Abstract：
:The purpose of this study was to determine whether quantitative light-induced fluorescence (QLF) could detect very early demineralization and remineralization longitudinally adjacent to orthodontic components in an in vitro model. Extracted human premolars (n = 13) were sectioned sagittally to produce two equal halves and an orthodontic cleat was bonded to the buccal surface of each tooth. Transparent nail varnish was placed over the remaining surface, leaving exposed enamel windows adjacent to the cleat on the coronal and gingival aspects. Each half-tooth was placed into the lid of an Eppendorf tube and randomly assigned to either control (distilled water) or experimental (lactic acid demineralizing buffer, pH 4.5) regimes. Digital photographs and QLF baseline images were taken. The tubes were mounted into a rotating holder and left for 24 hours. QLF and digital photographs were taken, the solutions refreshed and the teeth returned. This was continued every 48 hours for 288 hours. At this time the lactic acid buffer was replaced with a remineralizing solution (artificial saliva, fluoride, calcium) and the experiment continued with weekly examinations. QLF images were analysed and deltaQ at the 5 per cent threshold recorded. Analysis of the QLF images showed that both demineralization and remineralization were identified and monitored. Statistical differences between each of the timed examinations were found (P < 0.05). Analysis of the photographs demonstrated that QLF detected subclinical lesions. This initial pilot study has demonstrated the potential for QLF to longitudinally monitor de- and re-mineralization of enamel adjacent to orthodontic cleats in vitro.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Pretty IA,Pender N,Edgar WM,Higham SMdoi
10.1093/ejo/25.3.217keywords:
subject
Has Abstractpub_date
2003-06-01 00:00:00pages
217-23issue
3eissn
0141-5387issn
1460-2210journal_volume
25pub_type
杂志文章abstract：:The effects of the van Beek activator in the correction of Class II, division 1 malocclusions were studied in 39 children, aged 9-13 years (median 11 years), and compared with the effects of treatment with an activator according to Herren and with those of an activator-headgear combination. Profile cephalograms were m...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/20.4.389
更新日期：1998-08-01 00:00:00
abstract：:Edgewise orthodontic treatment utilizes a force couple in order to achieve labial-lingual tooth angulation. Two self-ligating brackets (Damon Q and Speed) were examined across a range of clinically relevant torques in order to assess the loading and unloading curves and bracket deformation. A previously developed torq...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjr076
更新日期：2013-12-01 00:00:00
abstract：:This study evaluated the effect of sandblasting foil mesh molar tube bases on the shear bond strength obtained when bonding to first molar teeth. Fifty-two recently extracted first molar teeth were etched with 35 per cent phosphoric acid gel for 30 seconds. Twenty-six sandblasted 'A' Company molar tube attachments and...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/21.3.311
更新日期：1999-06-01 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：:In 69 individuals from a randomized epidemiological material comprising 450 adults, an intra-individual comparison of the periodontal condition of 73 mesially tipped molars (30 degrees or more to a line perpendicular to the occlusal plane) and contralateral upright molars was made. The alveolar bone level mesially and...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/14.6.449
更新日期：1992-12-01 00:00:00
abstract：:The aim of the present study was to compare patient, parent and clinician perceived need for orthodontic treatment in relation to normative orthodontic treatment need as measured by the Index of Orthodontic Treatment Need (IOTN). A prospective cross-sectional study was designed to address this aim. The sample comprise...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/26.3.265
更新日期：2004-06-01 00:00:00
abstract：Objective:To assess the dental, skeletal, and profile changes after functional appliances and subsequent fixed appliances treatment in order to quantify their effect and evaluate the influence of initial incisal inclination and growth pattern. Materials and methods:A retrospective cephalometric analysis was performed ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjw064
更新日期：2017-06-01 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：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：BACKGROUND:This study aimed to assess the reporting of the methodological quality of search strategies undertaken in orthodontic quantitative systematic reviews (SRs) and hence their reproducibility. MATERIALS AND METHODS:A search of a single electronic database (Medline via PubMed) was undertaken to identify interven...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjaa078
更新日期：2020-12-26 00:00:00
abstract：:The aim of this investigation was to study symptoms of temporomandibular disorders (TMD) and headaches longitudinally in girls with Class II malocclusions receiving orthodontic treatment in comparison with subjects with untreated Class II malocclusions and girls with normal occlusion, and to evaluate the need and dema...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/22.3.283
更新日期：2000-06-01 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
pub_type： 杂志文章
doi：10.1093/ejo/cjn114
更新日期：2009-08-01 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：:It is well known that mastication has a significant influence on mandibular growth and development, but the mechanism behind this effect has not yet been clarified. Furthermore, no studies have examined the effects of changes in mastication on the three-dimensional (3D) morphometry of the mandible. The aim of the pres...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjp060
更新日期：2010-02-01 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：Background:Orthodontic diagnostic standards generally use the cranial base as a reference and rely on samples selected by orthodontists. Objective:The purpose of this study was to provide male and female standards for a novel non-radiographic approach for orthodontic diagnosis that utilizes 3D dentofacial photogrammet...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjw055
更新日期：2017-04-01 00:00:00
abstract：:The present review summarizes two decades of published and unpublished studies on normal and pathological development of sella turcica and pituitary gland in humans. The pathological conditions are studied in known genotype deviations, syndromes, and other malformations. The studies include histological analyses of hu...
journal_title：European journal of orthodontics
pub_type： 杂志文章,评审
doi：10.1093/ejo/cjs091
更新日期：2015-02-01 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 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：: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：:Various studies have reported a significant reduction in tensile bond strength of brackets when bonding is carried out immediately after bleaching. The purpose of this investigation was to determine the effect of an antioxidant agent on the tensile bond strength values of metal brackets bonded with composite resin to ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cji044
更新日期：2005-10-01 00:00:00
abstract：:This study investigated the changes in the initial centres of rotation (Crot) of the upper six anterior teeth in response to a horizontal load. Six upper anterior teeth were extracted, splinted as a unit, and embedded in dental stone after the roots were uniformly coated with silicone. An aluminium fixture was bonded ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjl023
更新日期：2006-10-01 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：:A clinical trial was undertaken to assess the value of incorporating fluoride released from a commercially available bonding adhesive (Rely-a-Bond) to determine the extent of any protection provided against enamel decalcification. Fifty patients undergoing fixed appliance therapy were included in the trial. Contralate...
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/19.4.391
更新日期：1997-08-01 00:00:00
abstract：Objectives:To assess arch width, palatal surface area, and volume in surgically treated unilateral cleft lip and palate (UCLP) in mixed dentition children in comparison with non-cleft lip and palate (NCLP) children using a 3D laser scanning. Materials and Methods:38 subjects (Caucasian origin), 5.63-11.9 years of age ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjx019
更新日期：2017-11-30 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 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：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：:The purpose of this study was to describe condylar growth and mandibular remodelling changes associated with bionator therapy. Twenty-five patients (15 males and 10 females) between 6.9 and 11.2 years of age with Class II division 1 malocclusions were randomly allocated to either control (n = 11) or treatment (n = 14;...
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/26.5.515
更新日期：2004-10-01 00:00:00
abstract：:The purpose of this study was to assess quantitatively the roughness of the enamel surface following debonding using two resin removal methods. The enamel surface of 30 premolar crowns was covered with black tape with a 3 mm window on the middle buccal third to standardize the area of analysis. The initial enamel surf...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/26.3.333
更新日期：2004-06-01 00:00:00
