Abstract：
:This ex vivo study compared the static and kinetic frictional resistance of eight different archwires tested in a single, stainless steel, zero base 0.022 x 0.028 inch (0.56 x 0.711 mm) slot standard edgewise bracket. The archwires evaluated were 0.019 x 0.025 inch (0.483 x 0.636 mm) in dimension, manufactured from the following alloys: beta titanium (TMA), 'low friction' coloured beta titanium (aqua, honeydew, purple and violet), ion-implanted beta titanium, Timolium and a stainless steel control. Prior to friction testing, bracket and archwire dimensions were measured by direct digital imaging via a desktop computer linked to a binocular light microscope. Frictional force was evaluated using an Instron universal testing machine. All experiments were carried out at room temperature, with no ligation, in the dry state with 20 degrees of added torque. The results demonstrated that static and kinetic friction were statistically significant (P < 0.001) for all archwire types. Ion-implanted and standard TMA archwires were found to have no significant advantage over stainless steel. The archwire alloys may be ranked as follows: stainless steel produced the lowest frictional resistance followed by honeydew, ion-implanted TMA and Timolium, with aqua, purple and violet producing frictional resistance values as high as standard TMA. It was also found that the percentage difference between the archwire and bracket slot dimensions claimed by the manufacturers and those measured in this experiment produced tolerances ranging from +5.37 to -6.67 per cent.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Cash A,Curtis R,Garrigia-Majo D,McDonald Fdoi
10.1093/ejo/26.1.105keywords:
subject
Has Abstractpub_date
2004-02-01 00:00:00pages
105-11issue
1eissn
0141-5387issn
1460-2210journal_volume
26pub_type
杂志文章abstract：OBJECTIVES:Mastication is an essential function that prepares the food for swallowing and digestion and may be related to nutritional status. Thus, the aims of this study were to evaluate the masticatory parameters in overweight and obese children and the relation between bite force and anthropometric evaluation, food ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjv092
更新日期：2016-08-01 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：: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
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doi：10.1093/ejo/23.5.507
更新日期：2001-10-01 00:00:00
abstract：:Reduced nasal airflow can be the result of enlarged adenoids, hypertrophic turbinates, severely deviated nasal septum, or even narrow nasal cavities. The question of whether the width of the nasal cavity may influence certain facial dimensions examined on the postero-anterior cephalometric X-ray was evaluated through ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/13.5.410
更新日期：1991-10-01 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
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更新日期：2018-05-25 00:00:00
abstract：OBJECTIVE:To compare orthodontically induced inflammatory root resorption (OIIRR) and patient perception of pain during orthodontic treatment between 0.018-inch and 0.022-inch slot bracket systems. SUBJECTS AND METHODS:Eligible participants aged 12 years or above were allocated to treatment with the 0.018-inch or 0.02...
journal_title：European journal of orthodontics
pub_type： 杂志文章,随机对照试验
doi：10.1093/ejo/cjy039
更新日期：2019-03-29 00:00:00
abstract：:The purpose of the present study was to compare the cranio-facial morphology in children with and without enlarged tonsils. The material consisted of 73 children with enlarged tonsils, and a control group of children with normal tonsils, matched for age, sex, and number. The mean age for the groups was 10.1 and 10.0 y...
journal_title：European journal of orthodontics
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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
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journal_title：European journal of orthodontics
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doi：10.1093/ejo/cjp144
更新日期：2010-08-01 00:00:00
abstract：:This investigation was designed to repeat classic studies into the associations between head posture and growth as a single unified study using up-dated methods for gathering and analysing the data. The material comprised the cephalometric radiographs of 59 children (34 males and 25 females) recorded in natural head p...
journal_title：European journal of orthodontics
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doi：10.1093/ejo/cjq131
更新日期：2012-08-01 00:00:00
abstract：:As orthodontic appliances can corrode with time in the oral environment, the aim of this study was to compare the release of metal ions from new and recycled brackets immersed in buffers of different pH values over a 48 week period. To simulate commercial recycling, the stainless steel brackets were divided into two g...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/26.2.171
更新日期：2004-04-01 00:00:00
abstract：:The aim of this research was to evaluate the effect of the Delaire surgical technique on the midfacial morphology in a group of subjects with a congenital unilateral cleft of lip and palate (UCLP), prior to orthodontic treatment. Thirty-five UCLP (15 left and 20 right) patients (16 males and 19 females, mean age 7.03+...
journal_title：European journal of orthodontics
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doi：10.1093/ejo/cjn068
更新日期：2009-02-01 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：:The purpose of the present study was to evaluate the accuracy and reliability of airway volume digital measurements of cone-beam computed tomography (CBCT) compared with the manual measurements of an airway model. An acrylic airway model was constructed and attached to a human dry skull in the natural position of the ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjr099
更新日期：2013-04-01 00:00:00
abstract：:The aim of this study was to determine whether Fluor Protector, a fluoride varnish, applied to molars before orthodontic banding could prevent white spot formation. In the in vitro study 93 human premolars were used, divided in five different groups, representing different clinical situations. Each tooth was sliced in...
journal_title：European journal of orthodontics
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更新日期：1990-08-01 00:00:00
abstract：:Tensile bond strength and bond failure location were evaluated in vitro for two types of aesthetic brackets (non-silanated ceramic, polycarbonate) and one stainless steel bracket, using bovine teeth as the substrate and diacrylate resin as the adhesive. The results show that metallic bracket had the highest bond stren...
journal_title：European journal of orthodontics
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更新日期：1999-02-01 00:00:00
abstract：:Different types of ipriflavone (IF) have been reported to be effective when used as a remedy for bone loss due to osteoporosis. However, no information is available regarding the relationship between IF and jaw bone structure. The aim of this study was to examine the effect of IF on rat mandibles during the growth sta...
journal_title：European journal of orthodontics
pub_type： 杂志文章
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更新日期：2005-02-01 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
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更新日期：2008-08-01 00:00:00
abstract：:In 138 successfully treated Class II division 1 patients (40 Activator and 98 Herbst) effective temporomandibular joint (TMJ) growth changes (a summation of condylar remodelling, glenoid fossa remodelling, and condylar position changes within the fossa), and their influence on the position of the chin and the rotation...
journal_title：European journal of orthodontics
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更新日期：2002-12-01 00:00:00
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journal_title：European journal of orthodontics
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更新日期：1989-02-01 00:00:00
abstract：OBJECTIVES:The aim of this study was to evaluate the cephalometric outcome of bone-anchored maxillary protraction (BAMP) in individuals with unilateral complete cleft lip and palate (UCLP). MATERIAL AND METHODS:The experimental group (EG) comprised 23 individuals (17 males and 6 females) with UCLP and a mean age of 11...
journal_title：European journal of orthodontics
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更新日期：2019-09-21 00:00:00
abstract：:Some Class II malocclusions are due, at least in part, to a retruded lower dental arch relative to the mandibular body. The purpose of this study was to determine if a direct anterior force on the lower incisors could lead to bodily movement of these teeth. Twenty-seven patients (9 males, 18 females; mean age: 9.8 yea...
journal_title：European journal of orthodontics
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doi：10.1093/ejo/cjn114
更新日期：2009-08-01 00:00:00
abstract：Objective:To evaluate the transverse relationships of the first permanent molars after the correction of posterior crossbite performed during the deciduous dentition with two different treatment protocols. Materials/methods:Ninety patients (40 males and 50 females) with posterior crossbite were treated during the deci...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjw080
更新日期：2017-10-01 00:00:00
abstract：:The aim of this study was to investigate potential occurrence of bacteremia in orthodontic patients after removal of miniscrews.The study group comprised 30 healthy subjects (17 males, 13 females) with a mean age of 24.1 years treated with self-ligating fixed appliances and mini-implant anchorage. Two 20 ml venous blo...
journal_title：European journal of orthodontics
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更新日期：2014-02-01 00:00:00
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journal_title：European journal of orthodontics
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更新日期：2020-12-26 00:00:00
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pub_type： 杂志文章
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更新日期：1994-10-01 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
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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
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更新日期：2005-06-01 00:00:00
abstract：Background/objectives:Maxillary tooth distal movement is a treatment option for Class II malocclusion. This prospective clinical study (split-mouth design) was aimed to compare chondroitin sulphate (CS) levels in gingival crevicular fluid (GCF), the rates of tooth movement, and patient pain and discomfort during segmen...
journal_title：European journal of orthodontics
pub_type： 杂志文章,随机对照试验
doi：10.1093/ejo/cjx092
更新日期：2018-09-28 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
