Risk Factors for Revision Surgery Following Revision Total Knee Arthroplasty Using a Hinged Knee Prosthesis for...

Area of Science:

• Orthopedic surgery
• Arthroplasty
• Revision surgery

Background:

• Hinged knee replacements (HKRs) are utilized for limb salvage in revision total knee arthroplasty (RTKA).
• Limited data exists on risk factors for reoperation after HKR, particularly comparing septic and aseptic etiologies.

Purpose of the Study:

• To evaluate risk factors for revision surgery after HKR implantation.
• To compare revision rates between septic and aseptic RTKA cases.

Main Methods:

• Multicenter, retrospective review of 150 patients receiving HKR (2010-2020).
• Patients categorized into septic (n=85) and aseptic (n=65) RTKA groups.
• Cox hazard regression analysis to identify risk factors for revision.

Main Results:

• Septic RTKA group had a higher reoperation rate (46%) than aseptic (25%) (P=0.01).
• Aseptic RTKA demonstrated superior revision-free survival (P=0.002).
• HKR with flap reconstruction increased revision risk threefold (P<0.0001).

Conclusions:

• HKR for aseptic revision is more reliable with lower revision rates.
• Concomitant flap reconstruction is a significant risk factor for revision, irrespective of RTKA indication.
• HKR is a viable option for RTKA when indicated, but patient education on risks is crucial.