World journal of orthodontics最新文献_第10页

Effect of 16% carbamide peroxide bleaching agent on the shear bond strength of orthodontic brackets. 16%过氧化脲漂白剂对正畸托槽剪切粘结强度的影响。

World journal of orthodontics Pub Date : 2009-01-01

Ayca Ustdal, Tancan Uysal, Gulsen Akdogan, Gokmen Kurt

{"title":"Effect of 16% carbamide peroxide bleaching agent on the shear bond strength of orthodontic brackets.","authors":"Ayca Ustdal, Tancan Uysal, Gulsen Akdogan, Gokmen Kurt","doi":"","DOIUrl":"","url":null,"abstract":"Objective: To determine the effect of 16% carbamide peroxide on the shear bond strength of metal brackets bonded to premolars either immediately or 30 days after bleaching and to evaluate the bond-failure sites.Material and method: Sixty freshly extracted human premolars were randomly divided into three groups, each containing 20 teeth. Specimens in group A (control) were not bleached (etched only with 37% phosphoric acid) before bonding. The teeth in the other two groups were first bleached with 16% carbamide peroxide according to the manufacturer's recommendation. The teeth in group B were bonded immediately, while the teeth in group C were stored in artificial saliva for 30 days prior to bonding. Shear bond strength was measured and recorded in MPa. Adhesive remnant index (ARI) scores were determined after the brackets failed. Data were analyzed with analysis of variance (ANOVA) and the chi-square test.Results: Group A showed higher shear bond strength values than groups B and C, but the differences among the three groups were not significant (P=.053). Moreover, no significant differences in ARI were found.Conclusion: After bleaching with 16% carbamide peroxide, there is a slight, insignificant decrease in shear bond strength. The site of bond failure is not significantly affected by bleaching.","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"10 3","pages":"211-5"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28485175","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

Comparison of occlusal balance contacts in patients treated with standard edgewise and preadjusted straight-wire appliances. 使用标准边缘矫正器和预调节直丝矫正器治疗患者的咬合平衡接触比较。

World journal of orthodontics Pub Date : 2009-01-01

Mohammad Sadegh Ahmad Akhoundi, Abolfazl Hashem, Hassan Noroozi

{"title":"Comparison of occlusal balance contacts in patients treated with standard edgewise and preadjusted straight-wire appliances.","authors":"Mohammad Sadegh Ahmad Akhoundi, Abolfazl Hashem, Hassan Noroozi","doi":"","DOIUrl":"","url":null,"abstract":"This study investigated the functional occlusion in two groups of patients treated to a Class I canine and molar relationship by fixed appliance therapy. Group A consisted of 24 patients treated with standard edgewise appliances, whereas the 15 patients in group B were treated with a straight-wire appliance. The occlusal contacts were assessed intraorally with articulating ribbon of 8 microns thick. All procedures and measurements were performed by the same examiner. The results revealed that balancing contacts were significantly more frequent in group A. In both groups, most subjects had balancing contacts between their second molars (P<.05). The prevalence of posterior protrusive contacts in group A was similar to group B. Most of the subjects in group B demonstrated canine guidance on laterotrusion, whereas in group A, the majority exhibited group function (P<.05). Mutually protected occlusion was present in an overwhelming percentage of group B, as compared to no patient in group A (P<.05). Patients treated with edgewise appliances did not exhibit ideal functional occlusal relationships, whereas most individuals after straight-wire appliance therapy had a mutually protected (ideal) occlusion.","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"10 3","pages":"216-9"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28485176","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

The importance of the facial profile in orthodontic diagnosis and treatment planning: a patient report. 面部轮廓在正畸诊断和治疗计划中的重要性:一份患者报告。

World journal of orthodontics Pub Date : 2009-01-01

Danilo Furquim Siqueira, Marinês Vieira da Silva Sousa, Paulo Eduardo Guedes Carvalho, Karyna Martins do Valle-Corotti

引用次数: 0

Dental maturation in patients with unilateral posterior crossbite. 单侧后牙合患者的牙齿成熟。

World journal of orthodontics Pub Date : 2009-01-01

Tancan Uysal, Ahmet Yagci, Sabri Ilhan Ramoglu

{"title":"Dental maturation in patients with unilateral posterior crossbite.","authors":"Tancan Uysal, Ahmet Yagci, Sabri Ilhan Ramoglu","doi":"","DOIUrl":"","url":null,"abstract":"Aim: To investigate whether there is a difference in dental maturation between patients with a skeletal unilateral crossbite and a control sample (individuals with an Angle Class I and no crossbite) and to compare the dental maturation on the right and left posterior segments in both samples.Materials and methods: The sample consisted of 101 Turkish individuals (53 boys and 48 girls, 8 to 13 years of age, mean age 10.90 ± 1.62 years). These subjects were divided into two groups: unilateral posterior crossbite (23 boys and 28 girls, mean age 10.87 ± 2.01 years) and control (25 boys and 25 girls, mean age 10.93 ± 1.14 years). Each subject's dental age (according to Demirjian's dental maturity score) was determined with an orthopantomogram. A difference of 6 months at a significance level of P<.05 was considered clinically significant, so the power of the statistical test was 85%.Results: No sexual dimorphism was detected for the chronological or dental age in either group. In both groups, the dental ages determined from Demirjian and Goldstein's tables were more advanced than the chronological ages. Dental age did not differ significantly between sides. Subjects with a posterior crossbite had a tendency for a delayed dental maturation compared to the control individuals. A difference of about 1 month was observed between the right and left sides in the crossbite and control groups.Conclusion: The difference in dental age between the crossbite and control groups was big enough to be clinically relevant. No significant side differences in either group were detected.","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"10 4","pages":"383-8"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28645398","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 participates in the Graduate Orthodontic Residents Program to encourage membership among orthodontic residents. WFO参与研究生正畸住院医师计划，以鼓励正畸住院医师成为会员。

World journal of orthodontics Pub Date : 2009-01-01

引用次数: 0

Open-bite treatment utilizing clear removable appliances with intermaxillary and intramaxillary elastics. 开咬治疗利用透明可移动器具与上颌间和上颌内弹性。

World journal of orthodontics Pub Date : 2009-01-01

Jae Hyun Park, Tae Weon Kim

引用次数: 0

A new sagittal dysplasia indicator: the YEN angle. 矢状位发育不良的新指标:YEN角。

World journal of orthodontics Pub Date : 2009-01-01

Praveen Kumar Neela, Rohan Mascarenhas, Akhter Husain

{"title":"A new sagittal dysplasia indicator: the YEN angle.","authors":"Praveen Kumar Neela, Rohan Mascarenhas, Akhter Husain","doi":"","DOIUrl":"","url":null,"abstract":"Aim: To develop a new cephalometric measurement to evaluate the sagittal relationship between the maxilla and mandible.Material and methods: Seventy-five pretreatment lateral cephalograms (25 each of Class I, II, and III) were subdivided based on ANB, Wits appraisal, and Beta angle into skeletal Class I, II, and III. The same cephalograms were again classified into skeletal Class I, II, and III based purely on Beta angle. The new measurement is based on the landmarks S, M (midpoint of the anterior maxilla), and G (center at the bottom of the symphysis), which form the YEN angle measured at M.Results: The mean and standard deviation for the YEN angle were calculated in all three skeletal groups. After using one-way analysis of variance (ANOVA) and Newman Keuls test, receiver-operating characteristic curves were obtained for the YEN angle in both types of classifications. The results showed that a patient with a YEN angle from 117 to 123 degrees could be considered to have a Class I skeletal relationship.Conclusions: The YEN angle was developed to assess more reliably the sagittal relationship between both jaws. Subjects with a YEN angle between 117 and 123 degrees have a skeletal Class I pattern. With an angle less than 117 degrees, patients are considered to have a skeletal Class II relationship, and with an angle greater than 123 degrees, patients have a skeletal Class III.","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"10 2","pages":"147-51"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28289717","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

Dental and alveolar arch asymmetries in normal occlusion and Class II Division 1 and Class II subdivision malocclusions. 正常咬合和II类1分和II类再分错的牙槽弓不对称。

World journal of orthodontics Pub Date : 2009-01-01

Tancan Uysal, Gokmen Kurt, Sabri Ilhan Ramoglu

{"title":"Dental and alveolar arch asymmetries in normal occlusion and Class II Division 1 and Class II subdivision malocclusions.","authors":"Tancan Uysal, Gokmen Kurt, Sabri Ilhan Ramoglu","doi":"","DOIUrl":"","url":null,"abstract":"Aim: To compare the degree of intra- and interarch dentoalveolar asymmetry among patients with a normal occlusion, Class II Division 1 malocclusion, and Class II subdivision malocclusion.Methods: The sample comprised dental casts of 150 (72 males [ages 22. 1 +/- 3.11 and 78 females [ages 21.1 +/- 2.1]) normal occlusion subjects, 106 (45 males [ages 17.8 +/- 1.8] and 61 females [ages 16.5 +/- 2.91) Class II Division 1 patients, and 40 (18 males [ages 15.8 +/- 2.8] and 22 females [ages 15.2 +/- 3.3]) Class II subdivision malocclusions. Maxillary and mandibular reference lines were constructed and used for the intraarch asymmetry measurements. Thirty-six width measurements were performed on the dental casts of each subject. Analysis of variance (ANOVA) was used for comparisons of the groups, and Pearson's correlation coefficients were computed to determine the interarch associations.Results: No statistically significant intra-arch asymmetry was found for maxillary and mandibular dental arch and alveolar width in any of the three groups. All variables were larger on the right side in the normal occlusion subjects. Further, the left side maxillary dental and alveolar arch width measurements were larger in the Class II Division 1 group. None of these differences, however, were statistically significant. In the Class II subdivision group, only the Class II sides' mandibular dental arch measurements were larger (P < .05). Maxillary and mandibular total dental arch and alveolar width dimensions differed among the groups (P < .001). Except for maxillary and mandibular canine alveolar width, opposing interarch dental and alveolar landmarks were significantly correlated with the transverse dimensions.Conclusion: Although some landmarks in the current study showed statistically significant and insignificant differences, the mean arithmetic differences were small, inconsistent, and not likely clinically important.","PeriodicalId":87213,"journal":{"name":"World journal of orthodontics","volume":"10 1","pages":"7-15"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28127797","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

Mia-assisted orthodontic treatment for dental malocclusion secondary to periodontal disease. mia辅助正畸治疗继发于牙周病的牙错。

World journal of orthodontics Pub Date : 2009-01-01

Yi-miao Feng, Bing Fang, Yun hui Xia, Rong Shu, Mark Guenther Hans

引用次数: 0

Treatment of a patient with a severe Class III and open bite: a case report. 严重III类开放性咬伤患者的治疗:1例报告。

World journal of orthodontics Pub Date : 2009-01-01

Gilman Yücel, Gülnaz Marşan, Nil Cura, Emre Hocaoğlu

引用次数: 0