Precision of manual landmark identification between as-received and oriented volume-rendered cone-beam computed tomography images

Gupta, Abhishek; Kharbanda, Om Prakash; Balachandran, Rajiv; Sardana, Viren; Kalra, Shilpa; Chaurasia, Sushma; Sardana, Harish Kumar

doi:10.1016/j.ajodo.2016.06.027

Cited by 30 publications

(23 citation statements)

References 45 publications

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“…The definitions of craniofacial landmarks and measurements are provided in Table . Craniofacial morphology was analysed in three different planes—transverse, vertical and anteroposterior.…”

Section: Methodsmentioning

confidence: 99%

Analysis of the relationship between the morphology of the palate and facial skeletal patterns in Class III malocclusion using structural equation modelling

Ahn

Shin

Choi

et al. 2019

Orthod Craniofacial Res

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Structured Abstract Introduction The present study investigated the relationship between facial skeletal patterns and morphology of the palate in adult patients with Class III malocclusion using structural equation modelling (SEM). Setting and sample population One hundred cone beam computed tomography images of Class III adults were evaluated for skeletal measurements. Materials and methods The skeletal measurements were classified into the vertical, anteroposterior and transverse group based on factor analysis. 3D scanning model of the maxilla was analysed by Generalized procrustes analysis (GPA) and principal component analysis (PCA). Structural equation modelling was used to analyse relationship among the skeletal and morphometric factors. Results According to the factor analysis, latent variables were extracted by each skeletal variable. First principal component (PC1) and PC2 of palatal morphology were used to analyse relationship with skeletal variables. As results of the structural equation model, the transverse latent variable had the most influence on PC1, followed by vertical and anteroposterior variables. This result means that as the facial width increases, the palate becomes narrower, deeper and longer. Conclusions The relationship between the skeletal pattern with Class III malocclusion and palatal morphology was analysed through SEM. The transverse facial skeletal pattern showed the highest correlation with PC1 of palatal morphology.

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Section: Methodsmentioning

confidence: 99%

Analysis of the relationship between the morphology of the palate and facial skeletal patterns in Class III malocclusion using structural equation modelling

Ahn

Shin

Choi

et al. 2019

Orthod Craniofacial Res

View full text Add to dashboard Cite

show abstract

“…Moreover, landmark plotting on cone beam computed tomography (CBCT) images was demonstrably precise and reliable, 6 regardless of the head orientation. 7 Therefore, various studies have proposed different landmark-based MSPs: Damstra et al 8 suggested the MSP perpendicular to the Frankfort horizontal (FH) plane passing through the nasion (N) and sella; Green et al 9 recommended the MSP that passes through N, incisive foramen (IF), and basion (Ba); and Shin et al 10 proposed the MSP that features the N, anterior nasal spine (ANS), and posterior nasal spine (PNS). Although these diverse planes can be used to diagnose facial asymmetry, it is necessary to define one reference plane that can best approximate the true symmetrical MSP.…”

Section: Introductionmentioning

confidence: 99%

Comparison of three midsagittal planes for three-dimensional cone beam computed tomography head reorientation

Lee

et al. 2020

Korean J Orthod

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This study compared three prominent midsagittal planes (MSPs) to identify the MSP that best approximates the true symmetrical MSP. Methods: Forty-three patients (mean age, 23.0 ± 8.20 years) were grouped as follows: group 1 consisted of 10 patients with skeletal Class I and a menton (Me) deviation of < 2 mm; group 2, 11 patients with skeletal Class III and a Me deviation < 2 mm; group 3, nine patients with skeletal Class III and a Me deviation of 2 to less than 4 mm; and group 4, 13 patients with skeletal Class III and an Me deviation ≥ 4 mm. The candidate MSPs were established by three-dimensional (3D) cone beam computed tomography (CBCT) reorientation methods (RMs): (1) the MSP perpendicular to the Frankfort horizontal (FH) plane while passing through the crista galli and basion; (2) the MSP including the nasion, incisive foramen, and basion; (3) the MSP including the nasion, anterior nasal spine, and posterior nasal spine. The mean absolute distances (MADs) to the MSPs were calculated from the coordinates of 1,548 points on 129 CBCT images. The differences in the values of the 3D coordinates among RMs were compared. Results: The MADs of the three RMs showed significant differences (p < 0.05). Most of the differences in values of the coordinates were not significant among RMs. Conclusions: Although the differences in distance among the three MSPs were minor, the MSP perpendicular to the FH plane while passing through the crista galli and basion best approximated the true symmetrical MSP.

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“…The volume-rendered image was reoriented to make FH plane and transorbital plane horizontal although Gupta et al opined that such reorientations does not enhance the precision of landmark plotting. [ 28 ] CBCT allows clinically accurate and reliable 3D linear measurements of the craniofacial complex[ 29 ] and allows addition of new parameters postscan unlike USG. [ 15 ] Both hard and its homologous soft tissue images can be visualized simultaneously.…”

Section: Discussionmentioning

confidence: 99%

“…The 3D reconstructions along with transplanar cross-sections help in accurate identification of the landmark. [ 28 ]…”

Section: Discussionmentioning

confidence: 99%

Application of cone beam computed tomography in facial soft tissue thickness measurements for craniofacial reconstruction

Meundi¹,

David²

2019

J Oral Maxillofac Pathol

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Precision of manual landmark identification between as-received and oriented volume-rendered cone-beam computed tomography images

Cited by 30 publications

References 45 publications

Analysis of the relationship between the morphology of the palate and facial skeletal patterns in Class III malocclusion using structural equation modelling

Analysis of the relationship between the morphology of the palate and facial skeletal patterns in Class III malocclusion using structural equation modelling

Comparison of three midsagittal planes for three-dimensional cone beam computed tomography head reorientation

Application of cone beam computed tomography in facial soft tissue thickness measurements for craniofacial reconstruction

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