Treatment of neuropathic unstable knee osteoarthritis by a condylar, rotating-hinge prosthesis with cementless pentagonal stem: a case series

International Journal of Surgery Case Reports, 2023 · DOI: https://doi.org/10.1016/j.ijscr.2023.108389 · Published: June 14, 2023

Orthopedics

Simple Explanation

This study presents the outcomes of using a specific type of knee replacement (PENTA® prosthesis) in patients with neuropathic unstable knee (NUK) osteoarthritis. The PENTA® prosthesis is a condylar, semi-constrained prosthesis with a polygonal, hydroxyapatite-coated (HA-coated) press-fit stem. The results showed significant improvement in functional scores, excellent radiological outcomes, and implant survival at the end of a long follow-up period.

Study Duration

124 months

Participants

Three knees in three patients

Evidence Level

Case series

Key Findings

1
KS knee scores improved from a mean of 12.3 preoperatively to 71.3 at the latest follow-up.
2
KS function scores improved from a mean of 1.7 preoperatively to 68.3 at the latest follow-up.
3
Radiological outcomes were excellent according to ISOLS scores, and no complications were observed.

Research Summary

This study presents late results of a small case series of end-stage NUK osteoarthritis reconstructed by a condylar, semi-constrained, prosthesis with a polygonal, hydroxyapatite-coated (HA- coated), press-fit stem. The significant improvement in functional scores, excellent radiological outcome, and implant survival at the end of a long follow-up period warrants TKA with a semi- constrained hinged implant in the setting of NUK. PENTA® prosthesis combines these properties well through a hydroxyapatite- coated, press-fit, pentagonal stem and precisely designed rotating hinge.

Practical Implications

Implant Choice

The PENTA® prosthesis offers a good choice of implant with its hydroxyapatite-coated, press-fit, pentagonal stem and precisely designed rotating hinge.

Surgical technique

Adhering to fundamental principles of knee arthroplasty is crucial for ligamentous balancing, lower extremity alignment, and reconstruction of osteoarticular defects in NUK patients.

Clinical benefits

Arthroplasty on a symptomatic NUK arthropathy patient can be beneficial, improving function and stability.

Treatment of neuropathic unstable knee osteoarthritis by a condylar, rotating-hinge prosthesis with cementless pentagonal stem: a case series

Simple Explanation

Key Findings

Research Summary

Practical Implications

Implant Choice

Surgical technique

Clinical benefits

Study Limitations

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Was this summary helpful?

Treatment of neuropathic unstable knee osteoarthritis by a condylar, rotating-hinge prosthesis with cementless pentagonal stem: a case series

Simple Explanation

Key Findings

Research Summary

Practical Implications

Implant Choice

Surgical technique

Clinical benefits

Study Limitations

Your Feedback

Was this summary helpful?