Last reviewed · How we verify

NCT04748510: FATKAvsMATKA

Functionally Aligned vs Mechanical Axis Aligned Total Knee Arthroplasty

Completed NA Results posted Last updated 8 August 2025
What this trial tests

NA trial testing Functionally Aligned Total Knee Arthroplasty in Osteoarthritis in 100 participants. Completed in 14 November 2024.

Timeline
30 April 2021
Primary endpoint
8 October 2024
14 November 2024

Quick facts

Lead sponsorPerth Hip and Knee
PhaseNA
StatusCompleted
Study typeINTERVENTIONAL
Allocationrandomized
Designparallel
Maskingdouble
Primary purposetreatment
Enrollment100
Start date30 April 2021
Primary completion8 October 2024
Estimated completion14 November 2024
Sites2 locations across Australia

Drugs / interventions tested

Conditions studied

Sponsor

Perth Hip and Knee

Who can join

Adults 45 to 75, any sex, with Osteoarthritis or Osteo Arthritis Knee. Patients with the condition only — healthy volunteers not accepted.

Results — posted to ClinicalTrials.gov

Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.

Change in Forgotten Joint Score After 2 Years From Baseline Primary · Preoperatively and 2 years postoperatively

Difference in relative change in Forgotten Joint Score (2 years post-operatively compared to preoperatively) between FA and MA patients. Scale 0-100 with higher scores being a better outcome

GroupValue95% CI
Functionally Aligned Total Knee Arthroplasty50.1± 28.3
Mechanical Axis Aligned Total Knee Arthroplasty46.4± 32.4
Change in Oxford Knee Score After 2 Years From Baseline Primary · Preoperatively and 2 years postoperatively

Difference in relative change in Oxford Knee Score (2 years post-operatively compared to preoperatively) between FA and MA patients. Scale 0-48 with higher scores being a better outcome.

GroupValue95% CI
Functionally Aligned Total Knee Arthroplasty17.0± 7.5
Mechanical Axis Aligned Total Knee Arthroplasty17.2± 8.6
Change in Range of Motion After 2 Years From Baseline Primary · Preoperatively and 2 years postoperatively

Difference in relative change in range of motion via goniometry (2 years post-operatively compared to preoperatively) between FA and MA patients.

GroupValue95% CI
Functionally Aligned Total Knee Arthroplasty2.8± 9.9
Mechanical Axis Aligned Total Knee Arthroplasty2.8± 9.3

Adverse events — posted to ClinicalTrials.gov

Time frame: Adverse events were monitored for each participant from the time of enrolment (baseline) through to their final study visit (2 years post-operative).. Reporting threshold: 5%. Adverse-event reports describe events observed during the trial — not all are caused by the drug.

Functionally Aligned Total Knee Arthroplasty
Serious: 1/50 (2%)
Deaths: 0/50
Mechanical Axis Aligned Total Knee Arthroplasty
Serious: 1/49 (2%)
Deaths: 0/49

Serious adverse events (2 terms)

ReactionSystemFunctionally Aligned Total…Mechanical Axis Aligned To…
MUAInjury, poisoning and procedural complications
Paroxsymal SVT post operativeCardiac disorders

Most-reported serious reactions: MUA, Paroxsymal SVT post operative.

Data from ClinicalTrials.gov NCT04748510 adverse events section.

Sponsor's own description

The objective of this study is to compare clinical and radiological outcomes in robotic-arm assisted TKA using mechanical alignment (MA TKA) versus robotic-arm assisted TKA with functional alignment (FA TKA). These outcomes will be used to determine if patient recovery is better with functionally aligned Mako robotic-assisted total knee arthroplasty (FA TKA) or mechanically aligned Mako robotic-assisted total knee arthroplasty (MA TKA).

Publications & conference data

2 peer-reviewed publications reference this trial (live from Europe PMC):

  1. A prospective randomised control trial comparing functional with mechanical axis alignment in total knee arthroplasty: study protocol for an investigator initiated trial.
    Steer R, Tippett B, Khan RN, Collopy D, et al · · 2021 · cited 11× · PMID 34372888 · DOI 10.1186/s13063-021-05433-z
  2. A Prospective Randomised Control Trial Comparing Functional with Mechanical Axis Alignment in Total Knee Arthroplasty: study protocol for an investigator initiated trial
    Steer R, Tippett B, Khan RN, Collopy D, et al · · 2021 · DOI 10.21203/rs.3.rs-368647/v1

Verify or expand the search:

Other recruiting trials for Osteoarthritis

Currently open trials in the same condition.

Verify against primary sources

Data sources for this page

Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT04748510.

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing