Rotating hinge total knee arthroplasty in severly affected knees.

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering

Background:

• Total knee arthroplasty (TKA) is a common procedure for end-stage knee arthritis.
• Complex knee cases with bone compromise and instability present challenges for standard TKA.
• Rotating hinge prostheses offer enhanced stability and range of motion.

Purpose of the Study:

• To evaluate the clinical and radiographic outcomes of the Finn rotating hinge total knee prosthesis.
• To assess the efficacy of this prosthesis in primary and revision TKA, particularly in complex cases.

Main Methods:

• A consecutive series of 24 knees (21 patients) undergoing Finn rotating hinge TKA (primary or revision) were reviewed.
• Patients were followed for an average of 33 months, with 17 patients followed for over 2 years.
• Knee Society scoring criteria were used for categorization, and clinical/radiographic results were assessed.

Main Results:

• Average Knee Society knee score improved from 44 to 83 points post-surgery.
• Average functional score improved from 10 to 45 points post-surgery.
• Significant improvements in pain and function were observed, with no early mechanical failures.

Conclusions:

• The Finn rotating hinge total knee replacement is an acceptable option for severely affected knees with compromised bone and ligamentous instability.
• The prosthesis provides excellent pain relief, restored walking capacity, and stabilization in early follow-up.
• This rotating hinge design shows promise for complex TKA cases requiring enhanced stability.