Abstract:
:It has been suggested that subjects with increased vertical craniofacial dimensions have relatively oblique orientated jaw muscles with a reduced possibility to restrain the vertical component of craniofacial growth. To test this hypothesis, relationships were investigated between the spatial orientation of the jaw muscles and the craniofacial morphology. Computer reconstructions of the external shape of the jaw muscles of 30 adult males with a normal skull were made with the use of serial magnetic resonance imaging (MRI) scans. The orientation of the jaw muscles was defined by a regression line through the centroids of the serial cross-sections. Sagittal and frontal projections of the moment arms of the muscles were measured with respect to the centre of the ipsilateral condyle. Craniofacial morphology was analysed three-dimensionally using lateral head films and coronal MRI scans. The cephalometric data were analysed statistically using regression and factor analyses. Six cephalometric factors with Eigen values higher than 1 were correlated with jaw muscle orientation and moment arm data, using a multiple regression analysis. The anterior face height factor was significantly correlated with the orientation of the jaw opening muscles in the sagittal plane but was not significantly correlated with the orientation of the mandibular elevators. The sagittal moment arms of the mandibular elevators showed significant correlations with the factors describing the gonial angle and the posterior face height. It was concluded that the variation of spatial orientation of the human jaw closing muscles is predominantly associated with the variation of mandibular morphology (expressed by the gonial angle) and the posterior face height. The orientation of the jaw opening muscles shows significant relationships with anterior vertical craniofacial dimensions. The hypothesis that persons with an increased anterior face height have relatively oblique orientated jaw elevators was rejected.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
van Spronsen PH,Koolstra JH,van Ginkel FC,Weijs WA,Valk J,Prahl-Andersen Bdoi
10.1093/ejo/19.3.313subject
Has Abstractpub_date
1997-06-01 00:00:00pages
313-28issue
3eissn
0141-5387issn
1460-2210journal_volume
19pub_type
杂志文章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
更新日期:2001-08-01 00:00:00
abstract::The aims of the study were to identify craniofacial characteristics in patients with the rough hypoplastic amelogenesis imperfecta (AI) phenotype and to evaluate whether craniofacial variables are related to a mutation in either of the two genes associated with AI, enamelin (ENAM) and amelogenin (AMGX). Eight children...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjq089
更新日期:2011-06-01 00:00:00
abstract:Background:Scientific evidence is insufficient to answer the question of whether premature birth causes altered tooth-crown dimensions. Objective:To evaluate permanent tooth-crown dimensions in prematurely born children and to compare the findings with full-term born controls. Subjects and Methods:Preterm children of...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjx021
更新日期:2017-11-30 00:00:00
abstract::The aim of this study was to assess the prevalence of malocclusion and its association with socio-demographic characteristics, caries experience, and level of oral hygiene in 12- to 14-year-old schoolchildren residing in two socio-economically different districts of Tanzania. A total of 1601 children (mean age 13 year...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjn125
更新日期:2009-10-01 00:00:00
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
更新日期:1999-12-01 00:00:00
abstract::In order to apply high, short-term forces during rapid maxillary expansion (RME) to the sutures of the maxilla with minimum loss of force and without causing unwanted side-effects (dentoalveolar tipping, etc.), the appliance should be as rigid as possible. The retention arms of the RME screws, representing a particula...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjq065
更新日期:2011-06-01 00:00:00
abstract::Many practitioners will recognize that subjects with a large mandibular plane inclination are characterized by an extended head posture and a forward inclined cervical column, i.e. an extended cranio-cervical posture. It is also typical that subjects with a short-face morphology often carry their heads somewhat lowere...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/24.5.447
更新日期:2002-10-01 00:00:00
abstract::This prospective study investigated the skeletal, dental, and soft-tissue effects of a mini maxillary protractor appliance in class III subjects with maxillary retrusion and mandibular protrusion and compared these changes with those of untreated, well matched control sample with normal occlusions. Twenty patients wit...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjt006
更新日期:2014-02-01 00:00:00
abstract:Aim:To assess the association between tooth wear (TW) and gingival recession (GR). Materials and Methods:Two hundred and ten orthodontically treated participants (100 males) were evaluated. GR and TW were rated independently by four raters on plaster models at four time points: before treatment (T1), mean age 13.8 yea...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjx083
更新日期:2018-07-27 00:00:00
abstract::A retrospective cephalometric study was made of the hard tissue changes in a group of 90 Class III, Skeletal III children, diagnosed as suitable for treatment by orthodontic means alone. Thirty-two were treated by a combination of upper incisor proclination and headgear to an intact mandibular dentition (Group 1), whi...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/13.3.212
更新日期:1991-06-01 00:00:00
abstract::The purpose of the present study was to compare the cranio-facial morphology in children with and without enlarged tonsils. The material consisted of 73 children with enlarged tonsils, and a control group of children with normal tonsils, matched for age, sex, and number. The mean age for the groups was 10.1 and 10.0 y...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/12.3.233
更新日期:1990-08-01 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::Various investigations have mentioned the use of a bonded maxillary expansion appliance. It was postulated that a full coverage of the occlusal surfaces by acrylic would remove interferences during the lateral displacement of the two maxillary bones and would lessen the resistance to maxillary expansion. The first obj...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/oxfordjournals.ejo.a035967
更新日期:1989-02-01 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::The aims of this study were to evaluate the frequency of errors in panoramic radiographs in young orthodontic patients, to register pathologic and abnormal conditions, and to compare these findings with the patient's record. A total of 1287 panoramic radiographs of children and adolescents (530 boys and 757 girls; mea...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjr035
更新日期:2012-08-01 00:00:00
abstract:OBJECTIVES:Mechanobiology phenomena constitute a major element of the cellular and tissue response during orthodontic treatment and the implantation of a biomaterial. Better understanding these phenomena will improve the effectiveness of our treatments. The objective of this work is to validate a model of three-dimensi...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjaa017
更新日期:2020-09-11 00:00:00
abstract:OBJECTIVES:Loosening and loss rates of monocortical mini-implants are relatively high, therefore the following null hypothesis was tested: 'The local bone stress in mono and bicortically-anchored mini-implants is identical'. MATERIAL AND METHODS:Anisotropic Finite Element Method (FEM) models of the mandibular bone, in...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjt023
更新日期:2014-10-01 00:00:00
abstract::The purpose of this study was to compare the effect of overjet and overbite correction in non-extraction and extraction therapy in a sample of Class II malocclusions treated with the Edgewise appliance. The subjects were 20 children treated without extraction and 20 children treated with extraction of the four first p...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/oxfordjournals.ejo.a035984
更新日期:1989-05-01 00:00:00
abstract::Two young patients, one female and one male, with asymmetric occlusal deviation and extreme Angle Class II division 1 malocclusions were treated with the Herbst appliance after cessation of endochondral growth (union of the radius epiphysis). During treatment, computer tomographic (CT) scanning and orthopantomograms o...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/22.6.649
更新日期:2000-12-01 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::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::Class II elastics are usually employed in the treatment of excessive overbite and overjet with the Begg technique. The effect of Class II elastics on bite opening and the extent of such an effect is uncertain. This article, based on measurements of 30 cases, illustrates that the effect of the vertical component of for...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/14.4.280
更新日期:1992-08-01 00:00:00
abstract::A logical basis for the sequence of wires chosen during orthodontic treatment with fixed appliances is presented. This utilizes a new more realistic model for the radial deflection of a segment of the archwire in which the wire is restrained by the ligatures on the misaligned tooth, contacts the inner edges of the bra...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/14.3.240
更新日期:1992-06-01 00:00:00
abstract::The purpose of the study is to determine whether the various aspects of the craniofacial complex exhibit female adolescent growth spurts. Multilevel polynomial models were used to estimate the growth curves of a mixed-longitudinal sample of 111 untreated females 10-15 years of age. To evaluate the horizontal and verti...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjs094
更新日期:2013-12-01 00:00:00
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
更新日期:1998-06-01 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...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjm082
更新日期:2008-02-01 00:00:00
abstract:Objective:To assess the dental, skeletal, and profile changes after functional appliances and subsequent fixed appliances treatment in order to quantify their effect and evaluate the influence of initial incisal inclination and growth pattern. Materials and methods:A retrospective cephalometric analysis was performed ...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/cjw064
更新日期:2017-06-01 00:00:00
abstract::The performance of 5941 stainless steel orthodontic brackets bonded with a no-mix adhesive (Right-on) in 563 patients was reviewed over a 5-year period. The effects of age and sex of the patient, treatment mechanics, operator experience, and arch location on the failure rate and mean survival time (MST) of bonded orth...
journal_title:European journal of orthodontics
pub_type: 杂志文章
doi:10.1093/ejo/16.3.203
更新日期:1994-06-01 00:00:00
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::Orthodontics as health care is sometimes at odds with modern marketing with its strong focus on aesthetics. In this commentary, I highlight how important it is that research of orthodontic treatment as a value for the entire community is performed and published. ...
journal_title:European journal of orthodontics
pub_type: 评论,杂志文章
doi:10.1093/ejo/cjs081
更新日期:2013-04-01 00:00:00