Journal of the World Federation of Orthodontists最新文献

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3D assessment of morphological changes, maxillary central incisor–incisive canal relationship, and root resorption in extraction fixed appliance therapy considering demographic and skeletal classifications 考虑人口统计学和骨骼分类的拔牙固定器治疗中形态学变化、上颌中切牙-尖根管关系和根吸收的三维评估。
IF 3.2
Journal of the World Federation of Orthodontists Pub Date : 2025-10-01 DOI: 10.1016/j.ejwf.2025.05.005
Remsh Khaled Al-Rokhami , Zhihua Li , Sarraj Ashour , Sadam Elayah , Bin Yang , Xin Zhao , Jingke Liu , Karim Ahmed Sakran
{"title":"3D assessment of morphological changes, maxillary central incisor–incisive canal relationship, and root resorption in extraction fixed appliance therapy considering demographic and skeletal classifications","authors":"Remsh Khaled Al-Rokhami ,&nbsp;Zhihua Li ,&nbsp;Sarraj Ashour ,&nbsp;Sadam Elayah ,&nbsp;Bin Yang ,&nbsp;Xin Zhao ,&nbsp;Jingke Liu ,&nbsp;Karim Ahmed Sakran","doi":"10.1016/j.ejwf.2025.05.005","DOIUrl":"10.1016/j.ejwf.2025.05.005","url":null,"abstract":"<div><h3>Background</h3><div>This study aimed to assess changes in morphology, the relationship between the maxillary central incisor (U1) and the incisive canal (IC) and estimate root resorption following extraction orthodontic treatment with fixed appliances, considering gender, age, and skeletal sagittal and facial classifications.</div></div><div><h3>Methods</h3><div>The sample comprised eighty-four maxillary central incisors from 42 patients treated with maxillary incisors retraction using fixed appliances with first premolars extraction. Measurements, including IC width, root-IC distance, cortical bone width, IC height, and root resorption, were taken before (T1) and after (T2) treatment at specified heights (H1, H2, and H3; 2, 4, and 6 mm above the labial cementoenamel junction of U1).</div></div><div><h3>Results</h3><div>Significant differences in IC width, U1 length, and U1 root-IC distance were observed across genders, age groups, and skeletal classifications. Root resorption was greater in females (2.60 ± 1.82 mm vs. 1.25 ± 1.20 mm, <em>P</em> = 0.008), adults (2.53 ± 1.71 mm vs. 1.28 ± 1.45 mm, <em>P</em> = 0.009), Class II subjects (2.30 ± 1.86 mm vs. 1.47 ± 1.22 mm, <em>P</em> = 0.040), and the high angle facial group (3.41 ± 1.49 mm vs. 1.10 ± 1.23 mm vs. 0.90 ± 0.75 mm, <em>P</em> &lt; 0.001). Root-IC proximity increased after treatment, showing a positive correlation with resorption, especially at H2 level for approximation (66.7%) and contact (31%), and at the H1 level for invasion (25%). Multivariate regression identified U1 tooth movement and IC height as key factors in negative U1-IC relationships.</div></div><div><h3>Conclusions</h3><div>Extraction orthodontic treatment with fixed appliances significantly impacts the U1-IC relationship and contributes to root resorption, with variations across demographic and skeletal groups. These findings underscoring the need for precise treatment planning to reduce risks of root resorption and unfavorable U1-IC proximity.</div></div><div><h3>Clinical relevance</h3><div>These findings enhance orthodontic treatment planning by identifying factors influencing root resorption and preserving dental health during anterior teeth retraction.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 5","pages":"Pages 287-294"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144561355","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
Long-term stability of dental arch widths after extraction and nonextraction orthodontic treatment: A retrospective cohort study 拔牙和非拔牙正畸治疗后牙弓宽度的长期稳定性:一项回顾性队列研究。
IF 3.2
Journal of the World Federation of Orthodontists Pub Date : 2025-10-01 DOI: 10.1016/j.ejwf.2025.05.001
Theodora T. Giannakopoulou , Alexandra K. Papadopoulou , Dan Mike Busenhart , Theodore Eliades , Spyridon N. Papageorgiou
{"title":"Long-term stability of dental arch widths after extraction and nonextraction orthodontic treatment: A retrospective cohort study","authors":"Theodora T. Giannakopoulou ,&nbsp;Alexandra K. Papadopoulou ,&nbsp;Dan Mike Busenhart ,&nbsp;Theodore Eliades ,&nbsp;Spyridon N. Papageorgiou","doi":"10.1016/j.ejwf.2025.05.001","DOIUrl":"10.1016/j.ejwf.2025.05.001","url":null,"abstract":"<div><h3>Background</h3><div>Dental arch width is considered biologically determined and is associated with a balanced occlusion. However, it is often actively altered during orthodontic treatment and these modifications are associated with postorthodontic relapse. The purpose of this study was to assess the long-term dental arch width changes among patients treated orthodontically with fixed appliances and assess the effect of dental extractions.</div></div><div><h3>Methods</h3><div>Young (&lt;18 years) patients with malocclusion, who had been treated orthodontically with 0.018”-slot edgewise fixed appliances, were included in this retrospective longitudinal study. The maxillary/mandibular intercanine, interpremolar, and intermolar widths were digitally measured before treatment (T1), at debond (T2), and an average of 7 years post-debond (T3). Data was analyzed statistically at 5% with regression modeling, while a subsample of borderline patients was analyzed to assess the effect of extractions on long-term stability.</div></div><div><h3>Results</h3><div>A total of 104 patients were included (59.6% female; 11.5-year-old at T1), 39.4% (41/104) of which were treated with premolar extractions. All dental arch widths were increased during fixed appliance treatment, with considerable differences between extraction and nonextraction cases (<em>P &lt;</em> 0.05 in all cases). On average 7 years post-debond, nonextraction cases showed significant relapse in intermolar width, while intercanine and interpremolar widths remained stable. After baseline matching of extraction/nonextraction cases, tooth extractions were not associated with post-treatment relapse (<em>P</em> &gt; 0.05). Treatment-related (T1–T2) increases in all three dental arch widths were associated with post-treatment (T2–T3) relapse for both jaws, with 0.20–0.34 mm T2–T3 relapse for each additional 1 mm of width increase during T1–T2.</div></div><div><h3>Conclusions</h3><div>Modest dental arch width increases during fixed appliance treatment showed satisfactory stability in the long term, while greater archwire expansion was associated with increased relapse.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 5","pages":"Pages 266-273"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144303158","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
``All roads lead to Rio'' “条条大路通bbb”
IF 3.2
Journal of the World Federation of Orthodontists Pub Date : 2025-10-01 DOI: 10.1016/j.ejwf.2025.09.001
Vinod Krishnan
{"title":"``All roads lead to Rio''","authors":"Vinod Krishnan","doi":"10.1016/j.ejwf.2025.09.001","DOIUrl":"10.1016/j.ejwf.2025.09.001","url":null,"abstract":"","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 5","pages":"Pages 249-250"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145189639","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
Mechanical deterioration of passive self-ligating lingual brackets under simulated prolonged use: An in vitro study 模拟长时间使用被动自结扎舌托的机械退化:一项体外研究。
IF 3.2
Journal of the World Federation of Orthodontists Pub Date : 2025-10-01 DOI: 10.1016/j.ejwf.2025.05.007
Prasad Nalabothu , Konstantina Papadopoulou , Michel Dalstra , Giuseppe Scuzzo , Carlalberta Verna
{"title":"Mechanical deterioration of passive self-ligating lingual brackets under simulated prolonged use: An in vitro study","authors":"Prasad Nalabothu ,&nbsp;Konstantina Papadopoulou ,&nbsp;Michel Dalstra ,&nbsp;Giuseppe Scuzzo ,&nbsp;Carlalberta Verna","doi":"10.1016/j.ejwf.2025.05.007","DOIUrl":"10.1016/j.ejwf.2025.05.007","url":null,"abstract":"<div><h3>Background</h3><div>Passive, self-ligating lingual brackets are favored in Orthodontics for their simplified mechanism, eliminating the need for elastomeric and metallic ligatures. However, limited data exists on the effects of repeated use on their mechanical durability. An understanding of these effects is essential to ensure their long-term clinical performance.</div><div>This study evaluates the mechanical degradation of the sliding cap locking mechanism of passive self-ligating lingual brackets after repeated opening and closing cycles.</div></div><div><h3>Methods</h3><div>In this in vitro study, 60 ALIAS mandibular incisor brackets were subjected to repeated opening and closing cycles (5, 10, 20, and 40 cycles). Mechanical tests were performed using an Instron 3344 electronic universal testing machine to measure maximum force at failure (<em>F</em><sub>max</sub>), energy absorption at <em>F</em><sub>max</sub> (<em>U</em><sub>max</sub>), and initial stiffness of the bracket opening mechanism (<em>K</em>).</div></div><div><h3>Results</h3><div>The sliding cap remained functional throughout the test period. However, a significant reduction in <em>F</em><sub>max</sub>, <em>U</em><sub>max,</sub> and <em>K</em> over multiple opening and closing cycles. <em>F</em><sub>max</sub> showed a significant reduction after 5 opening and closing cycles (<em>P</em> = 0.0069), <em>U</em><sub>max</sub> after 10 cycles (<em>P</em> = 0.0243), and <em>K</em> showed after 5 cycles (<em>P</em> = 0.0002). The <em>F</em><sub>max</sub> reached a plateau at about 8–10 Newtons after 10 cycles, <em>U</em><sub>max</sub> at about 2.0 mJ (millijoules), and <em>K</em> at 50 N/mm after 10 cycles.</div></div><div><h3>Conclusions</h3><div>The study highlights significant advantages of passive self-ligating lingual brackets, showcasing their excellent initial performance. While ALIAS brackets may experience minor mechanical deterioration of the properties, their overall performance remains strong enough for entire duration of orthodontic treatment (2–3 years).</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 5","pages":"Pages 280-286"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144565396","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
Condylar volume changes in class II division 2 cases treated with unlocking the mandible using clear aligners 使用透明矫正器解锁下颌骨治疗II类2节病例的髁突体积变化。
IF 3.2
Journal of the World Federation of Orthodontists Pub Date : 2025-10-01 DOI: 10.1016/j.ejwf.2025.04.004
Hanie Morsi , Karla Carpio Horta , William Wiltshire , Giseon Heo , Tarek El-Bialy
{"title":"Condylar volume changes in class II division 2 cases treated with unlocking the mandible using clear aligners","authors":"Hanie Morsi ,&nbsp;Karla Carpio Horta ,&nbsp;William Wiltshire ,&nbsp;Giseon Heo ,&nbsp;Tarek El-Bialy","doi":"10.1016/j.ejwf.2025.04.004","DOIUrl":"10.1016/j.ejwf.2025.04.004","url":null,"abstract":"<div><h3>Introduction</h3><div>Class II Division 2 malocclusion involves retroclined maxillary incisors and deep overbite, often accompanied by mandibular retrusion. “Unlocking” the mandible by proclining the maxillary incisors, correcting the deep bite, and expanding the maxillary arch has been used to treat this malocclusion. However, the impact of this treatment, using Invisalign® clear aligners, on condylar volume remains unclear. This study evaluates three-dimensional changes in condylar volume after using Invisalign® to unlock the mandible in Class II Division 2 growing patients.</div></div><div><h3>Methods</h3><div>Cone-beam computed tomography (CBCT) data were collected from 22 adolescent patients (11 in the treatment group; 11 in the control group) at T1 (pre-treatment) and T2 (1.5-2 years post-T1). Dolphin imaging software was used for cephalometric tracing, while 3D Slicer and ITK-SNAP software calculated condylar volume. Repeated measure ANOVA compared condylar volume changes, and Pearson’s Correlation Coefficient assessed the relationship between condylar volume change and ANB angle in the treatment group.</div></div><div><h3>Results</h3><div>Both groups showed significant condylar volume increases between T1 and T2 (treatment: <em>P</em> &lt; 0.001, 127.45 ± 30.97, control: <em>P = 0.</em>015, 98.8 ± 36.31), with no significant difference between groups at T1 (<em>P = 0.</em>289, 89.19 ± 81.2) or T2 (<em>P = 0.</em>167, 117.9 ± 81.7). The change in ANB angle did not correlate with the condylar volume increase in the treatment group (Pearson’s <em>R</em> = -0.15, <em>P = 0.</em>681).</div></div><div><h3>Conclusion</h3><div>Unlocking the mandible successfully corrected Class II Division 2 malocclusion, but condylar volume increases in both groups were likely due to normal growth rather than treatment. Condylar volume change was not correlated with malocclusion correction.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 5","pages":"Pages 303-311"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144250132","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 direct and indirect skeletal anchorage for maxillary molar distalization in Class II malocclusion: A prospective clinical study 直接与间接骨支抗治疗II类错颌磨牙远端的前瞻性临床研究。
IF 3.2
Journal of the World Federation of Orthodontists Pub Date : 2025-10-01 DOI: 10.1016/j.ejwf.2025.05.002
Zeyad M. Ali , Marwa S. Shamaa , Mohammad H. Mohammad
{"title":"Comparison of direct and indirect skeletal anchorage for maxillary molar distalization in Class II malocclusion: A prospective clinical study","authors":"Zeyad M. Ali ,&nbsp;Marwa S. Shamaa ,&nbsp;Mohammad H. Mohammad","doi":"10.1016/j.ejwf.2025.05.002","DOIUrl":"10.1016/j.ejwf.2025.05.002","url":null,"abstract":"<div><h3>Background</h3><div>To compare the dentoalveolar and skeletal changes induced by the direct bone-anchored pull distal slider (PDS) and the indirect bone-anchored dual force distalizer (DFD) in Class II malocclusion patients.</div></div><div><h3>Materials and Methods</h3><div>Twenty subjects (mean age: PDS = 12.8 ± 0.9 years, DFD = 12.9 ± 1 years) were randomly assigned to either the PDS or DFD group. Both appliances employed temporary skeletal anchorage devices to achieve molar distalization. Lateral cephalometric radiographs and dental casts were analyzed before (T1) and after (T2) treatment to evaluate skeletal and dental effects.</div></div><div><h3>Results</h3><div>Both devices successfully distalized the maxillary first molars (PDS = 7 ± 1 months, DFD = 9 ± 2 months). The distalization amounts were not significantly different (<em>P</em> = 0.339). However, the PDS group exhibited minimal distal tipping (1.75° ± 0.63°, <em>P</em> &lt; 0.001), while the DFD group showed mesial tipping (2.27° ± 5.37°, <em>P</em> = 0.270). The PDS group demonstrated significant maxillary incisor retroclination (-3.21° ± 0.99°, <em>P</em> &lt; 0.001), whereas the DFD group exhibited significant proclination (2.95° ± 1.83°, <em>P</em> = 0.003) and mesial movement (0.91 ± 0.51 mm, <em>P</em> = 0.001). Additionally, the PDS group experienced spontaneous distal premolar drifting, while the DFD group showed mesial movement and tipping of the premolars.</div></div><div><h3>Conclusion</h3><div>Both PDS and DFD effectively distalized maxillary molars, but the PDS provided better control by minimizing tipping and anchorage loss, while the DFD caused anterior anchorage loss.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 5","pages":"Pages 251-258"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144327173","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
Reproducibility and accuracy of machine bent 3- and 6-stranded twistflex lingual fixed retainers—An in-vitro-study 机器弯曲3股和6股扭转弯曲舌固定固定器的再现性和准确性-体外研究。
IF 3.2
Journal of the World Federation of Orthodontists Pub Date : 2025-10-01 DOI: 10.1016/j.ejwf.2025.05.008
Katharina Klaus , Jan D. Pollmeier , Sabine Ruf
{"title":"Reproducibility and accuracy of machine bent 3- and 6-stranded twistflex lingual fixed retainers—An in-vitro-study","authors":"Katharina Klaus ,&nbsp;Jan D. Pollmeier ,&nbsp;Sabine Ruf","doi":"10.1016/j.ejwf.2025.05.008","DOIUrl":"10.1016/j.ejwf.2025.05.008","url":null,"abstract":"<div><h3>Background</h3><div>The present study aimed to evaluate the precision with which a retainer bending machine can produce the designed CAD/CAM retainer.</div></div><div><h3>Methods</h3><div>Canine-to-canine retainers were digitally designed and fabricated ten times each on 20 debonding casts (10 upper, 10 lower) using the Bender II (YOAT Corp., Lynnwood, WA) with either 3- or 6-stranded twistflex wire. A master retainer for each model was created from the CAD/CAM coordinates and saved as a standard tessellation language (STL) file. All bent retainers were subsequently digitized using a laboratory scanner and superimposed with the master retainer (best-fit). Deviations between the machine-bent and master retainers were measured in millimeters across transversal, sagittal, and vertical dimensions. Statistical analysis was performed using a mixed linear model with fixed factors (jaw, wire type, number of retainers) and the number of casts as a random factor.</div></div><div><h3>Results</h3><div>For the entire sample, mean deviations ± standard deviation between master and bent retainers were 0.22 mm ± 0.64 in the transverse, –0.01 mm ± 0.33 in the sagittal, and 0.48 mm ± 0.23 in the vertical dimension. Lower retainers were found to be significantly more precise than upper retainers across all dimensions (transverse: <em>P</em> &lt; 0.001; sagittal: <em>P</em> &lt; 0.05; vertical: <em>P</em> &lt; 0.001). Additionally, 3-stranded twistflex retainers demonstrated significantly greater accuracy compared to 6-stranded wires (transverse: <em>P</em> &lt; 0.05; sagittal: <em>P</em> &lt; 0.05; vertical: <em>P</em> &lt; 0.001).</div></div><div><h3>Conclusions</h3><div>The deviations in accuracy between the CAD/CAM planned retainer design and the machine-bent retainers could be clinically relevant, particularly for upper retainers in the transverse and vertical dimensions.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 5","pages":"Pages 295-302"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144676058","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
Anteroposterior displacements of the jaws and incisors relative to the forehead during growth: A longitudinal cephalometric analysis of untreated subjects with Class I occlusions 生长过程中颌骨和门牙相对于前额的前后移位:一项未经治疗的I类咬合受试者的纵向头颅测量分析。
IF 3.2
Journal of the World Federation of Orthodontists Pub Date : 2025-10-01 DOI: 10.1016/j.ejwf.2025.05.006
Will A. Andrews , Adam J. Rudmann
{"title":"Anteroposterior displacements of the jaws and incisors relative to the forehead during growth: A longitudinal cephalometric analysis of untreated subjects with Class I occlusions","authors":"Will A. Andrews ,&nbsp;Adam J. Rudmann","doi":"10.1016/j.ejwf.2025.05.006","DOIUrl":"10.1016/j.ejwf.2025.05.006","url":null,"abstract":"<div><h3>Objective</h3><div>To assess anteroposterior (AP) displacements of the jaws and incisors relative to the forehead in untreated growing subjects with normal (Class I) occlusions.</div></div><div><h3>Materials and Methods</h3><div>Serial lateral cephalograms from 74 untreated subjects (37 female, 37 male) with Class I dental relationships were obtained from the AAOF Craniofacial Growth Legacy Collection. Mean age at T1 was 9.9 years; T2 was 17.6 years. T1 tracings were secured over millimeter graph paper with Frankfort Horizontal aligned horizontally. Superimpositions were guided by anterior cranial base structures, then shifted along Frankfort Horizontal so that glabella on T1 and T2 shared a common vertical plane (Glabella-Vertical [GV]). AP displacements of Point A (Pt A), Point B (Pt B), maxillary central incisor’s FA point (U1FA), and mandibular central incisor’s FA point (L1FA) were measured relative to GV. Changes in occlusal plane (OP) inclinations were also measured.</div></div><div><h3>Results</h3><div>Average AP displacement at Pt A was –0.47 mm; Pt B +0.71 mm; U1FA +0.32 mm; and L1FA +0.82 mm. OP inclination decreased 2.3<sup>0</sup> on average. Displacement of L1FA was significantly different between genders (M, +1.16 mm; F, +0.47 mm; <em>P</em> = 0.04). No significant differences between genders were found for any other variable.</div></div><div><h3>Conclusions</h3><div>AP jaw and incisor positions were effectively static relative to GV during normal growth between ages 9 and 18 with untreated Class I occlusions. On average, no site underwent AP displacement relative to GV that exceeded 1 mm. The OP tended to rotate counterclockwise. In subjects with Class I dental relationships, pretreatment jaw, and incisor positions do not undergo significant AP changes relative to GV during growth after 9 years of age regardless of gender. GV could thus serve as a reliable AP diagnostic landmark in growing patients.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 5","pages":"Pages 274-279"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144565395","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
Effectiveness of Mini-screw and Nance palatal arch for anchorage control following segmental maxillary canine retraction in adolescents with angle Class I crowding using 3D digital models: A randomized clinical trial 基于三维数字模型的mini -螺钉和Nance腭弓对青少年I类角拥挤上颌犬段性后缩支抗控制的有效性:一项随机临床试验。
IF 3.2
Journal of the World Federation of Orthodontists Pub Date : 2025-10-01 DOI: 10.1016/j.ejwf.2025.04.003
Sanjeev Verma , Vinay Kumar , Raj Kumar Verma , Satinder Pal Singh , Shagun Sharma
{"title":"Effectiveness of Mini-screw and Nance palatal arch for anchorage control following segmental maxillary canine retraction in adolescents with angle Class I crowding using 3D digital models: A randomized clinical trial","authors":"Sanjeev Verma ,&nbsp;Vinay Kumar ,&nbsp;Raj Kumar Verma ,&nbsp;Satinder Pal Singh ,&nbsp;Shagun Sharma","doi":"10.1016/j.ejwf.2025.04.003","DOIUrl":"10.1016/j.ejwf.2025.04.003","url":null,"abstract":"<div><h3>Objectives</h3><div>To compare anchorage control and treatment duration between Mini-screws and the Nance palatal arch during segmental canine retraction in adolescents.</div></div><div><h3>Trial Design</h3><div>Two-arm, parallel-group randomized controlled trial.</div></div><div><h3>Methodology</h3><div>Fifty patients (11–18 years) requiring first premolar extraction were randomly assigned to Group 1 (Nance palatal arch) or Group 2 (Mini-screw) in the ratio of 1:1. Eligibility criteria included Angle’s Class I molar relation, tooth material arch length discrepancy more than 10 mm, requiring first premolar extraction. Allocation was concealed using sequentially numbered, opaque, sealed envelopes. Pretreatment and postretraction digital models were analyzed after individual canine retraction with Burstone’s T-loop using 3-matic software. <em>t</em> tests were used to assess tooth movement, and the Mann–Whitney test was employed to evaluate treatment duration (<em>P</em> &lt; 0.05).</div></div><div><h3>Results</h3><div>All 25 patients in the Nance group completed the trial. Two patients in the Mini-screw group were excluded due to screw loosening (<em>n</em> = 23 analyzed). The mean distal canine movement was similar in both groups, but molar mesial movement was significantly lower in Group 2 (0.68 and 0.41 mm) than in Group 1 (1.68 and 1.61 mm). The treatment duration was significantly less Group 2 (173.2 days) compared to Group 1 (186.0 days).</div></div><div><h3>Harms</h3><div>No harms were reported in the trail.</div></div><div><h3>Conclusion</h3><div>Although the mesial movement of molars was significantly less for the Mini-screws, the Nance palatal appliance was clinically equally effective in reinforcing the distal movement of canines. The differences in anchorage loss between the two modalities were small, and clinical judgment is thus imperative for decision-making and planning for absolute anchorage with a Mini-screw.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 5","pages":"Pages 259-265"},"PeriodicalIF":3.2,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144327174","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
Assessing an AI-driven remote monitoring system for reliable clinical photo acquisition and patient usability. 评估人工智能驱动的远程监测系统,以获得可靠的临床照片采集和患者可用性。
IF 3.2
Journal of the World Federation of Orthodontists Pub Date : 2025-09-25 DOI: 10.1016/j.ejwf.2025.08.002
Mohammed H Elnagar, Hilary Nieberg-Baskin, Mary Kay Becher, Zachary Joseph Mellion, Blake R Borello, Brian Wilk, Rayan Skafi
{"title":"Assessing an AI-driven remote monitoring system for reliable clinical photo acquisition and patient usability.","authors":"Mohammed H Elnagar, Hilary Nieberg-Baskin, Mary Kay Becher, Zachary Joseph Mellion, Blake R Borello, Brian Wilk, Rayan Skafi","doi":"10.1016/j.ejwf.2025.08.002","DOIUrl":"https://doi.org/10.1016/j.ejwf.2025.08.002","url":null,"abstract":"<p><strong>Background: </strong>This study aimed to evaluate the validity and usability of DentalMonitoring (DM), an Artificial Intelligence Driven Remote Monitoring (AIDRM) system, in providing standardized, high-quality photo sets that are clinically suitable for the visual assessment of various clinical parameters.</p><p><strong>Methods: </strong>Two independent prospective multi-centric investigations were conducted: The first, a usability investigation, included 63 patients from five sites in the United States. Its goal was to evaluate the usability of DM across four age groups, including individuals with physical disabilities. Patients provided subjective feedback through a questionnaire, while healthcare professionals conducted an objective evaluation of task performance. The second, a validity investigation, involved 104 patients from five other sites in the United States. This study aimed to compare the visual assessment of DM picture sets against the gold standard of standardized live assessments conducted by the same dental expert. Five clinical parameters per arch were evaluated, resulting in a total of 1,040 visual assessment parameters.</p><p><strong>Results: </strong>In the usability investigation, most patients were able to achieve the steps with relative ease with no significant differences between types of participants. In the validity investigation, the global agreement between the two evaluations for the 1040 results generated for the five clinical parameters pooled was 98.9%.</p><p><strong>Conclusions: </strong>The study found that DM was user-friendly for all participants and that the photosets produced by the DM scans were substantially equivalent to the clinical live assessments conducted by dental experts. This suggests that DM is a highly reliable AIDRM tool, allowing healthcare professionals and patients to consistently produce high-quality image sets without requiring assistance or prior experience. This achievement opens the door to a new paradigm in orthodontic patient follow-up and may bring new dental prevention and treatment follow-up strategies.</p>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145179281","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
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