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The mousetrap. 捕鼠器。
World journal of orthodontics Pub Date : 2020-12-31 DOI: 10.1515/9780822384595-014
W. Hohlt, R. Silberstein
{"title":"The mousetrap.","authors":"W. Hohlt, R. Silberstein","doi":"10.1515/9780822384595-014","DOIUrl":"https://doi.org/10.1515/9780822384595-014","url":null,"abstract":"This paper demonstrates an unorthodox method to quickly erupt palatally impacted canines based on sound biomechanical principles. The unwinding of a stainless steel round archwire produces the required occlusobuccal force. Due to its snap-back release, it looks like a trap, which is why it was dubbed mousetrap.","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"10 3 1","pages":"257-60"},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45145599","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
Maxillary and mandibular base size in ancient skulls and of modern humans from Opi, Abruzzi, Italy: a cross-sectional study. 意大利阿布鲁齐奥皮地区古代头骨和现代人的上颌和下颌基底尺寸:一项横断面研究。
World journal of orthodontics Pub Date : 2010-01-01
Felice Festa, Luigi Capasso, Ruggero D'Anastasio, Guiseppe Anastasi, Mario Festa, Sergio Caputi, Simona Tecco
{"title":"Maxillary and mandibular base size in ancient skulls and of modern humans from Opi, Abruzzi, Italy: a cross-sectional study.","authors":"Felice Festa,&nbsp;Luigi Capasso,&nbsp;Ruggero D'Anastasio,&nbsp;Guiseppe Anastasi,&nbsp;Mario Festa,&nbsp;Sergio Caputi,&nbsp;Simona Tecco","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Aim: </strong>The size and shape of the jaws are related to occlusion and masticatory muscle function. Consequently, teeth and muscles are considered the functional matrix for the two jaws. Existing studies did not focus on the relationship between maxillary and mandibular base but on just their absolute dimensions. As the relationship between the two is of interest to orthodontists, the aim of this study was to calculate the maxillary-mandibular ratio (m-m ratio) in individuals from Central Italy and to compare it to that of ancient skulls from the same geographic area.</p><p><strong>Methods: </strong>Forty individuals from Opi, a small, isolated mountain village in Central Italy, and 40 ancient skulls from the same region were the sample of this study. The lengths of the maxillary and mandibular base were assessed on lateral cephalograms, the m-m ratio was calculated, and the measurements between the groups were compared.</p><p><strong>Results: </strong>Due to a significantly shorter maxillary base in the modern human sample, the m-m ratio was significantly lower in these subjects.</p><p><strong>Conclusion: </strong>This finding supports the hypothesis that growth of the skull is strongly modulated by the functional matrix, within which a morphologic unit develops.</p>","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"11 1","pages":"e1-4"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28758330","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
WFO Executive Committee elects Dr Allan Thom as vice-president in March. WFO执行委员会于3月选举Allan Thom博士为副主席。
World journal of orthodontics Pub Date : 2010-01-01
{"title":"WFO Executive Committee elects Dr Allan Thom as vice-president in March.","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"11 2","pages":"191"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30032822","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
WFO Council convenes, elects new Executive Committee. 世界气象组织理事会召开会议，选举新的执行委员会。
World journal of orthodontics Pub Date : 2010-01-01
{"title":"WFO Council convenes, elects new Executive Committee.","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"11 2","pages":"192-3"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30032823","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
Symposium on Orthodontic Certifying Boards ignites interest in board certification. 正畸认证委员会研讨会激发对委员会认证的兴趣。
World journal of orthodontics Pub Date : 2010-01-01
{"title":"Symposium on Orthodontic Certifying Boards ignites interest in board certification.","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"11 2","pages":"194-5"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30032824","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
Interdisciplinary treatment of a patient with amelogenesis imperfecta, a skeletal Class III relationship, and an anterior open bite. 1例骨性发育不全，骨骼III类关系，前牙开咬患者的跨学科治疗。
World journal of orthodontics Pub Date : 2010-01-01
Gülnaz Marşan, Irem Sakarya Aksu, Hanefi Kurt, Samet Vasfi Kuvat, Nil Cura
{"title":"Interdisciplinary treatment of a patient with amelogenesis imperfecta, a skeletal Class III relationship, and an anterior open bite.","authors":"Gülnaz Marşan,&nbsp;Irem Sakarya Aksu,&nbsp;Hanefi Kurt,&nbsp;Samet Vasfi Kuvat,&nbsp;Nil Cura","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>An adult woman with amelogenesis imperfecta, a skeletal Class III relationship, long face syndrome, and a severe anterior open bite received interdisciplinary treatment (orthodontics, orthognathic surgery, and prosthodontics). Presurgical orthodontic treatment was followed by a maxillary posterior impaction with anterior advancement and a mandibular setback. After surgery, the patient received ceramic crowns. Function and esthetics were successfully re-established.</p>","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"11 3","pages":"284-90"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29309769","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
A clinical, MRI, and EMG analysis comparing the efficacy of twin blocks and flat occlusal splints in the management of disc displacements with reduction. 临床，MRI和肌电图分析比较双块和平面咬合夹板治疗椎间盘移位复位的疗效。
World journal of orthodontics Pub Date : 2010-01-01
Neeraj S Rohida, Wasundhara Bhad
{"title":"A clinical, MRI, and EMG analysis comparing the efficacy of twin blocks and flat occlusal splints in the management of disc displacements with reduction.","authors":"Neeraj S Rohida,&nbsp;Wasundhara Bhad","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Internal derangement of the temporomandibular joint (TMJ) is characterized by an abnormal disc-condyle relationship. Of all the various treatment modalities used in the management of disc displacements, flat occlusal and anterior repositioning splints are the most commonly used. Myofunctional appliances (such as bite-jumping appliances) are also advocated to treat anterior disc displacements. The present study compares the efficacy of twin blocks with conventional flat occlusal splints in patients with anterior disc displacement with reduction using clinical examination, MRI, and EMG. The sample consisted of 20 subjects between 12 and 20 years of age, who were randomly divided into two groups of 10 patients each: Group 1 was treated with twin blocks, while group 2 was treated using maxillary flat occlusal splints. The twin block is more effective in relieving joint pain, diminishing joint dysfunction, reducing joint clicking, and eliminating muscle tenderness in patients with anterior disc displacement with reduction as compared to the occlusal splint.</p>","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"11 3","pages":"236-44"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29309857","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
A comparison of force decay: elastic chain or tie-back method? 力衰减的比较:弹性链法还是回扎法?
World journal of orthodontics Pub Date : 2010-01-01
Morteza Oshagh, Shabnam Ajami
{"title":"A comparison of force decay: elastic chain or tie-back method?","authors":"Morteza Oshagh,&nbsp;Shabnam Ajami","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Aim: </strong>To evaluate the amount of initial force and to compare the amount of force decay between the elastomeric chain and tie-back method over a period of time.</p><p><strong>Methods: </strong>Twenty five-unit elastomeric chains (15 mm) stretched 100%, and twenty elastic modules in tie-back method stretched twice their original diameter were held in place by a series of pins 30-mm apart in acrylic blocks. The blocks were stored in 37 °C distilled water. The force of all samples was measured at baseline, 24 and 48 hours, and once a week thereafter for 4 weeks with a force gauge. The groups were tested with a multivariate analysis of repeated measurement at the 95% confidence level.</p><p><strong>Results: </strong>The tie-back method with mean force of 577.50 grams (standard deviation [SD] 28.63) had a lower initial force than the elastomeric chain with mean force of 650.00 grams (SD 34.47). The elastomeric chain showed a substantial force decay of 355.50 grams (SD 53.2) at 24 hours, but the force decay in the tie-back method was less (mean 154 grams, SD 56.50). The force decay of the elastomeric chain and tie-back at 48 hours were 446.50 grams (SD 35.4) and 209 grams (SD 57.1), respectively. The difference between the force decay of the two groups at both 24 and 48 hours was statistically significant (P<.05).</p><p><strong>Conclusion: </strong>Using the tie-back method of space closure, which has more appropriate initial force and slower force decay, may have a clinical value, approaching a more light and continued force. However, more studies are required to test these findings in vivo.</p>","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"11 4","pages":"e45-51"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29813815","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
Applicability of Bolton tooth-size ratios in racial groups. 博尔顿牙齿大小比例在种族群体中的适用性。
World journal of orthodontics Pub Date : 2010-01-01
Thais Maria Freire Fernandes, Guilherme Janson, Arnaldo Pinzan, Renata Sathler, Lívia Maria Andrade de Freitas, Marcos Roberto de Freitas
{"title":"Applicability of Bolton tooth-size ratios in racial groups.","authors":"Thais Maria Freire Fernandes,&nbsp;Guilherme Janson,&nbsp;Arnaldo Pinzan,&nbsp;Renata Sathler,&nbsp;Lívia Maria Andrade de Freitas,&nbsp;Marcos Roberto de Freitas","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Aim: </strong>To determine whether there is sexual dimorphism regarding Bolton ratios within four ethnic groups and to compare them against Bolton standards.</p><p><strong>Methods: </strong>The sample consisted of 140 dental study casts of untreated normal occlusion subjects, derived from four racial groups: black, white, Afro-Mediterranean, and Japanese. Anterior and overall Bolton ratios were calculated for each cast. The Kolmogorov-Smirnov test, t test, and one-way ANOVA were used.</p><p><strong>Results: </strong>No statistically significant sexual dimorphism in anterior or total tooth-size ratios were found within any group. Only the Japanese anterior ratio (75.09) was statistically less than the Bolton standard (77.2; P<.001).</p><p><strong>Conclusion: </strong>The Bolton ratio can be applied to the investigated ethnic groups except for the anterior ratio in Japanese patients.</p>","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"11 4","pages":"e57-62"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"29814299","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
Prevalence of signs and symptoms of temporomandibular disorders in children and adolescents with and without crossbites. 儿童和青少年伴和不伴交叉咬伤的颞下颌紊乱症状和体征的患病率
World journal of orthodontics Pub Date : 2010-01-01
Simona Tecco, Felice Festa
{"title":"Prevalence of signs and symptoms of temporomandibular disorders in children and adolescents with and without crossbites.","authors":"Simona Tecco,&nbsp;Felice Festa","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>This study investigated the prevalence of signs and symptoms of temporomandibular disorders (TMD) in 1,134 orthodontically untreated children and adolescents (593 boys, 541 girls; age range 5 to 15 years) with and without crossbites. The sample with crossbites was further grouped according to the type (anterior, posterior, unilateral, or bilateral). The TMD symptoms bruxism (obvious active attrition/myalgia), joint sounds (clicking/crepitation), deviation during opening, reduced functional movements (maximum opening <40 mm), and myopain (originating in the masticatory muscles/related to masticatory functions) were evaluated based on the standardized RDC/TMD protocol (Research Diagnostic Criteria for Temporomandibular Disorders) and compared among the various groups. Girls had a significantly higher prevalence of myopain than boys (x(2)=3.882, P<.05). Furthermore, individuals with posterior unilateral crossbites showed a significantly higher prevalence of TMD symptoms (x(2)=33.877, P<.001) and reduced functional movements (x2 = 10.800, P<.05) than any other group. In conclusion, sex and type of crossbite play a role in the prevalence of TMD signs and symptoms.</p>","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"11 1","pages":"37-42"},"PeriodicalIF":0.0,"publicationDate":"2010-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28758336","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
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