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Journal articles on the topic 'Moyers Analysis; Study Plaster Models'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Dikshit, Parajeeta, Senchhema Limbu, Sunita Khanal, Manisha Malla, and Lok Raj Dhakal. "Comparison of Aboul-Azm and Fouda’s approach of mixed dentition analysis with Moyers technique." Birat Journal of Health Sciences 7, no. 1 (2022): 1718–22. http://dx.doi.org/10.3126/bjhs.v7i1.45822.

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Introduction: The prediction of mesiodistal widths of unerupted canines and premolars are an important aspect of analysis of the developing permanent dentition. Various radiographic as well as non radiographic methods have been tested and researched to predict the width of these teeth. The Moyers mixed dentition analysis is a universally accepted technique. Whereas Aboul-Azm and Fouda’s approach of mixed dentition analysis is a concept that derives the measurement from equation based on the buccolingual width of the permanent first molars. It does not require any table for the prediction. Obje

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Kaur, Avninder, Reetu Singh, Sudhir Mittal, Sunila Sharma, Aditi Bector, and Surabhi Awasthi. "Evaluation and Applicability of Moyers Mixed Dentition Arch Analysis in Himachal Population." Dental Journal of Advance Studies 02, no. 02 (2014): 096–104. http://dx.doi.org/10.1055/s-0038-1671993.

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Abstract Introduction: The determination of a tooth-size to arch length discrepancy in mixed dentition requires an accurate prediction of the mesiodistal width of the unerupted permanent teeth. The Moyers mixed dentition space analysis is the non-radiographic method for detecting tooth-size arch length discrepancies. Moyers analysis was developed for North American children. Anthropological studies reveal that tooth size varies among different races and ethnicities. Aim: The present study was aimed to determine the applicability of Moyers mixed dentition arch analysis in children of Baddi, Him

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Sennimalai, Karthik, and Madhanraj Selvaraj. "Orthodontic model analysis in the permanent dentition: A review of past, and current methods." IP Indian Journal of Orthodontics and Dentofacial Research 8, no. 4 (2022): 220–26. http://dx.doi.org/10.18231/j.ijodr.2022.038.

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The study models are regarded as the gold standard tool in orthodontics since they aid in the diagnosis, treatment planning and monitoring of the changes that may occur throughout treatment. Besides these, plaster models are also used to monitor growth and clinical audits. A study model accurately replicates the teeth, surrounding soft tissues and occlusion. Traditionally, the orthodontic study models have been used to measure the overjet and overbite, tooth size, arch length, arch width, the curve of Wilson and Spee, space analysis and diagnostic setup. However, plaster models are still prefe

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Tancu, Ana Maria Cristina, Mihaela Pantea, Alexandra Totan, Mihaela Tanase, and Marina Imre. "3D Printed Dental Models A comparative analysis." Materiale Plastice 56, no. 1 (2019): 51–54. http://dx.doi.org/10.37358/mp.19.1.5121.

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The aim of this study is to compare two different methods used for obtaining printed dental models -intraoral scanning and extraoral scanning; the comparative analysis was made in correlation to the accuracy of the traditional plaster cast model. Nine dental models were obtained: three plaster cast ones, three printed after intraoral scanning and there printed after impression scanning. A total of 137 measurements (arch and tooth measurements) were done on the three types of models and a statistical evaluation was performed (t-test, Fisher Test). Our results highlighted that 3D printed dental

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Goonewardene, Roy W., Mithran S. Goonewardene, John M. Razza, and Kevin Murray. "Accuracy and validity of space analysis and irregularity index measurements using digital models." Australasian Orthodontic Journal 24, no. 2 (2008): 83–90. http://dx.doi.org/10.2478/aoj-2008-0012.

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Abstract Background Digital copies of study models may avoid the storage and retrieval issues of plaster study models, but measurements made on digital models may not be as accurate as measurements made on traditional study models. Aim To determine the reliability and validity of tooth size–arch length discrepancies (TALD), irregularity indices and arch lengths (four- and six-segment analyses) measured directly on study models with digital calipers with the same measurements measured on digital copies of the study models with proprietary software. Methods The irregularity indices and TALDs (fo

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Peh, Yew Jia, Ming Tak Chew, Hung Chew Wong, and Mimi Yow. "Validity and Reliability of Peer Assessment Rating Index Measurement Derived from Digital and Plaster Models." APOS Trends in Orthodontics 8 (September 1, 2018): 131–38. http://dx.doi.org/10.4103/apos.apos_39_18.

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Aims The aim of the study was to determine the validity and reliability of Peer Assessment Rating (PAR) index score derived from digital and plaster models of the same patient. Subjects and Methods Thirty orthodontic plaster study models were digitalized using the 3Shape R700™ Orthodontic 3D scanner. PAR Index scoring was carried out on both the plaster and digital models by one independent examiner calibrated in the PAR Index. The measurements were repeated at a second sitting. Measurements were made on plaster models with the PAR Index ruler and on digital models with the 3Shape OrthoAnalyze

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Bedi, Prince, Divya Shetty, Bhupender Singh, Ayushi Nagar, and Payal Sharma. "Orthodontics in 3D: Unveiling the precision of printed models vs plaster traditions." Journal of Contemporary Orthodontics 9, no. 1 (2025): 111–16. https://doi.org/10.18231/j.jco.2025.015.

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Orthodontic treatment relies heavily on accurate diagnosis and treatment planning. Traditionally, study casts obtained from plaster models have been an essential component of orthodontic records. However, advancements in three-dimensional imaging and modeling have introduced digital alternatives, offering ease of access, storage, and transfer of patient information. To compare the accuracy of linear measurements obtained from 3D printed models with those taken from plaster study models and identify the most reliable type of printed model. The study was conducted on ten patients requiring fixed

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Lo Giudice, Antonino, Simone Muraglie, Stefano Martina, Vincenzo Ronsivalle, and Rosalia Leonardi. "Accuracy and Reliability of Space Analysis Measurements in Digital Models with Different Degrees of Crowding." Open Dentistry Journal 13, no. 1 (2019): 505–11. http://dx.doi.org/10.2174/1874210601913010505.

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Background: With the introduction of digital systems in the orthodontic field, it is not still clear if such systems can accurately substitute analogical systems in the diagnosis and orthodontic treatment plane. Objective: The study compared the Arch Length Discrepancy (TALD) and Bolton ratio obtained from plaster dental casts (gold standard) and digital models and tested the null hypothesis that TALD and Bolton ratio measurements in digital models are affected by the degree of crowding. Methods: The sample included 40 dental models divided into five sub-groups, according to the American Board

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Petrović, Valentina, Martina Šlaj, Mia Buljan, Tadej Čivljak, Ana Zulijani, and Berislav Perić. "Comparison of Tooth Size Measurements in Orthodontics Using Conventional and 3D Digital Study Models." Journal of Clinical Medicine 13, no. 3 (2024): 730. http://dx.doi.org/10.3390/jcm13030730.

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(1) Background: The objective of this study was to assess which digitization method produces the biggest deviation in the 3D images of tooth size from plaster models made using alginate impressions, which are considered the gold standard in orthodontics. (2) Methods: The sample used in this study included 30 subjects (10 males and 20 females). Measurements were made on four types of models: (1) digital models obtained through intraoral scanning and digitized models of plaster cast made from (2) alginate impressions, (3) silicone impressions, and (4) conventional plaster models. Mesio-distal (M

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Kardach, Hubert, Anna Szponar-Żurowska, and Barbara Biedziak. "A Comparison of Teeth Measurements on Plaster and Digital Models." Journal of Clinical Medicine 12, no. 3 (2023): 943. http://dx.doi.org/10.3390/jcm12030943.

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(1) Background: Modern imaging methods and constantly developing technologies extend the range of diagnostic tools in medicine and in orthodontics. Thanks to them, scientists and doctors can use devices designed to diagnose 3D structures of the human body. The aim of the study was to assess the usefulness of digital orthodontic models as a diagnostic tool in the work of an orthodontist through a comparative analysis of the value of orthodontic measurements made on traditional plaster models and virtual models. (2) Methods: A total of 80 sets of models were made, including 40 sets of plaster mo

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Tran, Vo Huyen Bao, Tran Hung Lam, Truong Nhut Khue, Tran Ngoc Quang Phi, and Hoang Viet. "Accuracy and Reliability of Digital Dental Models Obtained by Intraoral Scans Compared with Plaster Models." Applied Sciences 15, no. 6 (2025): 2927. https://doi.org/10.3390/app15062927.

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Introduction: In orthodontics, determining the parameters of tooth size and dental arch and conducting Bolton analysis is crucial for diagnosis, treatment planning, and patient outcomes. This study evaluates the accuracy and reliability of measuring dental-arch dimensions on digital models created using the CEREC Primescan intraoral scanner, compared to measurements taken from plaster models. Methods: The study included two types of dental models (plaster and intraoral scan) from sixty-three subjects. Impressions were taken to create plaster models, and the subjects’ mouths were scanned with t

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Belandria, Cesar Daniel Avendaño. "Comparative Analysis between Conventional Plaster Models and Digital Models in the Accuracy of Prosthetic Adaptation." Revista JRG de Estudos Acadêmicos 8, no. 18 (2025): e081976. https://doi.org/10.55892/jrg.v8i18.1976.

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The comparison between conventional plaster cast models and digital models in the accuracy of prosthetic fitting is a relevant topic in modern dentistry. Several studies have shown that digital models, obtained by intraoral scanning, have advantages in terms of accuracy, processing time, and patient satisfaction over conventional plaster models. While both methods can be effective, digital models offer greater flexibility, allowing for better fitting of prostheses, with fewer impression errors and greater reproducibility. However, it is important to consider the variations that may occur depen

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Petrović, Valentina, Martina Šlaj, Mia Buljan, Luka Morelato, Ana Zulijani, and Berislav Perić. "A Comparison of Dental Arch Width and Length on 3D Digital and Plaster Models." Applied Sciences 14, no. 9 (2024): 3572. http://dx.doi.org/10.3390/app14093572.

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The aim of the study was to determine potential deviation in measurements of commonly used orthodontic variables, including intermolar width (IMW), intercanine width (ICW), and arch perimeter (AP), when measured on three-dimensional images compared to measurements performed on plaster models obtained from alginate impressions using a hand-held digital vernier caliper. A total of 120 sets of models were divided into four groups: plaster models made from an alginate impression, digitized plaster models made from an alginate and silicone impression, and digital models obtained via intraoral scan.

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Zhulev, Evgeny N., and Yuliya A. Vokulova. "Study of the dimensional accuracy of jaw models obtained by 3d printing using stereolithography." Kuban Scientific Medical Bulletin 27, no. 1 (2020): 40–48. http://dx.doi.org/10.25207/1608-6228-2020-27-1-40-48.

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Aim. To study the dimensional accuracy of dentition models produced by digital and conventional methods using an experimental model and digital technologies.Materials and methods. This article presents an assessment of the dimensional accuracy of jaw models created using an Asiga Max UV 3D printer from digital images of dentition created by an iTero Cadent intraoral scanner and plaster jaw models obtained from one-stage two-layer A-silicone impressions. The DentalCAD software and the Meshlab computer program were used to study the dimensional accuracy of the as-obtained digital images. The non

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Jacquet, Wolfgang, Edgard Nyssen, Gabriele Ibel, and Bart Vande Vannet. "On the augmented reproducibility in measurements on 3D orthodontic digital dental models and the definition of feature points." Australasian Orthodontic Journal 29, no. 1 (2013): 28–33. http://dx.doi.org/10.2478/aoj-2013-0005.

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Abstract Objective: The objective of this study was to explore digital measurement methodology on 3-dimensional (3D) dental models. Standardised manipulation and practices have lead to reliable measurements on plaster casts. Identifying landmarks on digital models or digitised plaster casts is fundamentally different from actual measurements. Three-dimensional models are represented on flat screens and landmarks are individually indentified. A procedure is proposed that resolves the deficiencies associated with a 2-dimensional (2D) display through an appropriate model representation and throug

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Tonetto, Mateus Rodrigues, Matheus Coelho Bandéca, Mônica Barros Silva, et al. "Comparison of Linear Measurements and Analyses taken from Plaster Models and Three-dimensional Images." Journal of Contemporary Dental Practice 15, no. 6 (2014): 681–87. http://dx.doi.org/10.5005/jp-journals-10024-1599.

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ABSTRACT Digital models are an alternative for carrying out analyses and devising treatment plans in orthodontics. The objective of this study was to evaluate the accuracy and the reproducibility of measurements of tooth sizes, interdental distances and analyses of occlusion using plaster models and their digital images. Thirty pairs of plaster models were chosen at random, and the digital images of each plaster model were obtained using a laser scanner (3Shape R-700, 3Shape A/S). With the plaster models, the measurements were taken using a caliper (Mitutoyo Digimatic®, Mitutoyo (UK) Ltd) and

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Burde, A. V., S. Baciu, A. G. Grecu, M. Manole, and S. Sava. "Quantitative three-dimensional analysis of dental diagnostic models obtained by two additive manufacturing techniques." Medicine in Evolution 28, no. 1 (2022): 91–97. http://dx.doi.org/10.70921/medev.v28i1.1102.

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Aim and objectives: Due to the low tensile strength of gypsum that causes susceptibility to fracture of dental diagnostic plaster casts, long-term storage of these models may become problematic and inconvenient for dental healthcare practitioners. The purpose of this study is to investigate the possibility of 3D printing these models, by testing the accuracy of dental diagnostic models produced by two additive manufacturing techniques. Material and methods: For this purpose, 20 conventional plaster models from randomly chosen subjects were selected and served as reference. The casts were digit

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Nalcaci, Ruhi, Tolga Topcuoglu, and Firat Ozturk. "Comparison of Bolton analysis and tooth size measurements obtained using conventional and three-dimensional orthodontic models." European Journal of Dentistry 07, S 01 (2013): S066—S070. http://dx.doi.org/10.4103/1305-7456.119077.

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ABSTRACT Objectives: The aim of this study was to compare the accuracy, reproducibility, efficacy and effectiveness of measurements obtained using digital models with those obtained using plaster models. Materials and Methods: A total of 20 digital models were produced by the Ortho Three-dimensional Models (O3DM) Laboratory and their software (O3DM version 2) was used to obtain measurements. Identical plaster models were used to obtain measurements of teeth with a vernier caliper. The maximum mesiodistal width of each study model, from first molar to first molar, was measured. All measurements

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Yoo, Jo-Kwang, Yoon-Koo Kang, Su-Jung Lee, Seong-Hun Kim, and Cheol-Hyun Moon. "Accuracy of inter-arch measurements performed on digital models generated using two types of intraoral scanners: Ex vivo study." Journal of The Korean Dental Association 58, no. 4 (2020): 194–205. http://dx.doi.org/10.22974/jkda.2020.58.4.001.

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Objective: The purpose of this study was to evaluate the accuracy of the inter-arch relationship of digital models generated using two types of intraoral scanners. Methods: In total, 34 plaster model samples were used. Two corresponding digital models were created using two types of intraoral scanners. A total of 15 variables were measured. The plaster model was directly measured using a digital caliper, while the digital models were measured using a software. The accuracy of the measurements was evaluated using repeated measures analysis of variance and the Friedman test. Results: Among the 1

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Zotti, Francesca, Luca Rosolin, Massimo Bersani, Andrea Poscolere, Davide Pappalardo, and Nicoletta Zerman. "Digital Dental Models: Is Photogrammetry an Alternative to Dental Extraoral and Intraoral Scanners?" Dentistry Journal 10, no. 2 (2022): 24. http://dx.doi.org/10.3390/dj10020024.

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Background: 3D models are nowadays part of daily clinical practice. Photogrammetry is a brand-new method for transforming small objects into 3D models while keeping their original shape and size. The aim of this study was to evaluate the accuracy, in terms of precision and trueness, of a digital dental model acquired with photogrammetry compared with those obtained using extraoral scanners and intraoral scanners, starting from the same plaster model. Methods: A plaster model was converted into a digital model using photogrammetry, an extraoral scanner and an intraoral scanner. Different refere

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Shetty, Shravan, Srikant Natarajan, Supriya Nambiar, Prithvi Shetty, Kavery Chengappa, and Mukul Shetty. "An evaluation of concordance between linear measurements obtained from conventional, digital and reconstructed three-dimensional printed orthodontic models: An in vitro study." Acta Marisiensis - Seria Medica 68, no. 4 (2022): 159–63. http://dx.doi.org/10.2478/amma-2022-0028.

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Abstract Objective: To evaluate the potential use of digital and reconstructed three-dimensional printed models as an alternative to conventional plaster models by assessing the accuracy of their linear measurements. Methodology: Pre-treatment plaster models of 45 patients were selected from the archives of the Department of Orthodontics. Each physical plaster model was scanned and digitized using a three-dimensional (3D) laser surface scanning system (inEOS X5, Dentsply Sirona, Bensheim, Germany). The scanned STL files were later used to reconstruct models by 3D printing using Figure4® standa

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Correia, Gabriele Dória Cabral, Fernando Antonio Lima Habib, and Carlos Jorge Vogel. "Tooth-size discrepancy: A comparison between manual and digital methods." Dental Press Journal of Orthodontics 19, no. 4 (2014): 107–13. http://dx.doi.org/10.1590/2176-9451.19.4.107-113.oar.

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INTRODUCTION: Technological advances in Dentistry have emerged primarily in the area of diagnostic tools. One example is the 3D scanner, which can transform plaster models into three-dimensional digital models. OBJECTIVE: This study aimed to assess the reliability of tooth size-arch length discrepancy analysis measurements performed on three-dimensional digital models, and compare these measurements with those obtained from plaster models. MATERIAL AND METHODS: To this end, plaster models of lower dental arches and their corresponding three-dimensional digital models acquired with a 3Shape R70

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Julyan, JC, Jennifer Julyan, and Johny De Lange. "Comparison of three different instruments for orthodontic study model analysis." South African Dental Journal 75, no. 6 (2020): 298–302. http://dx.doi.org/10.17159/2519-0105/2020/v75no6a2.

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INTRODUCTION: A proper model analysis forms a vital part of the orthodontic diagnosis process, but it remains a time-consuming procedure. In day-to-day practice, many orthodontists assess the models subjectively, without applying analytical tests, due to the time it takes to do proper model analysis.1,2 Plaster dental models have long been the gold standard for orthodontic study model analysis and to calculate the Bolton index for tooth size disproportions, as well as intra-arch space discrepancies.3,4 Vernier callipers or needle pointed dividers are traditionally used to perform measurements

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Sanches, Júlia Olien, Lourdes Aparecida Martins dos Santos-Pinto, Ary dos Santos-Pinto, Betina Grehs, and Fabiano Jeremias. "Comparison of space analysis performed on plaster vs. digital dental casts applying Tanaka and Johnston's equation." Dental Press Journal of Orthodontics 18, no. 1 (2013): 128–33. http://dx.doi.org/10.1590/s2176-94512013000100024.

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OBJECTIVE: The purpose of this study was to compare dental size measurements, their reproducibility and the application of Tanaka and Johnston regression equation in predicting the size of canines and premolars on plaster and digital dental casts. METHODS: Thirty plaster casts were scanned and digitized. Mesiodistal measurements of the teeth were then performed with a digital caliper on the plaster and digital casts using O3d software system (Widialabs©).The sum of the sizes of the lower incisors was used to obtain predictive values of the sizes of the premolars and canines using the regressio

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Arapović-Savić, Marijana, Mihajlo Savić, Mirjana Umićević-Davidović, Adriana Arbutina, Nenad Nedeljković, and Branislav Glišić. "Photogrammetry based space analysis measurements in orthodontic diagnosis." Stomatoloski glasnik Srbije 65, no. 2 (2018): 78–88. http://dx.doi.org/10.2478/sdj-2018-0008.

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Summary Introduction Lundstrom segmental analysis is often used analysis in orthodontic diagnosis. It includes measurements of available and needed space in the arch in order to determine whether there is a lack or excess of space for proper teeth alignment. Measurements are traditionally performed on plaster study models, but with recent developments of computer-based systems, there is an increase in use of digital models in measuring process. The aim of this study was to present a photogrammetry based measurement approach that requires no specialized and expensive hardware and compare result

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Jakubowicz, Michał, Bartosz Gapiński, Lidia Marciniak-Podsadna, Michał Mendak, Patryk Mietliński, and Michał Wieczorowski. "Multiscale Evaluation of Jaw Geometry Reproduction Obtained Via the Use of Selected Orthodontic Materials in Dental Implants and Orthodontics—In Vitro Case Study." Applied Sciences 13, no. 12 (2023): 6932. http://dx.doi.org/10.3390/app13126932.

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In this paper, the multiscale analysis of the reproduction accuracy of jaw geometry obtained via the use of selected orthodontic materials is discussed. Impressions were made from two types of impression material. An accuracy assessment of the model geometry mapping was performed using noncontact systems, including a fringe projection optical 3D scanner, computed tomography, and a focus variation microscope. Measurements were made in three modes for comparison, as were the silicone and polyether impression materials. These modes were a jaw model and impression, an impression and plaster model,

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Procházka, Aleš, Tatjana Dostálová, Magdaléna Kašparová, et al. "Augmented Reality Implementations in Stomatology." Applied Sciences 9, no. 14 (2019): 2929. http://dx.doi.org/10.3390/app9142929.

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Augmented reality has a wide range of applications in many areas that can extend the study of real objects into the digital world, including stomatology. Real dental objects that were previously examined using their plaster casts are often replaced by their digital models or three-dimensional (3D) prints in the cyber-physical world. This paper reviews a selection of digital methods that have been applied in dentistry, including the use of intra-oral scanning technology for data acquisition and evaluation of fundamental features of dental arches. The methodology includes the use of digital filt

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Carrillo, Jorge J. Pavani, Maria C. Rubial, Cristina Albornoz, Silvina Villalba, Patricia Damiani, and Marta Rugani de Cravero. "Applicability of the Moyers' Probability Tables in Adolescents with Different Facial Biotypes." Open Dentistry Journal 11, no. 1 (2017): 213–20. http://dx.doi.org/10.2174/1874210601711010213.

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Introduction: The Moyers’ probability tables are used in mixed dentition analysis to estimate the extent of space required for the alignment of canines and premolars, by correlating the mesiodistal size of lower incisors with the size of permanent canines and premolars. Objective: This study intended to evaluate the applicability of the Moyer's probability tables for predicting the mesiodistal space needed for the correct location of premolars and permanent canines non-erupted, in adolescents of the city of Cordoba, Argentina, who show different facial biotypes. Materials and Methods: Models a

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Zhang, Xiangyang, Xiaodong Yang, Nan Zhao, and Muhammad Bilal Khan. "Analysis of the Applicable Range of the Standard Lambertian Model to Describe the Reflection in Visible Light Communication." Electronics 11, no. 9 (2022): 1514. http://dx.doi.org/10.3390/electronics11091514.

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The existing visible light communication simulation research on reflection is mainly based on the standard Lambertian model. In recent years, some papers have mentioned that the standard Lambertian model is too simplified and approximate to meet the actual situation. To solve this problem, a variety of more complex reflection models have been proposed. However, the more complex models require more computation. To balance computation and simulation accuracy, by consulting the literature, this study found that the standard Lambertian model has a certain requirement of the incident angle range to

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Dramaretska, S. I., O. A. Udod, and R. S. Kostenko. "DIGITAL TECHNOLOGIES IN THE DIAGNOSIS AND TREATMENT OF ORTHODONTIC PATHOLOGY." Ukrainian Dental Almanac, no. 4 (December 25, 2024): 65–69. https://doi.org/10.31718/2409-0255.4.2024.11.

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The use of digital technologies and artificial intelligence for information analysis opens new opportunities in orthodontic practice. The aim of the study was to analyze the time spent on diagnosing and preparing for the treatment of orthodontic pathology using traditional approaches versus digital technologies. Materials and Methods. Diagnosis in 35 individuals (46.7%) in Group I was conducted using traditional methods, and bracket system positioning was performed on plaster models with indirect transfer fabrication. Diagnosis in 40 individuals (53.3%) in Group II was conducted using digital

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Joteppa, Varsha, Soniya Niras, Dishita Chokhani, Tanvi A. Jadhao, Shreyas T. Bandgar, and Surbhi G. Bayaskar. "Accuracy of 3D Printed Model Acquired from Different Types of Intra Oral Scanners and 3D Printers." Journal of Pharmacy and Bioallied Sciences 16, Suppl 2 (2024): S1433—S1434. http://dx.doi.org/10.4103/jpbs.jpbs_798_23.

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ABSTRACT Objective: The aim of this study was to verify the influence of different types of intraoral scanners and 3D printers on the accuracy of printed models in comparison to plaster models obtained from conventional impressions. Material and Methods: A dental study model was used as the reference model and was molded with polyvinyl siloxane to produce the plaster models which were scanned by a reference scanner. Two types of intraoral scanners and digital files were printed by two types of 3D printers. To measure the accuracy (trueness and precision) amongst the groups, the datasets were s

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Nguyen, Thong Phi, Jang-Hoon Ahn, Hyun-Kyo Lim, Ami Kim, and Jonghun Yoon. "Automated Measurements of Tooth Size and Arch Widths on Cone-Beam Computerized Tomography and Scan Images of Plaster Dental Models." Bioengineering 12, no. 1 (2024): 22. https://doi.org/10.3390/bioengineering12010022.

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Measurements of tooth size for estimating inter-arch tooth size discrepancies and inter-tooth distances, essential for orthodontic diagnosis and treatment, are primarily done using traditional methods involving plaster models and calipers. These methods are time-consuming and labor-intensive, requiring multiple steps. With advances in cone-beam computerized tomography (CBCT) and intraoral scanning technology, these processes can now be automated through computer analyses. This study proposes a multi-step computational method for measuring mesiodistal tooth widths and inter-tooth distances, app

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Adedeji, Adeola A., Aminu Ibiyeye, and Abiola M. Adedeji. "Effect of Temperature on Strawbale Wall Rendered with Laterite and Clay Nanoparticle." MATEC Web of Conferences 165 (2018): 22008. http://dx.doi.org/10.1051/matecconf/201816522008.

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In this study, the influence of the plastering materials on the thermal performance of three (3) straw bale building models were evaluated. The plastering materials considered are laterite mortal, laterite mortal with nanoparticle clay screeding and cement-sand mortal. The results were based on the experimentally measured thermal conductance, thermal resistance and thermal transmittance of the building model according to ASTM C1045-90 standard specification. The analysis of the measured data revealed that the laterite plaster significantly improve the thermal resistivity of the building model

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Serrano-Velasco, Diego, Andrea Martín-Vacas, Giovanni Giovannini, Marta Macarena Paz-Cortés, and Juan Manuel Aragoneses. "Accuracy Analysis of Digital Models from Intraoral Scanners and 3D-Printed Casts in Children and Teenagers." Children 11, no. 9 (2024): 1082. http://dx.doi.org/10.3390/children11091082.

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Purpose: The aim was to analyze the accuracy of digital models and 3D-printed casts from full-arch digital impressions using two intraoral scanners (iTeroTM and PrimescanTM). Materials and methods: A crossover reliability study was designed, scanning children and teenagers with iTeroTM and PrimescanTM. Accuracy was evaluated by measuring intercanine, intermolar, and ipsilateral canine–molar distances intraorally and comparing these measurements with those from plaster casts, digital models obtained with intraoral scanners, and 3D-printed casts. A paired comparison and a general linear model wi

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Turetskova, I. A., M. A. Zvigintsev, and V. E. Gunther. "Biometrics of Jaw Models Analysis in Treating Tooth Position Anomalies with the Use of Orthodontic Shape Memory Apparatus." KnE Materials Science 2, no. 1 (2017): 296. http://dx.doi.org/10.18502/kms.v2i1.810.

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The paper presents the results of research in the field of orthodontic treatment of patients with the use of conventional bracket system methods as well as with the orthodontic thread and hollow tube made of superelastic nickelid titanium (TiNi) alloy, the method of measurement of plaster jaw models introduced by L. Persin. The study reveals the advantages of our newly developed apparatus for orthodontic tooth movement in the transverse and sagittal directions.

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Anacleto, Murilo Augusto, and Bernardo Quiroga Souki. "Superimposition of 3D maxillary digital models using open-source software." Dental Press Journal of Orthodontics 24, no. 2 (2019): 81–91. http://dx.doi.org/10.1590/2177-6709.24.2.081-091.bbo.

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Abstract Historically, whether for research purposes or clinical monitoring, orthodontic evaluation of dental movements has been done using plaster study models and two dimensional (2D) radiographs. However, new frontiers for the diagnosis, planning and outcome assessment of orthodontic treatments have arisen, due to the revolutionary digital tools which enable a three dimensional (3D) computerized analysis of dental movements by means of digital models. However, the software for 3D analysis are often costly, resulting in limited access to orthodontists. The present study aims to describe, thr

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Cornelius, Canon C., Joseph Daniels, Hugo C. Garcia, and Stephen J. Warner. "Biomechanical Properties of Splint Materials Immediately Following Dipping." Foot & Ankle Orthopaedics 7, no. 4 (2022): 2473011421S0063. http://dx.doi.org/10.1177/2473011421s00636.

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Category: Basic Sciences/Biologics; Trauma Introduction/Purpose: Many studies have evaluated splint strength at maturity with multiple splint materials, methods, and configurations. No study to date has tested them while they were curing. This is an important for both emergency room management and post-operative splints. Methods: Model splints of plaster, ten layers thick, and a standard prefabricated fiberglass splint were made of the same size, 125 total splints were made. They were dipped in two temperatures of water, room temperature (70oF) and warm temperature (100oF), an additional group

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Lima, Daniel Junio da Silva, Luís Francisco Mello Coelho, and Renato Garcia Rodrigues. "Influência da Indústria do Gesso e da Agropecuária na Dinâmica da Cobertura Vegetal no Polo Gesseiro do Araripe." Revista Brasileira de Geografia Física 13, no. 07 (2020): 3326. http://dx.doi.org/10.26848/rbgf.v13.07.p3326-3335.

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A exploração da gipsita, minério utilizado na produção de Gesso, constitui a principal atividade econômica do Polo Gesseiro do Araripe (PGA), tendo principalmente a lenha como matriz energética nas indústrias de transformação. Para compreender como a dinâmica econômica e produtiva do PGA está relacionada com as variações na cobertura vegetal, combinamos informações do MapBiomas com dados relacionados a indústria do gesso e ao PIB do PGA. A cobertura vegetal da área de estudo é caracterizada por fisionomias de caatinga sedimentar e cristalina, sendo que as áreas de caatinga sedimentar, localiza

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Suryajaya, William, Maria Purbiati, and Nada Ismah. "Accuracy of digital dental models and three-dimensional printed dental models in linear measurements and Bolton analysis." F1000Research 10 (March 4, 2021): 180. http://dx.doi.org/10.12688/f1000research.31865.1.

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Background: Due to advances in digital technology, it is possible to obtain digital dental models through intraoral scanning. The stereolithographic data collected from the scanner can subsequently be printed into a three-dimensional dental model in resinic material. However, the accuracy between digital dental models and printed dental models needs to be evaluated since it might affect diagnosis and treatment planning in orthodontic treatment. This study aimed to evaluate the accuracy of digital models scanned by a Trios intraoral scanner and three-dimensional dental models printed using a Fo

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Suryajaya, William, Maria Purbiati, and Nada Ismah. "Accuracy of digital dental models and three-dimensional printed dental models in linear measurements and Bolton analysis." F1000Research 10 (September 1, 2021): 180. http://dx.doi.org/10.12688/f1000research.31865.2.

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Background: Due to advances in digital technology, it is possible to obtain digital dental models through intraoral scanning. The stereolithographic data collected from the scanner can subsequently be printed into a three-dimensional dental model in resinic material. However, the accuracy between digital dental models and printed dental models needs to be evaluated since it might affect diagnosis and treatment planning in orthodontic treatment. This study aimed to evaluate the accuracy of digital models scanned by a Trios intraoral scanner and three-dimensional dental models printed using a Fo

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Park, Seohyun, Jongsoo Kim, and Sohee Oh. "Validity, Reliability and Reproducibility of Space Analysis using Digital Model taken via Model Scanner and Intraoral Scanner: An In vivo Study." JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY 47, no. 2 (2020): 176–87. http://dx.doi.org/10.5933/jkapd.2020.47.2.176.

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The purpose of this study is to evaluate validity, reliability and reproducibility of tooth width (TW), arch length (AL) and arch length discrepancy (ALD) measured on a digital model taken via 3-dimensional model scanner and intraoral scanner compared to a plaster model.<br/>A total of 30 patients aged 12 to 18 were eligible for the study. 3 types of models were acquired from each patient: a conventional plaster model (P), a model scanned digital model (MSD) taken via Freedom UHD<sup>®</sup> and an intraoral scanned digital model (ISD) taken via CS3600<sup>®</sup>

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Karadede Ünal, Beyza, and Deniz Dellaloğlu. "Digital analysis of tooth sizes among individuals with different malocclusions: A study using three-dimensional digital dental models." Science Progress 104, no. 3 (2021): 003685042110381. http://dx.doi.org/10.1177/00368504211038186.

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Objective: It is aimed to examine the tooth sizes of digital models of patients with different malocclusions with the help of three-dimensional measurement software. Methods: Digital models of 252 patients aged between 13 and 25 years of age were included. According to the Angle classification, three different malocclusion groups were allocated such that there were 84 patients in each group, plaster models of patients scanned with the three-dimensional model browser 3Shape R700 3D Scanner (3Shape A/S Copenhagen, Denmark) and transferred to the digital format. 3Shape Ortho Analyzer (3Shape A/S

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Bouzouaid, Samia, and Hachem Chaib. "Effects of glass powder and Gypsum (Timchemt) on the thermal and mechanical properties of plaster bricks." STUDIES IN ENGINEERING AND EXACT SCIENCES 5, no. 1 (2024): 59–82. http://dx.doi.org/10.54021/seesv5n1-004.

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The present research aims to study the effect of glass powder extracted from the glass waste disposal area in Ouargla (southern Algeria) on the thermo mechanical properties of plaster bricks. Therefore, density, compressive strength, flexural strength, thermal conductivity, and thermal resistance were measured in the laboratory using mixtures generated through the response surface methodology (RSM). This RSM technique was used to assess the influence of gypsum (95% – 100%) and glass powder (0% – 5%) on the behavior of hardened plaster bricks. The experimental results and RSM evaluation show a

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Kropiwnicka, Anna, Beata Kowalewska-Jarosz, and Teresa Sierpińska. "Digital models and plaster casts in dental technology and orthodontics: A literature review." Prosthodontics 67, no. 1 (2017): 45–57. http://dx.doi.org/10.5604/00331783.1233261.

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Nowadays biotechnology can offer vast opportunities for maxillofacial surgery. The new prostheses and individual face implants can be produced at the chairside. A great problem for dental and maxillofacial surgeon is the reconstruction of lost bone. Bone loss may be caused by resorption, trauma or resection after surgical treatment of tumours. Rehabilitation of the majority of these patients requires a bone graft. Lack of general protocol and a multitude of materials used to rebuild bony tissue often makes it difficult to choose the best method. In the present study, xenograft of bovine bone g

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Dunajko, Monika. "THE STATUE OF CERES FROM THE ROYAL-UNIVERSITY COLLECTION OF PLASTER CASTS." Muzealnictwo 63 (May 17, 2022): 15–24. http://dx.doi.org/10.5604/01.3001.0015.8559.

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One of the more interesting collections of plaster prototypes, as yet not thoroughly studied, is the Warsaw collection of plaster casts. In the to-date studies it has been analysed from the perspective of history and history of art as a homogenous whole, a carrier of artistic culture. However, what is still missing are analyses focusing on basic facts as perceived by a museum curator, enabling identification of the objects composing the collection. The present paper aims at discussing the issues related to the identification of the works’ models and interpretation of works which come from univ

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Quinzi, Vincenzo, Simone Ettore Salvati, Valeria Brutto, Giorgia Tasciotti, Giuseppe Marzo, and Gianmaria Fabrizio Ferrazzano. "Comparison of the Accuracy of Two Transfer Caps in Positional Transmission of Palatal Temporary Anchorage Devices: An In Vitro Study." Dentistry Journal 11, no. 2 (2023): 51. http://dx.doi.org/10.3390/dj11020051.

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The aim of this study was to compare the positional information transfer accuracy of palatal temporary anchorage devices (TADs) of two different brands of transfer caps: PSM and Leone. Thirty plaster casts of maxillary dental arches were chosen for master models. A couple of Leone TADs were inserted in each master model. For each master model, two analysis models were created: using two transfer caps, Leone and PSM, the impressions were taken, the analogues were connected on the transfer caps, and the casts were poured. Using digital methods and equipment, such as a 3D scanner, a 3D analysis a

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Batista Pérez, Adriana, Domenica Estefania Torres León, Christian David Mendez Guevara, Nube Fernanda Moreno Orellana, and Manuel Estuardo Bravo Calderon. "DIGITAL ANALYSIS OF TOOTH SIZES AMONG INDIVIDUALS WITH DIFFERENT MALOCCLUSIONS: A STUDY USING THREE-DIMENSIONAL DIGITAL DENTAL MODELS." RECISATEC - REVISTA CIENTÍFICA SAÚDE E TECNOLOGIA - ISSN 2763-8405 4, no. 1 (2024): e41333. http://dx.doi.org/10.47820/recisatec.v4i1.333.

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The objective of the study was to examine the sizes of teeth, in digital models of patients with different malocclusions, with the help of three-dimensional measurement software. 68 digital models of 34 patients aged between 21 and 29 years were analyzed. A review was carried out to determine the participants according to Angle's classification, leaving 24 patients in the class I group and 10 patients in the class II group. Then, the patients' plaster models were scanned, using the Dentsply Sirona Cerec Omnicam Software 5.2 digital scanner, thus obtaining their digital format. NemoStudio-2022

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Ahmed, Naseer, Mohamad Syahrizal Halim, Ayesha Aslam, Zuryati Ab Ghani, Jawad Safdar, and Mohammad Khursheed Alam. "An Analysis of Maxillary Anterior Teeth Crown Width-Height Ratios: A Photographic, Three-Dimensional, and Standardized Plaster Model’s Study." BioMed Research International 2022 (February 7, 2022): 1–10. http://dx.doi.org/10.1155/2022/4695193.

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Objective. To analyze the width and height ratios of maxillary anterior teeth at different crown levels through photographs, 3D, and plaster dental model techniques in a subset of the Pakistani population. Material and Methods. This clinical study consisted of 230 participants. The maxillary impression, standardized photographs, and models were constructed for crown width and height analysis. The SPSS version 25 was used for statistical analysis. Descriptive statistics were carried out for mean, standard deviation, and percentage calculation of teeth width and height, gender, and age of partic

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Belov, Ihor, Maksym Vabishchevich, Oleh Dedov, and Oleh Skoruk. "Vibration monitoring of the state of preservation of historic buildings." Strength of Materials and Theory of Structures, no. 107 (October 29, 2021): 120–32. http://dx.doi.org/10.32347/2410-2547.2021.107.120-132.

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architectural monument. A technical inspection of the building was performed and existing defects were identified. The analysis of potential sources of dynamic influences on the building is carried out. The technique of experimental researches is developed. The technique is based on a systems approach and involves the determination of dynamic parameters with the location of sensors directly on the individual elements of the studied structures. During the study, records of continuous fixation of the distribution of active oscillations of the structure were used. Numerical values of

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Yoon, Jae Hee, Hyung-Seog Yu, Yoonjeong Choi, Tae-Hyun Choi, Sung-Hwan Choi, and Jung-Yul Cha. "Model Analysis of Digital Models in Moderate to Severe Crowding: In Vivo Validation and Clinical Application." BioMed Research International 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/8414605.

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Objective. We investigated the suitability of intraoral-scan models for measuring tooth dimensions and the amount of crowding in patients with severe tooth crowding. Materials and Methods. Fifty-eight patients who had undergone intraoral scans for diagnosis were included. Cast models were divided into two groups depending on the amount of crowding, as determined by initial caliper-based measurements (mild crowding [MC] group: <3.0 mm; severe crowding [SC] group: >4.5 mm). Twenty maxillary models and 20 mandibular models were used in this study. For the three types of models (i.e., IS dig

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