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Journal articles on the topic 'Plaster Models'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Williams, Brian. "Superb 1950s plaster models." British Dental Journal 232, no. 6 (2022): 365. http://dx.doi.org/10.1038/s41415-022-4118-9.

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Dai, Jiewen, Guanghong Hu, Xudong Wang, et al. "CBCT Combining With Plaster Models." Journal of Craniofacial Surgery 23, no. 6 (2012): 1759–62. http://dx.doi.org/10.1097/scs.0b013e318264607e.

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3

Papo, A. "Rheological models for gypsum plaster pastes." Rheologica Acta 27, no. 3 (1988): 320–25. http://dx.doi.org/10.1007/bf01329748.

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4

van Broekhuizen, Dick. "The Plaster Trace: Reading Creative Processes." Amsterdam Museum Journal 2, no. 2 (2024): 46–65. https://doi.org/10.61299/re874vhe.

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One can read the creative and making processes in the plaster models left by the sculptor. Hans/Jean Arp and Mari Andriessen provide excellent examples in the Gipsotheek collection (Museum Beelden aan Zee). Although Andriessen and Arp had very different sculptural ideas, their creative and making methods were sometimes similar: working in models, reworking, taking parts they liked and reintegrating them into other models. Of course, they ended up with very different results. The plaster sculptures are mostly steppingstones on the way to a final sculpture. This emphasizes the flexibility of pla

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5

Kim, Jooseong, Giseon Heo, and Manuel O. Lagravère. "Accuracy of laser-scanned models compared to plaster models and cone-beam computed tomography." Angle Orthodontist 84, no. 3 (2013): 443–50. http://dx.doi.org/10.2319/051213-365.1.

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ABSTRACT Objective: To compare the accuracy of measurements obtained from the three-dimensional (3D) laser scans to those taken from the cone-beam computed tomography (CBCT) scans and those obtained from plaster models. Materials and Methods: Eighteen different measurements, encompassing mesiodistal width of teeth and both maxillary and mandibular arch length and width, were selected using various landmarks. CBCT scans and plaster models were prepared from 60 patients. Plaster models were scanned using the Ortho Insight 3D laser scanner, and the selected landmarks were measured using its softw

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Shafaee, Hooman, Fahimeh Farzanegan, Bahareh Yaloodbardan, Seyed Hosein Hoseini Zarch, and Abdolrasoul Rangrazi. "Comparison of dental dimensions in models developed with digital procedures and plaster models." Journal of Oral Research 13, no. 1 (2024): 15–25. http://dx.doi.org/10.17126/joralres.2024.002.

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Aim: This study aimed to collect evidence on the validity and reliability of measurements obtained from digital impression techniques. Materials and Methods: This comparative study was conducted on 31 patients. Intraoral scanner was applied to all patients. For each patient, an alginate impression of the upper maxilla was taken and later the 3D digital model was extracted by dental cone-beam computed tomography (CBCT). For preparation of plaster models, alginate impressions were taken and immediately poured with dental stone. In the next stage, a comparison was performed among the intraoral sc

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Gül Amuk, Nisa, Erol Karsli, and Gokmen Kurt. "Comparison of dental measurements between conventional plaster models, digital models obtained by impression scanning and plaster model scanning." International Orthodontics 17, no. 1 (2019): 151–58. http://dx.doi.org/10.1016/j.ortho.2019.01.014.

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Camardella, Leonardo Tavares, Oswaldo V. Vilella, Marleen M. van Hezel, and Karel H. Breuning. "Accuracy of stereolithographically printed digital models compared to plaster models." Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie 78, no. 5 (2017): 394–402. http://dx.doi.org/10.1007/s00056-017-0093-1.

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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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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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Orozco, Odell Ali Chávez, Olivia Hernández Molina, and Cristóbal Landa Román. "Alginate Brand Comparison: A Study on Measurement and Hydration." EAS Journal of Dentistry and Oral Medicine 6, no. 06 (2024): 111–16. http://dx.doi.org/10.36349/easjdom.2024.v06i06.004.

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Alginate, discovered in 1881 by British chemist E.C.C. Stanford, is a polysaccharide isolated from seaweed. Since its introduction into dentistry in 1940, it has been used as an impression material due to its hydrophilic and hydrophobic properties, which allow dimensional changes during impression and solidification. For optimal impression, type 3 plaster is recommended, which presents lower expansion and longer setting time, ensuring dimensional accuracy. In addition, the stability of the dental model is crucial, including mechanical and dimensional strength. Plastic and metal trays offer dif

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12

Callahan, Chad, P. Lionel Sadowsky, and André Ferreira. "Diagnostic Value of Plaster Models in Contemporary Orthodontics." Seminars in Orthodontics 11, no. 2 (2005): 94–97. http://dx.doi.org/10.1053/j.sodo.2005.04.001.

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13

Gascoigne, H. E. "PLASTER AND WAX MOLDS FOR CASTING PHOTOELASTIC MODELS." Experimental Techniques 11, no. 10 (1987): 27–29. http://dx.doi.org/10.1111/j.1747-1567.1987.tb00624.x.

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14

Jacobson, Alex. "Diagnostic value of plaster models in contemporary orthodontics." American Journal of Orthodontics and Dentofacial Orthopedics 129, no. 1 (2006): 82. http://dx.doi.org/10.1016/j.ajodo.2005.05.020.

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Torassian, Gilda, Chung How Kau, Jeryl D. English, et al. "Digital models vs plaster models using alginate and alginate substitute materials." Angle Orthodontist 80, no. 4 (2010): 662–69. http://dx.doi.org/10.2319/072409-413.1.

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16

Lümkemann, Nina, Melisa Klimenta, Moritz Hoffmann, John Meinen, and Bogna Stawarczyk. "Dimensional Stability and Reproducibility of Varying FFF Models for Aligners in Comparison to Plaster Models." Materials 16, no. 13 (2023): 4835. http://dx.doi.org/10.3390/ma16134835.

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To test the impact of FFF filaments, printing parameters, thermoforming foils, repeated thermoforming cycles, and type of jaw on the dimensional stability of FFF models for aligners and to compare them with plaster models, FFF models (maxilla, n = 48; mandible, n = 48) from two filaments (SIMPLEX aligner and Renfert PLA HT, both Renfert GmbH) were fabricated using four printing parameters (one, two, or three loops; four loops acted as the default) and conventional plaster models (n = 12) based on a young, female dentition. All models were thermoformed under pressure three times in total using

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17

Gunel, Rukiye, Merve Göymen, Aysegul Gulec, and Guzin Bilgin Buyuknacar. "Comparison of Measurements on Conventional Plaster Model and Computer-Aided Digital Dental Models." European Journal of Therapeutics 31, no. 1 (2025): 11–18. https://doi.org/10.58600/eurjther2550.

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Objective: The objective of the present study was to examine the veracity and precision of measurements obtained from plaster models and digital models of subjects presenting with different malocclusion patterns. Methods: A total of 68 orthodontic patients, who had requested treatment were randomly selected and included in the study and classified as Class I (n=20), Class II (n=20) and Class III (n=18). The first group underwent an alginate impression procedure, which involved taking measurements from both the upper and lower jaws. Subsequently, plaster models were created through the casting

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Almudhi, Abdullazez, Iman Almohammad, Sara Alswayyed, Elzahraa Eldwakhly, and Sarah Almugairin. "The Efficacy of Diagnostic Plaster Models in Orthodontic Diagnosis and Treatment Planning." Diagnostics 14, no. 19 (2024): 2124. http://dx.doi.org/10.3390/diagnostics14192124.

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Background: The growing integration of digital technologies in orthodontics is shifting the orthodontic diagnosis and recordkeeping paradigm, replacing conventional plaster models with intraoral scanning and 3D photography. This study investigated the impact of orthodontic plaster models on orthodontic diagnosis and treatment planning decisions by orthodontists. Methods: Thirty-three orthodontists assessed six patients’ records with different malocclusion cases. Each case was assessed twice by each orthodontist evaluating a case: the first evaluation with digital records without diagnostic cas

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19

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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20

Camardella, Leonardo Tavares, Hero Breuning, and Oswaldo de Vasconcellos Vilella. "Are there differences between comparison methods used to evaluate the accuracy and reliability of digital models?" Dental Press Journal of Orthodontics 22, no. 1 (2017): 65–74. http://dx.doi.org/10.1590/2177-6709.22.1.065-074.oar.

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ABSTRACT Objectives: The accuracy and reliability of plaster models and digital models acquired with two different surface laser scanners were tested by means of three methods: measurement with calipers, digital measurement with proper software and superimposition of the digital models. Methods: Thirty plaster models with permanent dentition that met the inclusion criteria were selected and scanned with two laser scanners (R700 and Xcad). Three examiners measured distances on plaster models with a digital caliper and on digital models using Ortho Analyzer software. The digital models were also

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21

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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22

Reuschl, Ralph Philip, Wieland Heuer, Meike Stiesch, Daniela Wenzel, and Marc Philipp Dittmer. "Reliability and validity of measurements on digital study models and plaster models." European Journal of Orthodontics 38, no. 1 (2015): 22–26. http://dx.doi.org/10.1093/ejo/cjv001.

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23

Rebong, Raymund E., Kelton T. Stewart, Achint Utreja, and Ahmed A. Ghoneima. "Accuracy of three-dimensional dental resin models created by fused deposition modeling, stereolithography, and Polyjet prototype technologies: A comparative study." Angle Orthodontist 88, no. 3 (2018): 363–69. http://dx.doi.org/10.2319/071117-460.1.

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ABSTRACT Objectives: The aim of this study was to assess the dimensional accuracy of fused deposition modeling (FDM)–, Polyjet-, and stereolithography (SLA)–produced models by comparing them to traditional plaster casts. Materials and A total of 12 maxillary and mandibular posttreatment orthodontic plaster casts were selected from the archives of the Orthodontic Department at the Indiana University School of Dentistry. Plaster models were scanned, saved as stereolithography files, and printed as physical models using three different three-dimensional (3D) printers: Makerbot Replicator (FDM), 3

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24

Littlefield, Timothy R., Jennifer C. Cherney, Jerry N. Luisi, Stephen P. Beals, Kevin M. Kelly, and Jeanne K. Pomatto. "Comparison of Plaster Casting with Three-Dimensional Cranial Imaging." Cleft Palate-Craniofacial Journal 42, no. 2 (2005): 157–64. http://dx.doi.org/10.1597/03-145.1.

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Objective The development of a new cranial imaging system to capture a three-dimensional (3D) model of an infant's head has been previously reported. The accuracy of this new system has been independently established. However, before replacing the traditional plaster casting technique, the two methods require a comparison to ensure that the models they produce are equivalent. Methods Ten sequential infants were digitized by the 3D imaging system and the plaster casting technique following previously reported protocols. The cast models were also digitized so they could be compared with the digi

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25

Santoro, Margherita, Scott Galkin, Monica Teredesai, Olivier F. Nicolay, and Thomas J. Cangialosi. "Comparison of measurements made on digital and plaster models." American Journal of Orthodontics and Dentofacial Orthopedics 124, no. 1 (2003): 101–5. http://dx.doi.org/10.1016/s0889-5406(03)00152-5.

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26

Chen, C. S. K., J. Chaison, H. T. Yau, C. Y. Hsu, and A. M. Bollen. "Comparing Laser and CBCT in Scanning Plaster Dental Models." Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology 105, no. 4 (2008): e51. http://dx.doi.org/10.1016/j.tripleo.2007.12.055.

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27

Mullen, S. Russell, Chris A. Martin, Peter Ngan, and Marcia Gladwin. "Accuracy of space analysis with emodels and plaster models." American Journal of Orthodontics and Dentofacial Orthopedics 132, no. 3 (2007): 346–52. http://dx.doi.org/10.1016/j.ajodo.2005.08.044.

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El-Zanaty, Hend Mohammed, Amr Ragab El-Beialy, Amr Mohammed Abou El-Ezz, Khaled Hazem Attia, Ahmed Ragab El-Bialy, and Yehya Ahmed Mostafa. "Three-dimensional dental measurements: An alternative to plaster models." American Journal of Orthodontics and Dentofacial Orthopedics 137, no. 2 (2010): 259–65. http://dx.doi.org/10.1016/j.ajodo.2008.04.030.

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Taplin, John H. "Kinetic models for the setting of plaster of paris." Journal of Applied Chemistry and Biotechnology 23, no. 5 (2007): 349–55. http://dx.doi.org/10.1002/jctb.5020230506.

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30

Hassan, Nurul Huda, BudiAslinie Md. Sabri, and Mohamed Ibrahim Abu Hassan. "Accuracy of In-Vivo Digital Impressions of Complete Arch with Intraoral Scanner Vs Conventional Impression - A Review." Journal of Evolution of Medical and Dental Sciences 11, no. 1 (2022): 283–92. http://dx.doi.org/10.14260/jemds/2022/53.

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BACKGROUND We intend to evaluate the accuracy of in vivo conventional and digital methods in generating complete-arch dental models for measuring tooth dimension. METHODS Search was conducted through an electronic database in Medline, Cochrane Library, ResearchGate, PubMed and Google Scholar using query terms such as intraoral scanning; digital impression; accuracy in vivo full arch digital impression; analog impression; accuracy conventional impression; in vivo intraoral scanning; alginate impression; accuracy of plaster models; digital models; and complete arch accuracy. The outcomes were th

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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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Leung, Chung-Yan Vanessa, Yanqi Yang, Chongshan Liao, et al. "Digital Models as an Alternative to Plaster Casts in Assessment of Orthodontic Treatment Outcomes." Scientific World Journal 2018 (June 12, 2018): 1–5. http://dx.doi.org/10.1155/2018/9819384.

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Objective. This study aimed to compare the use of digital models and plaster casts in assessing the improvement in occlusion following orthodontic treatment. Materials and Methods. Digital models and plaster casts of 39 consecutive patients at pre- and posttreatment stages were obtained and assessed using the Peer Assessment Rating (PAR) index and the Index of Complexity and Treatment Need (ICON). PAR and ICON scores were compared at individual and group levels. Categorization of improvement level was compared using Kappa (κ) statistics. Results. There was no significant difference in neither

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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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Fleming, PS, V. Marinho, and A. Johal. "Orthodontic measurements on digital study models compared with plaster models: a systematic review." Orthodontics & Craniofacial Research 14, no. 1 (2010): 1–16. http://dx.doi.org/10.1111/j.1601-6343.2010.01503.x.

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Lores-Chavez, Isabella. "The Plaster Cast and the Intimacy of the Studio." Ge-conservacion 23, no. 1 (2023): 120–28. http://dx.doi.org/10.37558/gec.v23i1.1214.

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In the seventeenth century, plaster casts, which were essential sources of inspiration and instruction, became a recurring motif in images of Dutch painters’ workspaces, a marker of both intellectual and manual labor. Painters used plaster casts to proclaim their erudite knowledge of antiquity and of Renaissance sculpture that emulated ancient models. Plaster casts also provided a means for ambitious painters to communicate their personal and aspirational ties to other masters. The presence of plaster casts in archival records along with painted depictions of the studio provide insights into t

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Devoy, Louise E. "Lunar Crater Models." Nuncius 35, no. 2 (2020): 300–332. http://dx.doi.org/10.1163/18253911-03502006.

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Abstract This article traces the story of three amateur astronomers who created relief models to help them depict the changing illumination of certain lunar craters, examples of which can be found in UK museum collections today. English chemist Henry Blunt (1806–1853) adopted the emerging technology of electrotyping to reproduce and distribute his plaster model of the Eratosthenes crater to a wider audience. Scottish industrial engineer James Nasmyth (1808–1890) used a combination of drawing, modelling and photography to support his thesis on the volcanic origin of lunar craters in his popular

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Dmitrienko, Dmitry S., Vladimir V. Shkarin, Igor V. Fomin, and Tatyana D. Dmitrienko. "Clinical possibilities of applying the method of photostatic biometrics of plaster models of jaws." Journal of Volgograd State Medical University 20, no. 4 (2024): 49–53. http://dx.doi.org/10.19163/1994-9480-2023-20-4-49-53.

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The development of modern methods of biometrics is an urgent task of clinical dentistry. Aim. To determine the clinical possibilities of applying the method of photostatic biometrics of plaster models of jaws. Material and methods. A retrospective study was conducted on 46 pairs of plaster jaw models with physiological occlusion. Biometrics of jaw models from plaster was carried out according to generally accepted methods. The method of photostatic biometrics of jaw models is based on photographing models with a ruler for the convenience of subsequent scaling. The photo was marked with l

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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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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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Nocar, Adam, Aleš Procházka, Magdaléna Kloubcová, Pavel Hyšpler, Martin Schatz, and Tatjana Dostálová. "A Three-Year Prospective Study Comparing Stereolithography Printed Models to Classical Impression and Plaster Cast Models in Orthodontic Therapy: A 3D Objectification Approach." Applied Sciences 13, no. 13 (2023): 7542. http://dx.doi.org/10.3390/app13137542.

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The integration of computational intelligence and augmented reality has become increasingly prevalent in dental practices. Three-dimensional (3D) printing techniques have now become routine in orthodontics, prosthetics, and maxillofacial surgery. The objective of this study is to assess the effectiveness of stereolithography (SLA) printed models compared to traditional plaster casts over a three-year period. The experimental dataset consisted of 36 orthodontic patients, each with SLA printed models and plaster casts for both the upper and lower jaws, resulting in a total of 72 scans in the for

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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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Katbeh, I., T. F. Kosyreva, N. S. Tuturov, and A. S. Birukov. "Optimization of Dentition Measurements in Orthodontic Practice." RUDN Journal of Medicine 23, no. 4 (2019): 373–80. http://dx.doi.org/10.22363/2313-0245-2019-23-4-373-380.

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Orthodontic treatment planning is a practice that depends on the accuracy of teeth and dental arches’ size measurement. The purpose of the study is to compare the accuracy and the duration of teeth and dental arches’ measurement, utilizing different approaches from conventional plaster models to virtual 3D models obtained by intraoral and extraoral scanners. Fifteen patients were included in the study (7 males, 8 females, mean age 21.7 ± 0.7 years), with a moderate anterior teeth crowding and class I Angle’s classification of malocclusion. Plaster models, as well as virtual 3D scans were obtai

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Friedman, Michael. "Paper, Plaster, Strings: Exploratory Material Mathematical Models between the 1860s and 1930s." Perspectives on Science 29, no. 4 (2021): 436–67. http://dx.doi.org/10.1162/posc_a_00378.

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Abstract Does the materiality of a three-dimensional model have an effect on how this model operates in an exploratory way, how it prompts discovery of new mathematical results? Material mathematical models were produced and used during the second half of the nineteenth century, visualizing mathematical objects, such as curves and surfaces—and these were produced from a variety of materials: paper, cardboard, plaster, strings, wood. However, the question, whether their materiality influenced the status of these models—considered as exploratory, technical, or representational—was hardly touched

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Convery, P., A. W. P. Buis, R. Wilkie, S. Sockalingam, A. Blair, and B. McHugh. "Measurement of the consistency of patellar-tendon-bearing cast rectification." Prosthetics and Orthotics International 27, no. 3 (2003): 207–13. http://dx.doi.org/10.1080/03093640308726683.

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The quality of fit of a trans-tibial patellar-tendon-bearing (PTB) socket may be influenced by consistency in casting, rectification or alignment. This paper quantifies, for the first time, the variations in the rectified casts between two experienced prosthetists and the variation between the rectified casts of each individual prosthetist. Prosthetists A and B observed the hand casting of a typical trans-tibial amputee. Each prosthetist was supplied with 5 previously measured duplicated plaster models. The two prosthetists rectified the supplied plaster models based on their own interpretatio

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Knell, Simon. "CING 22. Wisbech and Fenland Museum." Geological Curator 4, no. 6 (1986): 352. http://dx.doi.org/10.55468/gc296.

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Wisbech and Fenland Museum holds much of interest. The collection includes a great many plaster and lead dinosaur and mammal models. The plaster dinosaur models are apparently exact replicas of those reconstructed by Waterhouse Hawkins at Crystal Palace, under the direction of Richard Owen, in 1852-1854. They range in size up to about 40cm long (Figs. 1, 2) and are constructed in plaster, probably from moulds, with crests inset in lead. In addition there are some lead mammals and marine reptiles of various sizes - the ichthyosaurs also appear to be replicas of the Crystal Palace models and bea

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Abizadeh, Neilufar, David R. Moles, Julian O’Neill, and Joseph H. Noar. "Digital versus plaster study models: How accurate and reproducible are they?" Journal of Orthodontics 39, no. 3 (2012): 151–59. http://dx.doi.org/10.1179/1465312512z.00000000023.

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Pereira, Jefferson Ricardo, Karina Yumi Murata, Accácio Lins do Valle, Janaina Salomon Ghizoni, and Fábio Kenji Shiratori. "Linear dimensional changes in plaster die models using different elastomeric materials." Brazilian Oral Research 24, no. 3 (2010): 336–41. http://dx.doi.org/10.1590/s1806-83242010000300013.

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Ko, Hsiu-Ching, Weitao Liu, Derek Hou, Sepideh Torkan, Charles Spiekerman, and Greg J. Huang. "Agreement of treatment recommendations based on digital vs plaster dental models." American Journal of Orthodontics and Dentofacial Orthopedics 155, no. 1 (2019): 135–42. http://dx.doi.org/10.1016/j.ajodo.2018.03.018.

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Shumkov, A. A., T. R. Ablyaz, and K. R. Muratov. "Assessing the Surface Distortion of Plaster Molds Made with the Use of SLA Models." Archives of Foundry Engineering 17, no. 3 (2017): 123–26. http://dx.doi.org/10.1515/afe-2017-0103.

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Abstract The method of determining the accuracy of polymer molds in plaster forms has been discussed. Distortion of the surface of molds and plaster molds has been assessed. It has been found that the presence of monolithic and porous structure in the samples does not change the accuracy of the surfaces when forms are prepared for removing the material of the model. It has been found that in case of full-mold casting it is more expedient to form the mold cavity with cellular adjustable structures of molding prototypes.

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