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[Three-dimensional modeling of mandibular distraction].

L A Morgon¹, F Trunde, J L Coudert

¹Faculté de Chirurgie Dentaire de Lyon.

L' Orthodontie Francaise

|August 11, 2004

Summary

Facial hemi-atrophy treatment in children can be improved using bone distraction lengthening. This technique, combined with pre-surgical planning and orthodontic therapy, aims to achieve facial symmetry and occlusal stability.

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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.

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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.