the pelvis. history fai is a relatively recent discovery. its original description is credited to orthopedic surgeon dr. reinhold ganz, who first proposed the condition as a cause for hip osteoarthritis in a publication in 2003. while the true diagnosis of fai can be considered a relatively recent discovery, reports of damage to the femoroaceatabular region date back over a century ago in the orthopedic realm of medicine. it was not until the development of an open surgical dislocation procedure was developed that fai was discovered as an anatomical difference and cause of osteoarthritis. orthopedic surgeon dr. reinhold ganz can be credited with this discovery in his 2003 publication that discussed the findings and relation to hip osteoarthritis. society notable persons who have had hip impingement: zach banner (born 1993), american nfl football offensive tackle for the pittsburgh steelers michelle kwan, american figure skater oscar hiljemark, swedish footballer greg holland, american baseball player devin mesoraco, american baseball player charlie morton, american baseball player andy murray, british tennis player greg norman, australian golfer alex rodriguez, american baseball player isaiah thomas, american basketball player notes unless otherwise specified in boxes, reference is the one marked in header. this can also be used in children. at between 5 and 10 years, the minimum normal value is 15°.