Lateral unicompartmental knee arthroplasty: A review

Table 1 Traditional indications and contraindications

Indications
Predominantly isolated lateral compartment osteoarthritis
Angular deformity < 10°
Body weight < 80 kg
Contraindications
Flexion contracture > 15°
ACL and/or MCL insufficiency
Inflammatory synovitis

ACL: Anterior cruciate ligament; MCL: Medial collateral ligament.

Table 2 Survivorship of lateral unicompartmental knee arthroplasty

Ref.	Number of UKA	Type of implant	Mean follow-up (yr)	Survivorship (number of revisions)
Scott and Santore[6] (1981)	12	Cemented, all poly tibia	3.5 (2-6)	83% at 3.5 yr (2)
Marmor[47] (1984)	14	Cemented, all poly tibia	7.4 (2.5-9.83)	NA (2)
Gunther et al[48] (1996)	53	Cemented, metal-backed, mobile-bearing	5 (2.5-9.83)	82% at 5 yr (11)
Ohdera et al[49] (2001)	18	Four different designs	8.25 (5-15.75)	NA (2)
Ashraf et al[33] (2002)	83	Cemented all poly tibia	9 (2-21)	74% at 15 yr (15)
O'Rourke et al[50] (2005)	14	Cemented all poly tibia	24 (17-28)	72% at 25 yr (2)
Swienckowski and Pennington[23] (2004)	29	Cemented, metal-backed (75%); all poly tibia (25%)	12.4 (3.1-15.6)	100% at 12.4 yr (0)
Sah and Scott[24] (2007)	49	Three different designs	5.2 (2-14)	100% at 5.4 yr (0)
Argenson et al[16] (2008)	38	Four different designs	12.6 (3-23)	84% at 16 yr (5)
Lustig et al[43] (2011)	54	Cemented, all poly tibia	8.4 (5-16)	98% at 10 yr (1)
Lustig et al[34] (2012)	13	Three different designs	10.2 (3-22.1)	100% at 5 yr; 80% at 15 yr (3)
Heyse et al[44] (2012)	50	Full poly, metal-backed cemented, metal-backed uncemented	10.8 (5-16)	91.8% at 10 and 15 yr
Fornell et al[45] (2018)	41	Cemented, metal-backed, mobile bearing design	4.1 (2-7)	97.5% at 5 yr
Zambianchi et al[46] (2020)	67	Fixed bearing metal backed design	3	100% at 3 yr (0)

UKA: Unicompartmental knee arthroplasty; NA: Not available.