What is a patellar sleeve avulsion?

What is a patellar sleeve avulsion?

A sleeve avulsion fracture is a unique injury in children where a tendon is avulsed from the bone with an intact sleeve of cartilage or periosteum, with or without osseous fragments [2]. A patella sleeve avulsion is an osteochondral injury through the relatively weak cartilaginous sleeve.

What is a sleeve fracture of patella?

Patellar Sleeve Fractures are rare injuries seen in children between 8 and 12 years of age characterized by separation of the cartilage “sleeve” from the ossified patella.

What is a closed sleeve fracture?

Patellar sleeve (avulsion) fractures are rare injuries occurring in the skeletally immature population. This is an important diagnosis as the displaced bone-forming tissue will continue to grow and ossify, enlarging, and possibly duplicating the patella.

What is a knee avulsion?

Avulsion fractures usually happen to young athletes. You might be sprinting, hitting, sliding or doing other sports activities that involve quick movements and sudden changes in direction. A piece of bone attached to a ligament or tendon breaks away from the main part of the bone.

What is an avulsion in medical terms?

Medical Definition of avulsion : a tearing away of a body part accidentally or surgically avulsion of the fingernail.

What is a nondisplaced fracture of the patella?

Stable patella fracture: In a stable fracture, also called a “nondisplaced” fracture, the broken pieces of your bone remain essentially in the right place. They may still be connected to each other, or they may be separated by a millimeter or two. This type of fracture usually heals well without surgery.

What type of fracture occurs when the patella fractures with multiple fragments?

If the bone shatters into more than two pieces that don’t stay in place, the fracture is called a comminuted fracture. A comminuted fracture may be a closed or open fracture.

What type of fracture is a patella fracture?

Closed Fracture Most types of patella fractures are closed fractures, in which the patella does not break through the skin. Some types of closed fractures may be treated without surgery.

What are the different types of knee fractures?

Types of Patellar Fractures

• Stable fracture. This type of fracture is nondisplaced.
• Displaced fracture. In a displaced fracture, the broken ends of the bone are separated and do not line up correctly.
• Comminuted fracture. In this type of fracture, the bone shatters into three or more pieces.
• Open fracture.

Is the patella a ligament or tendon?

The tendons of the knee. Muscles are connected to bones by tendons. The patellar tendon attaches the bottom of the kneecap (patella) to the top of the shinbone (tibia). When a structure connects one bone to another, it is actually a ligament, so the patellar tendon is sometimes called the patellar ligament.

What tendon covers the patella?

patellar tendon
The largest tendon around the knee is the patellar tendon. This tendon connects the patella (kneecap) to the tibia. This tendon covers the patella and continues up the thigh. The portion of tendon above the patella is called the quadriceps tendon since it attaches to the quadriceps muscles in the front of the thigh.

What is the most common type of patellar fracture?

The most common fracture pattern is a simple 2-part diversion caused by a direct blow (i.e. dashboard injury). As a result of the bony lesion the extensor mechanism of the knee joint can become insufficient.

What are patellar sleeve avulsions (PSA)?

Patellar sleeve avulsions (PSA) are rare injuries that occur in children and adolescents, and represent less than 1% of all pediatric fractures [ 1, 2 ]. Most reported cases of PSA involve the inferior patellar pole, but less frequent bilateral and superior pole fractures have also been reported [ 3, 4 ].

What is a patellar sleeve fracture?

Patellar sleeve fractures are a rare injury seen in children between 8 and 12 years of age characterized by a traumatic separation between the cartilage “sleeve” and the main part of the ossified patella. Treatment is casting if the fracture is nondisplaced and surgical fixation if the fracture is displaced.

What is an avulsion (sleeve) fracture?

An avulsion (sleeve) fracture of the proximal patella pole in a child. Diagnosis, treatment and results in a patient after a fall onto the knee.

Is the patellar tendon avulsed off the distal pole?

The patellar tendon was avulsed off the distal pole and anterior aspect of blood infiltrated patella, with an intact proximal patellar pole and quadriceps tendon