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 advancement on intraoral pressure and electromyographic (EMG) activity of the lower lip. MATERIALS AND METHODS:Intraoral pressure and EMG activity was measured in 10 participants (2 males, 8 females; 22 years ± 7 months) as the lower lip was incrementally advanced using three custom-made vacuum-formed stents of differing labial thicknesses (0.5, 2.5, and 4.5 mm). A task paradigm including at rest recordings and maximal voluntary contraction was completed for each tray. RESULTS:Resting lip pressure generated increased as the lower lip was advanced (P < 0.001). The EMG activity of the lower lip increased significantly (P < 0.001) only once the lip was advanced from 2.5 to 4.5 mm. For the pressure recordings, the response to incremental lip advancement showed considerable individual variation. CONCLUSIONS:These findings suggest that the initial pressure increase on the lower incisors was mostly likely due to the inherent viscoelastic properties of the lower lip, while the pressure increase between the 2.5 and 4.5 mm advancement was due to increased muscle activity. Each individual also responded to lower lip advancement in a different yet subject-specific manner.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Jack HC,Kieser J,Antoun JS,Farella Mdoi
10.1093/ejo/cjt094subject
Has Abstractpub_date
2014-12-01 00:00:00pages
672-7issue
6eissn
0141-5387issn
1460-2210pii
cjt094journal_volume
36pub_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：:Many animal experiments dealing with function-form interaction and mandibular condylar growth have utilized hyperpropulsion of the animal's mandible. Numerous hyperpropulsive appliances have been described in the literature. However, there are significant discrepancies between reported results which are most likely du...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/19.1.1
更新日期：1997-02-01 00:00:00
abstract：:The publication of the three-paper series on the effects of two slot sizes on treatment parameters in this issue, targets a topic, which has attracted a lot of discussion based primarily on anecdotal evidence. The conclusive evidence contribute to the lack of variation of treatment variables with slot size selection, ...
journal_title：European journal of orthodontics
pub_type： 评论,杂志文章
doi：10.1093/ejo/cjy051
更新日期：2019-05-24 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 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
更新日期：2009-02-01 00:00:00
abstract：:The effects of an extra chromosome on tooth size were investigated and compared to male and female controls, respectively. Mesiodistal dimensions in men with Klinefelter's syndrome were generally found to be decreased when compared to the male controls. A more pronounced inhibitory effect of an extra X chromosome was ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/15.3.195
更新日期：1993-06-01 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
abstract：:The objective of this study was to investigate the effects of precuring of primer coated on bracket bases on the strength of bonds between metal brackets and gold alloy. Square type III gold alloy plates were sandblasted with 30 μm silicon dioxide. After silica coating, excessive particles were removed gently with air...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjq163
更新日期：2012-02-01 00:00:00
abstract：:The aims of the study were to analyse the records of 26 subjects (18 females, eight males) with maxillary canine-first premolar transposition (Mx.C.P1) together with 160 subjects with a palatally displaced canine (PDC) to determine the pattern of tooth agenesis in these cases and to compare them with similar samples r...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cji040
更新日期：2005-10-01 00:00:00
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
更新日期：2014-08-01 00:00:00
abstract：:Metabolism by peptidases plays an important role in modulating the levels of biologically-active neuropeptides, while that of substance P (SP), a component of gingival crevicular fluid (GCF), may potentiate the inflammatory process in orthodontic tooth movement. The aim of this study was two-fold: (1) to investigate G...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cji100
更新日期：2006-06-01 00:00:00
abstract：:Patients with mandibular prognathism have, for a number of years, been treated by orthognathic surgery and post-surgical changes in the facial profile have been widely reported. However, little is known about the influence of gender and age on the soft tissues. The aim of this study was to investigate changes in the s...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjn025
更新日期：2008-08-01 00:00:00
abstract：:This study provides sex specific reference data for the incremental growth of the mandibular condyle. The results pertain to a mixed-longitudinal sample of 113 males and 108 females followed annually between 6 and 16 years of age (total of 1647 observations). Growth of condylion was evaluated using naturally stable ma...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/21.2.167
更新日期：1999-04-01 00:00:00
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
更新日期：2007-10-01 00:00:00
abstract：:The aim of the present investigation was to examine position, occlusion, and interproximal contacts of 139 transplanted third molars in 136 patients (94 females, 42 males) with a mean age of 17.6 years at the time of transplantation. Ninety-two teeth were placed directly into favourable positions and left to erupt spo...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjn084
更新日期：2009-04-01 00:00:00
abstract：:The purpose of this work was to examine whether the clinical eruption of the permanent first molars and incisors is affected by pre-term birth. The data applied to 328 prematurely born white and black children and 1804 control children who participated in the Collaborative Perinatal Project (USA) in the early 1960s an...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/25.3.293
更新日期：2003-06-01 00:00:00
abstract：Background and objectives:Apart from the primary effect of bite-blocks on tooth position, they may also influence the mandibular condylar growth. Our aim was to investigate their influence on the condylar morphology, with variable masticatory forces. Material and methods:Fifty-two 4-week old male rats were divided int...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjx072
更新日期：2018-05-25 00:00:00
abstract：:Mandibular advancement splints (MASs) are used to advance the mandible forward in patients with sleep-disordered breathing. The conventional rigid MAS restricts the movement of the mandible, and this immobility sometimes produces discomfort, including temporomandibular disorders. A simple method for fabricating a mobi...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjp040
更新日期：2009-12-01 00:00:00
abstract：:The aim of this study was to evaluate the effects of the headgear activator (HGA) and Herbst appliance during active treatment and retention and at follow-up in children with a skeletal Class II malocclusion. The two groups comprised 16 consecutive male patients (mean age 11.6 +/- 1.42 years) treated with a HGA and 16...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjl052
更新日期：2006-12-01 00:00:00
abstract：AIM:Compare surface roughness of 'aesthetic' nickel-titanium (NiTi) archwires with their dynamic frictional properties. METHODS:Archwires investigated were: four fully coated tooth coloured [Forestadent: Biocosmetic (FB) and Titanol Cosmetic (FT); TOC Tooth Tone (TT); and Hawley Russell Coated Superelastic NiTi (HRC)]...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cju004
更新日期：2015-02-01 00:00:00
abstract：OBJECTIVES:This study compared the stability of tapered miniscrews with cylindrical miniscrews. MATERIALS/METHODS:One hundred and five tapered and 122 cylindrical self-drilling miniscrews were placed into the maxillary and mandibular buccal alveolar areas of 132 patients (43 males and 89 females). The insertion torque...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjt092
更新日期：2014-10-01 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：:The aim of this investigation was to examine the fluoride uptake by enamel after application of glass ionomer cement for orthodontic band cementation compared with zinc phosphate cement. The study was conducted on 21 children whose mean age was 14 years. All the children were reared in the Middle Anatolian cities wher...
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/18.1.81
更新日期：1996-02-01 00:00:00
abstract：Objective and design:Our aim was to evaluate the effect of mandible advancement splint (MAS) in mild, moderate, and severe obstructive sleep apnea (OSA). We also determined, if and in which OSA-groups the adequate forward movement in MAS could be quantified without sleep registration for different OSA levels. A retrosp...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjw068
更新日期：2017-10-01 00:00:00
abstract：:The purpose of this study was to determine whether quantitative light-induced fluorescence (QLF) could detect very early demineralization and remineralization longitudinally adjacent to orthodontic components in an in vitro model. Extracted human premolars (n = 13) were sectioned sagittally to produce two equal halves...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/25.3.217
更新日期：2003-06-01 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 aim of the present study was to compare patient, parent and clinician perceived need for orthodontic treatment in relation to normative orthodontic treatment need as measured by the Index of Orthodontic Treatment Need (IOTN). A prospective cross-sectional study was designed to address this aim. The sample comprise...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/26.3.265
更新日期：2004-06-01 00:00:00
abstract：OBJECTIVES:The objective of the study was to evaluate the impact of temporomandibular joint (TMJ) arthritis on the functional disability and quality of life in patients affected by juvenile idiopathic arthritis (JIA). MATERIALS AND METHODS:Sixty-two consecutive patients with JIA with or without TMJ arthritis and 35 he...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjy034
更新日期：2019-03-29 00:00:00
abstract：:Orthodontic bonding with glass ionomer cement is comparatively new. The purpose of this article is to review the current literature covering both in vitro and in vivo studies of various glass ionomer cements that have been used for orthodontic bonding. The review indicates that there is little support in the literatur...
journal_title：European journal of orthodontics
pub_type： 杂志文章,评审
doi：10.1093/ejo/18.4.385
更新日期：1996-08-01 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
