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Related Concept Videos

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Related Experiment Video

Updated: Apr 14, 2026

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Evaluation of bone formation after sagittal split ramus osteotomy using different fixation materials.

Koichiro Ueki1, Yuri Ishihara1, Kunio Yoshizawa1

  • 1Department of Oral and Maxillofacial Surgery, Division of Clinical Medicine, Graduate Faculty of Interdisciplinary Research, University of Yamanashi, 1110, Shimokato, Chuoshi 409-3821, Japan.

Journal of Cranio-Maxillo-Facial Surgery : Official Publication of the European Association for Cranio-Maxillo-Facial Surgery
|April 19, 2015
PubMed
Summary

Different fixation materials significantly impact bone healing after sagittal split ramus osteotomy (SSRO). Titanium and absorbable plates, with or without calcium phosphate, showed varied bone changes, affecting ramus width and square dimensions over time.

Keywords:
Bone formationComputed tomographyFixation materialSagittal split ramus osteotomy

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Area of Science:

  • Oral and Maxillofacial Surgery
  • Orthognathic Surgery
  • Biomaterials in Surgery

Background:

  • Sagittal split ramus osteotomy (SSRO) is a common procedure in orthognathic surgery.
  • Fixation materials play a crucial role in the stability and bone healing after osteotomies.
  • Understanding the impact of different fixation methods on bony changes is essential for optimizing surgical outcomes.

Purpose of the Study:

  • To evaluate and compare bony changes in the proximal and distal segments following SSRO.
  • To investigate the influence of various fixation materials on bone healing and dimensional stability after SSRO.

Main Methods:

  • A cohort of 74 patients (148 sides) undergoing SSRO (with or without Le Fort I osteotomy) were analyzed.
  • Patients were categorized into five fixation groups: mono-cortical titanium (MT), mono-cortical absorbable (MA), bi-cortical absorbable (BA), MA with α-tricalcium phosphate (MAα), and BA with α-tricalcium phosphate (BAα).
  • Computed tomography (CT) was used to measure ramus square (RmS), ramus width (RmM-RmL), and ramus length (RmA-RmP) pre-operatively, immediately post-operatively, and at 1-year follow-up.

Main Results:

  • Significant differences in the change over time were observed among the groups for ramus square (RmS; p=0.0126) and ramus width (RmM-RmL; p=0.0001).
  • No significant differences were found among the groups regarding the change over time in ramus length (RmA-RmP).

Conclusions:

  • The choice of fixation material significantly influences the bone healing process and dimensional stability after SSRO.
  • Different fixation strategies result in varying degrees of bony remodeling, particularly affecting ramus width and square dimensions.