Orthodontics : the art and practice of dentofacial enhancement最新文献

{"title":"Mini-implant loosening: 3D analysis using the finite element method.","authors":"Allahyar Geramy,&nbsp;Jean Marc Retrouvey,&nbsp;Reza Jelodar,&nbsp;Hasan Salehi","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Aim: </strong>Mini-implants are a relatively new device for absolute anchorage control in orthodontics. Their failure due to loosening is a multifactorial problem. Improper positioning of mini-implants with different diameters is evaluated in this study via the finite element method.</p><p><strong>Methods: </strong>Twelve 3D finite element models of a mandibular posterior segment were designed and included the first molar, a mini-implant, the periodontal ligament, and spongy and cortical bone. They were similar except for the mini-implant position and diameter (1.3, 1.6, and 2.2 mm). A vertical force of 300 N was applied to the occlusal molar surface. The von Mises stress and energy produced by the applied occlusal forces were assessed in the mini-implant and bone.</p><p><strong>Results: </strong>The stress findings were between 15.284 and 359.77 MPa for the mini-implants based on their diameters and locations. The mini-implant energy findings were between 0.00084 and 0.258 mJ. These ranges for bone stress and energy changes were 17.611 and 129.45 MPa and 0.296 and 1.575 mJ, respectively.</p><p><strong>Conclusion: </strong>A decrease in the distance between the mini-implant and tooth root has a direct effect on different parameters to explain mini-implant loosening.</p>","PeriodicalId":89450,"journal":{"name":"Orthodontics : the art and practice of dentofacial enhancement","volume":"13 1","pages":"e51-7"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30601785","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}

{"title":"The association of oral health-related quality of life and self-perceived esthetic impairment with orthodontic treatment seeking.","authors":"Sepideh Torkan,&nbsp;Somayeh Heidari,&nbsp;Hamidreza Pakshir","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Aim: </strong>To assess oral health-related quality of life (OHRQOL) and self-perceived esthetic impairment in patients seeking orthodontic treatment and to compare them with peers in the same age group who had never undergone orthodontic treatment. A correlation between OHRQOL and lower self-perceived esthetic impairment was also searched for.</p><p><strong>Methods: </strong>The sample comprised 209 individuals (12 to 20 years of age), of whom 110 were about to receive or had already started orthodontic treatment at Shiraz Dental School, Shiraz, Iran, (orthodontic group) and 99 participants who had never received orthodontic treatment (control group). OHRQOL was recorded with the validated Persian version of the short form of the Oral Health Impact Profile. The aesthetic component (AC) of the Index of Orthodontic Treatment Need (IOTN) instrument was used to record examiner and self-perceived esthetic impairment in both groups.</p><p><strong>Results: </strong>The Mann-Whitney test revealed that the orthodontic group had significantly worse OHRQOL than the control group (P = .005). The former group also had significantly higher self-perceived IOTN AC scores (P < .00). The weighted Kappa test was used to report the agreement between the examiner and self-perceived esthetic impairment. No significant intersex differences were found in either group. The Spearman correlation coefficient showed a significant correlation between higher IOTN AC scores and worse OHRQOL (P = .007) in the control group. No such correlation was found in the treatment group.</p><p><strong>Conclusion: </strong>Individuals who sought orthodontic treatment had higher self-perceived IOTN AC scores and worse OHRQOL than the control group.</p>","PeriodicalId":89450,"journal":{"name":"Orthodontics : the art and practice of dentofacial enhancement","volume":"13 1","pages":"226-33"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30601907","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}

{"title":"Association between study design and citation counts of articles published in the American Journal of Orthodontics and Dentofacial Orthopedics and Angle Orthodontist.","authors":"Veerasathpurush Allareddy,&nbsp;Min Kyeong Lee,&nbsp;Andrea Shah,&nbsp;Satheesh Elangovan,&nbsp;Chin-Yu Lin","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Objective: </strong>The scientific community views meta-analyses and systematic reviews, in addition to well-designed randomized controlled clinical trials, as the highest echelon in the continuum of hierarchy of evidence. The objective of this study was to examine the association between different study designs and citation counts of articles published in the American Journal of Orthodontics and Dentofacial Orthopedics and Angle Orthodontist.</p><p><strong>Methods: </strong>All articles, excluding editorial comments, letters to the editor, commentaries, and special articles, that were published in the American Journal of Orthodontics and Dentofacial Orthopedics and Angle Orthodontist during the years 2004 and 2005 were examined in this study. The number of times an article was cited in the first 24 months after its publication was computed. The PubMed database was used to index the study design of the articles. The association between study design and citation counts was examined using the Kruskal-Wallis test. A multivariable negative binomial regression model was used to examine the association between citation count and study design along with several other confounding variables.</p><p><strong>Results: </strong>A total of 624 articles were selected for analysis. Of these, there were 25 meta-analyses or review articles, 42 randomized clinical trials, 59 clinical trials, 48 animal studies, 64 case reports, and 386 quasiexperimental/miscellaneous study designs. The mean ± SD citation count was 1.04 ± 1.46. Nearly half of the articles (n = 311) were not cited even once during the observation period. Case reports were cited less frequently than meta-analyses or reviews (incident risk ratio, 0.37; 95% confidence interval, 0.19 to 0.72; P = .003), even after adjusting for other independent variables.</p><p><strong>Conclusion: </strong>Among various study designs, meta-analyses and review articles are more likely to be cited in the first 24 months after publication. This study demonstrates the importance of publishing more meta-analyses and review articles for quicker dissemination of research findings.</p>","PeriodicalId":89450,"journal":{"name":"Orthodontics : the art and practice of dentofacial enhancement","volume":"13 1","pages":"184-91"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30602024","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}

{"title":"Prevalence and distribution of dental anomalies in orthodontic patients.","authors":"Mona A Montasser,&nbsp;Mahasen Taha","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Aim: </strong>To study the prevalence and distribution of dental anomalies in a sample of orthodontic patients.</p><p><strong>Methods: </strong>The dental casts, intraoral photographs, and lateral panoramic and cephalometric radiographs of 509 Egyptian orthodontic patients were studied. Patients were examined for dental anomalies in number, size, shape, position, and structure. The prevalence of each dental anomaly was calculated and compared between sexes.</p><p><strong>Results: </strong>Of the total study sample, 32.6% of the patients had at least one dental anomaly other than agenesis of third molars; 32.1% of females and 33.5% of males had at least one dental anomaly other than agenesis of third molars. The most commonly detected dental anomalies were impaction (12.8%) and ectopic eruption (10.8%). The total prevalence of hypodontia (excluding third molars) and hyperdontia was 2.4% and 2.8%, respectively, with similiar distributions in females and males. Gemination and accessory roots were reported in this study; each of these anomalies was detected in 0.2% of patients.</p><p><strong>Conclusion: </strong>In addition to genetic and racial factors, environmental factors could have more important influence on the prevalence of dental anomalies in every population. Impaction, ectopic eruption, hyperdontia, hypodontia, and microdontia were the most common dental anomalies, while fusion and dentinogenesis imperfecta were absent.</p>","PeriodicalId":89450,"journal":{"name":"Orthodontics : the art and practice of dentofacial enhancement","volume":"13 1","pages":"52-9"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30602157","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}

{"title":"Orthodontic possibilities on ceramic surfaces with 10-methacryloyloxydecyle dihydrogen phosphate.","authors":"Shobha Sundareswaran,&nbsp;Ustad Usman","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Aim: </strong>To evaluate the shear bond strength of orthodontic brackets bonded to porcelain surfaces using a recently introduced adhesive containing 10-methacryloyloxydecyle dihydrogen phosphate (10-MDP) (Panavia F2) and comparing it with two other bonding systems, Transbond XT and Fuji Ortho LC.</p><p><strong>Methods: </strong>Three groups, each consisting of 20 porcelain premolars, were bonded with metal orthodontic brackets (0.022 MBT) using 10-MDP (group I), Transbond XT (group II), and Fuji Ortho LC (group III). All ceramic surfaces were etched with 9.6% hydrofluoric acid followed by application of a silane coupling agent prior to bonding. All specimens were stored in artificial saliva at 37°C for 24 hours and thermocycled between 5°C and 55°C for 500 cycles before debonding with an Instron universal testing machine. The shear bond strength, adhesive remnant index, and sites of bond failure were recorded. Differences between the groups were statistically analyzed using ANOVA, Tukey HSD, and Pearson chi-square tests.</p><p><strong>Results: </strong>Group I (12.52 ± 3.64 MPa) had the highest shear bond strength as compared with group II (9.45 ± 4.58 MPa) and group III (9.53 ± 2.55 MPa) (P < .05). The ARI scores of all the three groups showed no significant differences among the groups. However, porcelain damage was visible in some samples in all groups.</p><p><strong>Conclusion: </strong>Group I samples bonded with 10-MDP exhibited the highest mean shear bond strength, but the risk of porcelain damage necessitates caution.</p>","PeriodicalId":89450,"journal":{"name":"Orthodontics : the art and practice of dentofacial enhancement","volume":"13 1","pages":"e29-36"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30602378","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}

{"title":"A CBCT comparison of anterior root resorption in SureSmile and conventional edgewise treatments.","authors":"Neepa Patel,&nbsp;G Frans Currier,&nbsp;Onur Kadioglu,&nbsp;J Peter Kierl,&nbsp;Valerie J Skaggs","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Aim: </strong>To utilize cone beam computed tomography (CBCT) to analyze the amount of linear root resorption that occurs in maxillary and mandibular permanent incisors during orthodontic treatment when comparing the SureSmile technique with conventional edgewise treatment. In addition, patient and treatment factors that may be correlated with root resorption were studied.</p><p><strong>Methods: </strong>The records of 28 patients (14 SureSmile and 14 edgewise) treated in an orthodontic office were used for this study. CBCTs were taken of all patients prior to (T1) and after completion of orthodontic treatment (T2). Total tooth length of the permanent incisors were measured on the CBCTs at T1 and T2. Root resorption was calculated for each tooth by subtracting T1 from T2.</p><p><strong>Results: </strong>No statistically significant differences in mean root resorption (MRR) were found for the permanent incisors when comparing SureSmile patients with conventional edgewise patients. The MRR for each tooth was found to be less than 1 mm when using either treatment modality. Subjects with increased resorption included Class II malocclusion, severe overjet, and treatment time greater than or equal to 25 months. Sex and the use of Class II elastics showed no significant differences in mean root resorption.</p><p><strong>Conclusion: </strong>No differences were found in root resorption of the permanent incisors when comparing SureSmile and edgewise treatments.</p>","PeriodicalId":89450,"journal":{"name":"Orthodontics : the art and practice of dentofacial enhancement","volume":"13 1","pages":"100-9"},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30603667","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}

{"title":"Orthodontic management of an originally surgically planned treatment of an open bite: a case report.","authors":"Chadi Kassir,&nbsp;Samar Bou Assi","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The treatment of open bite malocclusion is generally considered a challenge due to its multifactorial etiology. Many treatment modalities to correct open bites, including orthognathic surgery and dental compensation, have been proposed. Dental compensation (intruding the posterior teeth and uprighting and extruding the anterior teeth with elastics) is a treatment option for borderline patients and those who are reluctant to undergo surgery. This report documents the treatment of a patient with a severe skeletal open bite malocclusion whose treatment plan originally included fixed appliance therapy as well as orthognathic surgery. He was subsequently treated with only fixed appliances. The patient, a male 17 years, 7 months of age, presented with a Class II, Division 1 malocclusion, 5 mm anterior open bite, and an increased anterior facial height. He was treated with extraction of the maxillary and mandibular premolars, full fixed appliances, and anterior vertical elastics. After 30 months of active treatment, a Class I occlusion with improved overjet and overbite was achieved.</p>","PeriodicalId":89450,"journal":{"name":"Orthodontics : the art and practice of dentofacial enhancement","volume":"12 1","pages":"60-9"},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30031794","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}

{"title":"Pre-eruptive coronal resorption of a maxillary canine: a case report.","authors":"Omar Yaqoob,&nbsp;Andrew T DiBiase,&nbsp;Riccarda Kane,&nbsp;Padhraig S Fleming","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>This paper is the first to highlight a case of pre-eruptive coronal resorption of a maxillary canine in a patient undergoing extraction-based fixed appliance therapy. The etiology, clinical implications, and management of pre-eruptive coronal resorption are discussed.</p>","PeriodicalId":89450,"journal":{"name":"Orthodontics : the art and practice of dentofacial enhancement","volume":"12 2","pages":"148-51"},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30155241","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}

{"title":"Socket sclerosis: a rare complication obstructing orthodontic tooth movement.","authors":"Navneet Arora Khurana,&nbsp;Gaurav Khurana,&nbsp;Nakul Uppal","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Socket sclerosis is usually asymptomatic and does not require any treatment. The only potential complication arises during orthodontic treatment, wherein a sclerosed socket of the premolars may be an obstacle in closing spaces by movement of teeth through the extraction space. This article demonstrates the problems encountered during the orthodontic treatment of a 20-year-old woman with socket sclerosis and the treatment strategy employed to overcome the same.</p>","PeriodicalId":89450,"journal":{"name":"Orthodontics : the art and practice of dentofacial enhancement","volume":"12 2","pages":"e1-5"},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30156825","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}

{"title":"Assessment of the reliability of root angulations on panoramic radiographs.","authors":"Kartik D Dholakia,&nbsp;Shweta R Bhat","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Aim: </strong>To check the reliability of panoramic radiographs in assessing mesiodistal angulations while considering the true long axes of teeth in relation to a horizontal reference archwire.</p><p><strong>Method: </strong>A clear anatomical typodont with removable teeth was used with 0.8-mm chromium steel balls glued over the incisal/occlusal and apical/furcal portions of teeth to serve as reference markers for representing true long axes of teeth on radiographs and photographs. A photograph of each tooth was taken with a particular technique to serve as a medium through which to measure true mesiodistal angulations of teeth.</p><p><strong>Results: </strong>Only overall maxillary teeth angulations significantly correlated to true mesiodistal angulations. Radiographic relationship of the long axes of adjacent teeth (convergence or divergence) in the mandibular as well as the maxillary arch did not show any significant correlation to true degree of convergence or divergence and displayed a tendency to accentuate the maxillary canine to premolar divergence and mandibular lateral incisor to canine convergence.</p><p><strong>Conclusion: </strong>Panoramic radiographs provide a poor representation of the mesiodistal angulations of teeth and require cautious use with clinical judgment and adjunctive procedures to ascertain root angulations.</p>","PeriodicalId":89450,"journal":{"name":"Orthodontics : the art and practice of dentofacial enhancement","volume":"12 2","pages":"96-107"},"PeriodicalIF":0.0,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"30156827","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}