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The Establishment of a Murine Maxillary Orthodontic Model

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[A novel miniplate model for maxillary osteotomies].

F Boutault¹, O-R Diallo, F Jalbert

¹Service de chirurgie maxillofaciale et chirurgie plastique de la face, CHU de Toulouse-Purpan, place Baylac, 31059 Toulouse cedex, France. boutault.f@chu-toulouse.fr <boutault.f@chu-toulouse.fr>

Revue De Stomatologie Et De Chirurgie Maxillo-Faciale

|October 20, 2009

Summary

This study introduces a new miniplate for Le Fort I osteotomies, showing improved strength and adaptability. The novel design offers better clinical outcomes in orthognathic surgery.

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Area of Science:

Orthognathic Surgery
Biomaterials Engineering
Oral and Maxillofacial Surgery

Background:

Miniplates significantly improved orthognathic surgery, particularly Le Fort I osteotomies, enhancing technical aspects, recovery, and stability.
Accurate modeling of miniplates is challenging due to the difficulty in balancing malleability and rigidity.
A novel miniplate model was designed to address these limitations.

Purpose of the Study:

To evaluate the clinical performance of a newly designed miniplate for Le Fort I osteotomies.
To assess the balance between malleability and rigidity offered by the new miniplate model.
To compare the novel miniplate's efficacy against existing devices in orthognathic surgery.

Main Methods:

A novel 1mm thick miniplate with specific socket and bar design was developed.

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Mechanical testing demonstrated superior strength and adaptability compared to 0.6mm and standard 1mm plates.

A retrospective study of 180 patients undergoing Le Fort I osteotomy (with or without mandibular osteotomy) was conducted, excluding congenital abnormalities.

Main Results:

Bone healing occurred successfully in most patients within the expected timeframe.
One case of plate fracture and one case of slight upper jaw mobility post-device removal were noted.
No instances of material intolerance were observed in the patient cohort.

Conclusions:

The novel miniplate demonstrates improved performance compared to existing devices for Le Fort I osteotomies.
The design addresses challenges in rigid osteosynthesis, offering necessary rigidity, inconspicuousness, and good tolerance.
A limited range of three plate lengths simplifies inventory and cost, with mandatory use of four plates per surgery recommended.