[Intra-articular dislocation of patella].

Area of Science:

• Orthopedic Surgery
• Traumatology
• Knee Biomechanics

Background:

• Acute patellar dislocation is uncommon, especially intraarticular types.
• Falls can lead to severe knee joint injuries, including patellar dislocations.
• Pre-existing conditions like advanced arthrosis can influence injury patterns.

Observation:

• A 73-year-old patient experienced an acute intraarticular left patellar dislocation after a fall.
• The dislocation involved incarceration of the proximal patellar pole within the femoral intercondylar groove.
• The patient had significant pre-existing femoropatellar arthrosis.

Findings:

• Reduction under general anesthesia was necessary due to pain and muscle spasm.
• Surgical assessment revealed no associated injuries to the extensor apparatus, soft tissues, or joint structures.
• Post-reduction immobilization lasted two weeks.

Implications:

• This case highlights a rare presentation of patellar dislocation with intercondylar groove incarceration.
• Prompt diagnosis and management are crucial for favorable outcomes in complex patellar dislocations.
• Even with advanced arthrosis, successful conservative management post-reduction is possible.