Adolescent dental arch development among Southern Chinese in Hong Kong: a geometric morphometric approach

Wen, Yi Feng; Wong, Hai Ming; Pei, Tao; McGrath, Colman

doi:10.1038/s41598-019-55073-2

Cited by 3 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12,19 The previous studies showed the greatest incremental increases occurred in the maxillary and mandibular anterior and posterior arch widths in both male and female infants during the first 2 years of life, and mandibular intercanine width, on average, was established by 8 years of age. [22][23][24] Our group has concentrated on exploring and addressing the impact on maxilla development caused by palate cleft itself, timing, and protocols of cleft palate repair as well as palatoplasty methods. 12,19,25,26 However, the eventual shape of the maxillary arch architecture after palatoplasty is unknown.…”

Section: Discussionmentioning

confidence: 99%

Intraoral Scanning Evaluation of Maxillary Arch Changes after Modified Sommerlad Palatoplasty for around Three Years

Li¹,

Tao²,

Yao³

et al. 2023

Plastic &Amp; Reconstructive Surgery

View full text Add to dashboard Cite

left palate is a common congenital condition that can affect speech, hearing, eating, and appearance. 1,2 Even after surgical treatment, patients with cleft palate might retain secondary deformities, such as midface concavity, crossbite, maxillary arch stenosis, and dentition crowding, attributable to multiple factors. [3][4][5] Palatoplasty is a significant factor that causes growth and development deficiency. The ideal surgical outcome of cleft repair should be velopharyngeal closure for speech recovery, preservation of facial growth, and proper dental development. However, achieving normal speech and minimizing the effects on maxillary growth restriction have proven a Background: The purpose of this study was to investigate dental arch changes after modified Sommerlad palatoplasty in patients with cleft palate by intraoral scanning technique in children with early deciduous dentition. Methods: This study included 60 patients with nonsyndromic unilateral complete cleft lip with palate or cleft palate only treated by modified Sommerlad palatoplasty without relaxed excision before 18 months of age and 95 healthy controls without cleft. Three-dimensional images of the maxillary dental arches of all participants at age 3 to 4 years were obtained by intraoral scanning technique. Seven parameters (anterior dental arch width, middle dental arch width, posterior dental arch width, anterior palatal arch width, posterior palatal arch width, anterior dental arch length, and entire dental arch length) were measured.Results: Compared with the male group, the posterior palatal arch width distance of controls in the female group decreased significantly (P = 0.039), and the middle dental arch width, posterior dental arch width, and posterior palatal arch width distance of female patients decreased (P = 0.013, P = 0.002, P = 0.005, respectively). The anterior dental arch length and entire dental arch length distance of children in the unilateral complete cleft lip with palate group was shorter than those of children with cleft palate only (P < 0.0001, P < 0.0001, respectively). The patient group showed decreased distance of anterior dental arch width, anterior palatal arch width, anterior dental arch length, and entire dental arch length, and increased distance of posterior dental arch width and posterior palatal arch width compared with the control group (P = 0.0002, P = 0.002, P < 0.0001, P < 0.0001, P = 0.007, P = 0.027, respectively). Conclusion:The results indicated that the modified palatoplasty group showed no growth inhibition in the middle or posterior dental arch width, or palatal arch width, but slight but significant inhibition in the length of the anterior and entire dental arch.

show abstract

Section: Discussionmentioning

confidence: 99%

Intraoral Scanning Evaluation of Maxillary Arch Changes after Modified Sommerlad Palatoplasty for around Three Years

Li¹,

Tao²,

Yao³

et al. 2023

Plastic &Amp; Reconstructive Surgery

View full text Add to dashboard Cite

show abstract

“…The size and shape of dental arches and their influence on arch relationships have significant orthodontic implications, as they can affect available space, smile aesthetics, and long-term occlusal stability [ 1 ]. Orthodontic treatment can alter the shape of the dental arch; any changes, however, should not disrupt the balance between bone, dental, and muscular structures, as deviations from the original shape of the dental arch may increase the tendency for treatment to relapse [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

“…Orthodontic treatment can alter the shape of the dental arch; any changes, however, should not disrupt the balance between bone, dental, and muscular structures, as deviations from the original shape of the dental arch may increase the tendency for treatment to relapse [ 2 ]. The shape of the dental arch is determined by the underlying skeletal morphology, the eruption pathway of teeth, the surrounding soft tissues, and intraoral functional forces [ 1 , 3 ]. Discordance between the shapes of the dental arches may lead to malocclusion.…”

Section: Introductionmentioning

confidence: 99%

The genetic and environmental contributions to variation in the permanent dental arch form: a twin study

Lin,

Hughes,

Meade

2023

European Journal of Orthodontics

View full text Add to dashboard Cite

Objective The objective of this study was to examine the relative contributions of genetic and environmental influences on variation in dental arch form in individuals who have largely completed their craniofacial growth. Material and methods The subjects of this study comprised dental casts of 50 monozygotic twins and 24 dizygotic twins from the collection of records of twins housed at the Adelaide Dental School, Australia. The subjects were of Western European descent, with an average age of 20.93 ± 5.58 years. Dental casts were scanned using a 3D scanner to analyse the dental arch form. Landmark-based inter-arch and intra-arch measurements were performed. Structural equation modelling was employed to analyse the quantitative data using the normal assumptions of the twin model. Results Genetic modelling revealed that additive genetic and unique environmental factors best explained the observed variation for all occlusal traits measured, except for mandibular intercanine width. High heritability was observed for most intra-arch occlusal variables (0.61–0.85) including the maxillary and mandibular intercanine and intermolar widths, arch depth and perimeter. In contrast, moderate heritability was found for inter-arch occlusal variables (0.52–0.59) such as overjet and overbite. Sexual dimorphism was evident, with males displaying larger posterior arch width than females (P < 0.05). Limitations Our sample was limited to individuals of Western European ancestry. Conclusion The predominant source of occlusal variation within this group of Australian twins of Western European descent was controlled by genetic effects, and most were highly heritable. Generally, intra-arch occlusal variables showed greater heritability compared with inter-arch occlusal variables.

show abstract

Maxillary dimensions and arch shape with palatally displaced canines

Saade

Arai

Motro

et al. 2023

European Journal of Orthodontics

View full text Add to dashboard Cite

Summary Background/objectives The aim of this study was to explore the effect of palatally displaced canines on maxillary dimensions and arch shape. Methods Occlusal and skeletal landmarks were plotted on cone beam computed tomography (CBCT) images of 156 orthodontic patients: 78 with palatally displaced canines (PDC) (27 left, 28 right, and 23 bilateral) and 78 controls using Mimics™ (Materialise, Belgium). Arch forms were created, and arch width, depth, and skeletal dimensions were measured. T-test (P < 0.05) was used to compare the groups. Geometric Morphometrics (GM) analysis was used to compare the groups and to explore the pattern of covariation between two sets of landmarks. Results The unilateral PDC group showed an increased first premolar, second premolar, molar widths, and an increased molar depth. No significant difference was found in arch form. The skeletal measurements were generally larger in the PDC group, but the transverse measurements were the most significant. Discriminant Function Analysis (DFA) with cross-validation allowed an accurate classification of 85.9% of the control group and 66.7% of the PDC group. The Mahalanobis distance displayed significant differences among three combinations of groups. Strong covariance was found between the second premolar and all other landmarks. Limitations The small sample sizes of the stratified groups precluded recognition of statistical significance. Conclusions Patients with unilateral PDC displayed significantly wider first, second premolar, and first molar widths, and increased first molar depths. There were no significant differences in arch form; however, GM showed significant differences between the groups and a prominent covariance function for the 2nd premolars.

show abstract

Adolescent dental arch development among Southern Chinese in Hong Kong: a geometric morphometric approach

Cited by 3 publications

References 25 publications

Intraoral Scanning Evaluation of Maxillary Arch Changes after Modified Sommerlad Palatoplasty for around Three Years

Intraoral Scanning Evaluation of Maxillary Arch Changes after Modified Sommerlad Palatoplasty for around Three Years

The genetic and environmental contributions to variation in the permanent dental arch form: a twin study

Maxillary dimensions and arch shape with palatally displaced canines

Contact Info

Product

Resources

About