Journal of the World Federation of Orthodontists最新文献

{"title":"Nonsurgical treatment of an adult patient with severe transversal skeletal discrepancy: Tooth bone-borne tandem expander and hybrid aligner approach","authors":"","doi":"10.1016/j.ejwf.2024.03.008","DOIUrl":"10.1016/j.ejwf.2024.03.008","url":null,"abstract":"<div><h3>Background</h3><div>Although they have proven effective in the resolution of mild to moderate malocclusions, aligners demonstrate substantial limitations. More complex malocclusions therefore require a combination of auxiliaries, or a hybrid approach involving both aligners and fixed appliances, such as miniscrew-supported appliances or sectionals. This case report presents a 25-year-old female patient with a severe transversal discrepancy associated with an anterior open-bite tendency effectively treated with a tooth bone-borne palatal expander characterized by two expansion screws (tandem expander) and a hybrid treatment with aligners.</div></div><div><h3>Methods</h3><div>After accurate matching between the pretreatment cone-beam computed tomography scan and digital models, four self-drilling miniscrews were inserted palatally using a computer- aided design and computer-aided manufacturing surgical template to guide their correct and safe placement, and a tooth bone-borne appliance was fitted. After this first phase, the hybrid clear aligner approach was used to obtain alignment, leveling, and arch coordination, with the use of a partial lingual fixed appliance.</div></div><div><h3>Results</h3><div>Transverse maxillary deficiency was corrected, crowding has been resolved, Class I molar and canine relationship were obtained, and marginal ridges has been aligned.</div></div><div><h3>Conclusions</h3><div>Double jackscrew of the tandem expander enabled effective expansion of both the posterior segments as required to correct the skeletal discrepancy and the anterior region, thus relieving the dental crowding. Lingual sectional appliances have been shown to increase the effectiveness of clear aligners which, on the other hand, have been shown to be effective in closing the anterior bite by retroclination of the maxillary and mandibular incisors and, only minimally, by extrusion movements.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"13 5","pages":"Pages 250-256"},"PeriodicalIF":2.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140892679","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":"Comparison of the accuracy of bracket axial positioning with and without radiographic support and according to practitioner experience: A three-dimensional study","authors":"","doi":"10.1016/j.ejwf.2024.03.007","DOIUrl":"10.1016/j.ejwf.2024.03.007","url":null,"abstract":"<div><h3>Introduction</h3><div>Accurate bracket positioning remains challenging. To avoid angulation errors, some recommend examining the panoramic radiograph during bonding. However, it can cause distortions. Cone-beam computed tomography (CBCT) provides a more precise panoramic reconstruction but with higher radiation doses. The main objective of this study is to compare the accuracy of axial positioning between direct bonding without radiography, with conventional panoramic radiograph, and with panoramic reconstruction from CBCT. The secondary objectives are to evaluate positioning accuracy of each tooth and to assess the influence of practitioner level of experience.</div></div><div><h3>Methods</h3><div>Thirty practitioners, divided into two groups based on their experience performed direct bonding on a model thrice: without radiography, then with the conventional panoramic radiograph, then with the panoramic reconstruction from CBCT. Models were scanned, and angulation errors were measured using OrthoAnalyzer. Values were compared using the Friedman's test followed by the Bonferroni correction for multiple comparisons (<em>P</em>-value = 0.05).</div></div><div><h3>Results</h3><div>For the low level of experience group, angulation errors were significantly greater than the accepted limit without radiographic reference, and significantly lower with CBCT reconstruction. For the high level of experience group, angulation errors were significantly lower than the accepted limit for the three bonding methods. For every tooth, using the panoramic reconstruction from CBCT as a reference, was the most accurate method, regardless of the level of experience. More experienced practitioners made fewer errors for the three methods.</div></div><div><h3>Conclusions</h3><div>Panoramic reconstruction from CBCT is the most accurate method to limit angulation errors during direct bonding. Conventional panoramic radiography remains a reliable tool if used with caution. Bonding without any radiographic reference should be avoided especially for less experienced practitioners.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"13 5","pages":"Pages 199-210"},"PeriodicalIF":2.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140923630","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":"Molar incisor hypomineralization (MIH): The “Why, What and How” of decision making for orthodontists","authors":"Nikhillesh Vaiid ,&nbsp;Adith Venugopal ,&nbsp;Narayan Gandedkar ,&nbsp;Mauro Farella ,&nbsp;M. Ali Darendeliler ,&nbsp;Samar M. Adel ,&nbsp;Ludovica Nucci","doi":"10.1016/j.ejwf.2024.09.001","DOIUrl":"10.1016/j.ejwf.2024.09.001","url":null,"abstract":"<div><div>Molar-incisor hypomineralization (MIH) presents a significant clinical challenge in orthodontics, with its complex etiology, variable presentation, and profound impact on enamel homeostasis. Utilizing Simon Sinek's “Golden Circle” method, this article systematically explores the implications of MIH within orthodontic practice. The “Why” emphasizes the critical need for orthodontists to understand MIH, given its prevalence and potential to disrupt treatment outcomes. MIH affects up to 40.2% of the global population, and its association with increased caries risk, hypersensitivity, and restorative failures necessitates an informed approach to management. The “What” section addresses the importance of recognizing the phenotypic variability of MIH and its influence on oral health-related quality of life. MIH impacts social and psychological well-being, particularly when anterior teeth are involved, and complicates orthodontic treatment due to challenges in bonding, banding, and restorative protocols. The “How” provides practical guidelines for orthodontic management, including diagnostic considerations, tooth restoration strategies, and the complexities of first permanent molar extractions. Strategic planning is essential to avoid complications such as mesial drift, overeruption, or space loss, with a multidisciplinary approach often required. This article highlights the importance of long-term monitoring and patient-centered care in managing MIH-affected teeth, underscoring the evolving nature of clinical protocols. By framing the discussion through the Golden Circle, this critical review offers a structured and impactful approach to understanding and addressing MIH within orthodontic contexts, aiming to enhance treatment outcomes and patient quality of life.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"13 5","pages":"Pages 240-249"},"PeriodicalIF":2.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142297899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating the efficacy of platelet-rich plasma on orthodontic tooth movement rate: A systematic review and meta-analysis","authors":"","doi":"10.1016/j.ejwf.2024.04.003","DOIUrl":"10.1016/j.ejwf.2024.04.003","url":null,"abstract":"<div><h3>Background</h3><div>The main objective of this study was to evaluate the effect of autologous platelet-rich plasma (PRP) on acceleration of the orthodontic tooth movement and assess the evidence based on the available literature.</div></div><div><h3>Methods</h3><div>The trial was registered and reported according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Electronic databases including PubMed, Cochrane, Scopus, Central Register of Controlled Trials, and Google Scholar were searched for randomized controlled studies of PRP on the rate of tooth movement. The search was restricted to articles published in English between January 2000 to 31 December 2023. The search was completed by two reviewers independently and the risk of bias was evaluated using the Cochrane Risk of Bias tool (RoB 2.0) and meta-analysis was performed. Grading of Recommendations Assessment, Development, and Evaluation (GRADE) was done to determine the certainty of evidence.</div></div><div><h3>Results</h3><div>Thirteen studies were included in the systematic review and 10 were included in the quantitative analysis. A random-effects model for meta-analysis of seven studies evaluating the rate of canine retraction revealed a statistically significant increase in the rate of orthodontic tooth movement of 0.38 mm/month in 1 month (121 patients; 95% confidence interval [CI] 0.27–0.49; I² = 35%; <em>P &lt;</em> 0.001) which decreased to 0.09mm/month in the fourth month (80 patients; 95% CI 0.02–0.17; I² = 0%; <em>P &lt;</em> 0.02). Three studies that considered en masse retraction revealed a mean difference of 0.36mm over 3 months (40 patients; 95% CI <strong>−</strong>0.23 to 0.94; I² = 74%; <em>P &lt;</em> 0.23).</div></div><div><h3>Conclusions</h3><div>The study suggests that PRP application can accelerate tooth movement, but its effects decreased over 4 months. The results should be interpreted cautiously due to the study's inherent limitations.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"13 5","pages":"Pages 229-239"},"PeriodicalIF":2.6,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141307093","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":"Effect of printing technology, layer height, and orientation on assessment of 3D-printed models","authors":"","doi":"10.1016/j.ejwf.2024.03.006","DOIUrl":"10.1016/j.ejwf.2024.03.006","url":null,"abstract":"<div><h3>Background</h3><p>Three-dimensional (3D) printing technologies have become popular in orthodontics. The aim of this study is to determine the effect of printing technology, orientation, and layer height on the accuracy of 3D-printed dental models.</p></div><div><h3>Methods</h3><p>The maxillary arch of a post-treatment patient was scanned and printed at different orientations (0°, 90°) and layer thicknesses (25 µm, 50 µm, 100 µm, and 175 µm) using two different printing technologies (digital light processing and stereolithography). The 120 models were digitally scanned, and their average deviation from the initial model was analyzed using 3D algorithm. A multivariable linear regression analysis was used to estimate the effect of all variables on the average deviation from the initial model for the common layer thicknesses (50/100 µm). Finally, one-way ANOVA and Tukey posthoc test was used to compare the stereolithography (SLA) 25 µm and digital light processing (DLP) 175 µm groups with the groups that showed the least average deviation in the former analysis.</p></div><div><h3>Results</h3><p>The multivariable linear regression analysis showed that the DLP 50 µm (mean ± SD: −0.022 ± 0.012 mm) and 100 µm (mean ± SD: −0.02 ± 0.009 mm) horizontally printed models showed the least average deviation from the initial model. Finally, the DLP 175 µm horizontally printed models (mean ± SD: 0.015 ± 0.005 mm) and the SLA 25 µm horizontally (mean ± SD: 0.011 ± 0.005 mm) printed models were more accurate.</p></div><div><h3>Conclusions</h3><p>All the models showed dimensional accuracy within the reported clinically acceptable limits. The highest accuracy was observed with DLP printer, 175 µm layer thickness, and horizontal orientation followed by SLA printer, 25 µm layer thickness, and horizontal orientation.</p></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"13 4","pages":"Pages 169-174"},"PeriodicalIF":2.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140772827","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":"Male-to-female transgenders demonstrated unique perspectives on perceived facial attractiveness and orthognathic surgery need","authors":"","doi":"10.1016/j.ejwf.2024.03.001","DOIUrl":"10.1016/j.ejwf.2024.03.001","url":null,"abstract":"<div><h3>Purpose</h3><p>The esthetic preference and decision concerning undergoing orthognathic surgery in the transgender population have not been reported. The aims of this study were to examine the influence of the sagittal mandibular position on the esthetic perception and perceived surgery need in male-to-female transgenders (MTFTs) compared with male and female laypeople.</p></div><div><h3>Materials and Methods</h3><p>A questionnaire study was performed by male-to-female transgender, male and female laypeople. Three-dimensional black &amp; white male and female facial images with facial contour angle (FCA) of 3°, 1°, 5°, 9°,13°, 17°, and 21° were shown to the participants. The participants scored the images’ perceived facial attractiveness using visual analog scales (VAS) and indicated whether orthognathic surgery was needed.</p></div><div><h3>Results</h3><p>The participants included 85 MTFTs, 85 males, and 85 females. The results revealed that there were significant differences in the VAS scores between the MTFT and male participants. The MTFTs rated the male images with prognathism of 1° and -3°FCA in significantly lower scores compared with the males (<em>P</em> = 0.033, <em>P</em> = 0.010). Female images with prognathism 1°FCA was rated by the MTFTs in significantly lower scores compared with the males (<em>P</em> = 0.041). A significantly higher number of surgery needs was found in the MTFTs compared with the other groups.</p></div><div><h3>Conclusions</h3><p>Gender influences esthetic perception and the decision to undergo orthognathic surgery. MTFTs have a unique perspective on facial esthetics, being more desirous of surgery than males and females. Clinicians should be aware of the ideal expectation in facial esthetics in MTFTs.</p></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"13 4","pages":"Pages 162-168"},"PeriodicalIF":2.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140790164","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":"Retrospective evaluation of the success rate and factors associated with the stability of alveolar ridge orthodontic miniscrews: Pilot study","authors":"","doi":"10.1016/j.ejwf.2024.02.001","DOIUrl":"10.1016/j.ejwf.2024.02.001","url":null,"abstract":"<div><h3>Background</h3><p>An uncommon location for placing miniscrews, used to provide anchorage control in various tooth movements, is the alveolar ridge. This study aimed to provide an evaluation of the success rate of alveolar ridge miniscrews and examine variables that might impact their success.</p></div><div><h3>Methods</h3><p>Charts for 295 patients who had miniscrews were screened. Twenty patients (5 male and 15 female: average age = 38.15 ± 15.10 years) with a total of 50 alveolar ridge miniscrews were analyzed. A customized data form was used to collect patients’ and miniscrews’ related variables. Kaplan–Meier estimator was used for the survival function, whereas Cox proportional hazards regression models were used to associate collected variables with alveolar ridge miniscrew survival.</p></div><div><h3>Results</h3><p>In total, 31 (62.0%) miniscrews were stable and 19 (38.0%) failed. The survival time for those that failed was 6.03 ± 7.08 months. The follow-up period for those that survived was 35.84 ± 19.47 months. Male gender versus female (hazard ratio [HR] 2.46; 95% confidence interval [CI] 1.35–4.48; <em>P</em> = 0.003), and if the miniscrew was a replacement versus non-replacement (HR 0.27; 95% CI 0.07–0.99; <em>P</em> = 0.048) influenced the survival. Additionally, miniscrews that were used for both indirect and direct or indirect anchorage alone plus those with evidence of splinting showed a 100% survival rate, which led to an HR 0 (<em>P &lt;</em> 0.001). When the previously mentioned variables were modeled, none seemed to have a significant effect on failure except for splinting and type of anchorage (<em>P &lt;</em> 0.001), because none of the splinted miniscrews failed.</p></div><div><h3>Conclusions</h3><p>The failure rate of alveolar ridge miniscrews was (38.0%) over 6.03 ± 7.08 months. The survival rate was (62.0%) over 35.84 ± 19.47 months. The evidence of splinting and the type of anchorage had a significant effect on survival probability.</p></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"13 4","pages":"Pages 181-188"},"PeriodicalIF":2.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140766325","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":"Uprighting a mesially impacted mandibular second molar with scissor bite using simple tubes","authors":"","doi":"10.1016/j.ejwf.2024.02.002","DOIUrl":"10.1016/j.ejwf.2024.02.002","url":null,"abstract":"<div><p>Orthodontic uprighting or traction of an impacted mandibular second molar often necessitates invasive interventions. This report aims to illustrate the utilization of nickel-titanium wire segments inserted into small, simple tubes for uprighting mesially impacted mandibular second molars and also for scissor bite correction. The term “simple tube” refers to a tube without a bonding base attached to a tooth surface by covering it with flowable composite resin. Due to the absence of a bonding base, the simple tube is characterized by its diminutive size and minimal profile height, facilitating placement on partially exposed second molars and unconventional positioning to adjust the force geometry. In this case study, mesially-impacted mandibular second molars with scissor bite were uprighted in a 21-year-old male utilizing simple tubes. Simple tubes can be used for molar uprighting and scissor bite correction buccally and lingually.</p></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"13 4","pages":"Pages 189-196"},"PeriodicalIF":2.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140760049","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":"Bilateral distalization of maxillary first molars in a group of adult patients after extraction of maxillary second molars using infra-zygomatic mini-implants: A prospective clinical trial","authors":"","doi":"10.1016/j.ejwf.2024.03.005","DOIUrl":"10.1016/j.ejwf.2024.03.005","url":null,"abstract":"<div><h3>Background</h3><p>It is now possible to predictably distalize maxillary first molars in nongrowing patients with the infra-zygomatic gear distalizer and to improve malocclusions without having to extract the premolars and regardless of the patient's compliance. The purpose of this study was to investigate the amount and rate of distal movement of the maxillary first molars using our proposed appliance after extraction of maxillary second molars.</p></div><div><h3>Methods</h3><p>Ten nongrowing female patients successfully treated with our proposed appliance were the subjects of this study. The amount, rate, and type of distalization, were analyzed through upper jaw cone beam computed tomography (pre- and post-treatment) and scanned casts taken on a monthly interval.</p></div><div><h3>Results</h3><p>The average amount of distalization of the maxillary first molars was 4.03 mm at the crown level and 2.88 mm at the root level. The rate of distalization had an average of 0.61 mm per month with a maximum of 0.79 mm in the first month because of the regional acceleratory phenomena after extracting the maxillary second molar.</p></div><div><h3>Conclusions</h3><p>The maxillary first molars were distalized in a significant manner and all patients reached a Class I relation within an average duration of 6.4 months. The proposed appliance proved to be a viable noncompliance modality to distalize maxillary first molars correcting maxillary Class II malocclusions characterized by maxillary protrusion or maxillary incisor crowding.</p></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"13 4","pages":"Pages 155-161"},"PeriodicalIF":2.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140779319","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":"Integrating artificial intelligence: A step forward in orthodontic education","authors":"Vinod Krishnan","doi":"10.1016/j.ejwf.2024.07.002","DOIUrl":"10.1016/j.ejwf.2024.07.002","url":null,"abstract":"","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"13 4","pages":"Pages 153-154"},"PeriodicalIF":2.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141879628","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}