International Orthodontics最新文献

{"title":"Comparative evaluation of propolis, fluoride and probiotic mouthwashes on streptococcus mutans and oxidative stress in fixed orthodontic patients: A triple-blind, randomized controlled trial with 9-month follow-up","authors":"Praveen Chandrashekaraiah ,&nbsp;Reshma Benzigar ,&nbsp;Ramya Shivananjan ,&nbsp;Selva Arockiam ,&nbsp;Nithya Nandhini ,&nbsp;Sangeetha Ulaganathan","doi":"10.1016/j.ortho.2025.101017","DOIUrl":"10.1016/j.ortho.2025.101017","url":null,"abstract":"<div><h3>Background</h3><div>Fixed orthodontic appliances increase the risk of enamel demineralization due to plaque accumulation. While fluoride mouthwash is well established, propolis and probiotic formulations are emerging alternatives with antimicrobial and anti-inflammatory potential.</div></div><div><h3>Aim</h3><div>To compare the effects of propolis, fluoride, and probiotic mouthwashes on <em>Streptococcus mutans</em> levels and oxidative stress (8-OHdG) in patients undergoing fixed orthodontic treatment.</div></div><div><h3>Materials and methods</h3><div>Of 120 patients screened (March 2022–February 2023), 90 were randomized into three groups (<em>n</em> <!-->=<!--> <!-->30 each): propolis, fluoride, and probiotic. <em>S.</em> <em>mutans</em> was quantified at baseline, 30 days, 3-, 6- and 9-months using Q-PCR. Salivary 8-OHdG was measured using ELISA. Dietary and oral hygiene behaviours were monitored through a mobile app, interviews and 24-hour dietary recalls.</div></div><div><h3>Results</h3><div><em>S.</em> <em>mutans</em> levels (log10 CFU/mL) significantly decreased (<em>P</em> <!-->&lt;<!--> <!-->0.001) at 9 months: from 4.35<!--> <!-->±<!--> <!-->0.45 to 0.89<!--> <!-->±<!--> <!-->0.06 (propolis), 4.42<!--> <!-->±<!--> <!-->0.49 to 2.74<!--> <!-->±<!--> <!-->0.18 (fluoride), and 4.38<!--> <!-->±<!--> <!-->0.50 to 3.21<!--> <!-->±<!--> <!-->0.06 (probiotic). Ct values increased accordingly, confirming reduced bacterial load. Salivary 8-OHdG (ng/mL) declined significantly (<em>P</em> <!-->&lt;<!--> <!-->0.001): 3.8<!--> <!-->±<!--> <!-->0.8 to 0.32<!--> <!-->±<!--> <!-->0.14 (propolis), 3.9<!--> <!-->±<!--> <!-->0.7 to 1.32<!--> <!-->±<!--> <!-->0.18 (fluoride), 3.8<!--> <!-->±<!--> <!-->0.6 to 2.42<!--> <!-->±<!--> <!-->0.22 (probiotic).</div></div><div><h3>Conclusion</h3><div>Propolis mouthwash produced the greatest reductions likely due to the combined effect of standardized extract and essential oils added for taste. Fluoride remained effective for microbial control, while probiotics offered modest benefit. High compliance strengthened these findings. Further studies should isolate active components and assess long-term effects in broader settings.</div></div>","PeriodicalId":45449,"journal":{"name":"International Orthodontics","volume":"23 4","pages":"Article 101017"},"PeriodicalIF":1.8,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068013","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":"Accuracy of combining intraoral and facial scan in a single digital model of an orthodontic patient utilizing corresponding measurements on the model and on real photographs: A prospective cross-sectional study","authors":"Michail Vasoglou ,&nbsp;Ioanna Pouliezou ,&nbsp;Konstantinos Apostolopoulos ,&nbsp;Georgios Vasoglou","doi":"10.1016/j.ortho.2025.101015","DOIUrl":"10.1016/j.ortho.2025.101015","url":null,"abstract":"<div><h3>Objectives</h3><div>To validate the accuracy of integration of intraoral scan to the facial scan acquired by the EM3D application, utilising the Blue Sky Plan 4 software, creating a digital model of an orthodontic patient, by comparing the same linear measurements on real photographs and images from the digital model of the patient.</div></div><div><h3>Material and methods</h3><div>Thirty patients (20 females and 10 males; age range 12–30<!--> <!-->years) undergoing orthodontic treatment with fixed appliances were recruited in this prospective cross-sectional study from December 2024 to February 2025. Five facial landmarks were marked on each patient: Tragion right, Cheilion right and left, Subnasale and Pronasale. Intraoral scan and facial scan were performed at the same appointment. Facial scan was conducted using an iPhone 13 Pro with the EM3D face scanning application which utilizes the iPhone's TrueDepth camera technology while the patient was smiling. The STL (Stereolithography) and OBG (Object) files (acquired from intraoral and facial scan respectively) were combined in a digital model using the Blue Sky Plan 4 software. Lateral and frontal photographs of the patient's face, while smiling, were also acquired. Eight linear measurements (Tragion right – bracket #11, Tragion right – incisal #11, Cheilion right – #13, Cheilion left – #13, Subnasale – #11, Subnasale – #21, Pronasale – #11, Pronasale – #21) were digitally performed on the real and digital photographs of the patients using the facial landmarks and certain points on teeth and braces. Paired sample <em>t</em>-test and Wilcoxon signed-rank test were used for statistical analysis.</div></div><div><h3>Results</h3><div>Significantly statistical difference was detected only in one (Cheilion right – #13) measurement (<em>P</em> <!-->=<!--> <!-->0.004).</div></div><div><h3>Conclusion</h3><div>Combining intraoral and facial scan using a special software provides a clinically useful digital model of an orthodontic patient for diagnosis, treatment planning and outcome assessment.</div></div>","PeriodicalId":45449,"journal":{"name":"International Orthodontics","volume":"23 4","pages":"Article 101015"},"PeriodicalIF":1.8,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922787","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":"Knoop microhardness, surface roughness, and cytotoxicity analysis of arginine-modified experimental orthodontic resins: An in vitro study","authors":"Pérola Costa Bitencourt Santos ,&nbsp;Analia Gabriella Borges Ferraz Facury ,&nbsp;Lenita Marangoni Lopes ,&nbsp;Mário Alexandre Coelho Sinhoreti ,&nbsp;Daniel Navarro da Rocha ,&nbsp;Lourenço Correr-Sobrinho ,&nbsp;Ana Rosa Costa ,&nbsp;José Guilherme Neves","doi":"10.1016/j.ortho.2025.101014","DOIUrl":"10.1016/j.ortho.2025.101014","url":null,"abstract":"<div><h3>Aim</h3><div>The study aimed to evaluate the impact of incorporating 2.5%, 5%, and 7% arginine on the hardness, roughness, and cytotoxicity of 3M™ Transbond™ XT.</div></div><div><h3>Material and methods</h3><div>A total of 48 samples were divided into four groups (<em>n</em> <!-->=<!--> <!-->12): G1 – commercial resin 3M™ Transbond™ XT (TXT); G2 – TXT<!--> <!-->+<!--> <!-->2.5% arginine; G3 – TXT<!--> <!-->+<!--> <!-->5% arginine; and G4 – TXT<!--> <!-->+<!--> <!-->7% arginine. The hardness analysis was performed by a microhardness tester. The measurements of roughness were performed by a surface roughness measuring instrument. The surface morphology analysis was analyzed by digital images obtained with a scanning electron microscope (SEM). For the in vitro cytotoxicity test, dental pulp mesenchymal cells underwent a cell viability reduction assay. For statistical analysis, ANOVA (one-way/two-way) was used, followed by Tukey's test post hoc (<em>P</em> <!-->&lt;<!--> <!-->0.05).</div></div><div><h3>Results</h3><div>There was a reduction in the hardness of experimental resins compared to 3M™ Transbond™ XT commercial resin (<em>P</em> &lt; 0.05). There was no difference between concentrations of 2.5% and 5%, but there was the largest reduction in resin with 7% arginine (<em>P</em> &lt; 0.05). Surface roughness analysis showed there was no statistical difference between the samples (P ≥ 0.05). SEM also did not demonstrate changes in the surface roughness of the resins. All groups exhibited good cell viability at each timepoint. After 48h, an increase was observed for groups contaning arginine <!--> <!--> <!--> (<em>P</em> &lt; 0.05).<strong><em>Conclusion:</em></strong> Surface hardness was modified with when arginine incorporation - to the Transbond™ XT resin formulation. No differences were observed for surface roughness. Due to the initial cytotoxicity of the resins, precautions regarding satisfactory photopolymerization and the distance of application in relation to the gingival tissues must be adopted.</div></div>","PeriodicalId":45449,"journal":{"name":"International Orthodontics","volume":"23 4","pages":"Article 101014"},"PeriodicalIF":1.8,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922786","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":"Treatment for adult female temporomandibular joint osteoarthritis-related severe retrognathia and anterior open bite using premolar extraction and customized lingual orthodontic appliance with vertical control for significant compensation: A case report","authors":"Qiang Zhou ,&nbsp;Yue Zhang ,&nbsp;Jin Ke ,&nbsp;Yingjie Li","doi":"10.1016/j.ortho.2025.101016","DOIUrl":"10.1016/j.ortho.2025.101016","url":null,"abstract":"<div><div>This case report presents a satisfactory lingual appliance orthodontic treatment in a 21-year-old woman diagnosed with Angle Class I anterior open bite (AOB) malocclusion and severe high-angle skeletal Class II retrognathia, which was attributed to bilateral temporomandibular osteoarthritis (TMJOA) and disc perforation. Because of the absence of joint symptoms and presence of bilateral condyles in a stable state, no conservative or surgical treatments were performed for this patient. Four first premolars and four third molars were extracted before bonding of the customized lingual brackets. No miniscrews were used during the orthodontic process. Space closure was performed using the double cable method. Finally, the maxillary molars were found to have intruded and moved mesially during the space-closing process, which resulted in a 2.9° decrease in the mandibular plane angle. Owing to the counter-clockwise rotation of the mandible, the chin moved anteriorly and superiorly. In addition, the anterior teeth were largely retracted because of the advantage of this customized lingual appliance, resulting in significant changes in the nasolabial angle and chin contour. Two-year follow-up examinations further confirmed that no obvious relapse in occlusion and no further condylar resorption, even though bilateral anterior disc displacement without reduction was revealed. In conclusion, a patient with TMJOA-related severe chin retrognathia and AOB treated with a lingual appliance showed satisfactory improvement in facial profile and occlusion.</div></div>","PeriodicalId":45449,"journal":{"name":"International Orthodontics","volume":"23 4","pages":"Article 101016"},"PeriodicalIF":1.8,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906412","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":"Efficacy of artificial intelligence in radiographic dental age estimation of patients undergoing dental maturation: A systematic review and meta-analysis","authors":"Soheil Shahbazi ,&nbsp;Saharnaz Esmaeili ,&nbsp;Shahab Kavousinejad ,&nbsp;Farnaz Younessian ,&nbsp;Mohammad Behnaz","doi":"10.1016/j.ortho.2025.101010","DOIUrl":"10.1016/j.ortho.2025.101010","url":null,"abstract":"<div><h3>Background</h3><div>Dental age (DA) estimation, crucial for appropriate orthodontic and paediatric treatment planning, traditionally relies on the analysis of developmental stages of teeth. Artificial intelligence (AI) has been increasingly employed for DA estimation through dental radiographs. The current study aimed to systematically review the literature on the application of AI models for radiographic DA estimation among subjects undergoing dental maturation.</div></div><div><h3>Material and methods</h3><div>The electronic search was conducted through five databases, namely PubMed, Embase, Scopus, Web of Science, and Google Scholar, in July 2024. The search sought studies relying on AI models for DA estimation based on dental radiographs. Data were analysed using STATA software V.14 and heterogeneity was evaluated using I-squared statistics. A random-effects model was employed for meta-analysis. Publication bias was assessed using a funnel plot, Egger's test, Begg's test, and the trim-and-fill method. Heterogeneity was evaluated with a Galbraith plot, and sensitivity analysis tested robustness.</div></div><div><h3>Results</h3><div>Thirteen studies were deemed eligible for qualitative synthesis, seven of which were included in the meta-analysis. The mean absolute error varied from 0.6915 to 12.04, with accuracy between 0.404 and 0.959. Sensitivity ranged from 0.42 to 1.00, specificity ranged from 0.8014 to 0.982, and positive predictive value ranged from 0.43 to 0.90. The pooled accuracy of seven studies equalled 0.85 (95% CI: 0.79–0.91).</div></div><div><h3>Conclusion</h3><div>The present findings support the effectiveness of AI models in DA estimation of individuals under 25 years old based on their dental radiographs. However, further studies with larger sample sizes for both test and training datasets are suggested to validate the reliability and clinical applicability of AI in DA estimation.</div></div>","PeriodicalId":45449,"journal":{"name":"International Orthodontics","volume":"23 4","pages":"Article 101010"},"PeriodicalIF":1.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894600","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":"Four-year follow-up comparison of three pre-surgical infant orthopedic methods on mandibular arch morphology in unilateral cleft lip and palate: A retrospective study","authors":"Puneet Batra ,&nbsp;Ajay Kubavat ,&nbsp;Dhruv Ahuja","doi":"10.1016/j.ortho.2025.101013","DOIUrl":"10.1016/j.ortho.2025.101013","url":null,"abstract":"<div><h3>Objective</h3><div>To evaluate the impact of presurgical infant orthopedics (PSIO) on mandibular dimensions and inter arch relation at 4 years follow-up comparing three different PSIO methods (modified Grayson's technique, Dynacleft nasal elevator, OrthoAligner NAM with Dynacleft nasal elevator) to no-nasoalveolar molding (NAM) in infants with unilateral cleft lip and palate (UCLP).</div></div><div><h3>Methodology</h3><div>A retrospective cohort study was conducted on non-syndromic UCLP patients treated with either PSIO or no-PSIO between 2018 and 2019, with a 4-year follow-up. The cohort was divided into four groups of 13 patients each: group 1 received PSIO with the modified Grayson's technique, group 2 received PSIO with the Dynacleft nasal elevator, group 3 was treated with OrthoAligner NAM combined with Dynacleft nasal elevator, and group 4 received no PSIO. Mandibular transverse width and interarch relation were assessed using the Modified Huddart and Bodenham (MBH) index. Descriptive statistics, ANOVA, and the Chi-square test were used to compare mandibular dimensions and interarch relationships across the groups.</div></div><div><h3>Results</h3><div>A total of 52 patients (29 boys, 23 girls) were included in the study. Mandibular arch dimensions showed no significant differences across groups (<em>P</em> <!-->&gt;<!--> <!-->0.05), with inter-canine (Grayson: 26.31<!--> <!-->mm, Dynacleft: 27.42<!--> <!-->mm, OrthoAligner: 28.27<!--> <!-->mm, no-NAM: 27.15<!--> <!-->mm), anterior arch (33.36–33.50<!--> <!-->mm), inter-molar (36.50–36.77<!--> <!-->mm), and posterior arch widths (42.36–42.61<!--> <!-->mm). Crossbite and interarch occlusal relationships showed comparable distribution among all groups, with no significant variations (<em>P</em> <!-->&gt;<!--> <!-->0.05).</div></div><div><h3>Conclusion</h3><div>The study found no significant differences in mandibular transverse arch dimensions or inter arch occlusal relationships among different PSIO modalities, indicating that the choice of PSIO modality did not substantially impact arch width or occlusion interarch relation.</div></div>","PeriodicalId":45449,"journal":{"name":"International Orthodontics","volume":"23 4","pages":"Article 101013"},"PeriodicalIF":1.8,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143894601","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 feldspathic veneer surface treatments on colour stability after debonding of orthodontic brackets: An in vitro study","authors":"Flavio Copello ,&nbsp;Kevin Barnes ,&nbsp;Cecilia Sued Leao ,&nbsp;Jasmine Hariri ,&nbsp;Proma Ahmed ,&nbsp;Guilherme Anziliero Arossi ,&nbsp;Eduardo Franzotti Sant’Anna","doi":"10.1016/j.ortho.2025.101011","DOIUrl":"10.1016/j.ortho.2025.101011","url":null,"abstract":"<div><h3>Objectives</h3><div>To analyse the colour stability of feldspathic porcelain veneers treated with different surface preparation methods after bonding and debonding orthodontic brackets.</div></div><div><h3>Material and methods</h3><div>Twenty-five feldspathic porcelain veneers samples were divided into groups according to surface treatment procedures: (S) glaze-layer retained; (SHF) hydrofluoric acid etch; (SOXA) sandblasting; (SB) diamond burs; (C) control. Specimens were primed using silane and brackets were bonded. After removal of brackets, colour stability (NBS score National Bureau of Standards Score) was determined following coffee staining for 21 days. Group comparisons at each time point (T0 and T1) were performed using one-way ANOVA, followed by Tukey's HSD test for pairwise comparisons when a significant difference was detected. To evaluate the effect of time within each surface treatment group (T0 vs. T1), a paired <em>t</em>-test was performed.</div></div><div><h3>Results</h3><div>No significant interclass difference was identified between overall colour stability for the four test groups (S, SHF, SOXA and SB). All test groups showed a statistically significant increase in colour change compared to the control.</div></div><div><h3>Conclusions</h3><div>Surface treatment resulted in a significant decrease in colour stability with no statistical difference between treatments. Regardless of surface preparation method, bonding and debonding of orthodontic bracket results in decreased colour stability of feldspathic porcelain veneers.</div></div>","PeriodicalId":45449,"journal":{"name":"International Orthodontics","volume":"23 4","pages":"Article 101011"},"PeriodicalIF":1.8,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882557","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":"Comparative evaluation of novel framework-supported 3-dimensional facial scanning using smartphone device with freehand facial scanning in patients seeking orthodontic treatment: A cross-sectional study","authors":"Aditya Talwar ,&nbsp;Isha Duggal ,&nbsp;Harpreet Grewal ,&nbsp;Neha Bhutiani ,&nbsp;Navneet Singh ,&nbsp;Saurabh Kaushik","doi":"10.1016/j.ortho.2025.101012","DOIUrl":"10.1016/j.ortho.2025.101012","url":null,"abstract":"<div><h3>Introduction</h3><div>Surface anthropometric assessment of soft tissues is an ideal approach for measuring 3D facial changes with smartphone/tablet-based applications revolutionizing 3D facial acquisition. However, the scans obtained are prone to distortion and have limited repeatability due to the freehand recording of the scans in continuous image capture mode, thus also reducing their reliability. The aim was to introduce the design and operation of an innovative apparatus for acquiring 3D facial scans in a standardised, repeatable, and convenient way for young children and adults.</div></div><div><h3>Material and methods</h3><div>The apparatus presents a framework with a straight and scissor arm with the recommended dimension of 68<!--> <!-->×<!--> <!-->60<!--> <!-->×<!--> <!-->34<!--> <!-->cm with a 360-degree rotatory joint similar to wall-mounted X-ray systems used in dental offices. Facial scans of 15 patients aged between 19–25 years (mean age<!--> <!-->=<!--> <!-->23.13 years) were recorded using the two techniques (framework-supported [SF] and freehand [SWF]) Scandy Pro app in Apple iPad Pro. The scans were exported in .stl format and analysed using Meshlab and Viewbox 4 software for surface comparison, scan time, and mean absolute distance (MAD) between facial soft tissue landmarks.</div></div><div><h3>Results</h3><div>Scans using the framework (SF) showed fewer aberrations, especially in the nasolabial and periorbital areas. Zygoma R and L (0.608<!--> <!-->±<!--> <!-->1.605 and 0.503<!--> <!-->±<!--> <!-->1.191 respectively) displayed the most difference, while Point A (0.323<!--> <!-->±<!--> <!-->1.381), Pogonion (0.364<!--> <!-->±<!--> <!-->1.344), and infraorbital region R and L (0.307<!--> <!-->±<!--> <!-->0.785 and 0.362<!--> <!-->±<!--> <!-->1.089 respectively) displayed the least. With no scan interruptions, the average scan time decreased threefold to 10.14<!--> <!-->seconds for SF compared to 27.81<!--> <!-->seconds for SWF, with 12 instances of tracking loss. Superimposition analysis of SF scans shows ICC values from 0.574 to 0.882, indicating good agreement.</div></div><div><h3>Conclusion</h3><div>The proposed framework provides a reliable, accurate, and cost-effective alternative for 3D facial imaging using smartphone devices. It demonstrates high reproducibility and significant reductions in scan time and tracking loss. This apparatus could facilitate the routine clinical use of 3D facial scanning in orthodontics, offering portable and non-invasive solutions.</div></div>","PeriodicalId":45449,"journal":{"name":"International Orthodontics","volume":"23 3","pages":"Article 101012"},"PeriodicalIF":1.8,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869656","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":"Evaluation of optimal parameters for the insertion of mini-implants at the mandibular ramus region based on cone-beam computed tomography","authors":"Qi Fan,&nbsp;Shangyou Wen,&nbsp;Xuechun Yuan,&nbsp;Xian He,&nbsp;Fan Jian,&nbsp;Yan Wang,&nbsp;Wenli Lai,&nbsp;Hu Long","doi":"10.1016/j.ortho.2025.101005","DOIUrl":"10.1016/j.ortho.2025.101005","url":null,"abstract":"<div><h3>Objective</h3><div>To determine the optimal parameters for mini-implant placement in the mandibular ramus.</div></div><div><h3>Material and methods</h3><div>Measurements were conducted on CBCT data from 50 subjects, covering five planes (OP2, OP4, OP6, OP8 and OP10), each with six sites (Site0, Site2, Site4, Site6, Site8 and Site10), and each site with five insertion angles (30°, 60°, 90°, 120°, and 150°). The data included measurements of bone depth, cortical bone thickness, canal distance, and the probability of molar interference.</div></div><div><h3>Results</h3><div>The bone volume of the mandibular ramus is sufficient for placing orthodontic mini-implants. When mini-implants were implanted at appropriate heights, sites, and angles, contact with the mandibular nerve canal and interference with maxillary molars can be avoided.</div></div><div><h3>Conclusions</h3><div>Suitable insertion height was 4–8<!--> <!-->mm above the occlusal plane. Suitable insertion site was 4–8<!--> <!-->mm medial to the external oblique ridge. Suitable insertion angle was 120–150 degrees with the anterior surface of the mandibular ramus platform.</div></div>","PeriodicalId":45449,"journal":{"name":"International Orthodontics","volume":"23 3","pages":"Article 101005"},"PeriodicalIF":1.8,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869649","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":"Different treatment strategies for monozygotic twins with Class II division 1 malocclusion: 10-year follow-up study","authors":"Shichao Yue ,&nbsp;Minjia Zhu ,&nbsp;Xianju Xie ,&nbsp;Zixiang Dai ,&nbsp;Kan Yu ,&nbsp;Xiaoxia Che ,&nbsp;Ye Chen ,&nbsp;Yuxing Bai ,&nbsp;Ke Zhang","doi":"10.1016/j.ortho.2025.101009","DOIUrl":"10.1016/j.ortho.2025.101009","url":null,"abstract":"<div><h3>Background</h3><div>Early-stage growth modification has been demonstrated effective in treating prepubertal patients with Class II division 1 malocclusion. Since monozygotic twins are genetically identical, environmental factors, including oral habits and treatment strategies, may contribute to different treatment outcomes. To date, few reported comparisons of different treatment strategies in monozygotic twins with Class II division 1 malocclusion exist.</div></div><div><h3>Case description</h3><div>In this case report, we compare the effects of different functional appliances and extraction strategies in a pair of prepubertal monozygotic twins. Different compliance and treatment protocols may have different effects on their early changes in facial profile. Customized treatment plans are necessary for optimal treatment outcomes. Both twins achieved favourable improvements in facial profile, and their long-term stability of functional occlusion was also maintained after a ten-year follow-up.</div></div><div><h3>Practical implications</h3><div>With the outcome of the case, we acknowledged that functional appliance therapy can affect the potentiality of mandibular growth. Individualized protocols should be approached aside from different functional appliances.</div></div>","PeriodicalId":45449,"journal":{"name":"International Orthodontics","volume":"23 3","pages":"Article 101009"},"PeriodicalIF":1.8,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864325","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}