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 microscope with its customized computer program. Sixty study models (30 maxillary and 30 mandibular) were measured using each technique on two separate occasions. The results showed the reflex microscope method to be the most reproducible, followed by the visual examination and brass wire methods. When testing for validity, as there is no absolutely accurate standard of arch measurement, the individual methods must be compared with one another. From the results, it was seen that the mean values for dental crowding using the reflex microscope, in both the upper and lower arches, were very close to a value which equalled the average obtained from the two means of the visual examination and brass wire methods. The results also indicated that the visual examination and brass wire methods showed a positive bias towards over- and underestimating the degree of crowding, respectively.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Johal AS,Battagel JMdoi
10.1093/ejo/19.5.543subject
Has Abstractpub_date
1997-10-01 00:00:00pages
543-51issue
5eissn
0141-5387issn
1460-2210journal_volume
19pub_type
杂志文章abstract：:Lateral-skull radiographs were used to examine the hard and soft tissue changes following overjet reduction in 62 children with moderately severe Class II division 1 malocclusions. Thirty-two patients were treated by non-extraction methods using Fränkel appliances, and the remainder by a standard Edgewise technique in...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/12.2.154
更新日期：1990-05-01 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：AIMS:The aim of this work was to investigate the effects of commonly used orthodontic appliances on the magnetic resonance (MR) image quality of the craniofacial region, with special interest in the soft palate and velopharyngeal wall using real-time speech imaging sequences and anatomical imaging of the temporomandibu...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cju103
更新日期：2015-12-01 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：:The aim of the present study was to establish whether the early signs of various orofacial dysfunctions, malocclusions, or occlusal interferences can predict the development of temporomandibular dysfunction (TMD) in young adults. Forty-eight subjects referred for speech therapy and 49 controls participated in all four...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/26.4.367
更新日期：2004-08-01 00:00:00
abstract：:Occlusal traits and craniofacial morphology were studied in growing patients with Duchenne muscular dystrophy (DMD). Sixteen patients from 6 to 20 years of age were examined and compared with 16 healthy male individuals matched according to age. The dental arches and occlusal traits of both groups were analysed on den...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjm045
更新日期：2007-10-01 00:00:00
abstract：OBJECTIVES:To investigate mandibular morphology in adults affected by posterior unilateral crossbite (PUXB) and to evaluate the hemi mandibular volumes from the crossbite (CB) and non-CB sides of the same patients. METHODS:Thirty-eight cone beam computed tomography (CBCT) images were consecutively recruited and the Di...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjz106
更新日期：2020-01-29 00:00:00
abstract：:The aim of this study was to review recent randomized clinical trials (RCTs) dealing with the effectiveness of various modalities of orthopaedic/orthodontic expansion of maxillary arches with crossbite and the associated 6 month post retention stability. The study selection criteria included RCTs involving subjects wi...
journal_title：European journal of orthodontics
pub_type： 杂志文章,评审
doi：10.1093/ejo/cjr140
更新日期：2013-02-01 00:00:00
abstract：:The purpose of this study was to demonstrate the advantage of the finite helical axis (FHA) system in the biomechanical analysis of orthodontic tooth movement by comparing it with the rectangular coordinate (XYZ) system. Ten patients (6 females and 4 males, mean age 23 years 7 months) were selected. Maxillary canine r...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjm061
更新日期：2007-12-01 00:00:00
abstract：:The purpose of this investigation was to assess the vertical changes occurring in skeletal open bite patients treated orthodontically with different extraction patterns. The study was conducted using lateral cephalometric radiographs taken before and after treatment. Fifteen patients who had an anterior open bite (AOB...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/24.4.407
更新日期：2002-08-01 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 effect of contamination by dietary oil on acid etching has not been reported in the literature. If dietary oil adversely affects acid etching, then a decrease in bond strength is expected. This in vitro study investigated the bond strength of brackets bonded to tooth surfaces that had been contaminated with dietar...
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/19.2.109
更新日期：1997-04-01 00:00:00
abstract：:In this study, botulinum neurotoxin type A (BoTx/A) was injected into the temporalis and masseter muscles of growing rats to induce masticatory hypoactivity. Sixty, 30-day-old, male Long-Evans rats were randomly divided into four groups. BoTx/A was bilaterally injected in the masseter muscles in group I, in the tempor...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjq029
更新日期：2011-04-01 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：:Mechanical stress induces human periodontal ligament (PDL) cells to express an osteoblastic phenotype in vitro. Core binding factor a1 (CBFA1) is a key regulator of osteoblast differentiation. This study was designed to investigate the role of CBFA1 in alveolar bone remodelling, specifically the expression of CBFA1 me...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjq010
更新日期：2010-12-01 00:00:00
abstract：BACKGROUND:Hyaluronic acid (HA) is a major molecular component of the articular cartilage of the temporomandibular joint (TMJ) influencing joint lubrication. Functional lateral shift of the mandible (FLSM) can lead to malocclusion. This study investigated the effects of FLSM on HA metabolism and lubrication of the TMJ ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjaa012
更新日期：2020-02-29 00:00:00
abstract：:The aim of this study was to investigate the relationship between Turkish university students' awareness of malocclusion, their satisfaction with their personal dental appearance, and the severity of their occlusal irregularities. The sample consisted of 841 randomly selected university students, 522 (62.1 per cent) m...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjn083
更新日期：2009-04-01 00:00:00
abstract：:The purpose of this study was to investigate the effect of treatment of mandibular crowding with self-ligating and conventional brackets on dental arch variables. Fifty-six patients were selected from a pool of subjects satisfying the following inclusion criteria: non-extraction treatment in the mandibular or maxillar...
journal_title：European journal of orthodontics
pub_type： 临床试验,杂志文章
doi：10.1093/ejo/cjp123
更新日期：2010-06-01 00:00:00
abstract：:The purpose of this study was to perform a meta-analysis of articles to verify the mandibular changes produced by the Fränkel-2 (FR-2) appliance during the treatment of growing patients with Class II malocclusions when compared with untreated growing Class II subjects. The literature published from January 1966 to Jan...
journal_title：European journal of orthodontics
pub_type： 杂志文章,meta分析,评审
doi：10.1093/ejo/cjq033
更新日期：2011-02-01 00:00:00
abstract：:The present study reveals new data concerning the prenatal interrelationship between maturation of teeth and basicranial bones. By using radiographs of the mid-sagittal tissue segment of 43 human craniums, the developmental relationship between a well-defined stage of the central maxillary incisor development and the ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/15.2.149
更新日期：1993-04-01 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：:To study the effects of transforming growth factor beta 2 (TGF-beta 2) on bone resorption, cultures of 17-day-old foetal mouse metatarsal long bones were used. The long bone rudiments were cultured for 5 days in medium supplemented with 10% rat serum. The effects of TGF-beta 2 were studied at concentrations of 1, 4, a...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/16.2.130
更新日期：1994-04-01 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：: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 barrie...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/17.3.189
更新日期：1995-06-01 00:00:00
abstract：:This study investigated the influence of changing the antero-posterior (AP) and vertical proportions of the lower face on the rankings of facial attractiveness. Four hundred and fifty-four (219 males and 235 females) native Jordanians of various ages and professions rated the attractiveness of a sequence of antero-pos...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjq028
更新日期：2011-02-01 00:00:00
abstract：:The purpose of this study was to qualitatively and quantitatively assess the nickel, chromium, and ferrous levels in a population of 17 orthodontic patients undergoing treatment, compared with seven untreated individuals, employing a novel methodological approach and a new analytical technique. Salivary samples obtain...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/25.1.103
更新日期：2003-02-01 00:00:00
abstract：BACKGROUND:There are few cost evaluation studies of orthodontic retention treatment. The aim of this study was to compare the costs in a randomized controlled trial of three retention methods during 2 years of retention treatment. MATERIALS/METHODS:To determine which alternative has the lower cost, a cost-minimization...
journal_title：European journal of orthodontics
pub_type： 杂志文章,随机对照试验
doi：10.1093/ejo/cjt070
更新日期：2014-08-01 00:00:00
abstract：:The objective of the present study was to evaluate the cytotoxicity and degree of monomer conversion of resin-reinforced glass ionomer cements (RGIC) over different time periods. Four RGICs: Fuji Ortho LC (FOLC), Fuji Ortho Band (FOB), Orthoglass (OGL), and Multicure Glass Ionomer (MCI) were evaluated for cytotoxicity...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjr009
更新日期：2012-06-01 00:00:00
abstract：:The aim of this in vitro study was to investigate both shear bond strength (SBS) by shear testing of indirectly bonded brackets, and the accuracy of a new transfer method, the Aptus bonding device (ABD). For comparison, the SBS of directly bonded brackets in two experimental arrangements was also measured. The precisi...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjm094
更新日期：2008-02-01 00:00:00
abstract：:The aim of this investigation was to compare the traditional method of manual cephalometric tracing with four different computerized tracing programs, where the lateral cephalograms were scanned at 300 dpi and digitized onscreen. Thirty randomly selected cephalometric radiographs were used in this study. Four programs...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjr008
更新日期：2012-06-01 00:00:00
