Abstract:
:The aim of this prospective study was to quantify the display of the dentition through the soft tissue frame during speech using videography for different age groups. Two hundred and sixty-one subjects were initially screened and were divided into five groups: group 1 (G1) (15-19 years), G2 (20-29 years), G3 (30-39 years), G4 (40-49 years), and G5 (≥ 50 years). Groups were also made on the basis of gender and history of orthodontic treatment. Video equipment was used to capture video and each frame was analysed out of which two frames that best represented the maximal display of maxillary incisors (MDMI) during speech and the widest transverse display of dentition (WTDD) during speech were selected. The data obtained was analysed using one-way analyses of variance with Fisher's least significant difference post hoc test. MDMI and WTDD were found to be highly significant during speech across all age groups (P < 0.05). G1-G3 displayed approximately similar levels of maxillary incisor (P > 0.05) but was greater (P < 0.05) than G4 and G5. The buccal corridor showed significant differences as a function of age (P < 0.05). Orthodontic treatment had a significant impact on the display of the maxillary incisors (P < 0.05) but not on the buccal corridors (P > 0.05). Mandibular incisor display was relatively stable across G1-G3, increasing only for G4 and G5. It appears that the maximum display of maxillary incisors decreases with age and the decline is particularly rapid with increasing age. Females tend to display more teeth both in the transverse and vertical directions.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Jacobson A,Upadhyay M,Nanda Rdoi
10.1093/ejo/cjs084subject
Has Abstractpub_date
2013-10-01 00:00:00pages
689-95issue
5eissn
0141-5387issn
1460-2210pii
cjs084journal_volume
35pub_type
杂志文章abstract::Orthodontic treatment is mainly dependent on the loads developed by metal wires. The load developed by a buckled orthodontic wire is of great concern for molar distalization and cannot be simply derived from mechanical properties measured through classical tests (i.e. tensile, torsion, and bending). A novel testing me...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjm112
更新日期:2008-04-01 00:00:00
abstract::It is well known that mastication has a significant influence on mandibular growth and development, but the mechanism behind this effect has not yet been clarified. Furthermore, no studies have examined the effects of changes in mastication on the three-dimensional (3D) morphometry of the mandible. The aim of the pres...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjp060
更新日期:2010-02-01 00:00:00
abstract::Although there are numerous publications on bilateral non-compliance molar distalization appliances, there is limited information on problems such as asymmetrical unilateral Class II malocclusions. The aim of the present investigation was to examine the distalization of molars unilaterally in patients with a unilatera...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cji118
更新日期:2006-08-01 00:00:00
abstract::This study was undertaken to assess the factors affecting self-perception and the demand for orthodontic treatment among north Jordanian school children. In total, 1404 students randomly selected to represent five geographical areas of northern Jordan were examined. The students were further subgrouped according to ge...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjh094
更新日期:2005-06-01 00:00:00
abstract::The surface topography of 100 clinically used archwires of stainless steel, beta-, or nickel-titanium were investigated that had contacted either ceramic or stainless steel brackets. One group consisted of two sets: 60 wires with no treatment records accessed to bias analyses, and 40 wires for which extensive clinical...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/22.4.409
更新日期:2000-08-01 00:00:00
abstract:BACKGROUND:Although ceramic brackets have been extensively used for decades in orthodontics there is not till today any study focusing on the possible deterioration of mechanical properties after in vivo ageing. OBJECTIVES:To determine whether the mechanical properties of alumina orthodontic brackets change after intr...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjz024
更新日期:2020-01-27 00:00:00
abstract::The aim of this research was to evaluate the effect of the Delaire surgical technique on the midfacial morphology in a group of subjects with a congenital unilateral cleft of lip and palate (UCLP), prior to orthodontic treatment. Thirty-five UCLP (15 left and 20 right) patients (16 males and 19 females, mean age 7.03+...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjn068
更新日期:2009-02-01 00:00:00
abstract:AIM:To assess the risk of bias (RoB) in a subset of randomized controlled trials (RCTs) published in orthodontic journals using the Cochrane RoB tool and to identify associations between domain RoB assessment and treatment effect estimates. MATERIALS AND METHODS:Fifty consecutive issues of four major orthodontic journ...
journal_title:European journal of orthodontics
pub_type: 杂志文章,评审
doi:10.1093/ejo/cjv049
更新日期:2016-06-01 00:00:00
abstract::The Beni Solow award for the best article published in the European Journal of Orthodontics in 2014 has been won by: Karoline Dreesen, Steven Swinnen, Koenraad Devriendt, and Carine Carels from Departments of Orthodontics and Human Genetics, Katholieke Universiteit Leuven, Belgium and Department of Orthodontics and Cr...
journal_title:European journal of orthodontics
pub_type: 社论,历史文章
doi:10.1093/ejo/cjv043
更新日期:2015-08-01 00:00:00
abstract:AIM:To assess the prevalence of adjustment for confounding within statistical analysis and matching at the design stage in leading orthodontic journals and to explore potential associations between accounting for confounding and publication characteristics. MATERIALS AND METHODS:Twenty-four issues of four leading orth...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjv004
更新日期:2016-02-01 00:00:00
abstract::This study investigated the influence of changing the antero-posterior (AP) and vertical proportions of the lower face on the rankings of facial attractiveness. Four hundred and fifty-four (219 males and 235 females) native Jordanians of various ages and professions rated the attractiveness of a sequence of antero-pos...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjq028
更新日期:2011-02-01 00:00:00
abstract::The purpose of this study was to demonstrate the advantage of the finite helical axis (FHA) system in the biomechanical analysis of orthodontic tooth movement by comparing it with the rectangular coordinate (XYZ) system. Ten patients (6 females and 4 males, mean age 23 years 7 months) were selected. Maxillary canine r...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjm061
更新日期:2007-12-01 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
pub_type: 杂志文章
doi:10.1093/ejo/cjx019
更新日期:2017-11-30 00:00:00
abstract:OBJECTIVES:Assess facial asymmetry in subjects with unilateral cleft lip (UCL), unilateral cleft lip and alveolus (UCLA), and unilateral cleft lip, alveolus, and palate (UCLP), and to evaluate which area of the face is most asymmetrical. METHODS:Standardized three-dimensional facial images of 58 patients (9 UCL, 21 UC...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cju104
更新日期:2015-12-01 00:00:00
abstract::The location of the centre of resistance (CR) of various consolidated units of maxillary anterior teeth was determined in this study using human autopsy material. The units studied consisted of two central incisors, four incisors, and six anterior teeth. When horizontal forces were applied the CR for the two- and six-...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/13.6.452
更新日期:1991-12-01 00:00:00
abstract::The aim of this investigation was to determine the pattern of repair of root resorption regarding the location and type of tissue in adolescents after application of a well-controlled force magnitude. In 16 adolescents (mean age 13.8 years), the maxillary first premolars were buccally moved with a weekly reactivated f...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/20.6.727
更新日期:1998-12-01 00:00:00
abstract::Based on observations of longitudinal changes in dental arch dimensions, it has been stated that an individuality of arch form and an integrity of this form exists. However, longitudinal studies evaluating arch form changes have rarely been reported in the literature. The purpose of this investigation was to use a com...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/23.1.51
更新日期:2001-02-01 00:00:00
abstract:AIMS:The aim of this work was to investigate the effects of commonly used orthodontic appliances on the magnetic resonance (MR) image quality of the craniofacial region, with special interest in the soft palate and velopharyngeal wall using real-time speech imaging sequences and anatomical imaging of the temporomandibu...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cju103
更新日期:2015-12-01 00:00:00
abstract:OBJECTIVES:The Fränkel manoeuvre is a procedure by which the mandible of Class II individuals is postured forward in dental Class I relationship. The evaluation of the resulting facial profile provides information concerning the components determining the sagittal discrepancy. Data concerning the reproducibility of its...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjv072
更新日期:2016-08-01 00:00:00
abstract::This clinical study evaluated factors related to root resorption before (T1) and after (T2) orthodontic treatment. Ninety-six subjects between 9 and 34 years (34 males and 62 females) who had been treated using fixed appliances for at least 1 year and who had panoramic radiographs at T1 and T2 were selected. The relat...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjp165
更新日期:2010-12-01 00:00:00
abstract::This study, performed using a specially designed apparatus that included 10 aligned brackets, evaluated the frictional resistance generated by conventional stainless steel (SS) brackets (Victory Series), self-ligating Damon SL II brackets, Time Plus brackets, and low-friction ligatures (Slide) coupled with various SS,...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjm007
更新日期:2007-08-01 00:00:00
abstract::Using lateral cephalograms and a jaw movement-recording system, the relationship between the masticatory movement path and dentofacial morphology was investigated in 17 subjects (9 males and 8 females, mean age 23.5 years) without a history of orthodontic treatment. The masticatory movement path was measured at the ri...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjl036
更新日期:2007-02-01 00:00:00
abstract::The age- and gender-related shape variations of the craniofacial skeleton in skeletal Class I children were quantified using a Fourier analysis on the pre-treatment lateral head films of 122 orthodontic patients (age range 7-15 years), who were subdivided into six groups for sex and age (2-year intervals). Seven landm...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/19.6.669
更新日期:1997-12-01 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...
journal_title:European journal of orthodontics
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1093/ejo/20.3.219
更新日期:1998-06-01 00:00:00
abstract::A number of investigations have looked at psychological changes occurring in association with orthognathic treatment. However, most of these studies have used a pre-surgery questionnaire as the baseline measurement. There is little data relating to the true baseline, i.e. that prior to any active treatment. Until this...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/23.6.751
更新日期:2001-12-01 00:00:00
abstract:OBJECTIVES:During orthodontic arch expansion, the teeth are displaced against the perioral soft tissues. This can affect the equilibrium of forces that are thought to act on teeth, with consequent implications for long-term stability. The aim of this study was to investigate the effect of incremental lower lip advancem...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjt094
更新日期:2014-12-01 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
pub_type: 杂志文章
doi:10.1093/ejo/19.1.93
更新日期:1997-02-01 00:00:00
abstract::Some Class II malocclusions are due, at least in part, to a retruded lower dental arch relative to the mandibular body. The purpose of this study was to determine if a direct anterior force on the lower incisors could lead to bodily movement of these teeth. Twenty-seven patients (9 males, 18 females; mean age: 9.8 yea...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjn114
更新日期:2009-08-01 00:00:00
abstract::The objective of the present investigation was to determine the intrapulpal temperature changes and to compare the shear bond strength (SBS) of bondable buccal tubes bonded by high-intensity light sources. Ninety caries-free human first molar teeth extracted for periodontal reasons were used. For the temperature measu...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjn013
更新日期:2008-08-01 00:00:00
abstract::The objective of the present study was to evaluate the cytotoxicity and degree of monomer conversion of resin-reinforced glass ionomer cements (RGIC) over different time periods. Four RGICs: Fuji Ortho LC (FOLC), Fuji Ortho Band (FOB), Orthoglass (OGL), and Multicure Glass Ionomer (MCI) were evaluated for cytotoxicity...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjr009
更新日期:2012-06-01 00:00:00