Frontal soft tissue analysis using a 3 dimensional camera following two-jaw rotational orthognathic surgery in skeletal class III patients

Choi, Jong Woo; Lee, Jang Yeol; Oh, Tae Suk; Kwon, Sophia; Yang, Sung Joon; Koh, Kyung

doi:10.1016/j.jcms.2013.05.004

Cited by 65 publications

(38 citation statements)

References 21 publications

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“…Posterior impaction of the maxilla decreases the bigonial width by upward setback of the mandible. 11 In this study, however, the bigonial width was not affected by the posterior impaction, probably because of changes in the Go landmark by resection of the overhang.…”

Section: Discussioncontrasting

confidence: 52%

“…9 Two other studies showed 3-4 mm of change between the soft tissue gonions up to 6 months after surgery using a threedimensional (3D) camera or laser scanner; however, their results were conflicting. 11,17 Various factors such as postoperative swelling, facial expression, muscle tone, and weight gain can affect soft tissue dimensions. The LMM showed that none of the variables investigated affected the lower facial width.…”

Section: Discussionmentioning

confidence: 99%

“…[7][8][9][10][11] Importantly, most of the data have indicated an initial increase followed by a continuous decrease. However, longterm evaluation is essential to determine when the width stabilizes.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Long-term changes in mandibular and facial widths after mandibular setback surgery using intraoral vertical ramus osteotomy

Choi

Lim

et al. 2016

International Journal of Oral and Maxillofacial Surgery

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Section: Discussioncontrasting

confidence: 52%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Long-term changes in mandibular and facial widths after mandibular setback surgery using intraoral vertical ramus osteotomy

Choi

Lim

et al. 2016

International Journal of Oral and Maxillofacial Surgery

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“…3D photogrammetry could be a potentially valuable tool in these specially, as it allows for analysis of frontal views, while it can be also rotated, translated and zoomed, providing realistic analyses as well as potential outcomes of the treatment. In contrast, the images of conventional 2D photogrammetry cannot be similarly manipulated …”

Section: Introductionmentioning

confidence: 99%

Accuracy and reliability of digital craniofacial measurements using a small‐format, handheld 3D camera

Kim

Chandiramani

et al. 2018

Orthod Craniofacial Res

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“…Although the reason was not entirely clear, certain factors might contribute to the relatively lower correlation and smaller ratios, including alterations in the maxillary bony landmarks during surgery, in particular, in the ANS after Le Fort I surgery. 12,13 This likely reduced the soft-to-hard tissue ratio and influenced the horizontal and, perhaps even, the vertical change. The subnasale is located at the junction of the soft and hard tissue over the maxilla and the nasal base.…”

Section: Discussionmentioning

confidence: 99%

Soft Tissue Changes Measured With Three-Dimensional Software Provides New Insights for Surgical Predictions

Chang

Ruellas

Yatabe

et al. 2017

Journal of Oral and Maxillofacial Surgery

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Purpose Although computer-aided craniofacial reconstructions allow for simulation of hard tissue changes, the prediction of the final soft tissue facial changes remains a challenge. The purpose of the present study was to evaluate the 3-dimensional (3D) soft tissue changes in patients undergoing 2-jaw orthognathic surgery. Patients and Methods For the present retrospective cohort study, 40 consecutive patients (11 men and 29 women; mean age 23.5 ± 4.9 years) who had undergone 2-jaw orthognathic surgery were selected. We obtained the medical and dental records from 3 weeks before surgery and 6 months after surgery. We used image processing software to segment, superimpose, and quantify the hard and soft tissue displacements in 3 dimensions before and after surgery at 15 paired locations. The soft tissue and hard tissue changes were determined through quantification of homologous landmark displacements between the preoperative and postoperative computed tomography data. We measured the 3D soft and hard tissue changes and the anteroposterior, inferosuperior, and transverse components of the changes. We quantified the ratios between the soft and hard tissue changes, tested Pearson’s correlation between these changes, and developed a predictive regression equation for the observations at each location. Results We found that soft tissue movement followed the hard tissue movement, with a correlation nearly equal to 0.9 (range 0.85 to 0.98), suggesting that in general the soft tissues of the maxillary and mandibular landmarks are affected similarly by the skeletal movements. The anteroposterior component of the soft tissue 3D displacements followed the hard tissue movement with a ratio greater than 0.9 and with high correlation (r > 0.9) in the mandible. Conclusion The results of the present study provide surgeons with a ratio of hard to soft tissue change and the strength of the correlations, which will allow for more accurate 3D predictions for both midline and lateral structures in bimaxillary orthognathic surgical cases. In addition, predictive equations for various landmarks were developed and can be used in computer-based prediction programs to aid in treatment planning of soft tissue changes.

show abstract

Frontal soft tissue analysis using a 3 dimensional camera following two-jaw rotational orthognathic surgery in skeletal class III patients

Cited by 65 publications

References 21 publications

Long-term changes in mandibular and facial widths after mandibular setback surgery using intraoral vertical ramus osteotomy

Long-term changes in mandibular and facial widths after mandibular setback surgery using intraoral vertical ramus osteotomy

Accuracy and reliability of digital craniofacial measurements using a small‐format, handheld 3D camera

Soft Tissue Changes Measured With Three-Dimensional Software Provides New Insights for Surgical Predictions

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