American Journal of Orthodontics and Dentofacial Orthopedics最新文献

{"title":"Information for readers","authors":"","doi":"10.1016/S0889-5406(24)00209-9","DOIUrl":"https://doi.org/10.1016/S0889-5406(24)00209-9","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141482051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-dimensional assessment of virtual clear aligner attachment removal: A prospective clinical study","authors":"Jeremy Dock ,&nbsp;Flavio Copello ,&nbsp;Iman Shirmohammadi ,&nbsp;Jose A. Bosio","doi":"10.1016/j.ajodo.2024.02.006","DOIUrl":"10.1016/j.ajodo.2024.02.006","url":null,"abstract":"<div><h3>Introduction</h3><p>In digital dentistry, virtual attachment removal (VAR) optimizes clear aligner therapy by enhancing efficiency for refinements and enabling prefabricated retainer production through the removal of attachments from a digital scan before the clinical removal of clear aligner attachments. This prospective clinical study aimed to evaluate the accuracy of VAR in the maxillary arch.</p></div><div><h3>Methods</h3><p>A total of 110 teeth were analyzed from a sample of 54 maxillary scans from 25 subjects. Models with attachments were virtually debonded using Meshmixer (Autodesk, San Rafael, Calif) and superimposed over the control group in MeshLab. Vector Analysis Module (Canfield Scientific, Fairfield, NJ) was used to calculate and analyze 3-dimensional Euclidean distances on the buccal surfaces between the superimposed models. Statistical analysis was performed using SPSS (version 23.0, IBM, Armonk, NY). The Shapiro-Wilkes (α = 0.05) test determined a nonnormal distribution of results. The Kruskal-Wallis (α = 0.05) was used to determine differences between different tooth types and the number of attachments.</p></div><div><h3>Results</h3><p>The VAR protocol showed no statistical differences in the root mean square between different tooth segments with an overall tendency for inadequate attachment removal. No difference between the groups was found regarding the number of attachments when used as a main factor.</p></div><div><h3>Conclusions</h3><p>The VAR technique is precise enough for the fabrication of retainers from printed dental models in a clinical setting and is not affected by the number of attachments on the tooth.</p></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140766927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"July 2024","authors":"Dr Allen H. Moffitt (CE Editor)","doi":"10.1016/j.ajodo.2024.05.003","DOIUrl":"https://doi.org/10.1016/j.ajodo.2024.05.003","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141480769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparing the accuracy of 3 different liquid crystal display printers for dental model printing","authors":"Ioannis A. Tsolakis ,&nbsp;Ioannis Lyros ,&nbsp;Isidora Christopoulou ,&nbsp;Apostolos I. Tsolakis ,&nbsp;Moschos A. Papadopoulos","doi":"10.1016/j.ajodo.2024.01.017","DOIUrl":"10.1016/j.ajodo.2024.01.017","url":null,"abstract":"<div><h3>Introduction</h3><p>This study aimed to evaluate the accuracy in terms of trueness and precision of 3 different liquid crystal display (LCD) printers with different cost levels.</p></div><div><h3>Methods</h3><p>Three LCD 3-dimensional (3D) printers were categorized into tiers 1-3 on the basis of cost level. The printers’ accuracies were assessed in terms of trueness and precision. For this research, 10 standard tessellation language (STL) reference files were used. For trueness, each STL file was printed once with each 3D printer. For precision, 1 randomly chosen STL file was printed 10 times with each 3D printer. After that, a model scanner was used to scan the models, and STL comparisons were performed using reverse engineering software. For the measurements regarding trueness and precision, the Friedman test was used.</p></div><div><h3>Results</h3><p>There were significant differences among the 3 printers (<em>P</em> &lt;0.05). The trueness and precision error were lower in models printed with a tier-1 printer than in the remaining 3D printers (<em>P</em> &lt;0.05). The tier-2 and -3 printers presented very similar performance.</p></div><div><h3>Conclusions</h3><p>LCD 3D printers can be accurately used in orthodontics for model printing depending on the specific orthodontic use. The cost of a printer is relevant to the results only for the higher expense of the 3D printer in this study.</p></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140793150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The uses of 3-dimensional printing technology in orthodontic offices in North America","authors":"Tarek ElShebiny ,&nbsp;Yahaziel Simon ,&nbsp;Catherine A. Demko ,&nbsp;Juan Martin Palomo","doi":"10.1016/j.ajodo.2024.03.014","DOIUrl":"10.1016/j.ajodo.2024.03.014","url":null,"abstract":"<div><h3>Introduction</h3><p>The purpose of this study was to examine the use of orthodontic 3-dimensional (3D) printing technology in North America and to understand why orthodontists are, or are not, incorporating 3D printing technology in their practices.</p></div><div><h3>Methods</h3><p>A survey questionnaire was delivered on a secure online platform, RedCap (Case Western Reserve University Clinical and Translational Science Award; no. UL1TR002548). The survey consisted of 14-34 items with branching logic. The association between participant demographics and in-house 3D printing was assessed using a chi-square test of independence.</p></div><div><h3>Results</h3><p>A total of 518 responses were recorded. The highest number of responses came from respondents in the 36-45-year age group. Most of the respondents were practice owners; 46.9% had 3D printers in their office. Chi-square tests of independence were performed on the data to see which associations existed. The strongest statistical associations with using an in-house 3D printer are seen with patient load, practice type, years since residency, and orthodontist’s position.</p></div><div><h3>Conclusions</h3><p>Approximately 75% of orthodontists use 3D printing technology in some capacity in North America. Major factors that influenced orthodontists to incorporate 3D printing technology into their office were self-interest and research. Major factors that have prevented orthodontists from not incorporating 3D printing technology into their office were space for equipment/ventilation and digital workflow training deficit. Orthodontists use their 3D printers mostly to make plastic retainers from printed models. The strongest associations with using in-house 3D printers are seen in patient load, practice type, years since residency, and orthodontist position. Increasing patient load and being in private practice increases the likelihood of having a 3D printer.</p></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140864016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Midpalatal miniscrew insertion: The accuracy of digital planning and surgical placement","authors":"Adli M.Q. Al-Gazzawi ,&nbsp;Vanessa Knode ,&nbsp;Bjorn Ludwig ,&nbsp;Alaa Othman ,&nbsp;Angelo Salamini ,&nbsp;Nikolaos Pandis ,&nbsp;Padhraig S. Fleming","doi":"10.1016/j.ajodo.2024.02.014","DOIUrl":"10.1016/j.ajodo.2024.02.014","url":null,"abstract":"<div><h3>Introduction</h3><p>The objective of this study was to investigate the accuracy of palatal miniscrew insertion, evaluating the effect of guide fabrication and surgical placement.</p></div><div><h3>Methods</h3><p>Guided insertion of bilateral paramedian palatal miniscrews was undertaken using Appliance Designer software (3Shape, Copenhagen, Denmark). A resin surgical guide (P Pro Surgical Guide; Straumann AG, Basel, Switzerland) was used. Superimposition of the miniscrew position relative to the digital design was undertaken using bespoke software (Inspect 3D module, OnyxCeph; Image Instruments GmbH, Chemnitz, Germany) to assess surgical inaccuracy. Miniscrew position relative to the surgical guide was also assessed to isolate the effect of planning inaccuracies. Both horizontal and vertical discrepancies were evaluated at both implant locations.</p></div><div><h3>Results</h3><p>Twenty-seven patients having bilateral palatal insertions were examined. Mean discrepancies were &lt;0.5 mm, both in the horizontal and vertical planes. The mean overall horizontal and vertical discrepancy between the digital design and final miniscrew position on the left side was 0.32 ± 0.15 mm and 0.34 ± 0.17 mm, respectively. The maximum horizontal discrepancy observed was 0.72 mm. No significant differences were observed in relation to the accuracy of mini-implant positioning on the basis of sidedness, either for horizontal (<em>P</em> = 0.29) or vertical (<em>P</em> = 0.86) discrepancy.</p></div><div><h3>Conclusions</h3><p>High levels of accuracy associated with guided insertion of paramedian palatal implants were recorded with mean discrepancies of less than 0.5 mm both in the horizontal and vertical planes. No difference in accuracy was noted between the left and right sides. Very minor levels of inaccuracy associated both with surgical techniques and surgical guide fabrication were recorded.</p></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140770248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surgical vs nonsurgical treatments in patients with anterior open bite have similar effects in occlusal function: A 2-year follow-up study","authors":"Jahan Asmat,&nbsp;Goyal Manish,&nbsp;Kumar Mukesh,&nbsp;Yadav Ekta","doi":"10.1016/j.ajodo.2024.03.007","DOIUrl":"10.1016/j.ajodo.2024.03.007","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141472294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Time blindness","authors":"Laurance Jerrold","doi":"10.1016/j.ajodo.2024.04.001","DOIUrl":"10.1016/j.ajodo.2024.04.001","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141472295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"You are not alone","authors":"Peter M. Greco","doi":"10.1016/j.ajodo.2024.04.002","DOIUrl":"10.1016/j.ajodo.2024.04.002","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141472296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of varying auxiliaries on maxillary incisor torque control with clear aligners: A finite element analysis","authors":"Ya-Ya Hong ,&nbsp;Ting Kang ,&nbsp;Meng-Qi Zhou ,&nbsp;Jia-Yong Zhong ,&nbsp;Xue-Peng Chen","doi":"10.1016/j.ajodo.2024.02.012","DOIUrl":"10.1016/j.ajodo.2024.02.012","url":null,"abstract":"<div><h3>Introduction</h3><p>This study aimed to evaluate the effects of varying auxiliaries on tooth movement and stress distribution when maxillary central incisors were torqued 1° with a clear aligner through finite element analysis.</p></div><div><h3>Methods</h3><p>Three-dimensional finite element models, including maxillary alveolar bone, periodontal ligament, dentition, and clear aligner, were constructed. According to the auxiliaries designed on the maxillary central incisor, 5 models were created: (1) without auxiliaries (control model), (2) with the power ridge, (3) with the semi-ellipsoid attachment, (4) with the horizontal rectangular attachment, and (5) with the horizontal cylinder attachment. The tooth movement and periodontal ligament stress distribution after a palatal root torque of 1° were analyzed for each of the 5 models.</p></div><div><h3>Results</h3><p>With 1° torque predicted, the maxillary central incisor without auxiliaries showed a tendency of labial tipping, mesial tipping, and intrusion. The rotation center moved occlusally in the power ridge model. The labiolingual inclination variation increased in the semi-ellipsoid attachment model but decreased in the power ridge model. The maxillary central incisor is twisted in the distal direction in the power ridge model. The maxillary central incisor of the horizontal rectangular attachment and the horizontal cylinder attachment model behaved similarly to the control model. Periodontal stresses were concentrated in the cervical and apical areas. The maximum von Mises stresses were 11.6, 12.4, 3.81, 1.14, and 11.0 kPa in the 5 models. The semi-ellipsoid attachment model exhibited a more uniform stress distribution than the other models.</p></div><div><h3>Conclusions</h3><p>Semi-ellipsoid attachment performed better efficacy on labiolingual inclination, and power ridge performed better efficacy on root control. However, a distal twist of maxillary incisors could be generated by the power ridge.</p></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140796979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}