Abstract：
:It has previously been shown by light (LM) and scanning electron microscopy (SEM), that after force is terminated, repair of the orthodontic root resorption lacunae occur by deposition of new cementum. The ultrastructural details of the process are not well established. Since it has been hypothesized that a new barrier to protect the root surface is formed during the reparative phase, new information on this aspect of orthodontic root resorption may be valuable. The aim of the present investigation was, by using transmission electron microscopy (TEM), to study in more detail the repair of orthodontic root resorption lacunae and the re-establishment of the adjacent periodontal membrane (PM). Three experimental tooth movement groups of rats (age 40-45 days) were used. The maxillary first molar was moved mesially by a closed coil spring for 10, 14, and 21 days. The results indicate that transition of active root resorption into a process of repair which occurs even in the presence of a light force, is associated with invasion of fibroblast-like cells from the circumference into the active root resorption site. After 10 days, formation of new tooth supporting structures was seen in the periphery of the resorption lacunae, while active resorption by multinucleated odontoclast-like cells (OD) took place in the central parts. In the later phases, after termination of force, the repair process is similar to the early cementogenesis occurring during tooth development. New mineralized cementum was observed on the resorbed root surface by 21 days. After deposition of the new cementum, the structures of a new periodontal ligament (PDL) were comparable with the control specimens.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Brudvik P,Rygh Pdoi
10.1093/ejo/17.3.189subject
Has Abstractpub_date
1995-06-01 00:00:00pages
189-98issue
3eissn
0141-5387issn
1460-2210journal_volume
17pub_type
杂志文章abstract：:To investigate whether orthodontic cases can fulfil gnathologic requirement, models of 10 adolescent patients (of the Department of Orthodontics at the University Dental Clinic, Graz) were mounted in an articulator at band removal and 2, 4 and 12 weeks and one year later. During this year the patients wore a gnatholog...
journal_title：European journal of orthodontics
pub_type： 杂志文章,评审
doi：10.1093/oxfordjournals.ejo.a035989
更新日期：1989-08-01 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：Objective:To investigate effects of mandible advanced device (MAD) therapy for obstructive sleep apnoea-hypopnea syndrome (OSAHS) on the neuron apoptosis and acetylcholine esterase activity in frontal cortex. Materials and methods:Thirty male New Zealand white rabbits were randomly divided into three groups (n = 10 in...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjx060
更新日期：2018-05-25 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：:The aim of this randomized controlled trial was to assess the effectiveness of a mandibular advancement appliance (MAA) in managing severe snoring. Twenty-eight adults with severe snoring and normal overnight oximetry were recruited from sleep disorder clinics. A maxillary placebo appliance and a MAA were worn by each...
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/23.2.127
更新日期：2001-04-01 00:00:00
abstract：:The physiology of masseter muscles is known to change in response to functional demands, but the effect on the satellite cell (SC) population is not known. In this study, the hypothesis is tested that a decreased functional demand of the masseter muscle causes a reduction of SCs. To this end, twelve 5-week-old male Sp...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjs044
更新日期：2014-06-01 00:00:00
abstract：:This retrospective study examined the occurrence of congenitally missing permanent teeth and the need for dental treatment in the Regensburg University Medical Centre of Eastern Bavaria. Using a dental administration software tool, a total of 1442 patients who presented for orthodontic treatment between 1994 and 2006 ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjq021
更新日期：2011-02-01 00:00:00
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
更新日期：2007-04-01 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：BACKGROUND/OBJECTIVES:To assess intra- and inter-observer reproducibility of the evaluation of the Frӓnkel Manoeuvre (FM) on three-dimensional (3D) scans and to compare it to the assessment on two-dimensional (2D) pictures. MATERIALS/METHODS:This study included 44 individuals with a skeletal Class II malocclusion [9-1...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjz081
更新日期：2020-04-01 00:00:00
abstract：:The aim of this study was to develop a valid and reproducible index of orthodontic treatment priority. After reviewing the available literature, it was felt that this could be best achieved by using two separate components to record firstly the dental health and functional indications for treatment, and secondly the a...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/oxfordjournals.ejo.a035999
更新日期：1989-08-01 00:00:00
abstract：OBJECTIVE:To compare treatment duration between 0.018-inch and 0.022-inch slot systems and determine factors influencing treatment duration. SUBJECTS AND METHODS:Eligible participants aged 12 years or over were allocated to the 0.018-inch or 0.022-inch slot MBT appliance (3M-Unitek, Monrovia, California, USA) using bl...
journal_title：European journal of orthodontics
pub_type： 杂志文章,随机对照试验
doi：10.1093/ejo/cjy037
更新日期：2019-03-29 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...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/13.5.343
更新日期：1991-10-01 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：:A clinical trial was undertaken to assess the value of incorporating fluoride released from a commercially available bonding adhesive (Rely-a-Bond) to determine the extent of any protection provided against enamel decalcification. Fifty patients undergoing fixed appliance therapy were included in the trial. Contralate...
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/19.4.391
更新日期：1997-08-01 00:00:00
abstract：:The aim of this study was to identify the transverse growth pattern of the craniofacial skeleton and dentition from 7 to 15 years of age. The database for this longitudinal study comprised the postero-anterior (PA) cephalograms and dental casts at 7, 9, 11, 13 and 15 years of age of 18 untreated Class I subjects with ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/26.1.31
更新日期：2004-02-01 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：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
更新日期：2017-10-01 00:00:00
abstract：BACKGROUND AND OBJECTIVES:Clear aligner is an advanced orthodontic method with benefits of comfort, aesthetics, and convenience. This study aimed to compare pain perception, anxiety, and impacts on oral health-related quality of life (OHRQoL) between adult patients receiving clear aligners and fixed appliances during t...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjaa037
更新日期：2020-07-02 00:00:00
abstract：OBJECTIVE:To investigate the factors associated with the change in alveolar bone level of mandibular second and third molars after second molar protraction into the space of the missing first molar (L6) or second premolar (LE). METHODS:Fifty-one patients in whom space of the missing L6 or LE was treated with second mo...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjz001
更新日期：2019-09-21 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：:This study evaluated the effect of sandblasting foil mesh molar tube bases on the shear bond strength obtained when bonding to first molar teeth. Fifty-two recently extracted first molar teeth were etched with 35 per cent phosphoric acid gel for 30 seconds. Twenty-six sandblasted 'A' Company molar tube attachments and...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/21.3.311
更新日期：1999-06-01 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 compare standard plaster models with their digital counterparts for the applicability of the Index of Complexity, Outcome, and Need (ICON). Generated study models of 30 randomly selected patients: 30 pre- (T(0)) and 30 post- (T(1)) treatment. Two examiners, calibrated in the ICON, scored t...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjn077
更新日期：2009-06-01 00:00:00
abstract：:Tooth displacement was analysed on human autopsy material for various types of orthodontic force systems using an electronic strain gauge technique. Tooth movements were registered in two dimensions with low force clip gauges on three sections of the mandible, containing the first premolar and the first molar. The sen...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/13.1.65
更新日期：1991-02-01 00:00:00
abstract：:Malocclusion assessment methods are based on measurements of study casts, which requires that impressions be taken. In addition to being costly and time consuming, this process can be unpleasant for children. Therefore, the aim of this study was to evaluate intra- and inter-examiner reliability of intraoral score meas...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjl064
更新日期：2007-02-01 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：:Fifty-two patients with malocclusions underwent orthodontic treatment in combination with orthognathic surgery involving a Le Fort I and/or sagittal split osteotomy. Approximately 5 years after surgery, the patients were examined for signs and symptoms of temporomandibular disorders (TMD). The frequencies were found t...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/22.5.537
更新日期：2000-10-01 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：: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
