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Table 3 Studies that evaluated BCA vs. TKA

From: Current status of bicompartmental arthroplasty

Author

Year

Type

Group 1,

(n)

Group 2, (n)

Follow-up

Outcomes

Results

Garner AJ [57]

2022

Retrospective cohort

Modular, single-stage, medial bicompartmental arthroplasty subjects, (16)

TKA, (20)

Mean months post-surgery (SD) 21 ± 18, 40.6 ± 43

Median months post-surgery (range) 12.5 (6–65), 19.5 (6–147)

Functional assessment

More near-natural gait and improved patient-reported outcomes

Uluyardimci E [17]

2019

Retrospective cohort

Inlay PFA/UKA, (49)

TKA, (49)

54 ± 4 and 54.4 ± 3.9 months

Functional and radiological assessment, complication rates, and length of hospital stay

Lower complication rates, shorter length of hospital stay, similar clinical and functional results

Schrednitzki D [53]

2020

RCT

Fixed-bearing unicompartmental knee arthroplasty, Inlay design PFJ, (40)

TKA, (40)

5 year

Functional assessment

Greater range of motion, no significant differences in clinical scores

oh JKM [55]

2020

RCT

Unlinked, modular BCA, (26)

TKA, (22)

10 years

Functional and radiological assessment

Comparable to TKA

Engh GA [45]

2014

RCT

BKA, (25)

TKA,(25)

2 years

Functional and radiological assessment

Equivalent results in clinical scores and functional testing

Morrison TA [58]

2011

Prospective cohort

BKA, (21)

TKA, (33)

2 years

Functional assessment, complication rate

Higher BKA complication rate, TKA recommended

Deng W [59]

2023

Retrospective cohort

BKA, (25)

TKA, (50)

minimum 2-year follow-up

Functional assessment

Better functional recovery, better joint perception, and higher RTS rate

  1. TKA Total Knee Arthroplasty, PFA Patellofemoral Arthroplasty, UKA Unicompartmental Knee Arthroplasty, BCA Bicompartmental Arthroplasty, PFJ Patellofemoral Joint, BKA Bicompartmental Knee Arthroplasty, RCT Randomized Controlled Trial, RTS Return to Sport; SD: Standard Deviation