[Three-dimensional modeling of mandibular distraction]

Area of Science:

• Craniofacial surgery
• Orthodontics
• Biomedical engineering

Background:

• Facial hemi-atrophy, a congenital condition affecting the first branchial arch, occurs in 1 in 4000-5000 children.
• Current treatment options for facial hemi-atrophy often require complex surgical interventions.

Purpose of the Study:

• To propose and evaluate the bone distraction lengthening technique for treating facial hemi-atrophy.
• To explore the benefits of pre-surgical planning and computer-aided simulation for optimizing treatment outcomes.

Main Methods:

• Utilized Ilizarov's bone distraction technique, adapted for the craniofacial skeleton.
• Developed distraction-simulation software using X-scanner data from a pediatric patient.
• Integrated pre-operative, intra-operative, and post-operative orthodontic therapy into the treatment plan.

Main Results:

• The distraction-simulation software successfully modeled mandibular distraction to achieve symmetry with the unaffected side.
• The proposed method aims to harmonize the pathological side with the healthy side along the medial sagittal plane.
• Achieving facial symmetry, bone balance, and horizontal occlusal plane orientation are key outcomes.

Conclusions:

• Bone distraction lengthening, when combined with meticulous pre-surgical planning and orthodontic coordination, offers a promising approach for treating facial hemi-atrophy.
• The developed simulation software aids in visualizing and planning the distraction process for improved surgical outcomes.
• This integrated approach is essential for achieving functional and aesthetic goals, including occlusal stability.