What is Hip Impingement?
, also known as femoroacetabular impingement or FAI, is a hip disorder wherein extra bone grown on the femoral head, acetabular, or both prevents the smooth and painless movement between the two joints.
Depending on where the extra bone is located, a patient’s hip impingement can be one of three types:
- Cam impingement - The extra bone growth is located on the femur or femoral head, resulting in a non-rounded shape. This deformity prevents the femoral head from moving smoothly within the hip socket.
- Pincer impingement - The extra bone growth is located on the socket resulting in an "extra cover" that causes labrum and cartilage damage.
- Combined impingement - The extra bone growth is located on both the femoral head and the hip socket.
As for causes, a patient may be diagnosed with FAI if they fall under the following:
- They are born with a ball-and-joint that has an abnormal structure.
- They regularly participate in activities requiring repetitive movements outside one's normal range of motion, like baseball, soccer, football, tennis, etc.
Aside from the ones mentioned above, other injuries or diseases such as Perthes or SCFE may lead to a possible diagnosis of FAI.
It's important to note that, unlike other diseases or disorders, a practitioner cannot diagnose hip impingement with a single test. Aside from physical assessments, a patient must undergo different imaging tests such as X-rays, CT scans, and MRIs.
We’ll be providing you with a template that'll hopefully help streamline the process of diagnosing. In the template, you'll find four physical tests - FADIR, FAVER, IROP, and the Maximal Squat test - where you can place the results and additional notes you may have per test. Check the next section for a free copy of the template and a guide on using it.










