[Diaphyseal femur pseudarthroses--only a technical problem?]

Area of Science:

• Orthopedic Surgery
• Traumatology
• Biomaterials Science

Background:

• Femoral diaphyseal nonunions are challenging complications following initial operative fracture treatment.
• A significant proportion of nonunions result from suboptimal primary osteosynthesis techniques.
• Understanding the factors contributing to nonunion is critical for improving patient outcomes.

Purpose of the Study:

• To analyze the outcomes of treating femoral diaphyseal nonunions.
• To identify correlations between primary fixation methods and nonunion types (atrophic vs. hypertrophic).
• To evaluate the effectiveness of revision strategies and factors influencing healing time.

Main Methods:

• Retrospective analysis of 145 patients with femoral diaphyseal nonunions treated between 1981 and 1994.
• Review of primary osteosynthesis methods (plates, nails, external fixators) and subsequent revision procedures.
• Statistical analysis to determine correlations between fixation types, nonunion characteristics, and healing outcomes.

Main Results:

• Atrophic nonunions were significantly correlated with primary "classic" plating (P < 0.01).
• Improper osteosynthesis techniques contributed to 73% of pseudarthroses, with high rates associated with plates, reamed nails, and external fixators.
• Wound infections occurred in 23% of cases; open fractures had higher rates of atrophic nonunion and infection.

Conclusions:

• Primary plating is strongly associated with the development of atrophic femoral nonunions.
• Revision surgery, particularly converting to intramedullary implants, is often necessary.
• Early detection and intervention for nonunions are essential, emphasizing the importance of appropriate primary fracture management.