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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

Erschienen in:

01.09.2021 | Original Article

Ramal inclination in the frontal plane after bimaxillary orthognathic surgery in skeletal class III facial asymmetry

Spontaneous changes and stability

verfasst von: Eun-Hye Park, Asst. Prof. Ae-Rim Ha, Assoc. Prof. Kyung-A Kim, Prof. Ki-Ho Park, Prof Yoon-Goo Kang

Erschienen in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie | Sonderheft 2/2023

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Abstract

Purpose

This study aimed to observe spontaneous changes of ramal inclination in the frontal plane (FRI) and its stability in skeletal class III asymmetry patients corrected with bimaxillary surgery. The correlation between FRI change and surgical skeletal change was also investigated.

Methods

Forty-nine patients with skeletal class III facial asymmetry who underwent orthognathic surgery with at least 1° change in FRI after surgery were analyzed. FRI and other factors were measured on frontal and lateral cephalograms before surgery (T1), after surgery (T2), and at follow-up after at least 6 months (T3). Correlation analysis was performed to determine pre- and postoperative factors associated with FRI change and stability.

Results

FRI increased significantly on the deviated side and decreased on the nondeviated side after surgery. The FRI changes remained stable during follow-up. No correlation between FRI changes and skeletal changes during surgery were found except between the change of FRI during follow-up (T3–T2) and mandibular setback amount (T2–T1), with a weak coefficient of 0.32.

Conclusion

The FRI changes after bimaxillary orthognathic surgery in skeletal class III asymmetry reduced the FRI difference between the deviated and nondeviated side and remained stable for at least 6 months after surgery. No clinically significant correlation was found between measured skeletal changes during surgery and FRI changes.

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Titel: Ramal inclination in the frontal plane after bimaxillary orthognathic surgery in skeletal class III facial asymmetry
Spontaneous changes and stability
verfasst von: Eun-Hye Park
Asst. Prof. Ae-Rim Ha
Assoc. Prof. Kyung-A Kim
Prof. Ki-Ho Park
Prof Yoon-Goo Kang
Publikationsdatum: 01.09.2021
Verlag: Springer Medizin
Erschienen in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie / Ausgabe Sonderheft 2/2023
Print ISSN: 1434-5293
Elektronische ISSN: 1615-6714
DOI: https://doi.org/10.1007/s00056-021-00344-9

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Ramal inclination in the frontal plane after bimaxillary orthognathic surgery in skeletal class III facial asymmetry

Spontaneous changes and stability