Femoro Patella Vialla patellofemoral arthroplasty: An independent assessment of outcomes at minimum 2-year follow-up

Table 3 A comparison of our results with those previously published for patellofemoral arthroplasty and total knee replacement for isolated patellofemoral arthritis

Ref.	Implant	Number knees/patients	Mean age (yr)	Mean follow-up (yr)	OKS	Melbourne Score	Patient satisfaction	Trochlear dysplasia	Complications	Further operations
Dalury[23]	TKR	33/25	70	5.2	NR	NR	100%	NR	NR	0
Ackroyd et al[3]	AVON	109/85	68	5.0	39	25	80%	NR	4 superficial infections 2 stiffness	4 (4.2%) conversions to TKR
Starks et al[4]	AVON	37/29	66	2.0	39	28	86%	NR	1 patella fracture 1 patella resurfacing	1 (2.7%) patella resurfacing
Al-Hadithy et al[22]	FPV	49/41	62	3.0	38	NR	NR	NR	1 scar pain	3 (6%); 2 (4%) to TKR
Williams et al[10]	FPV	48/48	63	2.1	NR	NR	NR	Trochlear dysplasia associated with less revision	10 persistent pain 1 infection, 1 fracture, 1 hypertrophic scar	7 (15%); 5 to TKR
The present report	FPV	41/31	65	3.2	40	21	78%	84% of cases had trochlear dysplasia preoperatively No difference in outcomes	2 superficial infections: Treated with oral antibiotics	1 (2%) conversion to TKR. No lateral releases

NR: Not recorded; OKS: Oxford Knee Score; FPV: Femoro-Patella Vialla; TKR: Total knee replacement.