Initial changes of centres of rotation of the anterior segment in response to horizontal forces.

Abstract:

:This study investigated the changes in the initial centres of rotation (Crot) of the upper six anterior teeth in response to a horizontal load. Six upper anterior teeth were extracted, splinted as a unit, and embedded in dental stone after the roots were uniformly coated with silicone. An aluminium fixture was bonded to the anterior segment and three linear variable differential transformers (LVDTs) were attached to measure the microdisplacement of the segment. A pulley and dead weight assembly were used to apply a 200 g occluso-gingivally varying horizontal force to the segment. The changes in the Crot for the anterior segment to the horizontal load were recorded. The results showed that the centre of resistance (Cres) of the upper anterior segment was located 14.5 mm apical and 9.5 mm distal from the incisal edge of the central incisors. A linear functional axis (a trace of the measured Crot) was recorded. The functional axis maintained an angle of 14.5 degrees to the vertical axis of the anterior segment passing through the Cres of the segment. The Crot constant, which determines the tipping sensitivity of the segment, was 23 mm(2). The results demonstrate that the upper anterior segment may be slightly intruded when a horizontal force is applied and is less prone to tipping than a single tooth.

journal_name

Eur J Orthod

authors

Choy K,Kim KH,Burstone CJ

doi

10.1093/ejo/cjl023

subject

Has Abstract

pub_date

2006-10-01 00:00:00

pages

471-4

issue

5

eissn

0141-5387

issn

1460-2210

pii

cjl023

journal_volume

28

pub_type

杂志文章
  • The influence of miniscrew insertion torque.

    abstract:Objective:The aim of this in vitro study was to evaluate the progressive development of surface microdamage produced following the insertion of orthodontic miniscrews (OMs) into 1.5 mm thick porcine tibia bone using maximum insertion torque values of 12 Ncm, 18 Ncm, and 24 Ncm. Methods:Aarhus OMs (diameter 1.5 mm; len...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjx026

    authors: Nguyen MV,Codrington J,Fletcher L,Dreyer CW,Sampson WJ

    更新日期:2018-01-23 00:00:00

  • Evaluation of the variable anchorage straightwire technique using Ricketts' growth prediction.

    abstract::The purpose of this retrospective study was to evaluate the treatment effects of the variable anchorage straightwire technique (VAST) in Angle Class II patients using Ricketts' growth prediction analysis. The subjects belonged to two groups: a control, consisting of 30 untreated Class II Swedish individuals (20 girls,...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjn038

    authors: Parikakis KA,Moberg S,Hellsing E

    更新日期:2009-02-01 00:00:00

  • Comparison of the efficacy of tooth alignment among lingual and labial brackets: an in vitro study.

    abstract:Background/objective:The aim of this study was to evaluate the efficacy of tooth alignment with conventional and self-ligating labial and lingual orthodontic bracket systems. Materials/methods:We tested labial brackets (0.022″ slot size) and lingual brackets (0.018″ slot size). The labial brackets were: (i) regular tw...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjy005

    authors: Alobeid A,El-Bialy T,Reimann S,Keilig L,Cornelius D,Jäger A,Bourauel C

    更新日期:2018-11-30 00:00:00

  • The use of debonding microspheres in electrothermal debonding.

    abstract::The aim of this study was to investigate if debonding microspheres (DM) could enhance electrothermal orthodontic debonding, and specifically to evaluate if the addition of DM, in varying concentrations to the orthodontic adhesive process, will affect bond strength. Bovine teeth (n=8) were mounted in acrylic using a si...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjq091

    authors: Swinburne ML,Willmot D,Patrick D

    更新日期:2011-08-01 00:00:00

  • Advancement of the premaxilla with distraction osteogenesis.

    abstract:OBJECTIVES:The aim of this study was to evaluate the effects of premaxillary advancement with distraction osteogenesis (DO) on the skeletal, dental, and soft tissues. MATERIALS AND METHODS:A total of 21 cases with Angle class I molar relationship and negative overjet or edge-to-edge incisor relationship were included....

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjt056

    authors: Cakmak F,Turk T,Sumer M

    更新日期:2014-06-01 00:00:00

  • The functional status of orthodontically treated prognathic patients.

    abstract::In order to study the prevalence of mandibular dysfunction in orthodontically treated prognathic patients after retention, 60 randomly selected patients were examined clinically. The functional status of the patients was evaluated using the anamnestic, clinical dysfunction index, and the index for occlusal status intr...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/13.2.124

    authors: Gavakos K,Witt E

    更新日期:1991-04-01 00:00:00

  • Degree of conversion and hardness of an orthodontic resin cured with a light-emitting diode and a quartz-tungsten-halogen light.

    abstract::The purpose of this study was to assess the influence of two light units, a quartz-tungsten-halogen (QTH) and a light-emitting diode (LED), on the hardness and degree of conversion of an orthodontic composite resin. Sixty specimen disks were prepared from Transbond XT composite resin (3M Unitek) and light cured for 10...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjp048

    authors: Cerveira GP,Berthold TB,Souto AA,Spohr AM,Marchioro EM

    更新日期:2010-02-01 00:00:00

  • An in vitro investigation of the influence of self-ligating brackets, low friction ligatures, and archwire on frictional resistance.

    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

    authors: Tecco S,Di Iorio D,Cordasco G,Verrocchi I,Festa F

    更新日期:2007-08-01 00:00:00

  • Bone-anchored maxillary protraction in unilateral cleft lip and palate: a cephalometric appraisal.

    abstract:OBJECTIVES:The aim of this study was to evaluate the cephalometric outcome of bone-anchored maxillary protraction (BAMP) in individuals with unilateral complete cleft lip and palate (UCLP). MATERIAL AND METHODS:The experimental group (EG) comprised 23 individuals (17 males and 6 females) with UCLP and a mean age of 11...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjz005

    authors: Faco R,Yatabe M,Cevidanes LHS,Timmerman H,De Clerck HJ,Garib D

    更新日期:2019-09-21 00:00:00

  • Smartphone application-assisted oral hygiene of orthodontic patients: a multicentre randomized controlled trial in adolescents.

    abstract:OBJECTIVE:The aim of this trial was to test whether the use of a smartphone application (app) connected to a toothbrush improves the oral hygiene compliance of adolescent orthodontic patients. DESIGN:The study was designed as a multicentre, randomized, controlled clinical trial. SETTING:Two academic hospitals. ETHIC...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjz105

    authors: Deleuse M,Meiffren C,Bruwier A,Maes N,Le Gall M,Charavet C

    更新日期:2020-02-01 00:00:00

  • White spot formation under orthodontic bands cemented with glass ionomer with or without Fluor Protector.

    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

    authors: van der Linden RP,Dermaut LR

    更新日期:1998-06-01 00:00:00

  • Long-term effect of neonatal endotracheal intubation on palatal form and symmetry in 8-11-year-old children.

    abstract::Premature and low birth weight infants often require neonatal oral intubation for resuscitation and to relieve respiratory distress. The endotracheal tube exerts pressure on the developing palate, which can result in palatal groove formation, a high-arched palate, and palatal asymmetry. The purpose of this investigati...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/21.6.703

    authors: Macey-Dare LV,Moles DR,Evans RD,Nixon F

    更新日期:1999-12-01 00:00:00

  • The relationship between hard and soft tissue changes following treatment of Class II division 1 malocclusions using Edgewise and Fränkel appliance techniques.

    abstract::Lateral-skull radiographs were used to examine the hard and soft tissue changes following overjet reduction in 62 children with moderately severe Class II division 1 malocclusions. Thirty-two patients were treated by non-extraction methods using Fränkel appliances, and the remainder by a standard Edgewise technique in...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/12.2.154

    authors: Battagel JM

    更新日期:1990-05-01 00:00:00

  • Differences in dental arch morphology among adult females with untreated Class I and Class II malocclusion.

    abstract::The purpose of the study was to evaluate differences in dental arch morphology among an orthodontic sample of 386 untreated adult females between 17 and 68 years of age, categorized by age group (17-25 years, 26-35 years, or 35+ years) and malocclusion (Class I, Class II division 1, or Class II division 2). The result...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/16.1.47

    authors: Buschang PH,Stroud J,Alexander RG

    更新日期:1994-02-01 00:00:00

  • Cervical vertebral body fusions in patients with skeletal deep bite.

    abstract::Cervical column morphology was examined in 41 adult patients with a skeletal deep bite, 23 females aged 22-42 years (mean 27.9) and 18 males aged 21-44 years (mean 30.8) and compared with the cervical column morphology in an adult control group consisting of 21 subjects, 15 females, aged 23-40 years (mean 29.2 years) ...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjm043

    authors: Sonnesen L,Kjaer I

    更新日期:2007-10-01 00:00:00

  • The P561T polymorphism of the growth hormone receptor gene has an inhibitory effect on mandibular growth in young children.

    abstract::P561T heterozygous missense mutation in the growth hormone receptor (GHR) is a candidate genetic polymorphism (single-nucleotide polymorphism) for human mandibular growth. The purpose of this study was to assess whether this mutation affects mandibular growth during early childhood. The difference in mandibular growth...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjp017

    authors: Sasaki Y,Satoh K,Hayasaki H,Fukumoto S,Fujiwara T,Nonaka K

    更新日期:2009-10-01 00:00:00

  • Cervical column morphology in adult patients with obstructive sleep apnoea.

    abstract::Cervical column morphology was examined in adult patients with obstructive sleep apnoea (OSA) and compared with the cervical morphology of an adult control group with neutral occlusion, normal craniofacial morphology, and no history of sleep apnoea. The sleep apnoea group consisted of 91 patients, 16 females aged 29-5...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjn028

    authors: Sonnesen L,Petri N,Kjaer I,Svanholt P

    更新日期:2008-10-01 00:00:00

  • Who knows more about the impact of malocclusion on children's quality of life, mothers or fathers?

    abstract::Shared decision making between children and parents is required in orthodontics. This study compared agreement among mothers, fathers, and children regarding the oral health-related quality of life (OHRQoL) of children. A sample of 71 child patients (41 girls and 30 boys) aged 12.6 years with an orthodontic treatment ...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjl058

    authors: Zhang M,McGrath C,Hägg U

    更新日期:2007-04-01 00:00:00

  • The aetiological factors in Class III malocclusion.

    abstract::This retrospective, cephalometric study was undertaken in an attempt to identify the aetiological features which may be associated with a Class III malocclusion in the growing child. Four-hundred-and-ninety-five lateral cephalometric radiographs (210 control and 285 Class III films) formed the basis of the study. All ...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/15.5.347

    authors: Battagel JM

    更新日期:1993-10-01 00:00:00

  • Short-term hard and soft tissue changes after mandibular advancement surgery in Class II patients: a retrospective cephalometric study.

    abstract:Aim:The aim of this study was to describe hard and soft tissue changes after mandibular advancement surgery and to investigate the possible differences between Class II facial patterns. Materials and methods:Lateral cephalograms of 109 patients who underwent combined orthodontic treatment and bilateral sagittal split ...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjx003

    authors: Storms AS,Miclotte A,Grosjean L,Cadenas de Llano-Pérula M,Alqerban A,Fieuws S,Sun Y,Politis C,Verdonck A,Willems G

    更新日期:2017-10-01 00:00:00

  • A skull-holding device for experimental cephalometric research.

    abstract::This paper describes and illustrates an innovative versatile skull-holding device for experimental research in cephalometrics. Repositioning of the skulls was evaluated and found to be highly reproducible. ...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/18.2.193

    authors: Chan TC,Tng TT,Hägg U,Cooke MS

    更新日期:1996-04-01 00:00:00

  • Three-dimensional assessment of facial asymmetry among pre-pubertal class III subjects: a controlled study.

    abstract:BACKGROUND/OBJECTIVE:Facial asymmetry is very common in adult class III patients; however, the degree of facial asymmetry in growing class III subjects has been poorly investigated. Therefore, the aim was to assess the degree of facial asymmetry of growing class III subjects and to compare it with a sample of growing s...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjt069

    authors: Ovsenik M,Perinetti G,Zhurov A,Richmond S,Primozic J

    更新日期:2014-08-01 00:00:00

  • Prevalence and distribution of permanent canine agenesis in dental paediatric and orthodontic patients in Hungary.

    abstract::Non-syndromic permanent canine agenesis, or combined with agenesis, or developmental absence of other tooth types, has occasionally been described in the literature, but isolated forms are rarely observed. The purpose of the present retrospective radiographic study was to provide data on the prevalence and distributio...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cjp018

    authors: Rózsa N,Nagy K,Vajó Z,Gábris K,Soós A,Alberth M,Tarján I

    更新日期:2009-08-01 00:00:00

  • Meta-analysis of skeletal mandibular changes during Frankel appliance treatment.

    abstract::The purpose of this study was to perform a meta-analysis of articles to verify the mandibular changes produced by the Fränkel-2 (FR-2) appliance during the treatment of growing patients with Class II malocclusions when compared with untreated growing Class II subjects. The literature published from January 1966 to Jan...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章,meta分析,评审

    doi:10.1093/ejo/cjq033

    authors: Perillo L,Cannavale R,Ferro F,Franchi L,Masucci C,Chiodini P,Baccetti T

    更新日期:2011-02-01 00:00:00

  • Space conditions and dental and occlusal features in patients with palatally impacted maxillary canines: an aetiological study.

    abstract::The aetiology of palatal canine impaction is unclear. The aim of this research was to investigate the occlusal features that could contribute to the aetiology of palatal maxillary canine impaction. The material consisted of the pre-treatment dental casts of 34 patients (27 female and seven male) with unilateral palata...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/cji022

    authors: Al-Nimri K,Gharaibeh T

    更新日期:2005-10-01 00:00:00

  • Orthodontic care from the patients' perspective: perceptions of 27-year-olds.

    abstract::The aim was to analyse 27-year-olds' perceptions of their own dental arrangement and any orthodontic care they may have received as a child or adolescent. All of the individuals in a sample of young adults in Kronoberg County, Sweden, who had received orthodontic care during childhood or adolescence (n = 121) were sel...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/20.3.319

    authors: Bergström K,Halling A,Wilde B

    更新日期:1998-06-01 00:00:00

  • An in vivo investigation into the use of resin-modified glass poly(alkenote) cements as orthodontic bonding agents.

    abstract::The aim of this study was to investigate the in vivo bonding of orthodontic brackets using two resin-modified glass poly(alkenoate) cements and to compare them with a conventional light-cured diacrylate bonding agent. Twenty consecutive patients attending for bond up appointments took part in this randomized cross-mou...

    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/23.4.403

    authors: Choo SC,Ireland AJ,Sherriff M

    更新日期:2001-08-01 00:00:00

  • Morphology of Singapore chinese.

    abstract::The aims of this study were to provide a description of the craniofacial morphology of Singaporean Chinese children and to compare gender differences. Lateral cephalometric radiographs were obtained of 81 Singaporean Chinese children (31 boys and 50 girls; mean age 12.7 and 12.5 years, respectively, standard deviation...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/26.6.605

    authors: Yeong P,Huggare J

    更新日期:2004-12-01 00:00:00

  • A postero-anterior cephalometric evaluation of adult open bite subjects as related to normals.

    abstract::Reduced nasal airflow can be the result of enlarged adenoids, hypertrophic turbinates, severely deviated nasal septum, or even narrow nasal cavities. The question of whether the width of the nasal cavity may influence certain facial dimensions examined on the postero-anterior cephalometric X-ray was evaluated through ...

    journal_title:European journal of orthodontics

    pub_type: 杂志文章

    doi:10.1093/ejo/13.5.410

    authors: Toutountzakis NE,Haralabakis NB

    更新日期:1991-10-01 00:00:00

  • Regional facial asymmetries in unilateral orofacial clefts.

    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

    authors: Kuijpers MA,Desmedt DJ,Nada RM,Bergé SJ,Fudalej PS,Maal TJ

    更新日期:2015-12-01 00:00:00