How often do we need offset stems for revision total knee arthroplasty? About a consecutive series of 789 knees

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Table 2

Published outcomes following revision TKA with the use of offset stems on the femoral and tibial sides.

Author	Years	rTKA	Mean age	Etiology	Straight/offset stems	Follow-up	Outcomes/Conclusion
Present study	2010–2022	789	72.7 years	Infection (31.8%)	609/88	59.3 months	Offset stems are occasionally (11%) in rTKA and probably overestimate regarding post-operative radiographic evaluation
				Aseptic loosening (28.6%)
				Malposition (13.2%)
Rosso et al. [13]	2008–2016	53	71.5 years	Aseptic loosening (41.5%)	37/16	56.6 months	A stepwise approach may achieve good clinical and radiological outcomes
				Infection (30.2%)
				Instability (9.4%)
Crawford et al. [14]	2005–2013	278	67 years	Aseptic loosening (47%)	241/37 (tibial)	6 years	Modular revision systems improve clinical outcomes and provide good survivorship
				Instability (13.2%)
				Polyethylene wear (22%)
Brilhault and Ries [3]	1998–2005	126	57.9 years	n/a	91/35 (femoral)	4.5 years	Offset femoral stem increases the resulting PCO and improves alignment
Sah et al. [15]	1998–2003	88	68.8 years	Aseptic loosening (52%)	62/26 (femoral)	65 months	Hybrid stem fixation contributes to a durable fixation and reduces stem tip pain
				Infection (17%)	24/64 (tibial)
				Instability (9%)	24/64 (tibial)
Nakasone et al. [16]	2001–2003	52	64.7 years	Infection (31%)	0/52	n/a	Diaphyseal uncemented offset stems facilitate accurate alignment for both femoral and tibial components
				Stiffness (23%)
				Aseptic loosening (17%)

rTKA: revision total knee arthroplasty; PCO: posterior condylar offset; n/a: not applicable.

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