Abstract：
:The age- and gender-related shape variations of the craniofacial skeleton in skeletal Class I children were quantified using a Fourier analysis on the pre-treatment lateral head films of 122 orthodontic patients (age range 7-15 years), who were subdivided into six groups for sex and age (2-year intervals). Seven landmarks representative of the maxillo-mandibular sagittal and vertical relationship were identified and digitized. The contiguous landmarks were connected by segments, the form was normalized with respect to its orientation and size, and a Fourier analysis of the contour was performed. Mean values of the cosine and sine coefficients of the first six harmonics in the sex and age classes were computed. The size-standardized outlines of the oldest boys were narrower and longer than the outlines of the youngest boys (differences at gonion, menton, sella and nasion). Shape differences between mean plots in girls were negligible. In the youngest patients, girls had a larger size-independent shape in the mandibular region; their shape was narrower (anterior-posterior direction) and longer (vertical direction) than male shape. In the oldest patients, boys had a larger size-independent shape at gonion, and a narrower shape at articulare and pogonion than girls. Size increased from the youngest to the oldest boys; size differences were not conspicuous in girls. Within an age class, male size was always larger than female. Fourier analysis allowed a global evaluation of the cephalometric forms, with separate quantifications of the age- and gender-related differences in size and shape.
journal_name
Eur J Orthodjournal_title
European journal of orthodonticsauthors
Ferrario VF,Sforza C,Poggio CE,Colombo A,Cova Mdoi
10.1093/ejo/19.6.669subject
Has Abstractpub_date
1997-12-01 00:00:00pages
669-80issue
6eissn
0141-5387issn
1460-2210journal_volume
19pub_type
杂志文章abstract：:Laser scanning can be used to visualize the face in three dimensions. These scans can then be processed to enable assessment of facial changes. The aim of this single-centre, prospective, longitudinal, cohort study was to investigate whether four different visualization methods correctly represented facial changes occ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjl037
更新日期：2007-02-01 00:00:00
abstract：:The aim of this investigation was to evaluate the effects of different tooth types on the shear bond strength (SBS) of two orthodontic resin adhesive systems in vitro. Two hundred extracted sound human teeth were used in the study. Ten teeth of each tooth type were the mounted in acrylic resin leaving the buccal surfa...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjn006
更新日期：2008-08-01 00:00:00
abstract：:Unilateral tip-back mechanics are challenging because of a number of undesirable side-effects associated with their use during orthodontic treatment. The purpose of this paper is to review the differential diagnosis and treatment planning of Class II subdivision malocclusions and present a treatment strategy based on ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/19.1.93
更新日期：1997-02-01 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
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：:The aims of this study were two-fold. First to compare the perceptions of African dental aesthetics as determined by a panel of black African Senegalese and French Caucasian judges, and second to compare the sensitivity and specificity of both components of the Index of Orthodontic Treatment Need (IOTN) and the Index ...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cji030
更新日期：2005-12-01 00:00:00
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 th...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/26.1.105
更新日期：2004-02-01 00:00:00
abstract：:Premature and low birth weight infants often require neonatal oral intubation for resuscitation and to relieve respiratory distress. The endotracheal tube exerts pressure on the developing palate, which can result in palatal groove formation, a high-arched palate, and palatal asymmetry. The purpose of this investigati...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/21.6.703
更新日期：1999-12-01 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：BACKGROUND/OBJECTIVE:Chondrogenesis is an integral part of endochondral bone formation, by which the midline cranial base is developed. Reactive oxygen species (ROS) are required in chondrogenic differentiation and antioxidant enzymes regulate their levels. The aim of this study was to localize the antioxidant enzyme g...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cju045
更新日期：2015-06-01 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 objective of the present investigation was to determine the intrapulpal temperature changes and to compare the shear bond strength (SBS) of bondable buccal tubes bonded by high-intensity light sources. Ninety caries-free human first molar teeth extracted for periodontal reasons were used. For the temperature measu...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjn013
更新日期：2008-08-01 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：: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：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：:Using lateral cephalograms and a jaw movement-recording system, the relationship between the masticatory movement path and dentofacial morphology was investigated in 17 subjects (9 males and 8 females, mean age 23.5 years) without a history of orthodontic treatment. The masticatory movement path was measured at the ri...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjl036
更新日期：2007-02-01 00:00:00
abstract：:Orthodontics as health care is sometimes at odds with modern marketing with its strong focus on aesthetics. In this commentary, I highlight how important it is that research of orthodontic treatment as a value for the entire community is performed and published. ...
journal_title：European journal of orthodontics
pub_type： 评论,杂志文章
doi：10.1093/ejo/cjs081
更新日期：2013-04-01 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：BACKGROUND:Cervical headgear (CH) is a commonly used orthodontic appliance and its dentoalveolar changes are known. However, the effects related to gender and timing have gained less attention. OBJECTIVES:To examine dimensions of dental arches among children with Class II occlusion without posterior mandibular rotatio...
journal_title：European journal of orthodontics
pub_type： 杂志文章,随机对照试验
doi：10.1093/ejo/cjy083
更新日期：2019-11-15 00:00:00
abstract：Background/objective:To assess the validity and reliability of a series of three questionnaires for the quantification of patient perception of fixed appliance orthodontic treatment. Subjects and methods:The study was carried out at the University of Dundee with content and face validity being assessed using proformas...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjw076
更新日期：2017-08-01 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：: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
abstract：Background:Hawley retainers (HRs) and vacuum formed retainers (VFRs) are the most commonly used removable retainers in the orthodontic practice. Patients' cooperation in wearing these appliances is affected by the levels of discomfort and oral impairment. The evidence regarding their acceptably among orthodontic patien...
journal_title：European journal of orthodontics
pub_type： 杂志文章,随机对照试验
doi：10.1093/ejo/cjx024
更新日期：2017-08-01 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：:Class II elastics are usually employed in the treatment of excessive overbite and overjet with the Begg technique. The effect of Class II elastics on bite opening and the extent of such an effect is uncertain. This article, based on measurements of 30 cases, illustrates that the effect of the vertical component of for...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/14.4.280
更新日期：1992-08-01 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 purpose of this work was to examine whether the clinical eruption of the permanent first molars and incisors is affected by pre-term birth. The data applied to 328 prematurely born white and black children and 1804 control children who participated in the Collaborative Perinatal Project (USA) in the early 1960s an...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/25.3.293
更新日期：2003-06-01 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 aim of this study was to compare the effects of the Gjessing (PG) retraction spring used with and without the zygoma anchorage system (ZAS) on canine retraction. Thirty patients, with an Angle Class I or Class II malocclusion, whose upper first premolars were scheduled for extraction, were divided into two equal g...
journal_title：European journal of orthodontics
pub_type： 杂志文章
doi：10.1093/ejo/cjp167
更新日期：2010-10-01 00:00:00
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
