Abstract：
:The aim of this study was to test the hypothesis that there is no difference in salivary metal ion content between subjects with fixed orthodontic appliances and their same-gender sister or brother without any orthodontic appliance. This retrospective study was carried out on 28 subjects (16 females and 12 males) who had undergone fixed orthodontic therapy for a duration of 12-18 months. In order to limit the effects of dietary and hygiene habits on salivary metal ion concentration, a same-gender brother or sister (total of 28 subjects) was selected as a control. Approximately 5 ml of saliva was collected from each subject, and the samples were analysed using an atomic absorption spectrophotometer. The detection limit of the method for sample solutions was 1 ng/ml. Since some variables were not normally distributed, non-parametric tests (Mann-Whitney U and Wilcoxon W) were used for statistical analysis. The mean salivary nickel (Ni) content in subjects with and without a fixed orthodontic appliance was 18.5 ± 13.1 and 11.9 ± 11.4 ng/ml, respectively. A statistically significant difference (P < 0.035) was found between the two groups. The mean salivary chromium (Cr) ion level recorded was 2.6 ± 1.6 ng/ml in the study group and 2.2 ± 1.6 ng/ml in the control group. The difference, however, was statistically insignificant. Within the limits of this in vivo study, it can be concluded that the presence of fixed orthodontic appliances leads to an increased concentration of metal ions in salivary secretions.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Amini F,Jafari A,Amini P,Sepasi Sdoi
10.1093/ejo/cjq181subject
Has Abstractpub_date
2012-02-01 00:00:00pages
126-30issue
1eissn
0141-5387issn
1460-2210pii
cjq181journal_volume
34pub_type
杂志文章abstract：:The aim of this laboratory-based study was to investigate the effects of different combinations of tip and torque upon friction between an orthodontic bracket and archwire using a specially made jig. Victory Twin Series upper premolar brackets (3M Unitek) were mounted on a jig, which allowed tip and torque values in t...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjn017
更新日期：2008-10-01 00:00:00
abstract：:This study investigated the prevalence of bacteraemia on removal of fixed appliances. Venous blood samples were taken before and after debonding and debanding for 30 patients (mean age 17 years 8 months) who had worn fixed appliances for an average of 19 months. Before removal of the fixed appliances, bacteraemia was ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/26.4.443
更新日期：2004-08-01 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：:It was the aim of the present study to cast light on the role of the mandible in relation to head posture and airway space by evaluating patients before and after surgical correction of mandibular prognathism. The material comprised standardized profile cephalograms of 52 patients with mandibular prognathism. All pati...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/oxfordjournals.ejo.a035962
更新日期：1989-02-01 00:00:00
abstract：:It has been suggested that subjects with increased vertical craniofacial dimensions have relatively oblique orientated jaw muscles with a reduced possibility to restrain the vertical component of craniofacial growth. To test this hypothesis, relationships were investigated between the spatial orientation of the jaw mu...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/19.3.313
更新日期：1997-06-01 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：OBJECTIVE:This prospective randomized clinical trial investigated the impact of different tooth brushing strategies and sealant application on patients with fixed appliances: plaque, gingival, caries index scores, periodontal parameters, microbial, and molecular biological parameters were assessed. MATERIALS AND METHO...
journal_title：European journal of orthodontics
pub_type： 杂志文章,随机对照试验
doi：10.1093/ejo/cjt043
更新日期：2014-04-01 00:00:00
abstract：:The purpose of this study was to evaluate the outcome of a scheme for provision of orthognathic surgery by examining whether patients' expectations were fulfilled as well as their opinions about the result of treatment and side-effects. Data were obtained during a pre-planned 3-year follow-up clinical examination whic...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjm081
更新日期：2008-02-01 00:00:00
abstract：:Seven-hundred-and-ninety-one 15-year-olds were subjected to an anamnestic and clinical examination of craniomandibular disorders. These individuals had been examined at the age of 12 years and this is one section of an extensive longitudinal investigation into the effects of malocclusion, and the effectiveness of orth...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/14.2.152
更新日期：1992-04-01 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：: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：:A high prevalence of cervical vertebrae anomalies (CVA) has been recently associated with various malocclusions. Our aim was to study the prevalence of CVA on lateral cephalograms in Class II subjects and to compare the findings with those obtained from cone beam computed tomography (CBCT). Standardized cephalograms o...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjq192
更新日期：2012-04-01 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：: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 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 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：:Fifteen patients, eight males and seven females with a mean age of 13.32 years, were selected for unilateral molar distalization. Dentally, all presented with a unilateral Class II molar relationship. The subjects were all in the permanent dentition with second molars erupted and with a well aligned lower dental arch....
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/23.5.507
更新日期：2001-10-01 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：:The purpose of this study was to examine the mechanical behaviour of orthodontic delta retraction springs. Twelve titanium-molybdenum (0.016 × 0.022 inch) delta loops were studied. The springs were analysed by means of the finite element (FE) method and experimental tests using a platform transducer. Each spring was a...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjr062
更新日期：2013-08-01 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：:Pre-treatment, end of treatment, and post-retention study models of 30 subjects with a Class II division 2 malocclusion were assessed, after a period of at least 3 years, in order to evaluate the long-term changes in occlusion, alignment, and arch dimensions. Molar relationship correction was found to be stable after ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/21.4.377
更新日期：1999-08-01 00:00:00
abstract：:The purpose of this study was to investigate cephalometrically, the effects of a functional appliance-headgear combination, the Elastic Bite-block (EBB). Of 50 Class II division 1 subjects who participated in this study, 30 made up the treatment group and 20 the control group. All of the selected cases exhibited mandi...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/17.5.375
更新日期：1995-10-01 00:00:00
abstract：SUMMARY:The aim of this study was to measure lingual volume and to correlate it with and predict it from the area of the radiographic shadow of the tongue as well as with demographic and biometric characteristics. In 70 healthy subjects (35 males and 35 females) aged between 20 and 37 years, tongue volume was determine...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjp105
更新日期：2010-08-01 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：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：: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：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：:Cervical column morphology was examined in adult patients with obstructive sleep apnoea (OSA) and compared with the cervical morphology of an adult control group with neutral occlusion, normal craniofacial morphology, and no history of sleep apnoea. The sleep apnoea group consisted of 91 patients, 16 females aged 29-5...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjn028
更新日期：2008-10-01 00:00:00
abstract：:The purpose of the study was to evaluate differences in dental arch morphology among an orthodontic sample of 386 untreated adult females between 17 and 68 years of age, categorized by age group (17-25 years, 26-35 years, or 35+ years) and malocclusion (Class I, Class II division 1, or Class II division 2). The result...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/16.1.47
更新日期：1994-02-01 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
