EVALUATION OF 3 DIFFERENT FIXATION TECHNIQUES FOR SAGITTAL SPLIT RAMUS OSTEOTOMY USING 3D FINITE ELEMENT ANALYSIS: A PILOT STUDY

Background and Aim: The aim of this study was to compare 3 different internal rigid fixation techniques for sagittal split ramus osteotomy using 3D finite element analysis. Materials and Methods: A computed tomography scan of a healthy patient was used to generate the geometry of the mandible. A miniplate, a monocortical screw and a bicortical screw were designed and combined with the mandible for the creation of 3 different models. A load of 200 N was applied from the incisor teeth to evaluate the stress on the fixation appliances and bone. Results: The highest stress was detected on miniplate system and the least stress was on the inverted L system. The stress values were similar in the hybrid and inverted L systems while the hybrid system displayed the least displacement, and the miniplate system yielded the maximum displacement. Conclusion: The results of our study suggest that the hybrid system is a safe and reliable fixation technique with sufficient stability of the fragments, and it causes relatively low stress and less displacement.

SAGİTTAL SPLİT RAMUS OSTEOTOMİSİNDE 3 FARKLI FİKSASYON TEKNİĞİNİN SONLU ELEMAN ANALİZİ İLE KARŞILAŞTIRILMASI: PİLOT ÇALIŞMA

Amaç: Bu çalışmanın amacı sagittal split ramus osteotomisinde kullanılan 3 farklı internal fiksasyon tekniğinin 3 boyutlu sonlu eleman analizi ile karşılaştırılmasıdır. Gereç ve Yöntem: Sağlıklı bireyin bilgisayarlı tomografi görüntülerinden elde edilen mandibula modellerinde; miniplak, monokortikal vida ve bikortikal vida tasarımları 3 farklı fiksasyon tekniği oluşturmak için kullanıldı. Fiksasyon sistemleri ve kemik üzerinde oluşan stresi değerlendirmek için alt kesici dişlerden 200N kuvvet uygulandı. Bulgular: En yüksek stres miniplak sisteminde en düşük stres ise ters L sisteminde ölçüldü. Ters L ve hibrit sistemlerinde stres değerleri benzer olmakla birlikte, hibrit sistemde daha az yer değiştirme olduğu görüldü. En fazla yer değiştirme miniplak sisteminde oluştu. Sonuç: Bu çalışma sonucunda hibrit sistemin güvenilir bir teknik olduğu, fragmanlar arasında yeterli stabilite sağladığı, daha az stres ve yer değiştirmeye neden olduğu görülmüştür.

Kaynakça

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