Is the patient aware of the difference between resurfaced and nonresurfaced patella after bilateral total knee arthroplasty? A systematic review of simultaneous bilateral randomized trials

Table 4 Summary of previous trials comparing complications between patellar resurfacing (PR) and nonresurfacing (NPR) after total knee arthroplasty

Author	Patellar clunk and crepitus	Secondary resurfacing following NPR	Revision of following PR	Other complications
Burnett et al. [30]	N/P	7.4% of NPR : AKP scores have not improved despite resurfacing	3.5% of PR for aseptic loosening at 6.9 years	N/P
Enis et al. [6]	N/P	0 (0%)	0 (0%)	N/P
Smith et al. [31]	N/P	0 (0%)	0 (0%)	N/P
Ha et al. [32]	10% of PR < 40% of NPR (P < 0.001)	0 (0%)	0 (0%)	0 (0%)
Koh et al. [15]	No difference	0 (0%)	0 (0%)	N/P
Dong et al. [33]	N/P	2% of NPR for severe AKP and subluxation	0 (0%)	N/P

PR patellar resurfacing, NPR nonresurfacing, N/P not present, AKP anterior knee pain

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