Effect of patient specific instruments compared with conventional instruments in total knee arthroplasty : a randomized controlled trial.

ABSTRACT:

Background and purpose

 Patient-specific instrumentation (PSI) in total knee arthroplasty (TKA) aims to improve implant alignment and clinical outcomes, but its effectiveness remains uncertain. We aimed to compare whether PSI was superior to conventional instrumentation (CVI) in TKA. The primary outcome was the Oxford Knee Score (OKS) at 2 years with assessments of additional clinical outcomes up to 5 years after surgery.

Methods

 This study included 70 knees with primary osteoarthritis randomized (1:1) to undergo TKA using either PSI or CVI. Outcomes were evaluated using patient-reported outcome measures (PROMs), radiographic alignment, and radiostereometric analysis (RSA) of migration over the full follow-up period of 5 years.

Results

 68 knees underwent surgery as

SUBMITTER: Hermodsson J 

PROVIDER: S-EPMC12673265 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature