SPECT/CT and triple-phase bone scan: A valuable diagnostic approach for identifying indications for secondary patellar resurfacing in patients with unexplained anterior knee pain post-TKA

Table 2 Demographics and TKA characteristics of 5 patients receiving revision surgeries

Cases	Age	Gender	Time to revision (years)	Follow-up time (years)	Prosthesis	SPECT/CT concentration	Diagnosis	Surgical option	Side	KSS scores
										Objective knee indicators (100)		Functional activities (100)		Patient expectations (15)	Patient satisfaction (40)
										Pre-surgery	Post-surgery	Pre-surgery	Post-surgery	Patient expectations (15)	Pre-surgery	Post-surgery
1	74	Female	15.26	5.30	Zimmer	Tibial	Loosening of tibial prosthesis	Revision of tibial prosthesis and spacer	Right	79	95	46	83	15	12	36
2	63	Female	1.44	4.80	Depuy	Dispersed	PJI	2 stage revision	Left	77	93	42	77	14	12	36
3	85	Female	3.41	4.25	Zimmer	Dispersed	PJI	DAIR	Left	68	88	43	64	14	10	30
4	71	Male	0.80	4.62	Depuy	Dispersed	Instability	Replace spacer	Right	76	91	59	76	15	18	36
5	71	Male	2.57	3.38	Depuy	Dispersed	Loosening	Revision	Left	77	95	41	79	14	12	36

Note: The age indicated refers to the time point at which patients underwent revision surgery. The average age of the patients was 72.8 ± 7.95 years, with the group containing 3 females and 2 males. The mean duration from the initial total knee arthroplasty (TKA) to the revision surgery was 4.69 ± 5.99 years, and the average follow-up time post-revision was 4.47 ± 0.72 years
Abbreviation: TKA total knee arthroplasty, PJI Prosthetic Joint Infection, DAIR Debridement, Antibiotics, and Implant Retention. All prostheses used were of the posterior stabilized (PS) design

ISSN: 2524-7948