Midface distraction osteogenesis: internal vs. external devices.

Area of Science:

• Craniofacial Surgery
• Orthognathic Surgery
• Biomedical Engineering

Background:

• Midface retrusion presents significant challenges in craniofacial reconstruction.
• Internal distraction devices (MID) are established but may have limitations.
• External distraction devices offer potential advantages in control and efficiency.

Purpose of the Study:

• To compare the efficacy and outcomes of internal versus external distraction devices for midface retrusion.
• To evaluate differences in operative time, blood loss, and complication rates.
• To assess the benefits of 3-dimensional control offered by external devices.

Main Methods:

• A comparative study of 20 patients with midface retrusion undergoing distraction osteogenesis.
• Patients were divided into two groups: internal distraction (MID device) and external distraction (Red or Blue device).
• Outcomes measured included operation time, peroperative blood loss, and complication incidence.

Main Results:

• External distraction (Blue device) showed a significantly shorter operation time (mean 298 min) compared to internal distraction (MID group, mean 354 min).
• Peroperative blood loss and complication rates were comparable between the internal and external distraction groups.
• Both internal and external devices were utilized for various osteotomy types, including Le Fort II, Le Fort III, and monobloc procedures.

Conclusions:

• While internal distraction devices remain a 'gold standard,' external devices offer a shorter operative time for midface retrusion.
• External distraction devices provide enhanced 3-dimensional control during the distraction process.
• External distraction is a preferable treatment option for midface retrusion when patient tolerance allows.