Shoulder and Knee Injuries

Shoulder and knee injuries are frequently overshadowed by neck and back pain in the first days after a crash and are diagnosed only when they fail to improve. Both joints are vulnerable in predictable ways: the shoulder from bracing against the steering wheel and from the seat belt crossing it, the knee from striking the dashboard or from bracing on the brake pedal. MRI-confirmed tears often require arthroscopic surgery and months of rehabilitation.

Shoulder injuries

• Rotator cuff tears: partial or full-thickness tears of the tendons that stabilize the shoulder, causing pain with overhead activity, weakness and night pain. Common in drivers who braced on the wheel.
• Labral tears (SLAP and Bankart): tears of the cartilage rim of the socket, often with instability or clicking.
• AC joint separation: injury to the joint at the top of the shoulder from direct impact, common in cyclists and motorcyclists.
• Fractures of the clavicle, scapula and proximal humerus.
• Adhesive capsulitis (frozen shoulder): stiffness that can develop after injury and immobilization.

Seat-belt shoulder injuries occur on the belt side (left shoulder for drivers, right for front passengers), a pattern that itself corroborates the mechanism.

Knee injuries

• Dashboard knee / PCL injury: the bent knee strikes the dashboard, driving the tibia backward and injuring the posterior cruciate ligament; can also fracture the patella or hip socket.
• ACL and MCL tears: from twisting and bracing forces, more common in pedestrians, cyclists and motorcyclists.
• Meniscus tears: cartilage tears causing locking, catching and swelling.
• Patellar fractures and chondral injuries from direct impact.
• Tibial plateau fractures: joint-surface fractures below the knee, common in pedestrian bumper strikes.

Why these injuries are found late

Emergency departments focus on life-threatening injury and fractures. Soft tissue tears in the shoulder and knee do not appear on X-ray and often present as “sprain” or “contusion” initially. When pain, weakness or mechanical symptoms persist past a few weeks, orthopedic referral and MRI identify the tear. The gap between crash and diagnosis is a common insurer argument; the answer is a clear record of symptoms from the first visit onward and a physician’s explanation of why the diagnosis was delayed.

Treatment and recovery

Many partial tears and sprains are treated with physical therapy and injections. Full-thickness rotator cuff tears, unstable labral tears, ACL tears in active people and displaced meniscus tears are usually treated arthroscopically. Recovery from rotator cuff repair typically takes four to six months; ACL reconstruction six to twelve months. Post-traumatic arthritis is a long-term risk after significant joint injury.

Claim considerations

Surgically treated shoulder and knee injuries are significant claims, especially for people whose work requires lifting, overhead reaching, kneeling or climbing. Damages include surgery and rehabilitation costs, lost work during recovery, permanent restrictions and the probability of future arthritis or joint replacement. Degenerative changes are common in these joints with age and are raised by insurers as with disc injuries; the aggravation rule applies.

Common questions

My shoulder MRI shows a tear but also “degenerative changes.” Does that hurt my claim?

It is a common insurer argument. The answer is the history: no prior shoulder symptoms, onset after the crash, a mechanism consistent with the injury, and a treating surgeon’s opinion. Aggravation of a degenerative condition is compensable.

I am a passenger and my right shoulder was hurt. Is that consistent?

Yes. The front passenger’s seat belt crosses the right shoulder, and seat-belt loading injuries occur on the belt side.

How long should I try therapy before surgery?

That is a decision for you and your orthopedic surgeon. For claims, following the recommended treatment sequence is what matters; a documented trial of conservative care before surgery is typical and does not weaken the claim.

Sources and official resources

• OrthoInfo — Rotator cuff tears
• OrthoInfo — Posterior cruciate ligament injuries

Links go to official government, court and public-health sources. Laws change; verify current text before relying on it.