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11.01.2023 | Original Article

Changes in strain energy density in the temporomandibular joint disk after sagittal split ramus osteotomy using a computed tomography-based finite element model

verfasst von: Kazuhiro Murakami, DDS, PhD, Kazuhiko Yamamoto, DDS, PhD, Masayoshi Kawakami, DDS, PhD, Satoshi Horita, DDS, PhD, Tadaaki Kirita, DDS, DMSc

Erschienen in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

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Abstract

Purpose

We evaluated the changes in the strain energy density (SED) in the temporomandibular joint (TMJ) disk after sagittal split ramus osteotomy (SSRO) at three time points. A finite element model (FEM) based on real patient-based computed tomography (CT) data was used to examine the effect of SSRO on the TMJ.

Methods

Measurements of the condylar position and angulation in CT images and FEM analyses were performed for 17 patients scheduled to undergo SSROs at the following time points: before surgery, immediately after surgery, and 1 year after surgery. SED on the entire disk was calculated at each of the three time points using FEM. Furthermore, the relationship between individual SED values and the corresponding condylar position was also evaluated.

Results

No significant change was observed in the condylar position at the three time points. The FEM analysis showed that SED was the highest and lowest immediately after and 1 year after surgery, respectively. A possible SED distribution imbalance between the left and right joints was improved 1 year after SSRO. Concerning the effect of fossa morphometry and condylar position, wide and deep glenoid fossae and a more posterior condylar position tended to show lower SED.

Conclusion

SED in the articular disk temporarily increased after surgery and significantly decreased 1 year after surgery compared with that before surgery. SSRO generally improved the imbalance between the left and right joints. Thus, SSRO, which improves maxillofacial morphology, may also improve components of temporomandibular disorders.
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Metadaten
Titel
Changes in strain energy density in the temporomandibular joint disk after sagittal split ramus osteotomy using a computed tomography-based finite element model
verfasst von
Kazuhiro Murakami, DDS, PhD
Kazuhiko Yamamoto, DDS, PhD
Masayoshi Kawakami, DDS, PhD
Satoshi Horita, DDS, PhD
Tadaaki Kirita, DDS, DMSc
Publikationsdatum
11.01.2023
Verlag
Springer Medizin
Erschienen in
Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie
Print ISSN: 1434-5293
Elektronische ISSN: 1615-6714
DOI
https://doi.org/10.1007/s00056-022-00441-3

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