Table 4 Comparative studies reporting range of motion and functional outcome for condylar-stabilised (CS) prosthesis in primary total knee arthroplasty

Current study

160 (mobile)

316 PS (fixed)

SCORE II

3 years

ROM 117°

IKS function 83.9

IKS Knee 85.6

ROM 119°

IKS function 85.3

IKS Knee 85.6

Lutzner (2021) [25]

RCT

60 (fixed)

62 (PS fixed)

Columbus

5 years

Intra-op. ROM 112.2°

SF-36 physical 42.3

OKS 42

UCLA 4

Intra-op. ROM 115.1°

SF-36 physical 37.9

OKS 41

UCLA 4

Akti (2021) [7]

RCT

33 (fixed)

33 PS (fixed)

Vanguard

1 year

ROM 128.7°

KSS ‘no difference’

ROM 133.9°

KSS ‘no difference’

Hinarejos (2021) [30]

RCT

CS Triathlon* (29)

CS U2** (30)

PS Triathlon* (29)

PS U2** (29)

Triathlon and U2

1 year

ROM* 112.8°

ROM** 109.3°

KSS total* 171.5

KSS total** 172.2

ROM* 116.5°

ROM** 113.5°

KSS total* 178.1

KSS total** 169.7

Kim (2021) [31]

RCT

50 (fixed)

50 PS (fixed)

Persona

2 years

ROM 126.5°

WOMAC 14.3

KSS function 110.8

KSS pain 52.2

ROM 127.4°

WOMAC 14.5

KSS function 108.5

KSS pain 51.2

Han (2020) [18]

RCT

34 (fixed)

34 PS (fixed)

Triathlon

5 years

ROM 115°

Knee society knee 95

ROM 124°

Knee society knee 93

Stirling (2019) [32]

Retrospective cohort

54 (fixed)

364 CR (fixed)

Triathlon

1 year

Pain VAS 64.5

OKS 33.2

Pain VAS 70.6

OKS 34.6

Jang (2019) [20]

RCT

45 (fixed)

45 PS (fixed)

Vanguard

2 years

ROM 130.1°

KSS 157.1

WOMAC 27.1

129.9°

KSS 156.5

WOMAC 26.6

Song (2017) [33]

RCT

38 (fixed)

38 CR (fixed)

e.motion

3 years

ROM 130.8°

HSS 94.3

WOMAC 25.2

KS Knee Society 92.3

ROM 128.7°

HSS 93.0

WOMAC 24.0

KS Knee Society 89.6

Fritzsche (2017) [19]

Case control

40 (fixed)

40 PS (fixed)

Columbus

Intra-op.

ROM 118.2°

ROM 124.4°

Kim (2016) [21]

RCT

42 (mobile)

40 PS (mobile)

e-motion

3 years

ROM 123.2°

WOMAC/HSS/KSS ‘no difference’

ROM 124.1°

WOMAC/HSS/KSS ‘no difference’

Minoda (2016) [29]

Case control

41 (mobile)

41PS (fixed)

Vanguard

3 years

ROM 129°

ROM 130°

Sur (2015) [9]

RCT

28 (fixed)

28 PS (fixed)

Triathlon

5 years

ROM 135.8°

Knee society score 114.8

WOMAC 62.7

ROM 133.6°

Knee society score 113.0

WOMAC 63.7

Machhindra (2015) [34]

Retrospective cohort

103 (mobile)

99 PS (mobile)

e. motion

2 years

ROM 126°

AKS function 95.0

AKS knee 92.7

ROM 131°

AKS function 93.2

AKS knee 92.5

Parsley (2006) [26]

Retrospective cohort

88 (fixed)

121 PS (fixed)

Sulzer NK-II Ultra congruent, UC

ROM 116.7°

Knee score 86.3

Knee function score 64.5

Satisfied 94.5%

ROM 119.9°

Knee score 84.5

Knee function score 64.0

Satisfied 98.8%

Uvehammer (2001) [27]

RCT

25 (fixed)

22 PS (fixed)

DePuy AMK

2 years

ROM 110°

HSS 88

ROM 110°

HSS 90

Laskin (2000) [22]

RCT

48 (fixed)

PS 62 (fixed)

Genesis II

1 year

ROM 115°

AKS function 95.0

AKS knee 60

ROM 115°

AKS function 95.0

AKS knee 65