Compatibility of Retrograde Intramedullary Nails With Knee Prostheses: A Comprehensive Analysis

Area of Science:

• Orthopaedic Surgery
• Biomedical Engineering

Background:

• Periprosthetic distal femoral fractures present significant challenges, especially in elderly patients with total knee arthroplasties.
• Retrograde intramedullary nailing is a preferred fixation method due to stability and early weight-bearing.
• Nail-prosthesis compatibility is crucial for successful surgical outcomes.

Purpose of the Study:

• To review and evaluate the compatibility of retrograde intramedullary nails with various total knee arthroplasty prostheses.
• To assess available lateral distal femoral plating options.
• To provide a compatibility matrix for fixation strategies in complex fractures.

Main Methods:

• An evidence-based review synthesizing data from key studies and manufacturer specifications.
• Analysis of technical parameters including intercondylar dimensions, notch geometry, nail diameter, and bend angles.
• Cross-referencing nail systems with prosthesis models to identify optimal combinations.

Main Results:

• Nail-prosthesis compatibility is influenced by nail diameter, intercondylar width, and posterior notch geometry.
• Detailed tables categorize prosthesis compatibility by manufacturer, model, and technical specifications.
• Identified critical factors and potential challenges for fixation.

Conclusions:

• This resource aids in selecting retrograde nails based on prosthesis geometry for periprosthetic fractures.
• Advancements have improved compatibility, but variations necessitate preoperative planning.
• Optimizing nail selection is key for managing these complex fractures.