The causes of patellar fracture mainly include direct violence, indirect violence and strong muscle pulling.
1. Direct violence: for example, falling from a high place, kneeling injury, patella suffered from impact, etc. Direct violence can lead to patella and femoral condyle impact, resulting in stellate fracture, vertical fracture, comminuted fracture and so on.
2. Indirect violence, strong muscle pulling: such as excessive pulling of the knee extension device, or when about to fall, in order to prevent falling down and injury, the quadriceps muscle will be violently contracted, which may cause patellar fracture, usually resulting in transverse fracture.
Patellar fracture is recommended to go to the hospital in time, under the professional guidance of the doctor, improve the relevant examination, and then combined with the characteristics of the medical history.