Midsagittal Plane First: Building a Strong Facial Reference Frame for Computer-Aided Surgical Simulation

Grissom, Maggie K.; Gateño, Jaime; English, Jeryl D.; Jacob, Helder B.; Kuang, Tianshu; Gonzalez, Carla E.; Yuan, Peng; Deng, Hannah H.; Frick, Caleb J.; Kim, Daeseung; Xia, James J.

doi:10.1016/j.joms.2021.11.016

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…Recently, ANS-associated MSPs have been gathering attention. [3][4][5]10 Interestingly, to our knowledge, the above-mentioned dental compensation has been verified mainly using upper facial MSPs. In contrast, CBCT dental compensation studies using ANS-associated MSP are rare.…”

Section: Discussionmentioning

confidence: 87%

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Differences in positions of cone-beam computed tomography landmarks in patients with skeletal Class III facial asymmetry according to midsagittal planes

2023

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Objective: This study aimed to clarify differences in the positions of cone-beam computed tomography (CBCT) landmarks according to different midsagittal planes (MSPs) in patients with skeletal Class III facial asymmetry. Methods: Pre-treatment CBCT data from 60 patients with skeletal Class III were used. The patients were classified into symmetric (menton deviations of < 2 mm) or asymmetric (menton deviations of > 4 mm) groups. Six MSPs were established based on previous studies, and three-dimensional analyses were performed for the planes in both the groups. The measurement outcomes were compared statistically. Results: A statistically significant interaction (p < 0.01) was observed between MSPs and facial asymmetry. No significant differences were observed among MSPs in the symmetric group. However, significant differences in linear measurements were identified among MSPs in the asymmetric group. Specifically, the upper facial MSP revealed both maxillary and mandibular transverse asymmetries. On the other hand, anterior nasal spine (ANS)associated MSP could not identify maxillary asymmetry. Furthermore, the menton deviation was approximately 3 mm lower when estimated using the ANS-associated MSP than that using upper facial MSP. Conclusions: The choice of MSP can significantly affect treatment outcomes while diagnosing patients with asymmetry. Therefore, care should be taken when selecting MSP in clinical practice.

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Section: Discussionmentioning

confidence: 87%

“…The main research goal regarding cephalometric MSPs is to determine the optimal combination of landmarks and construction schemes. [2][3][4][5][6][7][8][9][10][11][12] Studies in the relevant literature have recommended several cephalometric MSPs. However, currently, there is no consensus on a cephalometric definition of MSP.…”

Section: Introductionmentioning

confidence: 99%

Differences in positions of cone-beam computed tomography landmarks in patients with skeletal Class III facial asymmetry according to midsagittal planes

2023

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“…Perhaps, in cases of severe craniofacial asymmetry accompanied by syndrome, the ANS-associated MSP that does not depend on the FH plane may be the clear alternative. 6,7 However, if the difference is subtle, it may not be easy to choose between the 2 types of MSP. In such cases, soft tissue may be the most important criterion.…”

Section: A3 As the Questioner Pointed Out The Vertical Position Diffe...mentioning

confidence: 99%

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Ahn

2023

Korean J Orthod

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Establishment of the mid-sagittal reference plane for three-dimensional assessment of facial asymmetry: a systematic review

Ajmera,

Singh,

Leung

et al. 2024

Clin Oral Invest

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Objective To systematically review the literature for mid-sagittal plane establishment approaches to identify the most effective method for constructing the mid-sagittal plane for the evaluation of facial asymmetry. Materials and methods Six electronic databases (PubMed, Medline (via Ovid), EMBASE (via Ovid), Cochrane Library, Web of Science, and Scopus) and grey literature were searched for the studies that computed the mid-sagittal reference plane three-dimensionally, using a combination of MeSH terms and keywords. The methodological quality and the level of evidence for the included studies were analyzed using QUADAS-2 and GRADE, respectively. Results The preliminary search yielded 6746 records, of which 42 articles that met the predefined inclusion criteria were included in the final analysis. All the included articles reported the construction of the mid-sagittal reference plane (MSP) using varied methods. The risk of bias and concerns regarding the applicability of the included studies were judged to be ‘low’. The level of evidence was determined to be ‘low’ for the effectiveness of the technique and ‘moderate’ for the ease of clinical applicability. Conclusion Despite methodological heterogeneity, this review substantiates the comparable efficacy of cephalometric and morphometric MSP construction methods. A fully automated morphometric MSP holds promise as a viable option for routine clinical use. Nevertheless, future prospective studies with an emphasis on the impact, accuracy, and clinical applicability of MSP construction techniques in cases of facial asymmetry are required. Clinical relevance The present review will assist clinicians in selecting the most suitable method for MSP construction, leading to improved treatment planning and ultimately more favorable treatment outcomes.

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Midsagittal Plane First: Building a Strong Facial Reference Frame for Computer-Aided Surgical Simulation

Cited by 5 publications

References 27 publications

Differences in positions of cone-beam computed tomography landmarks in patients with skeletal Class III facial asymmetry according to midsagittal planes

Differences in positions of cone-beam computed tomography landmarks in patients with skeletal Class III facial asymmetry according to midsagittal planes

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Establishment of the mid-sagittal reference plane for three-dimensional assessment of facial asymmetry: a systematic review

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