The Elmslie–Trillat Procedure

Summary: The Elmslie–Trillat procedure is a proven and effective method for medialization of the patella. The procedure is indicated for the management of symptomatic lateral instability of the patella associated with an excessive Q angle or bony malalignment or both, resulting in an increase of the trochlea–tubercle distance. The procedure is combined with a lateral retinacular release and may be combined with a medial reconstruction as well. The Elmslie–Trillat procedure is not appropriate for use in the skeletally immature knee or a knee with preexisting medial patellar subluxation, medial compartment arthrosis, or varus deformity. The procedure has the advantage of simplicity, inherent stability, and reliable healing, while avoiding the pitfalls of excessive distal transfer and posterior recession.