British journal of orthodontics最新文献_第10页

The ectopic maxillary canine: a review. 异位上颌犬:综述。

British journal of orthodontics Pub Date : 1998-08-01 DOI: 10.1093/ortho/25.3.209

P F McSherry

引用次数: 99

Re: UK undergraduate education. 回复:英国本科教育。

British journal of orthodontics Pub Date : 1998-08-01 DOI: 10.1093/ortho/25.3.235b

C D Stephens, I S Hathorn

引用次数: 0

An investigation into the behavioural characteristics of orthodontic elastomeric modules. 正畸弹性模组行为特性的研究。

British journal of orthodontics Pub Date : 1998-08-01 DOI: 10.1093/ortho/25.3.197

P A Dowling, W B Jones, L Lagerstrom, J A Sandham

{"title":"An investigation into the behavioural characteristics of orthodontic elastomeric modules.","authors":"P A Dowling, W B Jones, L Lagerstrom, J A Sandham","doi":"10.1093/ortho/25.3.197","DOIUrl":"https://doi.org/10.1093/ortho/25.3.197","url":null,"abstract":"The object of the study was to investigate the behavioural characteristics of orthodontic elastomeric modules with regard to their effect on frictional resistance and their failure load forces, and involved the use of an experimental laboratory-based study. Six cohorts were assembled employing five types of module and two bracket types. Straight lengths of 0.018 x 0.025-inch stainless steel were pulled through the ligated brackets and frictional resistance was measured using an Instron universal testing machine. Recordings were repeated over a 4-week period, during which time the cohorts were placed in a simulated oral environment. Failure load forces of new and used modules were also recorded, and frictional resistance and failure load forces. Analysis of variance revealed that the Minitwin cohort exhibited significantly higher frictional resistance and that the clear modules demonstrated the lowest levels of friction. Time soaked in a simulated oral environment had a variable effect on frictional resistance. A wide range of failure load forces was seen for the five types of module and all types showed a reduction in failure load force following their soaking in the simulated oral environment. There was variation in performance of the different modules both in friction testing and failure load testing.","PeriodicalId":75621,"journal":{"name":"British journal of orthodontics","volume":"25 3","pages":"197-202"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/ortho/25.3.197","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20712470","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: 59

Bone remodelling. 骨重塑。

British journal of orthodontics Pub Date : 1998-05-01 DOI: 10.1093/ortho/25.2.101

P A Hill

引用次数: 0

The effect of extraction of third molars on late lower incisor crowding: a randomized controlled trial. 第三磨牙拔除对晚期下门牙拥挤的影响:一项随机对照试验。

British journal of orthodontics Pub Date : 1998-05-01 DOI: 10.1093/ortho/25.2.117

N W Harradine, M H Pearson, B Toth

{"title":"The effect of extraction of third molars on late lower incisor crowding: a randomized controlled trial.","authors":"N W Harradine, M H Pearson, B Toth","doi":"10.1093/ortho/25.2.117","DOIUrl":"https://doi.org/10.1093/ortho/25.2.117","url":null,"abstract":"The problem of late mandibular incisor crowding is a well established phenomenon, the cause of which has been the substance of considerable debate over the years. A central issue is the possible role of the third molars though no definitive conclusions have been consistently drawn. This prospective study was designed to investigate the effects of randomly assigned early extraction of third molars on late crowding of the mandibular incisors. One-hundred-and-sixty-four patients entered the study from 1984 following completion of retention after orthodontic treatment. Seventy-seven patients (47%) returned for records up to a mean of 66 months later, and their start and finish study casts were digitized on a reflex microscope to determine Little's index of irregularity, intercanine width and arch length. Forty-four of the patients had been randomized to have third molars removed. There was no evidence of responder bias. Where third molars were extracted the mean increase in lower labial segment irregularity was reduced by 1.1 mm from a mean of 2.1 mm for the group where third molars were retained (P = 0.15, not statistically significant). This difference was also not considered to be clinically significant. The principal conclusion drawn from this randomized prospective study is that the removal of third molars to reduce or prevent late incisor crowding cannot be justified.","PeriodicalId":75621,"journal":{"name":"British journal of orthodontics","volume":"25 2","pages":"117-22"},"PeriodicalIF":0.0,"publicationDate":"1998-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/ortho/25.2.117","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"20587589","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: 139

The William Houston Gold Medal 1996. 1996年威廉·休斯顿金牌。

British journal of orthodontics Pub Date : 1998-05-01 DOI: 10.1093/ortho/25.2.85

R B Lawson

引用次数: 0

Electrothermal bonding: shear bond strength of orthodontic brackets after two weeks. 电热粘结:两周后正畸托槽的剪切粘结强度。

British journal of orthodontics Pub Date : 1998-05-01 DOI: 10.1093/ortho/25.2.123

G J Ward, E Mizrahi, P E Cleaton-Jones

引用次数: 8

"Technological advances, informatics and orthodontics"--a 'voiced' editorial. “技术进步、信息学和正畸学”——一篇“配音”社论。

British journal of orthodontics Pub Date : 1998-05-01 DOI: 10.1093/ortho/25.2.131

M Jones

引用次数: 0

Impression materials. 印象材料。

British journal of orthodontics Pub Date : 1998-05-01 DOI: 10.1093/ortho/25.2.133

B Doubleday

引用次数: 0

Comment on the second case presented in which the impacted upper canines were extracted instead of being exposed. 对第二个病例的评论，其中被影响的上犬齿被取出而不是暴露。

British journal of orthodontics Pub Date : 1998-05-01 DOI: 10.1093/ortho/25.2.142a

T Weinberger

引用次数: 0