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 brackets either side, and is restrained by the outer ligatures on these brackets. The model, analysed using simple beam theory, allows the determination of the upper and lower bounds for the range of deflection over which orthodontic forces within the optimum range are produced without distortion for any given wire providing its flexural rigidity (EI) and yield stress in bending (sigma o) are known. The same model can be applied to vertical deflections. Some wire sequences recommended on clinical experience appear to conform to this more pragmatic approach, although to cater for even moderate misalignment the forces predicted by the model are higher than normally considered desirable.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Waters NEdoi
10.1093/ejo/14.3.240keywords:
subject
Has Abstractpub_date
1992-06-01 00:00:00pages
240-5issue
3eissn
0141-5387issn
1460-2210journal_volume
14pub_type
杂志文章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：:The search for an ideal enamel surface finishing method following bracket debonding has met with equivocal response. In this study, four other methods were assessed to determine their effectiveness against the slow speed tungsten carbide bur which is regarded as the established method of removing residual composite. O...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/17.2.121
更新日期：1995-04-01 00:00:00
abstract：OBJECTIVE:This study investigated the expression of extracellular matrix metalloproteinase inducer (EMMPRIN) in the compression area during orthodontic relapse in rat molars. MATERIALS AND METHODS:Thirty Wistar rats (6 weeks old) underwent orthodontic tooth movement (OTM) of the left first maxillary molar for 21 days,...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjz046
更新日期：2020-06-23 00:00:00
abstract：:The effects of a transpalatal arch for the symmetrical derotation of rotated first molars were evaluated in 50 children, 8-13 years of age. The positions of the molars were compared with those in 34 individuals, aged 12-18 years, with normal occlusion. Prefabricated (GAC) stainless steel arches were used for 60-198 da...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/18.3.257
更新日期：1996-06-01 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：: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：:The aim of this presentation is to describe an innovative adhesive procedure for connecting palatal implants with transpalatal arches (TPAs). The steps required for completing the procedure, the costs involved and the requisite time were reviewed and compared with those of two alternative procedures reported in the li...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cji002
更新日期：2005-06-01 00:00:00
abstract：:Clinical outcomes in children born with a cleft lip and palate (CLP) have been an area of interest for orthodontists for a number of years. Whilst tools for measurement of these outcomes are available, there is no widely accepted measure of initial cleft severity and no known quantitative indices. Therefore, the poten...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/22.1.93
更新日期：2000-02-01 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：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
更新日期：2020-02-01 00:00:00
abstract：OBJECTIVE:To analyse cost-effectiveness of anchorage reinforcement with buccal miniscrews and with molar blocks. We hypothesized that anchorage with miniscrews is more cost-effective than anchorage with molar blocks. TRIAL DESIGN:A single-centre, two-arm parallel-group randomized controlled trial. METHODS:Adolescents...
journal_title：European journal of orthodontics
pub_type： 杂志文章,随机对照试验
doi：10.1093/ejo/cjy041
更新日期：2019-03-29 00:00:00
abstract：:Cleidocranial dysplasia (CCD) is a rare, well-defined skeletal disorder with autosomal dominant inheritance and complete penetrance. Although it involves the whole skeletal system, the main clinical manifestations of CCD are malformations of the skull and clavicles, which lead to a typical appearance of the face and s...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjq107
更新日期：2011-10-01 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：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：:Differential scanning calorimetry (DSC) was used to determine the transition temperature ranges (TTR) of four types of super-elastic orthodontic nickel-titanium coil springs (Sentalloy). A knowledge of the TTR provides information on the temperature at which a NiTi wire or spring can assume superelastic properties and...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/21.5.497
更新日期：1999-10-01 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：:Recent studies revealed that the initial root resorption occurred in the peripheries of the necrotic periodontal ligament (PDL) and was performed by mono-nucleated non-clast macrophage- and fibroblast-like cells (Brudvik and Rygh, 1993a, b). The aim of the present transmission electron microscopic (TEM) investigation ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/16.4.265
更新日期：1994-08-01 00:00:00
abstract：:The viscoelastic behaviour of prototype composite orthodontic archwires was evaluated using a bend stress relaxation test. Archwires having 10 different volume fractions of reinforcement were subjected to constant bending radii in a water bath at 37 degrees C for time periods of up to 90 days. The wires were subsequen...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/22.1.1
更新日期：2000-02-01 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：: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：:The prevalence of signs and symptoms attributed to craniomandibular disorders (CMD) was established in an orthodontically treated sample. The effect of orthodontic therapy upon this prevalence was studied by monitoring three groups of patients whose treatment procedures were different. The first group was treated with...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/14.1.16
更新日期：1992-02-01 00:00:00
abstract：:The long-term goal of this research is to define the dimensions of nasal airway adequacy in children. Nasal airway size and variables associated with growth were assessed in 138 healthy children aged 7-15 years. The pressure-flow technique (Warren, 1984) was used to calculate the smallest cross-sectional area of the n...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/13.4.311
更新日期：1991-08-01 00:00:00
abstract：:The mechanics of the quadhelix maxillary expansion appliance have been derived using the complementary (strain) energy approach, and the results checked experimentally on enlarged models. Good agreement between theory and experiment was obtained, for both the lateral stiffness and the magnitude of the molar couple ind...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/oxfordjournals.ejo.a035980
更新日期：1989-05-01 00:00:00
abstract：:The purpose of the present investigation was to consider possible aetiological aspects of mandibular tooth agenesis by comparing the pattern of mandibular molar and premolar agenesis with radiological evidence of the mandibular canal. Orthopantomograms from 33 children affected by agenesis of at least four premolar an...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/16.5.371
更新日期：1994-10-01 00:00:00
abstract：:The purpose of this study was to investigate the effects of rapid maxillary expansion (RME) and semi-rapid maxillary expansion (SRME) in the mixed dentition period. The SRME group consisted of 18 patients (11 girls and 7 boys) with a mean age of 8.63 +/- 1.09 years and the RME group 17 patients (11 girls and 6 boys) w...
journal_title：European journal of orthodontics
pub_type： 杂志文章,随机对照试验
doi：10.1093/ejo/cjp057
更新日期：2010-02-01 00:00:00
abstract：:This prospective study analysed the lateral cephalometric radiographs of 59 dentate, white, Caucasian males. Thirty-five patients with proven obstructive sleep apnoea (OSA) formed the experimental group, while 24 subjects with no history of respiratory disease acted as controls. Radiographs were traced and digitized, ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/18.6.557
更新日期：1996-12-01 00:00:00
abstract：Introduction:Orthodontic miniscrews are an increasingly popular choice to achieve absolute anchorage. The temporary use of miniscrews and their recent introduction have limited the debate over the biological aspect of the materials to that of the surface that permeates the field of dental implants. The aim of the prese...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjw069
更新日期：2017-10-01 00:00:00
abstract：:The aim of this study was to identify the craniofacial characteristics of 16 osteogenesis imperfecta (OI) patients, 10 males and 6 females, aged 7-15 years. The control group comprised 863 Chinese children from 6 to 18 years of age. Eleven cephalometric reference points and 25 variables were measured on the lateral ce...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjl035
更新日期：2007-06-01 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：BACKGROUND:Cervical headgear (CH) is a commonly used orthodontic appliance and its dentoalveolar changes are known. However, the effects related to gender and timing have gained less attention. OBJECTIVES:To examine dimensions of dental arches among children with Class II occlusion without posterior mandibular rotatio...
journal_title：European journal of orthodontics
pub_type： 杂志文章,随机对照试验
doi：10.1093/ejo/cjy083
更新日期：2019-11-15 00:00:00
