Patella tendon rupture refers to a complete tear of the tendon which joins the kneecap (patella) to the shin bone (tibia). It is the third injury in frequency of knee tendon ruptures (Rosso et al., 2016)
The function of the patellar tendon is to transmit forces produced by the thigh muscle to the shin bone. Forcible contraction of this muscle can overstress the patella tendon, resulting in it breaking or completely tearing.
Complete tears of the patella tendon often occur when the thigh muscle (quadriceps) is forcibly contracted. They are especially common in the active population and in athletes (Maffulli et al., 2017)
Management includes different surgical techniques, depending whether it is for an acute or chronic lesion;
In chronic lesions, primary repair is often not possible, because of tendon retraction; therefore, physiotherapy is essential for treating the symptoms and strengthening of the surrounding tissue.
Rosso F. et al., 2016, Patellar Tendon Rupture, Arthroscopy and Sport Injuries, Switzerland, Springer International Publishing, pp: 87-95
Maffulli N. et al., 2017, Surgical Treatment for Failure of Repair of Patellar and Quadriceps Tendon Rupture with Ipsilateral Hamstring Tendon Graft, Sports Medicine & Arthroscopy Review, 25(1), pp: 51-55