Abstract:
Background:Orthodontic diagnostic standards generally use the cranial base as a reference and rely on samples selected by orthodontists. Objective:The purpose of this study was to provide male and female standards for a novel non-radiographic approach for orthodontic diagnosis that utilizes 3D dentofacial photogrammetry using the eyes and natural head orientation as references instead of the cranial base. Methods:One hundred and eighty females and 200 males between the ages of 18 and 35 years from 2 modeling agencies were orthodontically screened for near ideal occlusion. Subjects that met the inclusion criteria were rated by a sample of 40 lay people for attractiveness on a visual analogue scale. The final sample that had 3D facial and dental imaging included 49 subjects 25 males and 24 females with near ideal occlusion and considered attractive by the public. Results:Inter and Intra-examiner ICC were greater than 0.8 for both landmarking and indexing. Relative to a coronal plane contacting the pupils (MC), the mean sagittal position of the alar curvature (representing the nasomaxillary complex) was 14.36 ± 3.08 mm in males and 12.4 ± 3.58 mm in females. The sagittal position of soft tissue pogonion relative to the pupils was 14.84 ± 3.63 mm in males and 12.78 ± 5.68 mm in females. The angle between the alar curvature and pogonion relative to the pupils was 9° in males and 10° in females. With the exception of the occlusal plane which was steeper in females, no ratios or angular facial measurements showed a significant gender difference. Relative to MC, males had more proclined upper incisors (20° vs 16°) and more retroclined Lower incisors (27° vs 31°; P > 0.05). A Procrustes ANOVA and permutation test showed that the shapes of males and females are different enough to be considered two distinct populations. Conclusions:1. When using the proposed method for orthodontic diagnosis, male and female patients should be compared to their respective dentofacial standards. 2. Validation of the proposed method and standards on an orthodontic population is underway to determine the scope its use.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Masoud MI,Bansal N,C Castillo J,Manosudprasit A,Allareddy V,Haghi A,Hawkins HC,Otárola-Castillo Edoi
10.1093/ejo/cjw055subject
Has Abstractpub_date
2017-04-01 00:00:00pages
215-225issue
2eissn
0141-5387issn
1460-2210pii
2452653journal_volume
39pub_type
杂志文章abstract::Soft tissue stretching has been proposed as one of the control factors in craniofacial morphogenesis. However, its mechanism remains unclear. The present study investigated electromyographic (EMG) activity and muscle fibre composition of cervical muscles following prolonged head extension in growing rats. Thirty-six m...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/25.1.21
更新日期:2003-02-01 00:00:00
abstract:Objectives:To assess arch width, palatal surface area, and volume in surgically treated unilateral cleft lip and palate (UCLP) in mixed dentition children in comparison with non-cleft lip and palate (NCLP) children using a 3D laser scanning. Materials and Methods:38 subjects (Caucasian origin), 5.63-11.9 years of age ...
journal_title:European journal of orthodontics
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abstract::Many more adults are undergoing orthodontic therapy than in the past. Since adult dentitions often exhibit diminished alveolar support, it is important to recognize the related apical migration of the dental centre of resistance when applying force systems to the teeth. The force system compensations necessary to prod...
journal_title:European journal of orthodontics
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更新日期:1993-02-01 00:00:00
abstract::The aim of this cross-sectional study was to determine the prevalence of malocclusions, occlusal traits, and their gender distribution in urban Iranian school children. Five hundred and two subjects (253 females and 249 males, aged 11-14 years) were examined. Molar relationship, overjet (OJ), overbite, midline deviati...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjp031
更新日期:2009-10-01 00:00:00
abstract:AIMS:To establish whether adolescent orthodontic patients with hypodontia have a preference between the aesthetic outcomes of two treatment strategies for lateral incisor agenesis. MATERIALS/METHODS:Standardized photographs of pre-orthodontic patients with missing lateral incisors were manipulated to produce images th...
journal_title:European journal of orthodontics
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abstract:SUMMARY:The purpose of this study was to assess the short-term psychosocial impact of dental aesthetic improvement in adult subjects. Sixty-nine adult patients (61 females and 8 males, aged 21-59 years) requesting aesthetic dental improvement were prospectively and randomly recruited for the study in a private orthodon...
journal_title:European journal of orthodontics
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abstract::A new appliance with samarium cobalt magnets embedded in unilateral blocks of acrylic is described, as a way of stimulating an autogenous costochondral graft, in a case with hemifacial microsomia. Laser scan images are used to illustrate a reversion towards facial soft tissue symmetry, over a 3-year period of treatmen...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/17.4.263
更新日期:1995-08-01 00:00:00
abstract::Unilateral tip-back mechanics are challenging because of a number of undesirable side-effects associated with their use during orthodontic treatment. The purpose of this paper is to review the differential diagnosis and treatment planning of Class II subdivision malocclusions and present a treatment strategy based on ...
journal_title:European journal of orthodontics
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更新日期:1997-02-01 00:00:00
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journal_title:European journal of orthodontics
pub_type: 杂志文章,随机对照试验
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更新日期:2011-08-01 00:00:00
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journal_title:European journal of orthodontics
pub_type: 评论,杂志文章
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更新日期:2015-08-01 00:00:00
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journal_title:European journal of orthodontics
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更新日期:2014-12-01 00:00:00
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journal_title:European journal of orthodontics
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doi:10.1093/oxfordjournals.ejo.a035984
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journal_title:European journal of orthodontics
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更新日期:2011-02-01 00:00:00
abstract::An analysis of the facial soft tissues is presented which permits aesthetic considerations of facial harmony and balance to be measured, and assessed quantitatively. The assessment is carried out in a practical and straight-forward manner, avoiding the measurement of angles. The visually determined Aesthetic Horizonta...
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pub_type: 杂志文章
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更新日期:1991-10-01 00:00:00
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更新日期:2005-04-01 00:00:00
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pub_type: 杂志文章
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更新日期:1995-06-01 00:00:00
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journal_title:European journal of orthodontics
pub_type: 杂志文章,随机对照试验
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更新日期:2019-03-29 00:00:00
abstract::The purpose of this study was to analyse the prevalence of ectopic eruption of maxillary first permanent molars in children with cleft lip and palate, and evaluate the influence of both local and genetic factors. Radiographs from 225 children, 125 girls and 100 boys, were studied. The prevalence in cleft children was ...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/15.6.535
更新日期:1993-12-01 00:00:00
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更新日期:2010-10-01 00:00:00
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更新日期:2013-02-01 00:00:00
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更新日期:2012-08-01 00:00:00
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更新日期:2005-10-01 00:00:00
abstract::Tissue shortage complicates the surgery of cleft palate (CP) anomalies. The healing of defects on the palate impairs growth of the dento-maxillary complex due to scar tissue formation. Implantation of grafts into the wound area might reduce this adverse effect of surgery. The aim of this study was to evaluate a cultur...
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更新日期:2008-02-01 00:00:00
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更新日期:2011-08-01 00:00:00
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journal_title:European journal of orthodontics
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2001-08-01 00:00:00
abstract::The purpose of this study was to determine whether an additional application of Fluor Protector before band cementation with glass ionomer cement reduces white spot formation compared with band cementation with glass ionomer cement. In the in vitro study, 80 premolars were divided in half, creating a control and a tes...
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pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1998-06-01 00:00:00
abstract::The effect of protruded mandibular function on the maxilla and zygoma was studied in young unilaterally condylectomized growing rats. Forty-eight-4-week-old rats were divided into two experimental and two control groups as follows: group A, 12 animals unilaterally condylectomized on the right side; the mandible was al...
journal_title:European journal of orthodontics
pub_type: 杂志文章
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更新日期:1997-04-01 00:00:00