The Angle orthodontist最新文献_第3页

Bracket transfer accuracy of two three-dimensionally printed lingual indirect bonding trays with different bracket frame designs. 两种不同支架框架设计的三维印刷舌形间接粘接托盘的支架传递精度。

IF 3.2

The Angle orthodontist Pub Date : 2026-06-18 DOI: 10.2319/101625-864.1

Natasa Suvajac, Linus Hötzel, Lea Hoffmann, Andreas Keßler, Andrea Wichelhaus, Hisham Sabbagh

{"title":"Bracket transfer accuracy of two three-dimensionally printed lingual indirect bonding trays with different bracket frame designs.","authors":"Natasa Suvajac, Linus Hötzel, Lea Hoffmann, Andreas Keßler, Andrea Wichelhaus, Hisham Sabbagh","doi":"10.2319/101625-864.1","DOIUrl":"https://doi.org/10.2319/101625-864.1","url":null,"abstract":"Objectives: To compare bracket transfer accuracy of two three-dimensionally (3D) printed indirect bonding tray designs for lingual indirect bonding.Materials and methods: Virtual bracket placement was performed using OnyxCeph (OnyxCeph 3D Lab, Chemnitz, Germany). Tray design 1 was designed with a low bracket frame, while tray design 2 was designed with a high bracket frame. A total of 30 bonding trays and corresponding dental models were additively manufactured, 15 per design. After indirect bonding, achieved bracket positions were scanned. Linear and angular transfer errors were assessed. Statistical analysis of mean transfer errors and frequency of clinically acceptable errors (defined as < 0.5 mm and < 2°) were performed using Mann-Whitney U-test and χ2 test.Results: Both tray designs demonstrated comparable transfer accuracy. Linear, tip, and rotation errors were mostly within clinical limits. All linear values were acceptable, except for vertical dimension in the incisors (98.3%). Rotation accuracy was high across all tooth groups (78.9-100%). Torque showed the greatest deviations, with only 11.9% of incisor brackets in the high-frame and 75.4% in the low-frame groups within acceptable limits. Overall, torque consistently had the lowest rate of clinically acceptable outcomes across both tray designs.Conclusions: Considering favorable transfer accuracy and improved handling characteristics of the low-frame tray design, its clinical application may be preferred. However, achieving high accuracy in the torque dimension remains a challenge with 3D-printed indirect bonding trays.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148280552","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

Biomechanical impact of beveling design on extrusion of a maxillary canine and a maxillary first molar: an in vitro and finite element analysis study. 斜面设计对上颌尖牙和第一磨牙挤压的生物力学影响：体外和有限元分析研究。

IF 3.2

The Angle orthodontist Pub Date : 2026-06-18 DOI: 10.2319/100525-832.1

Flavio Traversa, Pascal Vollenweider, Damiano Salvatori, Eren Korunmuş

{"title":"Biomechanical impact of beveling design on extrusion of a maxillary canine and a maxillary first molar: an in vitro and finite element analysis study.","authors":"Flavio Traversa, Pascal Vollenweider, Damiano Salvatori, Eren Korunmuş","doi":"10.2319/100525-832.1","DOIUrl":"https://doi.org/10.2319/100525-832.1","url":null,"abstract":"Objectives: To investigate the effect of beveling side (apical vs occlusal) on the extrusive biomechanics of clear aligners compared to unbeveled attachments when tracking issues occur.Materials and methods: An in vitro Orthodontic Force Simulator (OFS) was used to simulate extrusion of a maxillary canine and first molar. Three attachment designs (beveled apical, beveled occlusal, and conventional rectangular) were digitally designed on the target teeth and directly milled in zirconia material. Aligners were thermoformed for each design and target tooth. The tooth-aligner mismatch was created on the target tooth up to 1.0 mm to simulate the tracking issue. Finite Element Analysis (FEA) was conducted to simulate the OFS experiment and analyze stress distribution and deformation.Results: The attachment designs yielded significant differences in extrusion forces and bucco-palatal moments on both teeth. Beveled apical attachments consistently produced the lowest forces and moments, especially as displacement increased. This was attributed to a sliding motion of the aligner along the tooth movement path, mitigating the negative effects of tracking errors. Rectangular and beveled occlusal attachments, while offering strong initial engagement, resulted in higher stress concentrations and variability in force delivery as the simulated aligner-tooth mismatch grew.Conclusions: The beveled apical design provides more predictable and consistent extrusion forces, reducing unwanted side effects, particularly for large movements and high risk of tracking issues.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148280536","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 resin-modified glass ionomer vs composite bonding agents for orthodontic bonding: a single-center randomized controlled trial. 树脂改性玻璃离聚体与复合粘结剂在正畸粘结中的有效性：一项单中心随机对照试验。

IF 3.2

The Angle orthodontist Pub Date : 2026-06-15 DOI: 10.2319/112025-967.1

Emil Östlund, Rage Abdullahi Ossoble, Damir Malmvind, Andrea Merzo, Ronny Rukiqi, Muteb Algharbi, Anders Magnuson, Farhan Bazargani

{"title":"Effectiveness of resin-modified glass ionomer vs composite bonding agents for orthodontic bonding: a single-center randomized controlled trial.","authors":"Emil Östlund, Rage Abdullahi Ossoble, Damir Malmvind, Andrea Merzo, Ronny Rukiqi, Muteb Algharbi, Anders Magnuson, Farhan Bazargani","doi":"10.2319/112025-967.1","DOIUrl":"10.2319/112025-967.1","url":null,"abstract":"Objectives: To compare the incidence of bond failures and white spot lesions (WSLs) between brackets bonded with either light-cured resin-modified glass ionomer cement (GC Fuji Ortho LC) or light-cured composite resin (3M Transbond Plus Color Change Adhesive) after 18 months of treatment.Materials and methods: 90 patients were allocated to the trial, and 84, with a mean age of 16.7 ± 2.6 years, were analyzed. The cross-mouth method was employed in each patient, in which two diagonal quadrants (e.g., upper right and lower left, or vice versa) were randomly assigned to the FujiOrtho group, and the opposite diagonal quadrants to the Transbond group. All patients were monitored for an average of 18 months for bond failure and WSL incidence. Multilevel mixed Poisson regression with robust standard errors was used to compare the groups.Results: Overall, failure rates were 12.9% in the FujiOrtho group and 2.1% in the Transbond group, with an adjusted relative risk (aRR) of 6.21 (95% CI: 3.89-9.94), adjusted for age, sex, maxilla/mandible, tooth position, and treating orthodontist. Overall, WSL incidence was 8.3% in the FujiOrtho group and 8.8% in the Transbond group, with an aRR of 0.95 (95% CI: 0.80-1.13).Conclusions: Transbond Plus demonstrated a significantly lower bond failure rate compared to GC FujiOrtho LC, with a 3.6 times reduced risk of bracket failure. There were neither statistically nor clinically significant differences in the incidence of WSLs between the two groups.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148267690","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

Plastic deformation evaluation of clear aligners exposed to different cleaning solutions. 暴露于不同清洁溶液的清洁对准器的塑性变形评价。

IF 3.2

The Angle orthodontist Pub Date : 2026-06-12 DOI: 10.2319/102425-879.1

Paula Cristina Henriques da Silva, Tony Vieira Faria, Lucas David Galvani, Luiz Gonzaga Gandini, Ary Dos Santos-Pinto, Luís Geraldo Vaz, Jonas Bianchi

{"title":"Plastic deformation evaluation of clear aligners exposed to different cleaning solutions.","authors":"Paula Cristina Henriques da Silva, Tony Vieira Faria, Lucas David Galvani, Luiz Gonzaga Gandini, Ary Dos Santos-Pinto, Luís Geraldo Vaz, Jonas Bianchi","doi":"10.2319/102425-879.1","DOIUrl":"https://doi.org/10.2319/102425-879.1","url":null,"abstract":"Objectives: To evaluate the effect of different antimicrobial solutions on the mechanical properties of aligners (Invisalign, Align Technology Inc., San Jose, CA, USA).Material and methods: Invisalign aligners were used, originating from an orthodontic treatment sequence to correct malocclusion in the upper arch. Specimens were obtained from the buccal surfaces extending from the upper right canine to the second molar and used for mechanical testing (n = 60). The test specimens were divided into seven groups: 0.5% sodium hypochlorite (HYP); sodium bicarbonate (BIC); neutral detergent (DET); 0.12% chlorhexidine digluconate (CX); white vinegar (VIN); Corega tabs (COR) and distilled water (DW) (control).Results: After 7 days, significant intergroup differences in Young's modulus were observed, with HYP differing from DW and DET (P < .05). After 14 days, a significant difference was observed between CX and COR (P < .05). Significant changes related to immersion time were detected for DET, CX, and COR between 7 and 14 days (P < .05). No statistically significant differences were found in the maximum deformation values for any solution (P > .05).Conclusions: Stiffness of the materials was influenced by immersion in different solutions, with specific intergroup differences observed after 7 and 14 days. Significant changes over time were detected for DET, CX, and COR. However, immersion in the evaluated solutions did not significantly affect maximum deformation of the material.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148229951","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

Quantitative evaluation of an artificial intelligence-driven remote monitoring system for occlusion assessment using patient-captured images. 使用患者捕获的图像对人工智能驱动的闭塞评估远程监测系统进行定量评估。

IF 3.2

The Angle orthodontist Pub Date : 2026-06-02 DOI: 10.2319/010926-30.1

Daniel Bills, Barry Benton, William Dabney, Terry A Sellke

{"title":"Quantitative evaluation of an artificial intelligence-driven remote monitoring system for occlusion assessment using patient-captured images.","authors":"Daniel Bills, Barry Benton, William Dabney, Terry A Sellke","doi":"10.2319/010926-30.1","DOIUrl":"10.2319/010926-30.1","url":null,"abstract":"Objectives: To evaluate the accuracy of an artificial intelligence (AI) model developed by DentalMonitoring for assessing occlusal parameters from patient-acquired intraoral images, using intraoral scanner (IOS)-derived three-dimensional (3D)measurements as the reference standard.Materials and methods: This multicenter prospective study included 430 orthodontic patients from three clinics in the United States. Each participant completed a DentalMonitoring scan using the DM ScanBox and a clinician-acquired IOS scan. Midline deviation, overbite, overjet, and canine class were measured on IOS-generated 3D models using metrology-grade software (ZEISS Inspect). Three independent, blinded technicians performed measurements, with the median value used as the reference. Agreement between AI-generated and reference measurements was assessed using Passing-Bablok regression and relative bias analyses at predefined clinical thresholds.Results: All occlusal parameters demonstrated agreement within clinically acceptable limits. Midline deviation and overbite showed the highest concordance, with intercepts near 0.00 mm, relative biases below 3%, and mean biases of -0.01 ± 0.26 mm and -0.04 ± 0.39 mm, respectively. Overjet was modestly overestimated (mean bias = +0.29 ± 0.52 mm), while canine class showed increasing underestimation at higher values (mean bias = -0.31 ± 0.91 mm).Conclusions: The evaluated AI model demonstrated high agreement with IOS-based 3D measurements for midline deviation and overbite, with greater variability for overjet and canine classification. These results support the use of AI-assisted monitoring for screening and follow-up, while highlighting the need for further validation prior to routine clinical implementation.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13692929/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148145468","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}

引用次数: 0

Biomechanical effects of overcorrection design on extraction space closure with clear aligners: a finite element analysis. 过度矫正设计对透明矫正器拔牙间隙闭合的生物力学影响：有限元分析。

IF 3.2

The Angle orthodontist Pub Date : 2026-05-27 DOI: 10.2319/082925-732.1

Yana Wen, Zhihang Song, Yifan Wang, Chen Zhang, Guanyin Zhu, Zhihe Zhao

{"title":"Biomechanical effects of overcorrection design on extraction space closure with clear aligners: a finite element analysis.","authors":"Yana Wen, Zhihang Song, Yifan Wang, Chen Zhang, Guanyin Zhu, Zhihe Zhao","doi":"10.2319/082925-732.1","DOIUrl":"10.2319/082925-732.1","url":null,"abstract":"Objectives: To evaluate the biomechanical effects of counterclockwise overcorrection design on extraction space closure with clear aligners (CAs) using finite element analysis (FEA).Materials and methods: A maxillary first premolar extraction model with attachments and CAs was constructed from cone beam computed tomography and intraoral scan data. Counterclockwise anterior overcorrection was simulated as a two-factor design: (1) overcorrection, ranging from 0° to 5°, applied at a fixed position, and (2) overcorrection applied at five different positions with a constant magnitude of 3°. Tooth displacements were analyzed to assess sagittal, vertical, and transverse biomechanical responses.Results: Without overcorrection, space closure exhibited characteristic excessive tipping toward the extraction site, including anterior torque loss, posterior mesial tipping, and unfavorable vertical displacements. Overcorrection of 1°-4° substantially mitigated these effects, improving torque control and vertical stability, whereas ≥ 5° compromised space closure efficiency. The position of the overcorrection axis significantly influenced the movement patterns of canines and second premolars. With 3° of overcorrection positioned anteriorly, canines exhibited extrusive movement whereas second premolars showed intrusive movement. Conversely, when overcorrection was positioned posteriorly, canines underwent intrusive movement and second premolars exhibited extrusive movement, with further reduced sagittal tipping angles.Conclusions: Overcorrection in clear aligner therapy functions biomechanically like V-bends in conventional archwires, counteracting excessive tipping toward the extraction site during extraction space closure. The biomechanical outcome is sensitive to the degree and position of overcorrection, highlighting the need for individualized overcorrection strategies.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13693011/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148451142","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}

引用次数: 0

Contributions of anterior and posterior components of cranial flexure on skeletal classification: a cone-beam computed tomography study. 颅屈曲的前后组成部分对骨骼分类的贡献：锥束计算机断层扫描研究。

IF 3.2

The Angle orthodontist Pub Date : 2026-05-27 DOI: 10.2319/070925-569.1

Andrew Ng, Valmy Pangrazio-Kulbersh, Riyad Al-Qawasmi, Richard Kaczynski

{"title":"Contributions of anterior and posterior components of cranial flexure on skeletal classification: a cone-beam computed tomography study.","authors":"Andrew Ng, Valmy Pangrazio-Kulbersh, Riyad Al-Qawasmi, Richard Kaczynski","doi":"10.2319/070925-569.1","DOIUrl":"10.2319/070925-569.1","url":null,"abstract":"Objectives: To evaluate the relationship between skeletal classification and the anterior and posterior components of cranial base flexure and glenoid fossa position.Materials and methods: Pretreatment cone-beam computed tomography records of 420 patients were stratified by sex, age, and skeletal classification based on standards for maxillomandibular differential for age-specific patients. Cephalometric measurements (Basion, Nasion, superior aspect of glenoid fossa) were recorded, and their angular deviation, horizontal, and vertical distance from Sella were measured using a 7° constructed plane (H-P) from S-N as a reference. Results were analyzed using regression analysis and analysis of variance, along with intraclass correlation coefficient for reliability.Results: Cranial base flexure was found to be significantly smaller in Class III individuals than Class I or II, due to a larger deflection in posterior cranial base angle from the horizontal plane. The position of Basion relative to Sella was also noted to have a significantly shorter horizontal and significantly longer vertical length in these same individuals. The position of the glenoid fossa showed that Class II patients tended to have a more posterior horizontal displacement from Sella when than those in Class I or III. All measurements, except for cranial base flexure, were significantly larger in males than females. Statistical significance was measured at P < .05.Conclusions: Cranial base angle is significantly smaller in Class III individuals, due to an anteriorly positioned posterior cranial base. The posterior position of the glenoid fossa appears to contribute to the anteroposterior position of the condyle in Class II patients.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13693032/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148045369","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}

引用次数: 0

The effect of anterior bite turbos on pulpal blood flow and mobility of the lower central incisors and pain perception. 前牙合对牙髓血流量、下中切牙活动能力及痛觉的影响。

IF 3.2

The Angle orthodontist Pub Date : 2026-05-27 DOI: 10.2319/090325-743.1

Rawan Sotal, Kazem Al-Nimri, Nessrin Taha

{"title":"The effect of anterior bite turbos on pulpal blood flow and mobility of the lower central incisors and pain perception.","authors":"Rawan Sotal, Kazem Al-Nimri, Nessrin Taha","doi":"10.2319/090325-743.1","DOIUrl":"10.2319/090325-743.1","url":null,"abstract":"Objectives: To evaluate the biological response of mandibular central incisors to anterior bite turbos (ABTs) during fixed orthodontic treatment, focusing on pulpal blood flow (PBF), tooth mobility, and pain perception.Materials and methods: Fifty-five patients undergoing fixed appliance therapy were assigned to two groups: an experimental group (n = 29) and a control group (n = 26). All received 0.014-inch nickel-titanium arch wires. ABTs were bonded to the palatal surfaces of the maxillary central incisors in the experimental group. Lower incisor PBF was measured using laser Doppler flowmetry at baseline, 20 minutes, 1 week, and 1 month after bonding. Tooth mobility was recorded after 1 month using the Miller Index. Pain was assessed using a 10-cm Visual Analogue Scale over 7 days.Results: PBF declined after 1 week in both groups and recovered after 1 month, with no significant differences between groups (P > .05). Tooth mobility was significantly greater in the bite turbo group (P < .001), with 74.1% of patients showing Grade 2 mobility compared with 25% in the control group. Pain peaked within 24 hours and declined significantly by day 7 (P < .001) in both groups, with no significant between-groups differences.Conclusions: ABTs do not adversely affect pulpal circulation or pain perception. The increase in tooth mobility in the bite turbo group is a normal adaptive response and remains within safe clinical limits. Using ABTs to correct deep overbite is biologically safe.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13693004/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148045385","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}

引用次数: 0

Assessment of different direct printed aligner resins for leaching of urethane dimethacrylate: an in vivo study. 评估不同的直接印刷对准树脂对二甲基丙烯酸氨基甲酸乙酯浸出：一项体内研究。

IF 3.2

The Angle orthodontist Pub Date : 2026-05-21 DOI: 10.2319/092225-788.1

Aswathi Selvaraj, Deepak Prabhu, Balaji Krishnan, Parameswaran Tm, Mahalakshmi Krishnakumaran, Mohan Kumar

{"title":"Assessment of different direct printed aligner resins for leaching of urethane dimethacrylate: an in vivo study.","authors":"Aswathi Selvaraj, Deepak Prabhu, Balaji Krishnan, Parameswaran Tm, Mahalakshmi Krishnakumaran, Mohan Kumar","doi":"10.2319/092225-788.1","DOIUrl":"10.2319/092225-788.1","url":null,"abstract":"Objectives: To evaluate the release of urethane dimethacrylate (UDMA) from the direct printed aligners using Tera Harz TC-85 resin (Graphy, Seoul, Korea) and Clear A resin (Senertek, Türkiye) in saliva samples at different time intervals.Materials and methods: This prospective quasiexperimental study included 2 groups: Group A Tera Harz TC-85 (Graphy, Seoul, Korea) and Group B Clear A resin (Senertek, Izmir, Türkiye), each with 13 participants. Patients wore aligners for more than 20 hours a day for 14 days. Whole saliva samples were obtained at several time intervals: T0 before aligners were inserted and T1, T2, and T3 after 24 hours, 7 days, and 14 days of usage, respectively. High-performance liquid chromatography was used to analyze the samples, and the average results were computed.Results: Results showed significant variations in UDMA leaching between groups A and B at all postintervention periods. Group B had a significantly greater mean UDMA release than Group A at T1, T2, and T3. Intragroup analysis revealed time-dependent increases in UDMA release in both groups.Conclusions: The findings revealed significant differences in UDMA release rates between the two materials, with Tera Harz TC-85 consistently showing lower levels of leaching than Clear A resin over the 14-day study period. Tera Harz TC-85 has superior performance in minimizing UDMA leaching, while both materials maintained acceptable profiles under the study conditions.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13692982/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147984892","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}

引用次数: 0

Comparison of outcomes in adolescents treated with aligners versus fixed appliances. 青少年用矫正器与固定矫治器治疗的结果比较。

IF 3.2

The Angle orthodontist Pub Date : 2026-05-19 DOI: 10.2319/100725-841.1

Dayton S Oki, Burcu Bayirli, Cameron L Randall, Lloyd A Mancl, Greg J Huang

{"title":"Comparison of outcomes in adolescents treated with aligners versus fixed appliances.","authors":"Dayton S Oki, Burcu Bayirli, Cameron L Randall, Lloyd A Mancl, Greg J Huang","doi":"10.2319/100725-841.1","DOIUrl":"10.2319/100725-841.1","url":null,"abstract":"Objectives: To compare treatment efficacy and efficiency, presence and extent of new white spot lesions (WSL), and quality of life in adolescent patients treated with aligners vs fixed appliances (FA) in an academic clinic.Materials and methods: This cohort study included 29 adolescents (18 male and 11 female; mean age: 14) treated with aligners who were matched with 29 adolescents treated with FA. Pretreatment characteristics were collected, and consented subjects completed a modified OHIP-14 (Oral Health Impact Profile) questionnaire. Treatment efficacy was assessed comparing the peer-assessment rating (PAR) and efficiency was assessed comparing emergency visits, debonded appliances, appointments, and treatment time. Maxillary incisors were assessed for presence and extent of new WSLs.Results: Both groups had similar demographic, pretreatment parameters, post-treatment PAR scores, and treatment time, while having a trend for less debonded appliances in the aligner group (P = .07). However, aligner patients had significantly less appointments (mean A = 15.7 vs FA = 21.3 visits; P < .001), emergency visits (mean A = 0.4 vs FA = 1.0 visits; P = .01), new or larger WSLs (P = .021), and oral hygiene counselling (mean A = 0.9 vs FA = 3.2 times; P = .006). The two groups also had similar OHIP-14 scores, but only 26% of aligner patients reported interruption of meals vs 70% of FA patients (P = .015).Conclusions: Both groups had similar PAR outcomes and treatment times. However, aligner patients had fewer emergency visits, appointments, debonded appliances, new or larger WSLs, and interruption of meals compared to FA patients.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":3.2,"publicationDate":"2026-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147978295","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