Evaluation of Stability and Stress Distribution on Plate and Bone for Correction of Anterior Open Bite with Le Fort I Osteotomy: New Plate Design

Öz

Aim: Many different fixation methods have been proposed in the literature for the treatment of open bite. Beginning with the use of plates and screws, rigid fixation methods have become commonplace, however, open bite is a disorder prone to relapse despite rigid fixation. In our study, we aimed to eliminate the need for guided split usage during surgery and to increase postoperative stabilization in open bite patients with a new personalized plate design. Material and Method: For this purpose, a three-dimensional (3D) head model was created in the virtual environment. After the Le Fort I osteotomy on the model, the inferior segment of the maxilla was placed 1 cm forward and positioned to leave a space between the inferior and superior part of the maxilla. Different fixation methods were applied to fix the bone segments. In the first group, four plates with a thickness of 0.8 mm were fixed. In the other groups, we used three different thicknesses (0.4 mm, 0.6 mm, 0.8 mm) of the continuous plate we designed. The amount of movement and tension that occurred on the bone segments, plates, and screws were evaluated. Results: The maximum movement in the study was observed with the standard 4-plate fixation method, and the minimum movement was observed with the custom plate system with 11-screw type with a thickness of 0.8 mm. As a result, it has been found that the custom-made continuous plates provide a more rigid fixation than the standard plates. Conclusion: It may be possible to reduce the likelihood of a relapse problem by designing a plate with the appropriate thickness and form to spread the stress on the bone over a wider area.

Anahtar Kelimeler

• Orthognathic surgery
• bone fixation
• Le Fort I osteotomy

Kaynakça

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