Insall proximal realignment with/without tibial tubercle osteotomy for recurrent patellar instability yields acceptable medium- to long-term results but risk of osteoarthritis progression is considerable

Journal of Experimental Orthopaedics

Table 3 Clinical findings and return to sport (RTS) readiness at follow-up^a

	n	%
Clinical findings	42
Valgus malalignment		40.4
Hyperextension > 10 degrees		9.5
Knee range of motion deficit > 10 degrees		11.9
Increased femoral anteversion^b		7.1
Positive J - sign		9.7
Positive ReDPAT 0–30 degrees		28.6
Positive ReDPAT > 30 degrees		11.9
Functional tests, return to sports (RTS) readiness	39^c
Single leg hop test with LSI > 85%		66.7
YBT-LQ anterior reach < 4 cm		79.5
Both RTS criterias accomplished		59.0

^aReDPAT Reversed dynamic patellar apprehension test, YBT-LQ Lower Quarter - balance test, LSI Limb symmetry index ^b > 70 degrees internal rotation rotation or a difference > 30 between passive internal and external rotation ^c3 knees were excluded from analysis due to bilateral surgery within a year