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Maxillary stability after Le Fort I osteotomy using three different plate systems.

K Ueki¹, K Okabe, A Moroi

¹Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kanazawa University, Japan. kueki@med.kanazawa-u.ac.jp

International Journal of Oral and Maxillofacial Surgery

|April 28, 2012

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This study compared maxillary stability after Le Fort I osteotomy using unsintered hydroxyapatite/poly-L-lactic acid (u-HA/PLLA), PLLA, and titanium plates. All fixation methods provided satisfactory results, with minor differences observed between u-HA/PLLA and PLLA plates.

Area of Science:

Oral and Maxillofacial Surgery
Biomaterials Science
Orthognathic Surgery

Background:

Le Fort I osteotomy is a common procedure for correcting midface deformities.
Plate fixation is crucial for maintaining maxillary stability post-osteotomy.
Evaluating different biomaterials for plate fixation is essential for optimizing surgical outcomes.

Purpose of the Study:

To compare postoperative maxillary stability following Le Fort I osteotomy.
To evaluate stability using three fixation methods: unsintered hydroxyapatite (u-HA)/poly-L-lactic acid (PLLA) plates, PLLA plates, and titanium plates.

Main Methods:

Sixty Japanese patients with mandibular prognathism underwent Le Fort I and bilateral sagittal split ramus osteotomies.
Patients were randomized into three groups (n=20 each) using u-HA/PLLA, PLLA, or titanium plates for fixation.

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Postoperative maxillary stability was assessed using lateral and posteroanterior cephalography at various time points.

Main Results:

The u-HA/PLLA group showed significantly greater changes in mx1-S perpendicular to SN between 3 and 12 months compared to the PLLA group (P=0.0269).
The u-HA/PLLA group also exhibited significantly greater changes in S-A perpendicular to SN between baseline and 1 month compared to the PLLA group (P=0.0257).
No significant differences were found in other measured parameters between the groups.

Conclusions:

Satisfactory maxillary stability can be achieved with u-HA/PLLA, PLLA, and titanium plate fixation after Le Fort I osteotomy.
A slight difference in maxillary stability was noted between the u-HA/PLLA and PLLA plate systems.
Further research may be warranted to fully elucidate the long-term stability differences between these biomaterials.