The wobbling knee or the unstable knee is dreaded by every sportsperson as it can effectively put paid to their
dreams of becoming a sports star .. especially players involved in contact sports.
Why the knee becomes unstable?.. To answer this query one need to know the anatomy of the knee. the knee is the biggest joint in the human body but inherently unstable without its intelligently and strategically placed ligaments…the important being the anterior and posterior cruciate ligaments and the medial and lateral collateral ligaments,they all function as a single unit. Any rotational force acting on the knee with lateral or medial bending of knee which can happen during tackling in football, or a jumping shot in volley ball or basket ball, or in any high violence injury for that matter, can produce tear of these ligaments.. and thereby produce instability.
There may or may not be an associated fracture,if there is a fracture then that needs to be treated first,but
usually there is no fracture. The typical complaint will be a sense of the knee giving way, or a feeling as if the knee is wobbling…your doctor might prescribe a knee support which might support your knee temporarily.
You may have to do an MRI to assess the severity of the anterior cruciate ligament tear[ACL]. Generally for complete tear you may have to undergo arthroscopic reconstruction of the ligament. This is now a very safe procedure which can keep your dreams alive.
Generally the procedure is done around the third week after injury, followed by a stringent post operative protocol,this protocol being more important than the surgery itself.
The most important thing you should remember is, do not neglect any injury around the knee .. just because the xray is normal doesn’t mean everything is normal,a torn ACL is never visible in an xray. Its always better to get a expert opinion.