odd facet | patella ridge

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odd facet*******Heard of the Odd Facet? These images show how the patella articulates with the underlying trochlear groove and femoral condyles from knee extension to flexion. From full .Want to increase the sensitivity of your tendon reflex testing? Try the Jendrassik .odd facet patella ridgeThe Odd Facet; Tips for a Successful Anamnesis; Understanding and Training .

By Erik Dalton, Ph.D. – In those presenting with true iliosacral upslips, joint .

The iliopsoas is frequently regarded as a key player in the compromise of hip .

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The odd facet of the patella is an area of cartilage defined by a distinct vertical ridge which separates this facet from the medial facet proper 3. The anterior surface is . Generally, thicker the patellar facet, thicker the overlying cartilage. Therefore, the lateral facet (Wiberg Type II and III) usually has the thickest cartilage . The medial facet shows the greatest anatomical variation. It is subdivided into the medial facet proper and a much smaller one called the “odd facet” along the . The odd facet (arrows) is located at the peripheral aspect of the medial facet, and is devoid of cartilage The patella receives its blood supply from an .

- superiorly and inferiorly, with the 7th facet being the most medial portion called the odd facet; - Wiberg: 3 shapes based on position of vertical ridge; - type I: there are roughly = . The odd facet may develop as a response to functional loads and does not contact the medial femoral condyle except in extreme flexion. Several ossification .odd facet Patellar instability (PI) is a common problem among pediatric and adolescent patients. Commonly cited anatomic risk factors for PI include trochlear dysplasia, patella .

One facet located on the medial border of the patella (“odd facet”) The medial and lateral facets are separated by the vertical patellar ridge which conforms to the trochlear groove. Articular congruence .図2 オッド面(Odd facet) オッド面は膝蓋骨関節面の内側にあり、膝関節の屈曲角度が大きくなると大腿骨内側顆と接するようになる 膝関節屈曲に伴う膝蓋骨関節面の接触部位の変化 Distally, it attaches to the tibial tubercle via the patellar tendon. The posterior articulating surface of the patella is composed of two facets, a medial and lateral facet, separated by a vertical ridge, and in 30% of the population, there is a third facet, the odd facet, most medially.The two halves can be further divided into seven facets, three horizontal pairs: proximal, middle, and distally and an odd facet that is located on the far medial, posterior aspect of patella. The patellar facets are convex in shape in order to accommodate the concave femoral surface with the lateral side wider to help maintain patellar position.- superiorly and inferiorly, with the 7th facet being the most medial portion called the odd facet; - Wiberg: 3 shapes based on position of vertical ridge; - type I: there are roughly = medial and lateral facets - type II most common: medial facet is only 1/2 size of lat. facet;

The 3rd odd facet exists along the extreme medial border of the medial facet. BORDERS & MUSCLE ATTACHMENTS. The base or superior border is thick, rough and sloped from behind, downward, and forward: it gives attachment to that portion of the Quadriceps femoris which is derived from the Rectus femoris and Vastus intermedius.The patella's articular surface has three distinct facets: the medial, lateral, and odd facets, which create seven unique articular surfaces. 1 Each facet is covered with up to a 5-mm thickness of hyaline cartilage, thicker than the femur's articular cartilage. The medial and lateral facets have superior, middle, and inferior articular surfaces. A seventh facet is on the most medial edge of the patella and is called the odd facet. Any osteochondral fracture or defect will lead to pain and instability and requires fixation. Besides bony support, even more important to the stability of the patella is the soft tissue envelope. The quadriceps insert at the superior patella and encase the . The odd facet (arrows) is located at the peripheral aspect of the medial facet, and is devoid of cartilage The patella receives its blood supply from an anastomotic ring that originates from the geniculate arteries (the supreme geniculate from the superficial femoral artery, four geniculate arteries arising from the popliteal artery, and the .odd facet contacts the medial posterior femoral condyle. After 90° of knee flexion, patellofemoral stresses on the lateral patel - lar facet increase, while stresses on the me-dial patellar facet decrease to zero.17,22,39,50 Studies on patellofemoral dysfunc-tion, pain, and patellofemoral osteoar-thritis describe articular cartilage wear One facet located on the medial border of the patella (“odd facet”) The medial and lateral facets are separated by the vertical patellar ridge which conforms to the trochlear groove. Articular congruence between the patella and the femur is imperfect and varies according to the position of the knee:

膝蓋骨の解剖です。膝蓋尖に膝蓋腱が付着しますが、正確には膝蓋尖の裏面に付着します。 また、膝蓋骨の関節軟骨は人体の軟骨の中でとても分厚く、外側の方が内側より横に長い形状となっています。 .In osteoarthritis (OA) the initial changes occur to the cartilage surface of the odd facet (medial) and are followed by fibrillation. The retinacula supporting the patella may be a major source of pain (Fulkerson, 1982), or the subchondral bone of the odd facet (Hertling and Kessler, 1990). As we have seen, the odd facet is only occasionally . At between 90 and 135 degrees of flexion, the patella rotates and the ridge that separates the medial and odd facets engages the femoral condyle. At 135 degrees, separate lateral and medial (limited to .

The patello-femoral contact areas were defined under load throughout the range of movement by the dye method. During movement from extension to 90 degrees of flexion a band of contact sweeps across the patella from inferior to superior pole, but the odd facet makes no contact. At about 135 degrees of flexion separate medial and lateral contact .patella ridge What is odd facet of patella? The medial most portion of the medial facet lacks articular cartilage and is known as the odd facet 2 , 3. The anterior surface is rough, for attachment of tendons and ligaments. The ossification centers of the patella appear between 3 and 6 years. They fuse at puberty, with higher levels of physical activity.

Anatomic and developmental variations of patellar shape and height are common and these include variations in size of patellar facets (Wiberg types), odd facet, which is an additional medial facet (innermost) that articulates with the femur beyond 120°, 5 and inferior pole elongation. 6 Bipartite patella represents an accessory ossicle, which .

medial, lateral and odd facet on the posterior surface of the patella articulate with the medial and lateral condyles of the femur; the lateral facet is the largest and steepest facet; articular surface: hyaline cartilage; capsule: fibrous capsule and synovial membrane is continuous with the knee joint; Movement

the knee menisci are shaped accordingly. Saddle joint between the patella and femoral condyles: medial, lateral and odd facet on the posterior surface of the patella articulate with the medial and lateral condyles of the femur. on flexion, more parts of the bony surface are exposed to articulation (four below, odd facet) and are more proximal .

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odd facet|patella ridge