A 3-dimensional method for analyzing facial soft-tissue morphology of patients with jaw deformities

Terajima, Masahiko; Furuichi, Yoshihide; Aoki, Yoshimitsu; Goto, Tazuko K.; Tokumori, Kenji; Nakasima, Akihiko

doi:10.1016/j.ajodo.2007.06.017

Cited by 15 publications

(5 citation statements)

References 19 publications

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“…Overall, our 3D findings were similar to previous studies comparing cleft and non-cleft populations 15,29,34,35 . Patients with clefts demonstrated three significant dissimilarities to the other cohorts from a clinical standpoint, which included the cephalic rotation of the nasal tip (numerically represented by smaller columella angle and nasal length and greater columellar-labial angle and nasal protrusion), insufficient nasal tip projection (smaller nasal tip projection), and greater alar width.…”

Section: Discussionsupporting

confidence: 91%

“…FACE−Q and 3D image tools differentiated the enrolled cohorts for most of tested variables, while being consistent with previous findings 15,29,34,35 . Therefore, it may be possible that the presence of poor or the lack of significance for the tested correlations may not be associated to the incapacity of each tool to detect relevant features from the patient (nose and nostril appearance) and the abnormalities (clefts versus dentofacial deformities versus normal individuals).…”

Section: Discussionsupporting

confidence: 91%

“…The alar width-and nostrils-related features are key factors when the characteristics of Asian noses are placed into ethnical and cultural perspectives 15,29,34,35 . Unlike anatomical norms for Caucasian noses, Asians exhibit a flatter dorsum, a wider alar width, and a short nose in which there is much upward tilt of the nasal tip along with an increased nostril exposure 15,29,34,35 . Accordingly, Asians frequently request surgery to correct their typical, but not fully acceptable nose [36][37][38] .…”

Section: Discussionmentioning

confidence: 99%

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Patient- and 3D morphometry-based nose outcomes after skeletofacial reconstruction

Denadai

Chou

Seo

et al. 2020

Sci Rep

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Patient satisfaction with the shape and appearance of their nose after orthognathic surgery-based skeletofacial reconstruction is an important, but often overlooked, outcome. We assessed the nose-related outcomes through a recently developed patient-reported outcome instrument and a widely adopted 3D computer-based objective outcome instrument, to verify any correlation in the results produced by these tools. We collected FACE-Q nose appearance reports (2 scales) and 3D nasal morphometry (10 parameters) from patients with class III skeletal pattern and congenital cleft lip palate deformity (n = 23) or developmental dentofacial deformity (n = 23) after (>12 months) skeletofacial reconstruction. The cleft and dentofacial cohorts demonstrated significantly (p < 0.001) poorer satisfaction scores with regard to the FACE-Q nostrils scale than the normal age-, gender-, and ethnicity-matched subjects (n = 107), without any significant difference in FACE-Q nose scale. The cleft cohort had significantly (p < 0.001) smaller nasal length, nasal tip projection, and columellar angle and greater nasal protrusion, alar width, and columellar-labial angle values than the dentofacial and normal cohorts; however, there were no significant differences between the dentofacial versus normal cohorts. The FACE-Q nose and nostrils scales were significantly (p < 0.001; r = −0.26-0.27) correlated to the results of the 3D morphometric analysis, with regard to nasal length, alar width, columella angle, and columellar-labial angle parameters. This study revealed differences in satisfaction with the appearance of the nose according to the type of underlying deformity, and demonstrated a significant correlation (low correlation coefficients) between the patient-reports and 3D image-based outcome measure tools, which has implications for multidisciplinary-centered research, auditing, and clinical care. Facial deformities associated with abnormal maxillo-mandibular relationships, such as congenital cleft lip and palate and developmental dentofacial deformities, significantly affect oral function and facial aesthetics 1,2. Skeletofacial reconstruction using orthognathic surgery principle is a successful treatment modality for these abnormalities 3-5. However, a number of post-surgical facial modifications are the primary causes of concern among the patients, particularly changes in the nasal morphology 6. A growing number of studies have addressed this issue by adopting three-dimensional (3D) nasal measurements 6-15 , but the effects of skeletofacial reconstruction are beyond these imaging-guided outcome metrics 1,4,5. The patient satisfaction with the appearance of their nose is an important, albeit often overlooked, outcome parameter after orthognathic surgery. Therefore, including a patient's self-perception by employing patient-reported outcome (PRO) techniques may help clinicians to understand the health-related concerns of the patient 16,17. Literature reviews 4,5 have revealed that a plethora of PRO instruments have been utilized to primaril...

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

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Patient- and 3D morphometry-based nose outcomes after skeletofacial reconstruction

Denadai

Chou

Seo

et al. 2020

Sci Rep

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“…Although there have been numerous previous studies regarding the heritability of craniofacial structures, most investigations have focused on the heritability of skeletal tissue and dentition 12345678. A recent paradigm in the orthodontic field is soft tissue-based diagnosis 910. However, there has been a lack of heritability research regarding craniofacial soft tissues that determine actual facial appearance.…”

Section: Introductionmentioning

confidence: 99%

Influence of heritability on craniofacial soft tissue characteristics of monozygotic twins, dizygotic twins, and their siblings using Falconer's method and principal components analysis

et al. 2019

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ObjectiveThe purpose of this study was to investigate the influence of heritability on the craniofacial soft tissue cephalometric characteristics of monozygotic (MZ) twins, dizygotic (DZ) twins, and their siblings (SIB).MethodsThe samples comprised Korean adult twins and their siblings (mean age, 39.8 years; MZ group, n = 36 pairs; DZ group, n = 13 pairs of the same gender; and SIB group, n = 26 pairs of the same gender). Thirty cephalometric variables were measured to characterize facial profile, facial height, soft-tissue thickness, and projection of nose and lip. Falconer's method was used to calculate heritability (low heritability, h2 < 0.2; high heritability, h2 > 0.9). After principal components analysis (PCA) was performed to extract the models, we calculated the intraclass correlation coefficient (ICC) value and heritability of each component.ResultsThe MZ group exhibited higher ICC values for all cephalometric variables than DZ and SIB groups. Among cephalometric variables, the highest h2(MZ-DZ) and h2(MZ-SIB) values were observed for the nasolabial angle (NLA, 1.544 and 2.036), chin angle (1.342 and 1.112), soft tissue chin thickness (2.872 and 1.226), and upper lip thickness ratio (1.592 and 1.026). PCA derived eight components with 84.5% of a cumulative explanation. The components that exhibited higher values of h2(MZ-DZ) and h2(MZ-SIB) were PCA2, which includes facial convexity, NLA, and nose projection (1.026 and 0.972), and PCA7, which includes chin angle and soft tissue chin thickness (2.107 and 1.169).ConclusionsThe nose and soft tissue chin were more influenced by genetic factors than other soft tissues.

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“…Dental casts can be completed by dentition photos [2] or radiographies [3]. Other imaging tools can be used like CT-scan [4] [5] or face scan devices [6][7] [8][9] that provide additional information about soft tissues and face appearance, but still requiring dental casting. Anyway these techniques are not widespread because there are expensive and bulky.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Visual Registration Approaches of 3D Models for Orthodontics

Destrez

Albouy-Kissi

Treuillet

et al. 2011

Advanced Concepts for Intelligent Vision Systems

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International audienceWe propose to apply vision techniques to develop a main tool for orthodontics: the virtual occlusion of two dental casts. For that purpose, we process photos of the patient mouth and match points between these photos and the dental 3D models. From a set of 2D/3D matches of the two arcades, we calculate the projection matrix, before the mandible registration under the maxillary through a rigid transformation. We perform the mandible registration minimizing the reprojection errors. Two computation methods, depending on the knowledge of camera intrinsic parameters, are compared. Tests are carried out both on virtual and real images. In the virtual case, assumed as perfect, we evaluate the robustness against noise and the increase of performance using several views. Projection matrices and registration efficiency are evaluated respectively by reprojection errors and the differences between the rigid transformation and the reference pose, recorded on the six degrees of freedom

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A 3-dimensional method for analyzing facial soft-tissue morphology of patients with jaw deformities

Cited by 15 publications

References 19 publications

Patient- and 3D morphometry-based nose outcomes after skeletofacial reconstruction

Patient- and 3D morphometry-based nose outcomes after skeletofacial reconstruction

Influence of heritability on craniofacial soft tissue characteristics of monozygotic twins, dizygotic twins, and their siblings using Falconer's method and principal components analysis

Comparison of Visual Registration Approaches of 3D Models for Orthodontics

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