American Journal of Orthodontics and Dentofacial Orthopedics最新文献

{"title":"Directory: AAO Officers and Organizations","authors":"","doi":"10.1016/S0889-5406(25)00364-6","DOIUrl":"10.1016/S0889-5406(25)00364-6","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 4","pages":"Page 518"},"PeriodicalIF":3.0,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121110","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":"Warts and all","authors":"Laurance Jerrold","doi":"10.1016/j.ajodo.2025.07.005","DOIUrl":"10.1016/j.ajodo.2025.07.005","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 4","pages":"Pages 515-516"},"PeriodicalIF":3.0,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145120972","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":"Information for readers","authors":"","doi":"10.1016/S0889-5406(25)00356-7","DOIUrl":"10.1016/S0889-5406(25)00356-7","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 4","pages":"Page A8"},"PeriodicalIF":3.0,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145121109","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":"Micro-computed tomography assessment of regional and overall accuracy of thermoformed retainers and intraoral scanners","authors":"Maria Luna Montes ,&nbsp;Mina Atef Zakhary ,&nbsp;Santiago F. Cobos ,&nbsp;Chia-Ling Kuo ,&nbsp;Kelin Zhong ,&nbsp;Sarah Abu Arqub ,&nbsp;Flavio Uribe","doi":"10.1016/j.ajodo.2025.07.014","DOIUrl":"10.1016/j.ajodo.2025.07.014","url":null,"abstract":"<div><h3>Introduction</h3><div>This retrospective in vitro study aimed to assess the accuracy of retainers fabricated using Essix (Dentsply Sirona, Charlotte, NC) and Zendura (Zendura Dental, Fremont, Calif), and to compare the accuracy of intraoral scanners iTero (Align Technology, San Jose, Calif) and TRIOS (3Shape, Copenhagen, Denmark). In addition, regional accuracy across different areas of the mandibular arch was analyzed.</div></div><div><h3>Methods</h3><div>A total of 20 standard tessellation language files from postorthodontic treatment mandibular arches (from January 2019 to August 2024) were selected based on specific inclusion criteria. The standard tessellation language files were 3-dimensional printed and scanned using iTero Element 2 and TRIOS 4, then used to fabricate 20 sets of each thermoformed retainer (Zendura and Essix). All models were scanned using micro-computed tomography (Scanco Medical AG, Brüttisellen, Switzerland), serving as the gold standard for accuracy comparisons. Root mean square (RMS) error analysis was used to assess overall and regional accuracy.</div></div><div><h3>Results</h3><div>The RMS error between gold standard and retainers differed significantly overall (<em>P</em> = 0.044), particularly in the anterior (<em>P</em> = 0.030) and premolar (<em>P</em> = 0.017) regions, with greater discrepancies in Zendura retainers. RMS error differences were not significant between intraoral scanners across most regions, except for borderline significance in the anterior region (<em>P</em> = 0.058), in which TRIOS showed larger deviations.</div></div><div><h3>Conclusions</h3><div>Both intraoral scanners demonstrated comparable accuracy. However, Zendura retainers exhibited greater inaccuracies than Essix. Regional analysis showed higher deviations in the molar and lingual regions for scanners and the molar regions for retainers. Importantly, these discrepancies were low and clinically insignificant.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 6","pages":"Pages 705-717"},"PeriodicalIF":3.0,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145071075","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":"A comparison of survival rates using 3 methods of mandibular fixed retainer fabrication: A randomized clinical trial","authors":"Ama Johal ,&nbsp;Kieran Daly ,&nbsp;Dylan Murray","doi":"10.1016/j.ajodo.2025.08.005","DOIUrl":"10.1016/j.ajodo.2025.08.005","url":null,"abstract":"<div><h3>Introduction</h3><div>The objective of this prospective trial was to compare the 2-year survival of bonded mandibular lingual retainers, using 3 different fabrication methods, as well as comparing a range of clinical and patient-centered outcomes.</div></div><div><h3>Methods</h3><div>This was a single-center, prospective, randomized clinical trial based in a specialist orthodontic practice setting between November 2017 and December 2021. A total of 300 participants, aged 14 and 18 years, who had completed a course of comprehensive fixed appliance treatment, were randomly allocated to 1 of 3 mandibular fixed retainer fabrication intervention groups: chairside-fabricated and directly bonded Ortho FlexTech; laboratory-fabricated and indirectly bonded multistranded gold-plated wire; and laboratory-fabricated and directly bonded Blu-Elgiloy wire. The primary outcome measure was the 2-year survival of retainers, and secondary outcomes included the clinical efficiency and effectiveness of the 3 methods, along with patient-reported outcomes. An electronic block randomization program was used along with opaque envelopes to conceal allocation. All data were anonymized and assessed blind, using descriptive statistics, and analyzed to detect between-group differences.</div></div><div><h3>Results</h3><div>There was a significant difference in bonded wire survival between the 3 groups. Survival at 2 years was estimated to be 68% in the multistrand group, and &gt;90% in the other 2 groups. As there was an overall difference in survival between the 3 groups, additional comparisons were made between each pair of groups. The results suggested statistically significant differences between both the Direct Ortho Flex and BlueElgiloy groups with the multistrand group (Bonferroni-adjusted <em>P</em> &lt;0.001). Highly significant (<em>P</em> &lt;0.001) differences were detected in the mean (standard deviation) combined fabrication and clinical time (seconds) between the direct Ortho FlexTech (733 [SD, 122]) and the other 2 indirect methods of multistranded retainer (2948 [SD, 409]) and the Blu-Elgiloy group (2522 [SD, 436]). No significant differences were detected in the alignment of the mandibular anterior teeth, periodontal parameters, or patient-reported outcomes.</div></div><div><h3>Conclusions</h3><div>At 24 months, significant differences were observed in bonded wire survival between the 3 groups. The direct Ortho FlexTech means that combined fabrication and clinical time was 3 times faster than the other 2 indirect methods. No significant differences were detected in the alignment of the mandibular anterior teeth, periodontal parameters, or patient-reported outcomes.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 6","pages":"Pages 682-694"},"PeriodicalIF":3.0,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145058744","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":"Geometric morphometric analyses of dental arch changes: A 40-year follow-up in patients with initial mild and severe crowding treated with 4 premolar extractions","authors":"Caroline Martins Gambardela-Tkacz ,&nbsp;Gabriela de Domênico Alcaraz Ros ,&nbsp;Paula Cotrin ,&nbsp;Gabriel Eduardo Bravo Vallejo ,&nbsp;Renan Morais Peloso ,&nbsp;Tiago Fialho ,&nbsp;Daniela Garib ,&nbsp;Diego Astúa ,&nbsp;Karina Maria Salvatore de Freitas ,&nbsp;Marcos Roberto de Freitas","doi":"10.1016/j.ajodo.2025.07.013","DOIUrl":"10.1016/j.ajodo.2025.07.013","url":null,"abstract":"<div><h3>Introduction</h3><div>This research aimed to evaluate changes in dental arch shape during orthodontic treatment and long-term follow-up (T3) in patients treated with 4 premolar extractions because of mild to severe initial dental crowding using the geometric morphometric analysis.</div></div><div><h3>Methods</h3><div>The sample consisted of 32 patients treated with 4 premolar extractions divided into 2 groups according to the Little’s irregularity index (LII) at pretreatment (T1; mild or severe crowding). Group mild crowding: 15 subjects with an initial LII of ≤6 mm, and mean T1, posttreatment (T2), and T3 ages of 13.52, 16.05, and 55.15 years, respectively. The mean treatment and T3 times were 2.53 and 39.09 years, respectively. Group severe crowding: 17 subjects with an initial LII of &gt;6 mm with mean T1, T2, and T3 ages of 13.43, 15.48, and 54.41 years, respectively. The mean treatment and T3 times were 2.05 and 38.92 years, respectively. The images from the digital dental models at T1, T2, and T3 were analyzed with principal components analysis and canonical variates analysis on shape variables after a generalized procrustes analysis, to examine intragroup and intergroup arch shape changes at T1, T2, and T3.</div></div><div><h3>Results</h3><div>The principal components analysis revealed that the arch shape variations at T1 were related to the displacement of incisors and canines. At T2, the variations were due to the 4-premolar extractions and anterior retraction. The variation after nearly 40 years was related to both the relapse of anteroinferior teeth and the aging of the occlusion. The arch shape changed with treatment and remained acceptable at T3. The canonical variates analysis illustrated that the maxillary and mandibular shape of dental arches were similar for both groups.</div></div><div><h3>Conclusions</h3><div>Dental arch shape was modified during orthodontic treatment and remained relatively stable at T3 in both groups, despite some degree of relapse and maturational changes in the occlusion.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 6","pages":"Pages 695-704"},"PeriodicalIF":3.0,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145056104","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":"Comparison of shear bond strengths of clear aligner attachments to full-contour zirconia crowns with different sandblasting times and primers: An in vitro study","authors":"Viet Anh Nguyen ,&nbsp;Khanh Linh Trinh ,&nbsp;Thi Lan Anh Le ,&nbsp;Huy Cong Nguyen","doi":"10.1016/j.ajodo.2025.08.007","DOIUrl":"10.1016/j.ajodo.2025.08.007","url":null,"abstract":"<div><h3>Introduction</h3><div>This study investigated the effect of sandblasting time and primer type on the shear bond strength of composite attachments to full-contour zirconia crowns.</div></div><div><h3>Methods</h3><div>A total of 108 zirconia specimens were fabricated and divided into 9 groups (n = 12) according to sandblasting time (10, 30, and 60 seconds) and primer type (silane, 10-methacryloyloxydecyl dihydrogen phosphate [MDP], universal). After sandblasting with 110-μm alumina particles, specimens were primed, and attachments were bonded using a packable composite. Surface roughness was measured, and scanning electron microscopy analysis was performed on an additional 36 specimens. Specimens underwent thermocycling before shear bond strength testing. Failure modes were assessed using a digital microscope and categorized based on the Adhesive Remnant Index (ARI) as adhesive, cohesive, or mixed. Data analyses were conducted using 2-way analysis of variance and chi-square tests.</div></div><div><h3>Results</h3><div>Surface roughness and microirregularities peaked at 30 seconds. Both sandblasting time and primer type significantly influenced the shear bond strength (<em>P</em> &lt;0.001). MDP and universal primers consistently outperformed silane. Optimal bond strength varied with primer type and sandblasting time: 30 seconds with MDP yielded 12.02 MPa, whereas 60 seconds with universal primer reached 14.56 MPa. Silane resulted in predominantly adhesive failures (ARI, 0). Mixed failures (ARI, 1) were more common with MDP and universal primers, particularly at 60 seconds of sandblasting with the universal primer.</div></div><div><h3>Conclusions</h3><div>This study highlights the importance of sandblasting duration and primer selection in optimizing bond strength to zirconia. Both MDP and universal primers achieved clinically acceptable bond strength, with their performance influenced by sandblasting time.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 6","pages":"Pages 729-738"},"PeriodicalIF":3.0,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145031182","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":"Zip those lips","authors":"Laurance Jerrold","doi":"10.1016/j.ajodo.2025.06.001","DOIUrl":"10.1016/j.ajodo.2025.06.001","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 3","pages":"Pages 387-389"},"PeriodicalIF":3.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912262","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":"Directory: AAO Officers and Organizations","authors":"","doi":"10.1016/S0889-5406(25)00323-3","DOIUrl":"10.1016/S0889-5406(25)00323-3","url":null,"abstract":"","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 3","pages":"Page 393"},"PeriodicalIF":3.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912265","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":"Shear bond strength of 3-dimensional-printed orthodontic brackets","authors":"Gökhan Serhat Duran ,&nbsp;Kübra Gülnur Topsakal ,&nbsp;Yusufcan Akgün ,&nbsp;Nurgül Karadas Bakirhan ,&nbsp;Serkan Görgülü","doi":"10.1016/j.ajodo.2025.03.008","DOIUrl":"10.1016/j.ajodo.2025.03.008","url":null,"abstract":"<div><h3>Introduction</h3><div>This in vitro study aimed to evaluate the shear bond strength (SBS) and adhesive remnant index (ARI) of 3-dimensional-printed orthodontic brackets with 3 different base designs and to examine the surface morphologic differences of remaining adhesives using scanning electron microscopy (SEM).</div></div><div><h3>Methods</h3><div>Sixty maxillary premolar teeth (n = 20 per group) were randomly allocated into 3 bracket base design groups: (1) custom, (2) macroretentive, and (3) standard. After digital scanning of the teeth, the brackets were printed using a MAX UV DLP 3D printer (Asiga, Sydney, Australia). Each bracket was bonded using Transbond XT composite and light-cured for 10 seconds with a light-emitting diode curing unit (Valo; Ultradent, South Jordan, Utah). Subsequently, SBS testing was performed using a universal testing machine at a 1 mm/min crosshead speed, and fracture loads were recorded in megapascals (MPa). After debonding, ARI scores were evaluated under a digital microscope by a blinded investigator and reevaluated after 2 weeks for reliability. In addition, bracket bases and tooth surfaces were examined under a high-resolution SEM (30 kV, 20 mm working distance).</div></div><div><h3>Results</h3><div>The highest SBS values were observed in the custom base design group (group A, 8.05 ± 4.69 MPa), followed by the macroretentive group (group B, 6.31 ± 3.80 MPa) and the standard group (group C, 5.91 ± 6.09 MPa). The differences between groups A and C were statistically significant (<em>P</em> = 0.017). ARI scores revealed that in groups A and B, most adhesive remained on the tooth (ARI score 2 predominated), whereas group C demonstrated a more variable ARI distribution. In addition, according to the SEM results, most adhesives have remained on the teeth in all groups.</div></div><div><h3>Conclusions</h3><div>Custom mesh designs in 3D-printed orthodontic brackets significantly enhance bond strength and adhesive retention, making them a promising option for clinical use. Future studies should investigate their performance under conditions that simulate the oral environment to validate their clinical applicability.</div></div>","PeriodicalId":50806,"journal":{"name":"American Journal of Orthodontics and Dentofacial Orthopedics","volume":"168 3","pages":"Pages 379-386"},"PeriodicalIF":3.0,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912261","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}