Abstract：
:The aim of the present study was to develop an index specifically for the measurement of treatment complexity. Input factors were directly related to complexity, and the output was a score measuring the degree of treatment complexity. The sample comprised 120 sets of dental casts, 30 for each of the four main malocclusion classes. Sixteen orthodontists graded the study casts for perceived treatment complexity on a six-point scale and then listed, in order of importance, up to three occlusal features which they felt contributed to complexity from a pre-determined list. Multiple regression analysis was used to derive weightings for each occlusal feature, which would reflect the relevant treatment complexity. In order to obtain an overall treatment complexity score for each case, weightings were then multiplied by the corresponding occlusal feature scores and summed. The relationship between treatment complexity scores and perceived complexity was examined using Spearman's ranked correlation coefficient. The regression equation explained 49.5 per cent of the variance in treatment complexity of the whole sample. Regression analysis on the basis of malocclusion produced R (2) values of 90.7 per cent for Class I, 42.6 per cent for Class II division 1, 62.3 per cent for Class II division 2, and 79.5 per cent for Class III malocclusions. The index of orthodontic treatment complexity (IOTC) scores showed a moderate but highly significant association with the orthodontists' perceived complexity assessments (rho = 0.42, P = 0.000). The proposed IOTC shows sufficient promise to warrant further development.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Llewellyn SK,Hamdan AM,Rock WPdoi
10.1093/ejo/cjl080subject
Has Abstractpub_date
2007-04-01 00:00:00pages
186-92issue
2eissn
0141-5387issn
1460-2210pii
cjl080journal_volume
29pub_type
杂志文章abstract：:This in vitro study investigated the influence of using different combinations of bracket, adhesive, and light-curing source on the tensile bond strength to porcelain and on failure patterns at debonding. Tensile tests were performed using: one ceramic bracket versus one metal bracket, two orthodontic composites; type...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjr043
更新日期：2012-08-01 00:00:00
abstract：:SummaryFine orthodontic treatment results are fine. Fine stable results are finer. But when is stability achieved? Many studies show that the decline from optimal alignment and occlusion is most rapid immediately after appliance removal and slows down after some three to five years. For stabilization, we need some for...
journal_title：European journal of orthodontics
pub_type： 评论,杂志文章
doi：10.1093/ejo/cju069
更新日期：2015-08-01 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：:The aims of this study were to investigate the effects of two surface-conditioning methods on the shear bond strength (SBS) of metal brackets bonded to three different all-ceramic materials, and to evaluate the mode of failure after debonding. Twenty feldspathic, 20 fluoro-apatite, and 20 leucite-reinforced ceramic sp...
journal_title：European journal of orthodontics
pub_type： 杂志文章,随机对照试验
doi：10.1093/ejo/cjq132
更新日期：2011-12-01 00:00:00
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
更新日期：1996-04-01 00:00:00
abstract：:This study was designed to explore a new method for the assessment of dental crowding from study models, which would be both valid and reproducible. This was then tested against two previously reported strategies. A single examiner compared the following methods: visual examination, brass wire/callipers, and a reflex ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/19.5.543
更新日期：1997-10-01 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：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：: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 role of matrix metalloproteinases (MMPs) in response to mechanical forces in orthodontic tooth movement has only been partially clarified. In the present in vivo pilot study, the presence, levels, and degree of activation of MMP-1 and -8 were measured daily for 1 month in gingival crevicular fluid (GCF) of patient...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjh097
更新日期：2005-04-01 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：: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：: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：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：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
更新日期：2018-01-23 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：: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 aimed to examine the skeletal, dental, and soft tissue effects of the implant-supported pendulum (ISP) and the zygoma anchorage system (ZAS) used for the distalization of maxillary posterior teeth. Among 30 patients showing Angle class II malocclusion, 15 patients with a mean age of 14.3±1.6 years and treat...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjs059
更新日期：2013-08-01 00:00:00
abstract：:Katz's quantitative modification of Angle's occlusion classification has been found to have a high intra- and inter-examiner agreement among orthodontists. In the present study an attempt was made to introduce a 'combined' system comprising Katz's modification and overjet/overbite millimetric measurements in order to ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/22.2.169
更新日期：2000-04-01 00:00:00
abstract：:This clinical study evaluated factors related to root resorption before (T1) and after (T2) orthodontic treatment. Ninety-six subjects between 9 and 34 years (34 males and 62 females) who had been treated using fixed appliances for at least 1 year and who had panoramic radiographs at T1 and T2 were selected. The relat...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjp165
更新日期：2010-12-01 00:00:00
abstract：:This radiographic study analysed the changes that occurred in the airway and surrounding structures when subjects with sleep disordered breathing moved from the upright to the supine position. Radiographs of 100 dentate, Caucasian males were examined. Fifty individuals were non-apnoeic snorers and in 50 a diagnosis of...
journal_title：European journal of orthodontics
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更新日期：2002-06-01 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
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
更新日期：2015-12-01 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：: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：: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
更新日期：1991-04-01 00:00:00
abstract：:The persistence of childlike deglutition after the replacement of deciduous teeth is described as atypical deglutition. This condition has been attributed to sucking action without nutritive purposes, use of a feeding bottle, oral respiration, and anatomical abnormalities. Among the possible anatomical alterations, th...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjq167
更新日期：2012-02-01 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：: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：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
