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Introduction <p>Following tooth extraction, alveolar bone resorption is observed as a result of decreased mechanical stimuli to the alveolar crest. In cases of horizontal alveolar bone deficiency where the alveolar bone width limits proper dental implant rehabilitation, the Khoury technique can be used to reconstruct atrofied bone.</p> Materials and Methods <p>In the finite element analysis (FEA) an autogenous bone block was fixed in horizontally atrofied alveolar bone and is exposed to 30&#xa0;N of linear force from its occlusal surface. Stresses that occured at the screw-bone interface and existing alveolar bone outer cortical shell were analysed. For these analyses, 22 models were created. Scenarios that were found to be biomechanically most efficient in FEA, were tested in 14 sheep hemimandibles using Universal Test Machine.</p> Results <p>Scenarios that were found to be most efficient in FEA were, in anterior short defects, two parallel screws and in posterior long defects, 3 parallel screws. In biomechanical testing, it was observed that cortical bone blocks could be fractured under 50,71 ± 3,86&#xa0;N force for anterior short defects and under 56,57 ± 5,62&#xa0;N force for posterior long defects.</p> Conclusion <p>Even though the patients do not chew on the grafted site, bone blocks used in the Khoury technique will be exposed to certain forces and the block might be fractured during occlusal forces. In order to minimize this complication, the need to fix the blocks with screws parallel to each other can be suggested.</p>

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Finite Element and Biomechanical Analysis of Bone Block Fixation in the Khoury Technique for Horizontal Alveolar Bone Deficiency: A Pilot Study

  • 期刊论文

  • 发表日期：

    2025年11月14日

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  • Begüm Elbir,
  • Abdullah Özel,
  • Seçkin Yalçın,
  • Mücahit Ergüneş,
  • Çağrı Delilbaşı

摘要

Introduction

Following tooth extraction, alveolar bone resorption is observed as a result of decreased mechanical stimuli to the alveolar crest. In cases of horizontal alveolar bone deficiency where the alveolar bone width limits proper dental implant rehabilitation, the Khoury technique can be used to reconstruct atrofied bone.

Materials and Methods

In the finite element analysis (FEA) an autogenous bone block was fixed in horizontally atrofied alveolar bone and is exposed to 30 N of linear force from its occlusal surface. Stresses that occured at the screw-bone interface and existing alveolar bone outer cortical shell were analysed. For these analyses, 22 models were created. Scenarios that were found to be biomechanically most efficient in FEA, were tested in 14 sheep hemimandibles using Universal Test Machine.

Results

Scenarios that were found to be most efficient in FEA were, in anterior short defects, two parallel screws and in posterior long defects, 3 parallel screws. In biomechanical testing, it was observed that cortical bone blocks could be fractured under 50,71 ± 3,86 N force for anterior short defects and under 56,57 ± 5,62 N force for posterior long defects.

Conclusion

Even though the patients do not chew on the grafted site, bone blocks used in the Khoury technique will be exposed to certain forces and the block might be fractured during occlusal forces. In order to minimize this complication, the need to fix the blocks with screws parallel to each other can be suggested.