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. 2018 Oct 5;14(1):21.
doi: 10.1186/s13005-018-0179-z.

Three dimensional evaluation of soft tissue after orthognathic surgery

Junho Jung  1 , Chi-Heun Lee  1 , Jung-Woo Lee  1 , Byung-Joon Choi  2
Affiliations

Three dimensional evaluation of soft tissue after orthognathic surgery

Junho Jung et al. Head Face Med. .

Abstract

Background: To evaluate the nasolabial soft tissue change three-dimensionally after orthognathic surgery, using a structured light scanner.

Methods: Thirty-two malocclusion patients, who underwent orthognathic surgery, were evaluated. CBCT and 3D facial scans were obtained before surgery and 3 months after surgery. The 3D changes in the 26 landmarks, and the relative ratio of the soft tissue movement to the bony movement, were evaluated.

Results: In the Le Fort I advancement patients, the nasal tip moved 17% forward, compared to the maxillary bony movement, but the nasal prominence decreased 15%. The alar width increased 4 mm after the advancement, and the width decreased 4.7 mm after Le Fort I setback. The relative ratio of the soft tissue movement to the bony movement after bilateral sagittal split osteotomy was about 66% at the Li point in the anteroposterior direction, and it was 21% in the Le Fort I advancement and 14% in Le Fort I setback at the Ls point.

Conclusion: Alar cinch suturing may not be sufficient to overcome the effect of the maxilla advancement compressing the nasal complex. Alar width widening was prevented in Le Fort I setback. However, it is uncertain that the alar cinch suturing was solely responsible. The soft tissue around the mandible tends to accompany the bony movement more than the maxillary area. In addition, structured light scanning system proved to be a useful tool to evaluate the nasolabial soft tissue.

Keywords: 3D measurement; Nasolabial soft tissue; Orthognathic surgery; Structured light-based scanners.

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Conflict of interest statement

Ethics approval and consent to participate

This study was approved by the Ethics Committee at the Kyung Hee University Dental Hospital (KHD IRB 1603–4).

Consent for publication

Not applicable.

Competing interests

The authors declare, that they have no competing interests.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
(a) Three-dimensionally reconstructed facial image and twenty-six landmarks around the nasolabial tissue. (b) A superimposed color map image of facial soft tissue change after orthognathic surgery
Fig. 2
Fig. 2
Twenty-six landmarks around the nasolabial tissue [12]
Fig. 3
Fig. 3
The relative ratio of the soft tissue movement to the bony movement in the anteroposterior direction after Le Fort I advancement osteotomy (%)
Fig. 4
Fig. 4
The relative ratio of the soft tissue movement to the bony movement in the anteroposterior direction after Le Fort I setback osteotomy (%)
See this image and copyright information in PMC

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