry. This case is a good example of Wiberg type 2 or b.
What is the classification of patella?
Wiberg classification is a system for describing the shape of the patella based mainly on asymmetry between the patellar medial and lateral facet on axial views of the patella. Type I: the facets are concave, symmetrical, and of equal size.
What is Type 3 patella?
Lastly, Wiberg Type III refers to a markedly smaller convex medial facet, while the lateral facet is concave, but the angle between the medial and lateral facet is nearly 90°. Postoperative frontal and true-lateral radiographs were used to assess patellar height using the Insall–Salvati ratio [20].
What does the patella articulate with?
The patella, the largest sesamoid bone in the body, articulates only with the patellar surface of the distal femur (patellar notch). The patella rides in the tendon of the quadriceps femoris—the largest muscle of the thigh and the primary extensor of the knee.
What type of bone is the patella?
sesamoid bone
The patella (derived from latin means ‘small plate’) is a flat, inverted triangular bone, situated on the front of the knee-joint. It is the largest sesamoid bone, developed in the tendon of the Quadriceps femoris, and resembles these bones as it is… it’s composed mainly of dense cancellous tissue.
What is the patella bone?
The patella is a small bone located in front of the knee joint — where the thighbone (femur) and shinbone (tibia) meet. It protects the knee and connects the muscles in the front of the thigh to the tibia. This cartilage helps the bones glide easily along each other as you move your knee.
What is patella Parva?
In patella parva (Fig. 6.2), the entire patella is small. Such is the case in congenital dislocation, but cases occur without any apparent abnormal function. This form of dysplasia is often associated with quadriceps hypoplasia.
What is the apex of patella?
The apex of the patella is the nonarticular tip of the bone. It points distally. The lateral articular facet for the distal femur faces posteriorly and is the largest part of the large articular surface of the patella.
What is the function of the apex of the patella?
Patella
| Type | Sesamoid bone |
|---|---|
| Location | Within the quadriceps tendon, anterior to the knee joint |
| Parts | Apex (pointing inferiorly), medial and lateral borders, base (lies proximally) |
| Function | Aids with knee extension, allows for smooth movement during knee flexion/extension, protects the anterior surface of the knee joint |
What is multipartite patella?
Multipartite patella is an uncommon congenital abnormality that represents normal variant pathology and is a result of a failure of ossification during development. It is most commonly diagnosed as an incidental finding.
