Three-dimensional Camera Imaging in Postoperative Evaluation of Distraction Osteogenesis

Area of Science:

• Craniofacial surgery
• Orthodontics
• Biomedical imaging

Background:

• Distraction osteogenesis requires regular monitoring of advancement.
• X-rays are commonly used but involve radiation exposure.
• Alternative, radiation-free methods are needed for evaluation.

Purpose of the Study:

• To evaluate the efficacy of 3D camera imaging for postoperative assessment of distraction osteogenesis.
• To compare 3D imaging with computed tomography (CT) scans in measuring advancement.

Main Methods:

• Three patients undergoing Le Fort I or III advancement osteotomy were studied.
• VECTRA H1 3D imaging and CT scans were used for evaluation.
• 3D imaging software corrected for facial tilt and size; superimposition and landmark measurements were performed. CT analyzed bone distances at the pterygomaxillary junction.

Main Results:

• 3D imaging effectively evaluated distraction by allowing image superimposition.
• Soft tissue changes measured by 3D imaging and bony changes by CT did not fully align with internal distraction device movements.
• Observed bony advancements were less than the distraction amount, with soft tissue shrinkage noted post-distraction.

Conclusions:

• 3D camera imaging is a valuable, radiation-free tool for evaluating distraction osteogenesis.
• Discrepancies between soft tissue and bony measurements highlight the complexity of distraction osteogenesis assessment.
• Further research is needed to reconcile 3D imaging findings with actual bony displacement.