Previous operations
Previous operations generally provide no obstacle to arthroscopic reconstruction, osteotomy or endoprosthesis. After various open knee surgeries, there may be a arthrofibrosis (= excessive formation of connective tissue, joint callosity) with joint stiffness.
Mostly there is a predispostion. Favoring this is a post-operative bleeding and/or lack of therapeutic exercise.
In a new operation, these scars masses (usually above the kneecap and the ligament cavity) have to be removed.
The achievable success depends less on the type and number of previous operations, but rather on the nature and extent of internal knee damage. The treatment and rehabilitation process may be delayed significantly due to a reoperation.