British journal of orthodontics最新文献

At a crossroads: health and vulnerability in the era of AIDS 十字路口:艾滋病时代的健康与脆弱性

British journal of orthodontics Pub Date : 2018-06-14 DOI: 10.4324/9781315725932-33

Elizabeth Mills

引用次数: 0

Re: Forestadent travel award. 回复:学生旅游奖。

British journal of orthodontics Pub Date : 1999-12-01 DOI: 10.1093/ortho/26.4.334

J D Atherton, H C Moseley

引用次数: 0

The bedfordshire PDS orthodontic pilot. 贝德福德郡PDS正畸飞行员。

British journal of orthodontics Pub Date : 1999-12-01 DOI: 10.1093/ortho/26.4.342

C J Kettler

引用次数: 4

Recent developments in clinical photography. 临床摄影的最新进展。

British journal of orthodontics Pub Date : 1999-12-01 DOI: 10.1093/ortho/26.4.269

J Sandler, A Murray

引用次数: 12

Editorial: british journal of orthodontics & millennium-drawing to a close! 社论:英国正畸与千年杂志即将结束!

British journal of orthodontics Pub Date : 1999-12-01 DOI: 10.1093/ortho/26.4.299

Jones

引用次数: 1

Electronic orthodontics. 电子等。

British journal of orthodontics Pub Date : 1999-12-01 DOI: 10.1093/ortho/26.4.300

R Hobson

引用次数: 0

Cortical bone screws for maxillomandibular fixation in orthognathic surgery. 皮质骨螺钉在正颌手术中用于上下颌固定。

British journal of orthodontics Pub Date : 1999-12-01 DOI: 10.1093/ortho/26.4.325

L G Thota, D A Mitchell

引用次数: 16

Reviews and abstracts 综述和摘要

British journal of orthodontics Pub Date : 1999-12-01 DOI: 10.1093/ortho/26.4.336

引用次数: 0

Random errors in localization of landmarks in postero-anterior cephalograms. 脑后前位造影中标记定位的随机错误。

British journal of orthodontics Pub Date : 1999-12-01 DOI: 10.1093/ortho/26.4.273

A E Athanasiou, R Miethke, A J Van Der Meij

{"title":"Random errors in localization of landmarks in postero-anterior cephalograms.","authors":"A E Athanasiou, R Miethke, A J Van Der Meij","doi":"10.1093/ortho/26.4.273","DOIUrl":"https://doi.org/10.1093/ortho/26.4.273","url":null,"abstract":"The aim of the present study was to evaluate the random error in localization of the most common landmarks in postero-anterior cephalograms (PAC). The study took place at the Department of Orthodontics of Aarhus University during the period 1993-1995. The material consisted of 30 standardized PAC taken in natural head position. Five examiners had to identify 34 landmarks on each cephalogram. Subsequently, all examiners had to identify again the same 34 landmarks on one randomly selected cephalogram five times with a time interval of at least 24 hours. All landmarks were digitized, related to an X-Y co-ordinate system, and an arithmetical mean was calculated. The accuracy of digitizing was evaluated by digitizing one randomly selected cephalogram 10 times. The main findings of this study are: (1) The digitizing error is negligible compared to the errors introduced by landmark identification. (2) Each landmark has its own characteristic pattern of variance, which is very similar on both sides. (3) Significant differences in accuracy exist between the various postero-anterior landmarks. The six most accurate landmarks are mastoid left (l) and right (r), latero-orbitale (l) and (r), and antegonion (l) and (r). The six least accurate landmarks are coronoid (l) and (r), condylar (l) and (r), and mandibular foramen (l) and (r). (4) A significant difference in the accuracy of landmark identification between the five examiners was only seen for seven of the 34 landmarks. (5) No evidence was found that one examiner was consistently better/worse than the others. (6) No improvement in the accuracy was found after repeated identification, thus there seems to be no short-term 'learning process'. Refereed Paper","PeriodicalId":75621,"journal":{"name":"British journal of orthodontics","volume":"26 4","pages":"273-84"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/ortho/26.4.273","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21449418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 33

Factors affecting the shear bond strength of orthodontic brackets to porcelain. 影响正畸托槽与瓷的剪切粘结强度的因素。

British journal of orthodontics Pub Date : 1999-12-01 DOI: 10.1093/ortho/26.4.285

B M Bourke, W P Rock

{"title":"Factors affecting the shear bond strength of orthodontic brackets to porcelain.","authors":"B M Bourke, W P Rock","doi":"10.1093/ortho/26.4.285","DOIUrl":"https://doi.org/10.1093/ortho/26.4.285","url":null,"abstract":"The aim of this investigation was to establish a regime for orthodontic bonding to feldspathic porcelain, which ensures adequate bond strength (6-8 MPa) with minimal damage on debond and consisted of an ex vivo investigation measuring the effects of porcelain surface preparation and thermocycling on shear bond strength of orthodontic brackets. One-hundred-and-twenty feldspathic porcelain bonded crown surfaces were divided into 12 equally-sized groups to assess the effects of: (1) glaze removal, (2) application of hydrofluoric acid, phosphoric acid, or omission of acid treatment, and (3) silane priming upon the bond strength of premolar brackets bonded with Right-on (TM) composite resin adhesive. Specimens were subjected to thermocycling and then to shear debonding forces on an Instron machine. Removal of the porcelain glaze, or use of hydrofluoric acid, prior to bonding were found to be unnecessary to secure the target bond strength. Hydrofluoric acid application was associated with increased porcelain surface damage. Thermocycling caused a significant reduction in shear bond strength to porcelain (P < 0*001). The best regime for orthodontic bonding to feldspathic porcelain was to apply phosphoric acid for 60 seconds, and prime with silane prior to bonding. Usually the porcelain surfaces could be repolished. Refereed Paper","PeriodicalId":75621,"journal":{"name":"British journal of orthodontics","volume":"26 4","pages":"285-90"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/ortho/26.4.285","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21449419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0