Dr. LaPrade recently published a case report for transplanting a very large trochlear allograft in a 21 year old female patient with trochlea dysplasia. The irregular shape of her trochlea was causing recurrent instability in her patella. Upon examination they determined that the cartilage in the patella was nearly normal but she had a grade IV lesion across the entire trochlear groove.
To read more, please access the abstract or paper here.
Nicholas N DePhillipo, Mitchell I Kennedy, Zachary S Aman, Gilbert Moatshe, Robert F LaPrade. "Osteoarticular Allograft Transplantation of the Trochlear Groove for Trochlear Dysplasia". JBJS Case Connect. Apr-Jun 2018;8(2):e29