The Angle orthodontist最新文献

Difference in discrepancies of mandibular incisor compensation relative to Menton deviation between Class III roll- and yaw-dominant asymmetries. Ⅲ类滚动和偏航主导型不对称之间下颌切牙补偿相对于门顿偏差的差异。

The Angle orthodontist Pub Date : 2024-11-01 DOI: 10.2319/022324-141.1

Ho-Jin Kim, Hyung-Kyu Noh, Hyo-Sang Park

{"title":"Difference in discrepancies of mandibular incisor compensation relative to Menton deviation between Class III roll- and yaw-dominant asymmetries.","authors":"Ho-Jin Kim, Hyung-Kyu Noh, Hyo-Sang Park","doi":"10.2319/022324-141.1","DOIUrl":"10.2319/022324-141.1","url":null,"abstract":"Objectives: To compare mandibular incisor compensation relative to Menton (Me) deviation between skeletal Class III patients with roll- and yaw-dominant mandibular asymmetries.Materials and methods: Sixty skeletal Class III patients (21.62 ± 2.69 years) with facial asymmetry were divided into roll- or yaw-dominant asymmetry groups. Mandibular skeletal and incisor measurements were carried out using cone-beam computed tomography data, and values were compared between the two asymmetry groups or between moderate and severe asymmetry subgroups using independent t-test or Mann-Whitney U-test. The relationship between skeletal and dental measurements was assessed using Pearson correlation coefficient.Results: Relative to the mandibular midsagittal plane, the yaw-dominant group presented significantly greater mandibular dental midline deviation in distance (LI-mid deviation, 2.15 mm) and angulation (4.20°) toward the nondeviated side than the roll-dominant group (P < .001). The ratio of amount of LI-mid deviation to Me deviation was significantly greater in the yaw-dominant group (26.44%) than in the roll-dominant group (1.76%; P < .001). In the yaw-dominant group, the LI-mid deviation was significantly greater in the severe asymmetry subgroup than in the moderate asymmetry subgroup, and the amount of mandibular incisor compensation was positively correlated with Me deviation and mandibular yaw.Conclusions: Mandibular incisor compensation differed significantly between the roll- and yaw-dominant asymmetry groups. The yaw-dominant group demonstrated significant mandibular dental midline deviation, and dental compensation of the anterior teeth was positively correlated with Me deviation and mandibular yaw.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11493426/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083018","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

Effectiveness of removable anterior bite planes with varied mealtime protocols in correcting deep bites among growing patients: a randomized clinical trial. 可移动前牙咬合平面与不同进餐时间方案对矫正成长期患者深咬合的效果：随机临床试验。

The Angle orthodontist Pub Date : 2024-11-01 DOI: 10.2319/022124-129.1

Thanapat Sangwattanarat, Udom Thongudomporn

{"title":"Effectiveness of removable anterior bite planes with varied mealtime protocols in correcting deep bites among growing patients: a randomized clinical trial.","authors":"Thanapat Sangwattanarat, Udom Thongudomporn","doi":"10.2319/022124-129.1","DOIUrl":"10.2319/022124-129.1","url":null,"abstract":"Objectives: To compare effectiveness of two protocols for correcting deep bite in growing patients using a removable anterior bite plane (RABP): full-time wear with appliance on during meals (F + M) vs off during meals (F - M) and to explore the relationship between average daily duration of wear and overbite (OB) correction rate, stratified by the wear protocol.Materials and methods: Thirty-two growing patients with deep bite (mean age = 10.94 ± 2.17 years) were randomly assigned to the F + M (n = 16) or F - M (n = 16) group. Cephalometric radiographs were taken at baseline (T0) and when normal OB was achieved (T1). Duration of wear was recorded by a TheraMon microsensor within the appliance. A best-fit regression model for the relationship between daily duration of wear and OB correction rate was determined (α = 0.05).Results: Both groups exhibited similar baseline characteristics and cephalometric changes, ie, molar extrusion, and incisor intrusion and proclination in both arches (P < .05), and intergroup differences were not significant. Here, F + M exhibited significantly faster rates of deep bite correction (1.83 ± 1.18 vs 1.08 ± 0.62 mm/month; P < .05) and mandibular molar extrusion (0.46 ± 0.25 vs 0.30 ± 0.18 mm/month, P < .05) compared with F - M. Best-fit regression models for relationship between daily duration of wear and OB correction rate were exponential for both F + M (R2 = 0.53) and F - M (R2 = 0.74).Conclusions: Here, F + M and F - M protocols resulted in comparable cephalometric changes among deep bite growing patients. However, the F + M group exhibited a faster correction rate. Daily duration of wear positively correlated with OB correction rate in an exponential manner.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11493425/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083020","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

Evaluation of automated photograph-cephalogram image integration using artificial intelligence models. 利用人工智能模型评估自动照片脑电图图像集成。

The Angle orthodontist Pub Date : 2024-11-01 DOI: 10.2319/010124-1.1

Jun-Ho Moon, Min-Gyu Kim, Sung Joo Cho, Dong-Yub Ko, Hye-Won Hwang, Ji-Ae Park, Shin-Jae Lee

{"title":"Evaluation of automated photograph-cephalogram image integration using artificial intelligence models.","authors":"Jun-Ho Moon, Min-Gyu Kim, Sung Joo Cho, Dong-Yub Ko, Hye-Won Hwang, Ji-Ae Park, Shin-Jae Lee","doi":"10.2319/010124-1.1","DOIUrl":"10.2319/010124-1.1","url":null,"abstract":"Objectives: To develop and evaluate an automated method for combining a digital photograph with a lateral cephalogram.Materials and methods: A total of 985 digital photographs were collected and soft tissue landmarks were manually detected. Then 2500 lateral cephalograms were collected, and corresponding soft tissue landmarks were manually detected. Using the images and landmark identification information, two different artificial intelligence (AI) models-one for detecting soft tissue on photographs and the other for identifying soft tissue on cephalograms-were developed using different deep-learning algorithms. The digital photographs were rotated, scaled, and shifted to minimize the squared sum of distances between the soft tissue landmarks identified by the two different AI models. As a validation process, eight soft tissue landmarks were selected on digital photographs and lateral cephalometric radiographs from 100 additionally collected validation subjects. Paired t-tests were used to compare the accuracy of measures obtained between the automated and manual image integration methods.Results: The validation results showed statistically significant differences between the automated and manual methods on the upper lip and soft tissue B point. Otherwise, no statistically significant difference was found.Conclusions: Automated photograph-cephalogram image integration using AI models seemed to be as reliable as manual superimposition procedures.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11493416/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142047676","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

Effect of printing technology and orientation on the accuracy of three-dimensional printed retainers. 印刷技术和方向对三维印刷保持器精度的影响。

The Angle orthodontist Pub Date : 2024-11-01 DOI: 10.2319/120823-812.1

Tarek ElShebiny, Luciane Macedo de Menezes, Stefanos Matthaios, Ioannis A Tsolakis, Juan Martin Palomo

{"title":"Effect of printing technology and orientation on the accuracy of three-dimensional printed retainers.","authors":"Tarek ElShebiny, Luciane Macedo de Menezes, Stefanos Matthaios, Ioannis A Tsolakis, Juan Martin Palomo","doi":"10.2319/120823-812.1","DOIUrl":"10.2319/120823-812.1","url":null,"abstract":"Objectives: To evaluate the impact of printer technology and print orientation on the accuracy of directly printed retainers.Materials and methods: Digital retainers were printed with two different printing technologies: digital light processing (DLP) and stereolithography (SLA), using two different orientations: 0° and 90°. After printing, the retainers (n = 40) were scanned using cone-beam computed tomography. The DICOM files were then converted into standard tessellation language (STL) files. Comparison of the printed retainers with a master file was done by superimposition using a three-dimensional (3D) best-fit tool in Geomagic software. A ±0.25 mm tolerance was set to detect differences between the superimposed files. Statistical analysis was conducted (Kruskal-Wallis and Wilcoxon-Mann-Whitney tests, with Bonferroni correction).Results: The lowest median average deviation was observed for the DLP horizontally printed models (median, [interquartile range (IQR)] = 0.01 mm, [-0.01, 0.02]) followed by the SLA horizontally printed retainers (median, [IQR] = 0.05 mm, [0.03, 0.07]). The highest median inside the tolerance levels ratio was observed for the horizontally SLA printed retainers (median, [IQR] = 78.9%, [74.4, 82.4%]) followed by the horizontally DLP printed retainers (median, [IQR] = 78.2%, [74.5, 80.7%]).Conclusions: Both technologies (DLP and SLA) showed 3D printed results compatible with orthodontic clinical needs. Printing orientation was more important than printer type regarding its accuracy. Additional studies are needed to evaluate the accuracy of direct printed appliances clinically.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11493428/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083019","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

How reliable is the artificial intelligence product large language model ChatGPT in orthodontics? 人工智能产品大型语言模型 ChatGPT 在正畸学中的可靠性如何？

The Angle orthodontist Pub Date : 2024-11-01 DOI: 10.2319/031224-207.1

Kevser Kurt Demirsoy, Suleyman Kutalmış Buyuk, Tayyip Bicer

{"title":"How reliable is the artificial intelligence product large language model ChatGPT in orthodontics?","authors":"Kevser Kurt Demirsoy, Suleyman Kutalmış Buyuk, Tayyip Bicer","doi":"10.2319/031224-207.1","DOIUrl":"10.2319/031224-207.1","url":null,"abstract":"Objectives: To evaluate the reliability of information produced by the artificial intelligence-based program ChatGPT in terms of accuracy and relevance, as assessed by orthodontists, dental students, and individuals seeking orthodontic treatment.Materials and methods: Frequently asked and curious questions in four basic areas related to orthodontics were prepared and asked in ChatGPT (Version 4.0), and answers were evaluated by three different groups (senior dental students, individuals seeking orthodontic treatment, orthodontists). Questions asked in these basic areas of orthodontics were about: clear aligners (CA), lingual orthodontics (LO), esthetic braces (EB), and temporomandibular disorders (TMD). The answers were evaluated by the Global Quality Scale (GQS) and Quality Criteria for Consumer Health Information (DISCERN) scale.Results: The total mean DISCERN score for answers on CA for students was 51.7 ± 9.38, for patients was 57.2 ± 10.73 and, for orthodontists was 47.4 ± 4.78 (P = .001). Comparison of GQS scores for LO among groups: students (3.53 ± 0.78), patients (4.40 ± 0.72), and orthodontists (3.63 ± 0.72) (P < .001). Intergroup comparison of ChatGPT evaluations about TMD was examined in terms of the DISCERN scale, with the highest value given in the patients group (57.83 ± 11.47) and lowest value in the orthodontist group (45.90 ± 11.84). When information quality evaluation about EB was examined, it GQS scores were >3 in all three groups (students: 3.50 ± 0.78; patients: 4.17 ± 0.87; orthodontists: 3.50 ± 0.82).Conclusions: ChatGPT has significant potential in terms of usability for patient information and education in the field of orthodontics if it is developed and necessary updates are made.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11493421/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083022","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 the effect of clear twin block and traditional twin block on speech: a randomized clinical trial. 比较透明双阻滞和传统双阻滞对言语的影响：随机临床试验。

The Angle orthodontist Pub Date : 2024-11-01 DOI: 10.2319/030323-149.1

Mohammad Rahim Shahbodaghi, Mahsa Zali, Ahmad Behroozian, Hooshang Dadgar

{"title":"Comparison of the effect of clear twin block and traditional twin block on speech: a randomized clinical trial.","authors":"Mohammad Rahim Shahbodaghi, Mahsa Zali, Ahmad Behroozian, Hooshang Dadgar","doi":"10.2319/030323-149.1","DOIUrl":"10.2319/030323-149.1","url":null,"abstract":"Objectives: To compare the effect of clear twin block (CTB) and traditional twin block (TTB) appliances on speech.Materials and methods: In this randomized clinical trial, 18 skeletal Class II (Class II, division 1) growing patients were selected and randomly divided into CTB and TTB groups. Objective and semiobjective speech assessment tests were performed for vowel and consonant analyses at four time intervals: before (T0), immediately after (T1), 1 month after (T2), and 3 months after (T3) inserting the appliance. Data were analyzed using analysis of variance and independent t-test at the .05 significance level.Results: Intergroup comparisons showed that the CTB group had less speech distortion immediately after insertion of the appliance (P < .05) than the TTB group; however, the differences were not significant at other time intervals. Intragroup comparisons showed that the number of distortions decreased significantly from T1 to T3 in both groups (P < .05). In contrast to CTB, the T0-T3 comparison was significant in the TTB group.Conclusions: Although both appliances had some effects on speech, CTB had less speech distortion immediately after insertion, which is a very crucial moment in patient compliance. Additionally, articulation structures adapted to CTB faster than to TTB.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11493417/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142047675","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

More molar distal movement than pretreatment cone-beam computed tomography posterior space available at the root level in mandibular dentition distalization with microimplants. 在使用微型种植体进行下颌牙远端矫治时，与矫治前相比，锥束计算机断层扫描在牙根水平可获得更多的磨牙远端移动空间。

The Angle orthodontist Pub Date : 2024-11-01 DOI: 10.2319/050724-357.1

Di Sun, Ho-Jin Kim, Hyung-Kyu Noh, Hyo-Sang Park

{"title":"More molar distal movement than pretreatment cone-beam computed tomography posterior space available at the root level in mandibular dentition distalization with microimplants.","authors":"Di Sun, Ho-Jin Kim, Hyung-Kyu Noh, Hyo-Sang Park","doi":"10.2319/050724-357.1","DOIUrl":"10.2319/050724-357.1","url":null,"abstract":"Objectives: To compare the mandibular posterior space available before treatment and the distance of molar distalization achieved after mandibular dentition distalization with microimplants.Materials and methods: A total of 66 Class I or III adult patients (mean age = 24.46 ± 4.89 years) who underwent molar distalization using microimplants were retrospectively included. The posterior space available distal to the second molar before treatment and the distance of distalization achieved after treatment were measured using axial cone-beam computed tomography images (0, 2, 4, and 6 mm apical to the second molar root furcation). Changes in lingual cortical thickness and molar root length after treatment were examined. Paired t-test or Wilcoxon signed-rank test was performed to compare measurements before and after treatment. Spearman correlation analysis was performed to assess the relationship between thinning of the cortical plate and root resorption.Results: Achieved distalization distance was significantly greater than pretreatment posterior space available by 0.8 mm at all root levels (P < .001). The difference was greater toward the root apex level and greater in the Class III group than the Class I group. Lingual cortical thickness was significantly decreased after treatment along with resorption of the second molar distal root (P < .001). In addition, a positive correlation was found between thinning of the cortical plate and distal root resorption of the molar (P < .001).Conclusions: Achieved distalization distance of the mandibular molar using microimplants was greater than the pretreatment posterior space available. Thinning of the lingual cortex and root resorption were observed after distalization.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11493423/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142047688","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

Correlations of spheno-occipital synchondrosis, cervical vertebrae, midpalatal suture, and third molar maturation stages. 脊枕骨突、颈椎、腭中缝和第三磨牙成熟阶段的相关性。

The Angle orthodontist Pub Date : 2024-11-01 DOI: 10.2319/041224-295.1

Evan Booth, Grace Viana, Sajjad Shirazi, Steven Miller, Terry Sellke, Mohammed Elnagar, Marlos Viana, Phimon Atsawasuwan

{"title":"Correlations of spheno-occipital synchondrosis, cervical vertebrae, midpalatal suture, and third molar maturation stages.","authors":"Evan Booth, Grace Viana, Sajjad Shirazi, Steven Miller, Terry Sellke, Mohammed Elnagar, Marlos Viana, Phimon Atsawasuwan","doi":"10.2319/041224-295.1","DOIUrl":"10.2319/041224-295.1","url":null,"abstract":"Objectives: To estimate the joint correlations among cervical vertebrae maturation (CVM), spheno-occipital synchondrosis (SOS), midpalatal suture maturation (MPS), and third molar mineralization (TMM) and to assess the predictive potential of SOS on CVM and MPS.Materials and methods: 570 pretreatment cone-beam computed tomogram (CBCT) scans from three private practices were analyzed, and MPS, CVM, SOS, and TMM stages were categorized and recorded by two independent investigators. Intra- and inter-rater reliability tests were evaluated with weighted Cohen's kappa tests. Spearman correlation coefficients for ordinal data were used to estimate the pairwise correlations among SOS, CVM, MPS, and TMM. To evaluate if SOS could predict CVM and MPS, ordinal regression models were estimated and cross-validated.Results: The analysis demonstrated a robust positive correlation between SOS and CVM (r = 0.845) and between SOS and MPS (r = 0.742). A significant correlation was also observed between CVM and MPS (r = 0.659). Further correlations were identified between TMM and SOS (r = 0.444), TMM and MPS (r = 0.392), and TMM and CVM (r = 0.358). Ordinal regression models indicated the potential of using SOS as a predictive marker for CVM and MPS stages.Conclusions: With a comprehensive analysis, SOS is strongly correlated with CVM and MPS, and SOS stage can be used to predict CVM and MPS using ordinal regression. Since MPS stages are challenging to categorize due to their anatomy, this finding suggests a diagnostic tool using SOS stages or when more information on skeletal maturity of the patient is desired.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11493427/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142082954","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 corrosion products of proprietary and generic orthodontic fixed lingual retainers and their in-vitro cytotoxicity. 专利和普通正畸固定舌侧保持器的腐蚀产物及其体外细胞毒性。

The Angle orthodontist Pub Date : 2024-11-01 DOI: 10.2319/112823-788.1

Nessa A Finlay, Lam Cheng, Elizabeth Kelly, Peter Petocz, Narayan Gandedkar, Mehmet Ali Darendeliler, Oyku Dalci

{"title":"The corrosion products of proprietary and generic orthodontic fixed lingual retainers and their in-vitro cytotoxicity.","authors":"Nessa A Finlay, Lam Cheng, Elizabeth Kelly, Peter Petocz, Narayan Gandedkar, Mehmet Ali Darendeliler, Oyku Dalci","doi":"10.2319/112823-788.1","DOIUrl":"10.2319/112823-788.1","url":null,"abstract":"Objective: To assess the corrosion products and cytotoxicity of generic and proprietary fixed lingual retainers (FLRs).Materials and methods: Seven FLRs were investigated. Wires were submersed in solution for 34 days, at 37°C, under constant agitation. A proportion of this solution was analyzed to determine the concentration of metallic ions leaching off the wires. The remainder was diluted to 5%, 10% and 20% followed by exposure to human gingival fibroblasts and analysis of cytotoxicity of the wires.Results: Three wires (Dentaflex, Universal, and AZDent) released excessive concentrations of lead, two wires (MeshMark and Orthoflex) released excessive concentrations of nickel, and one wire (Universal) released excessive concentrations of molybdenum into solution. No statistically significant difference was found between the wires analyzed (P = .24). Slight cytotoxicity was noted in only one wire (Dentaflex) at a 20% dilution of eluent. This was also the wire which released the highest concentration of lead into solution. All other wires, at all concentrations, were deemed noncytotoxic, but five samples overall were deemed statistically significant (P < .0024). A statistically significant difference existed between wires (P = .013) and concentrations analyzed (P < .001).Conclusions: Metals were released in differing quantities from all wires, with some elemental concentrations measuring more than that deemed acceptable in drinking water in Australia. A trend toward increased cell viability across samples was found with only one demonstrating cytotoxicity. There was no indication that generic FLRs were more or less biocompatible than their proprietary counterparts.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11493422/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142083023","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

3D printed indirect bonding trays: transfer accuracy of bar vs shell design in a prospective, randomized clinical trial. 三维打印间接粘接托盘：前瞻性随机临床试验中棒状与壳状设计的转移准确性。

The Angle orthodontist Pub Date : 2024-11-01 DOI: 10.2319/020524-90.1

Gulden Karabiber, Merve Nur Eglenen

{"title":"3D printed indirect bonding trays: transfer accuracy of bar vs shell design in a prospective, randomized clinical trial.","authors":"Gulden Karabiber, Merve Nur Eglenen","doi":"10.2319/020524-90.1","DOIUrl":"10.2319/020524-90.1","url":null,"abstract":"Objectives: To compare the transfer accuracy of two different indirect bonding (IDB) trays.Materials and methods: Digital IDB was performed on a total of 30 patients using one of two designs: shell and bar trays, with 15 patients in each group. Trays were designed with the Appliance Designer software (3Shape A/S, Copenhagen, Denmark). Angular (torque, tip, angulation) and linear (mesiodistal, buccolingual, occlusogingival) differences were compared between the bonded intraoral scans taken immediately after IDB and the virtually bracketed model prepared in Ortho Analyzer software (3Shape A/S) using open source GOM inspect software (GOM GmbH, Braunschweig, Germany).Results: There were no significant differences found between the bar and shell groups. Within the groups, significant tip differences were found between the incisors, canines, and premolars in both groups (P = .0001). Additionally, a statistically significant torque difference was found in the canines and incisors in the shell group. The percentage of values that deviated from the clinical acceptance limit was relatively higher in the bar group.Conclusions: Although there was no statistical difference between groups, the shell tray showed better results according to clinical acceptability limits. This study is important as it is the first clinical study to compare directly printed transfer trays with different designs.","PeriodicalId":94224,"journal":{"name":"The Angle orthodontist","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11493419/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142082950","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