The Angle orthodontist最新文献_第3页

Effects of chemotherapeutic vs regular toothpastes on dental plaque and gingival inflammation in orthodontic patients with fixed appliances: a systematic review and meta-analysis. 化疗与普通牙膏对固定矫治器正畸患者牙菌斑和牙龈炎症的影响：一项系统回顾和荟萃分析。

The Angle orthodontist Pub Date : 2025-04-18 DOI: 10.2319/071824-573.1

Yinli Liu, Cees Valkenburg, Ronald Edwin Gaston Jonkman, Dagmar Else Slot

{"title":"Effects of chemotherapeutic vs regular toothpastes on dental plaque and gingival inflammation in orthodontic patients with fixed appliances: a systematic review and meta-analysis.","authors":"Yinli Liu, Cees Valkenburg, Ronald Edwin Gaston Jonkman, Dagmar Else Slot","doi":"10.2319/071824-573.1","DOIUrl":"https://doi.org/10.2319/071824-573.1","url":null,"abstract":"Objectives: To analyze, appraise, and synthesize papers in which authors have compared the effects of chemotherapeutic toothpaste (CTP) and regular toothpaste (RTP) on plaque scores (PSs), gingival scores (GSs), and bleeding scores (BSs) in orthodontic patients wearing fixed appliances (FAs).Materials and methods: PubMed-MEDLINE, Cochrane-CENTRAL, and Embase databases were searched with predefined search terms until April 2024 for controlled or randomized controlled clinical trials aligning with the aim. In the eligible papers, risk of bias was evaluated, data of interest were extracted, and a descriptive analysis was performed. If possible, meta-analyses and subanalyses on specific factors were conducted. The quality of evidence and strength of the recommendation were rated.Results: In our search and selection, we obtained five papers describing eight comparisons. Potential risk of bias was assessed as some concerns to high, and heterogeneity was considered substantial. Descriptive analysis revealed no significant difference in PS and BS, with an improvement in GS favoring CTP. Meta-analyses of the end scores showed CTP significantly reduced PS (standardized mean difference [SMD] = -0.26; 95% confidence interval [CI] = -0.52, -0.01; P = .04). However, no significant effects were observed on GS and BS. These findings were supported by the subanalyses on CTP with chlorhexidine (CHX; PS: mean difference [MD] = -5.12; 95% CI = -10.08, -0.15; P = .04). The quality of evidence was graded as very low, and strength of the recommendation was judged as very weak.Conclusions: For orthodontic patients with FAs, very weak certainty exists in recommending CTP (eg, with CHX) over RTP for use with toothbrushing. CTP may have a very small effect on PS and a small effect on GS.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144045026","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

Rotational fulcrum and dentoskeletal changes after rapid palatal expansion with tooth-bone-borne (MARPE) and tooth-borne appliances in post-pubertal patients. 青春期后患者使用牙骨辅助器具快速腭扩张后旋转支点和牙骨骼的变化。

The Angle orthodontist Pub Date : 2025-04-17 DOI: 10.2319/111224-931.1

Luciana Quintanilha Pires Fernandes, Giselle Naback Lemes Vilani, Bruno de Paula Machado Pasqua, Cristiane Barros André, Jonas Capelli

{"title":"Rotational fulcrum and dentoskeletal changes after rapid palatal expansion with tooth-bone-borne (MARPE) and tooth-borne appliances in post-pubertal patients.","authors":"Luciana Quintanilha Pires Fernandes, Giselle Naback Lemes Vilani, Bruno de Paula Machado Pasqua, Cristiane Barros André, Jonas Capelli","doi":"10.2319/111224-931.1","DOIUrl":"https://doi.org/10.2319/111224-931.1","url":null,"abstract":"Objectives: To identify the rotational fulcrum (RF) and to evaluate the skeletal and dentoalveolar effects after rapid palatal expansion (RPE) with tooth-borne and tooth-bone-borne (MARPE) appliances.Materials and methods: 31 patients were selected (MARPE group: n = 14, age 16.2 ± 2 years; hyrax group: n = 17, age 14.7 ± 0.8 years) with RPE indication and having cone-beam computed tomography before (T1) and after RPE (T2) and after 6 months of retention (T3).Results: In the MARPE group, the RF was at or above the frontozygomatic suture (FZS), whereas in the hyrax group, it was at or below the FZS. The skeletal response rates were 70% (2°) and 33% (1.09°); alveolar response rates, 18% (0.52°) and 20% (0.68°); and dental response rates, 12% (0.35°) and 47% (1.54°) in the MARPE and hyrax groups, respectively, with a significant difference between groups in skeletal (P = .005) and dental (P < .001) regions. After retention, no significant difference was found between groups.Conclusions: Although MARPE resulted in a higher RF in the coronal view, both techniques effectively corrected transverse discrepancies with similar stability. Considering the between-group differences in relation to skeletal and dentoalveolar response, MARPE should be used for cases in which minimal compensatory tooth movement is desired.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144031837","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

Accuracy and reliability of automated landmark identification and cephalometric measurements on cone beam computed tomography using Invivo software. 使用Invivo软件的锥形束计算机断层扫描自动地标识别和头侧测量的准确性和可靠性。

The Angle orthodontist Pub Date : 2025-04-10 DOI: 10.2319/122324-1049.1

Young-Eun Jung, Heeyeon Suh, Joorok Park, Heesoo Oh

{"title":"Accuracy and reliability of automated landmark identification and cephalometric measurements on cone beam computed tomography using Invivo software.","authors":"Young-Eun Jung, Heeyeon Suh, Joorok Park, Heesoo Oh","doi":"10.2319/122324-1049.1","DOIUrl":"https://doi.org/10.2319/122324-1049.1","url":null,"abstract":"Objectives: To evaluate the accuracy and reliability of an automated landmark identification (ALI) system and the impact of ALI errors on cephalometric measurements on cone-beam computed tomography (CBCT) images.Materials and methods: Thirty-one landmarks were identified on 76 CBCT images using Invivo7 software (Anatomage, San Jose, Calif). Ground truth was established by averaging landmark coordinates from two calibrated human examiners. The accuracy of the ALI system was assessed by the mean absolute error (MAE, mm) across coordinate axes, the mean error distance (mm), and the successful detection rate (SDR) for each landmark. Interexaminer reliability between the ALI and manual landmark location was evaluated. Eighteen cephalometric measurements were computed from 25 landmarks. Accuracy of measurements from the ALI system was assessed with the MAE and successful measurement rates (SMR).Results: The ALI system closely matched human examiners in landmark identification, with an average MAE of 0.94 ± 0.99 mm. Across all three coordinate axes, 87% of the landmarks had <2 mm MAE. ALI average MAE for conventional linear and angular cephalometric measurements were 1.35 ± 1.33 mm and 0.89 ± 0.89 degrees, respectively. Only one measurement, Intercondylar Width, showed MAE >3 mm.Conclusions: The ALI system showed clinically acceptable accuracy and reliability for the majority of cephalometric landmarks and measurements. Clinicians are advised to critically evaluate ALI landmarks with substantial errors, to fully utilize the capabilities of commercial software effectively.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144050941","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

Parent perspectives on effective patient-provider communication during orthodontic consultations: a qualitative description study. 在正畸咨询过程中，家长对有效的医患沟通的看法：一项定性描述研究。

The Angle orthodontist Pub Date : 2025-03-28 DOI: 10.2319/062524-491.1

Codey Pilgrim, Paul W Major, Arnaldo Perez-Garcia, Carlos Flores-Mir

{"title":"Parent perspectives on effective patient-provider communication during orthodontic consultations: a qualitative description study.","authors":"Codey Pilgrim, Paul W Major, Arnaldo Perez-Garcia, Carlos Flores-Mir","doi":"10.2319/062524-491.1","DOIUrl":"https://doi.org/10.2319/062524-491.1","url":null,"abstract":"Objectives: To describe parent perspectives on effective patient-provider communication (PPC) during orthodontic consultations for their children.Materials and methods: Qualitative description guided the study design. Parents of children who recently underwent an orthodontic consultation and were fluent in English were purposefully selected. Interviews continued until data saturation was achieved. Data were analyzed using inductive, manifest thematic analysis.Results: Fifteen parents, including 10 females and five males, participated. Four themes were inductively developed. Parents attributed several characteristics to effective PPC, including inclusivity, clarity, honesty, and comprehensiveness's. Specifically, they emphasized the importance of involving children and staff members in the consultation process, delivering honest and justifiable diagnoses and treatment plans, and adopting a holistic approach that considered all phases of the therapeutic process and various dimensions such as tasks, finances, and relationships between patients and care providers.Conclusions: The findings underscore the significance of care provider-related factors in PPC. These findings also emphasize the need for a collaborative and inclusive approach between orthodontic patients and care providers to foster effective PPC. Subsequent researchers should delve into the perspectives of pediatric patients, particularly adolescents, and care providers regarding effective PPC.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143733659","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

Influence of attachment position and torque overcorrection on arch expansion in clear aligner treatment: a three-dimensional finite element analysis. 三维有限元分析：矫直器治疗中附着位置和矫直力矩对弓扩张的影响。

The Angle orthodontist Pub Date : 2025-03-20 DOI: 10.2319/061424-466.1

Ziwei Tang, Hu Long, Lu Liu, Wenli Lai, Fan Jian

{"title":"Influence of attachment position and torque overcorrection on arch expansion in clear aligner treatment: a three-dimensional finite element analysis.","authors":"Ziwei Tang, Hu Long, Lu Liu, Wenli Lai, Fan Jian","doi":"10.2319/061424-466.1","DOIUrl":"https://doi.org/10.2319/061424-466.1","url":null,"abstract":"Objectives: To investigate the influence of attachment position and torque overcorrection on stress distribution and tooth displacement trends during arch expansion in clear aligner therapy (CAT).Materials and methods: Dental and skeletal models were obtained from an adult volunteer with angle Class I and mild crowding. Attachments were designed on the buccal, lingual, and buccolingual surfaces of the first molar. Different overcorrection torques were designed on the first molar. The displacement and stress of the whole arch were analyzed using a three-dimensional finite element analysis model.Results: Crown buccal tipping was observed during arch expansion, while the lingual attachment showed more buccal crown and lingual root movement. Based on the trend of displacement, 1.5° of buccal root torque overcorrection without attachments could lead to bodily movement, 1.8° with a lingual attachment, 0.5° with a buccal attachment, and 0.9° with a buccolingual attachment.Conclusions: Arch expansion is primarily achieved by teeth tipping despite attachments placed on the buccal or lingual side of teeth in CAT. Appropriate overcorrection of buccal root torque could contribute to the achievement of bodily movement.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143665618","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

Accuracy and reliability of Keynote for tracing and analyzing cephalometric radiographs. Keynote用于追踪和分析头颅x线片的准确性和可靠性。

The Angle orthodontist Pub Date : 2025-03-18 DOI: 10.2319/101724-864.1

Ali K Hamad, Ferdinand M Machibya, Matilda M Mlangwa, David N Ngassapa

{"title":"Accuracy and reliability of Keynote for tracing and analyzing cephalometric radiographs.","authors":"Ali K Hamad, Ferdinand M Machibya, Matilda M Mlangwa, David N Ngassapa","doi":"10.2319/101724-864.1","DOIUrl":"https://doi.org/10.2319/101724-864.1","url":null,"abstract":"Objectives: To evaluate the reliability and accuracy of Keynote for tracing and analyzing cephalograms in comparison to Quick Ceph Studio.Materials and methods: This was a cross-sectional study, which utilized the lateral cephalometric digital images (radiographs) from 49 patients. The study site was the Dental Radiology unit in the School of Dentistry of the Muhimbili University of Health and Allied Sciences (MUHAS), in Dar es Salaam, Tanzania. Cephalograms were imported to Quick Ceph Studio and then to Keynote for analysis. Minimum, maximum, mean, standard deviation, and mean difference were used to describe the data. Agreement between the two techniques was assessed by the Bland-Altman plot, linear regression, and interexaminer reliability tests. A level of significance was considered at P < .05, and a 95% CI was estimated for the outcomes in the study groups.Results: The majority of the mean values obtained from Quick Ceph were greater (P < .05) than those obtained from Keynote. According to Bland-Altman plots, all measurements were within the limit of agreement except for only five linear variables. The interexaminer reliability test showed no agreement between the two instruments for all linear parameters except for the LAFH: TAFH, whereas all angular measurements revealed good to excellent agreement (ICC: 0.75 to 0.97) between the methods.Conclusions: The measurements obtained with the Keynote software were found to be clinically reliable since the limits did not exceed the maximum acceptable difference between the methods. The two software instruments were considered to be in agreement and can be used interchangeably.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143652799","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

Invisalign ClinCheck can predict open gingival embrasures in adult extraction cases: a pilot study. Invisalign ClinCheck可以预测成人拔牙病例中开放的牙龈囊膜：一项初步研究。

The Angle orthodontist Pub Date : 2025-03-18 DOI: 10.2319/091424-752.1

Feng Guo, Chenxu Wang, Lei Han, Houxuan Li, Lang Lei, Li Mei

{"title":"Invisalign ClinCheck can predict open gingival embrasures in adult extraction cases: a pilot study.","authors":"Feng Guo, Chenxu Wang, Lei Han, Houxuan Li, Lang Lei, Li Mei","doi":"10.2319/091424-752.1","DOIUrl":"https://doi.org/10.2319/091424-752.1","url":null,"abstract":"Objectives: To evaluate the accuracy of Invisalign ClinCheck in predicting open gingival embrasures (OGEs) and to identify predictors of OGEs in adult extraction cases.Materials and methods: Fifty-seven adult patients treated with Invisalign and four first premolar extractions were included in this retrospective study. OGEs were measured in maxillary and mandibular anterior regions using posttreatment intraoral photographs (actual OGEs) and the final step from the first treatment plan in ClinCheck (predicted OGEs). Prediction performance indicators including precision, sensitivity, specificity, false positive rate, false negative rate, and accuracy were evaluated at each tooth site. Predictors of OGEs (age, crowding, crown morphology, tooth movement, tooth site, treatment duration, and attachment design) were analyzed using binary logistic regression.Results: Incidence of actual OGEs was like that of the ClinCheck predicted OGEs in the maxillary and mandibular anterior regions. The predictability of ClinCheck was satisfactory in both the maxilla and mandible, with accuracy rates of 94.0% and 86.0%, respectively. The most accurate prediction was for the maxillary central incisors, achieving a precision of 100% and an accuracy of 96.6%. The most significant predictors of OGEs included patient age at initial consultation, anterior crowding, tooth crown morphology, and type of tooth movement.Conclusions: Invisalign ClinCheck predicted OGEs in adult patients treated with four premolar extractions. The accuracy of the prediction was satisfactory, 94% in the maxilla and 86% in the mandible, demonstrating great potential for clinical application.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143652805","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

The effect of clear aligner and fixed orthodontic treatment on the development of pulp stones: a retrospective observational study. 透明矫正器和固定正畸治疗对牙髓结石发展的影响：一项回顾性观察研究。

The Angle orthodontist Pub Date : 2025-03-12 DOI: 10.2319/091824-763.1

Raidan Ba-Hattab, Abeer A Almashraqi, Yousef H Nasrawi, Samer Sunna, Elham S Abu Alhaija

{"title":"The effect of clear aligner and fixed orthodontic treatment on the development of pulp stones: a retrospective observational study.","authors":"Raidan Ba-Hattab, Abeer A Almashraqi, Yousef H Nasrawi, Samer Sunna, Elham S Abu Alhaija","doi":"10.2319/091824-763.1","DOIUrl":"https://doi.org/10.2319/091824-763.1","url":null,"abstract":"Objectives: To report the prevalence of pulp stones (PSs) in molars of orthodontically treated patients, investigate the impact of orthodontic treatment (ORT) using clear aligners (CAs) and fixed appliances (FAs) on the development of PSs in molars, and investigate the association between the incidence of PSs during ORT and the studied variables.Materials and methods: Pretreatment orthopantomograms (OPGs) of 600 patients were assessed. Of those, posttreatment OPGs of 272 patients were available. Molars were subdivided into four subgroups based on type of appliance and force application: group 1, first molars included in FA (n = 707); group 2, first molars included in CA (n = 157); group 3, second molars included in CA (n = 189); group 4, second molars not included in FA during treatment (n = 880). PSs were diagnosed when radiopaque bodies were detected in the coronal and/or radicular pulp space. PS changes after treatment were recorded and analyzed using SPSS.Results: The prevalence of PSs was 16.6%. The overall incidence of PSs increased by 5.9% and 4.5% in groups 1 and 2, and by 3.7% and 5.3% in groups 3 and 4, respectively (P ≤ .05). No significant differences were found between appliance type groups (1 and 2) and force application groups (3 and 4). The association between PS development and the type of appliance or treatment duration was not significant.Conclusions: The incidence of PSs increased during ORT, which was more pronounced in maxillary molars. PS development during ORT was not associated with orthodontic appliance type, force application, and duration of ORT.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143607217","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

Is the Peer Assessment Rating index a valid measure for change in Oral Health-Related Quality of Life following orthodontic treatment? Results of a cohort study. 同行评估评级指数是衡量正畸治疗后口腔健康相关生活质量变化的有效指标吗？队列研究的结果。

The Angle orthodontist Pub Date : 2025-03-05 DOI: 10.2319/091924-769.1

J Monisha, Elbe Peter, Suja Ani George

{"title":"Is the Peer Assessment Rating index a valid measure for change in Oral Health-Related Quality of Life following orthodontic treatment? Results of a cohort study.","authors":"J Monisha, Elbe Peter, Suja Ani George","doi":"10.2319/091924-769.1","DOIUrl":"https://doi.org/10.2319/091924-769.1","url":null,"abstract":"Objectives: To explore the relationship between changes in Peer Assessment Rating (PAR) score and Oral Health-Related Quality of Life (OHRQoL) following orthodontic treatment and to assess responsiveness of the Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ) in a cohort of young adults.Materials and methods: Participants (n = 162) aged 18-25 years requiring comprehensive fixed orthodontic treatment were recruited. Changes in OHRQoL were measured using the PIDAQ, while malocclusion severity was assessed using the PAR index and Index of Orthodontic Treatment Need. Data were collected before treatment (T0) and 1 month after treatment completion (T1). Responsiveness of the PIDAQ was evaluated using standardized effect size, standardized response mean, and Global Transition Judgment.Results: A positive, moderate overall correlation (r = 0.417, P < .05) was observed between changes in PAR and PIDAQ scores posttreatment, with significant improvements in OHRQoL reported by 88.1% of participants at T1. Subgroup analysis revealed strong correlations in cases of crowding (r = 0.711) and increased overjet (r = 0.703), while Class III malocclusion showed a weaker correlation (r = 0.263). Multivariate regression analysis revealed that change in PAR score was independently associated (R2 = 0.652) with change in OHRQoL score. The PIDAQ demonstrated responsiveness to treatment-associated changes, with a significant reduction in OHRQoL scores posttreatment.Conclusions: While a positive correlation between the objective measure of malocclusion severity (PAR) and subjective OHRQoL was identified, the relationship was moderate. The PIDAQ was found to be a responsive scale for assessing OHRQoL in orthodontic patients.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143560502","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

Effects of printing layer thickness and build orientation on the mechanical properties and color stability of 3D-printed clear aligners. 打印层厚度和构建方向对3d打印透明对准器力学性能和颜色稳定性的影响。

The Angle orthodontist Pub Date : 2025-03-05 DOI: 10.2319/081624-672.1

Chengzan Wu, Utkarsh Mangal, Na Bai, Hoon Kim, Geelsu Hwang, Jung-Yul Cha, Kee-Joon Lee, Jae-Sung Kwon, Sung-Hwan Choi

{"title":"Effects of printing layer thickness and build orientation on the mechanical properties and color stability of 3D-printed clear aligners.","authors":"Chengzan Wu, Utkarsh Mangal, Na Bai, Hoon Kim, Geelsu Hwang, Jung-Yul Cha, Kee-Joon Lee, Jae-Sung Kwon, Sung-Hwan Choi","doi":"10.2319/081624-672.1","DOIUrl":"https://doi.org/10.2319/081624-672.1","url":null,"abstract":"Objectives: To determine effects of printing layer thickness and build orientation on mechanical properties and color stability of direct 3D-printed clear aligner resin.Materials and methods: Specimens were printed using 3D printed clear aligner resin with two printing layer thicknesses (50 µm, 100 µm) and three build orientations (90°, 60°, and 45°). Mechanical properties (tensile stress, tensile strain, and elastic modulus), color stability in coffee and artificial saliva, and roughness were then evaluated.Results: Specimens printed with a 50 µm layer thickness and orientation at 90° demonstrated superior color stability in artificial saliva. However, all specimens showed high susceptibility to coffee staining regardless of layer thickness or orientation. Mechanical properties were improved in the order of 90° < 60° < 45° build orientation, showing statistically significant differences (P < .05). Surface roughness was increased in the order of 90° < 60° < 45° build orientation, showing statistically significant differences (P < .05).Conclusions: Printing layer thickness and orientation exerted significant effects on mechanical properties, color stability, and surface roughness of 3D-printed clear aligner resin.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143560500","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