Four-screw compression plate fixation for diaphyseal humerus fractures

Area of Science:

• Orthopedic Surgery
• Trauma Management
• Biomechanical Engineering

Background:

• Humeral shaft fractures are common orthopedic injuries.
• Current gold standard for surgical fixation involves compression plating with at least six bicortical screws.
• A less rigid construct may offer adequate stability for fracture healing.

Purpose of the Study:

• To evaluate the efficacy and safety of a four-screw construct compared to the conventional six-screw construct for acute diaphyseal humerus fractures (ADHFs).
• To test the hypothesis that a less rigid construct provides adequate strength for uneventful fracture union.

Main Methods:

• Retrospective review of patients with ADHFs treated with open reduction and compression plate fixation.
• Patients were divided into two groups: Group 1 (four screws) and Group 2 (six or more screws).
• One-to-one matching was performed, comparing complication rates including nonunion, malunion, infection, and implant failure.

Main Results:

• Eleven matched pairs of patients were analyzed.
• Group 1 (four screws) had a 9.1% rate of nonunion, infection, or hardware failure.
• Group 2 (six screws) had a 0% complication rate.
• The difference in complication rates between the two groups was not statistically significant (p = 1.00).

Conclusions:

• Four-screw bicortical fixation may be a feasible alternative for ADHFs treated with large fragment compression plating.
• This less rigid construct demonstrated comparable outcomes to the conventional six-screw technique in this cohort.
• Further prospective studies are warranted to confirm these findings.