scholarly journals Intraoral Digital Impressions for Virtual Occlusal Records: Section Quantity and Dimensions

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Eneko Solaberrieta ◽  
Asier Garmendia ◽  
Aritza Brizuela ◽  
Jose Ramon Otegi ◽  
Guillermo Pradies ◽  
...  
Keyword(s):  
Spatial Position ◽  
Intraoral Scanner ◽  
Digital Impressions

The purpose of this study was to locate the 3D spatial position mandibular cast and determine its occlusal contacts in a novel way by using an intraoral scanner as part of the virtual occlusal record procedure. This study also analyzes the requirements in quantity and dimensions of the intraoral virtual occlusal record. The results showed that the best section combination consists of 2 lateral and frontal sections, the width of this section being that of 2 teeth (24 mm × 15 mm). This study concluded that this procedure was accurate enough to locate the mandibular cast on a virtual articulator. However, at least 2 sections of the virtual occlusal records were necessary, and the best results were obtained when the distance between these sections was maximum.

scholarly journals Elastic deformation of the mandibular jaw revisited—a clinical comparison between digital and conventional impressions using a reference

2021 ◽  
Author(s):  
Alexander Schmidt ◽  
Leona Klussmann ◽  
Maximiliane A. Schlenz ◽  
Bernd Wöstmann
Keyword(s):  
Statistical Analysis ◽  
Elastic Deformation ◽  
Clinical Relevance ◽  
Mouth Opening ◽  
Reference Structure ◽  
Intraoral Scanner ◽  
Digital Impressions ◽  
Normal Vectors ◽  
Mandibular Deformation ◽  
Conventional Impression

Abstract Objectives Due to the partly strongly differing results in the literature, the aim of the present study was to investigate a possible deformation of the mandible during mouth opening using an intraoral scanner (IOS) and a conventional impression for comparison with a reference aid. Materials and methods Four steel spheres were reversibly luted in the mandibular (n = 50) with a metallic reference aid at maximum mouth opening (MMO). Two digital impressions (Trios3), at MMO and at slightly mouth opening SMO and a conventional impression (Impregum), were taken as the measuring accuracy of the reference structure was already known. Difference between MMO-SMO for digital impressions and deviations between digital and conventional (SMO) were calculated. Furthermore, the angle between the normal vectors of two constructed planes was measured. Statistical analysis was performed with SPSS25. Results Deviations for linear distances ranged from −1 ± 3 μm up to 17 ± 78 μm (digital impressions, MMO-SMO), from 19 ± 16 μm up to 132 ± 90 μm (digital impressions, SMO), and from 28 ± 17 μm up to 60 ± 52 μm (conventional impressions, SMO). There were no significant differences for digital impressions (MMO-SMO), and there were significant differences between the conventional and digital impressions at SMO. Conclusions Based on the results of the present study, no mandibular deformation could be detected during mouth opening with regard to the digital impressions. The results were rather within the measuring tolerance of the intraoral scanner. Clinical relevance Based on the present study, no deformation of the mandibular during mouth opening could be observed at the level previously assumed. Therewith related, dental techniques related to a possible mandibular deformation therefore should be reconsidered.

Digital Impression taking for Maxillary Full-Arch Restoration with Immediate Loading. A Case Report.

2021 ◽  
Author(s):  
Jesús Peláez Rico ◽  
Jorge Cortés-Bretón Brinkmann ◽  
María Carrión Martín ◽  
Mabel Albanchez González ◽  
Celia Tobar Arribas ◽  
...  
Keyword(s):  
Acrylic Resin ◽  
Digital Impression ◽  
Immediate Loading ◽  
Clinical Report ◽  
Intraoral Scanner ◽  
Intraoral Scanning ◽  
Digital Impressions ◽  
Removable Prosthesis ◽  
And Function

The aim of this clinical report is to describe a maxillary full-arch implant supported restoration with immediate loading performed by means of an entirely digital workflow with photogrammetric system and intraoral scanning. A female patient with an edentulous maxillary arch attended the dental clinic seeking a maxillary fixed restoration. After treatment planning, six implants were placed using a surgical splint fabricated digitally by intraoral scanning of her previous removable prosthesis. Multi-unit abutments were fitted and two digital impressions were taken, one with a photogrammetric system for determining implant positions, and the other with an intraoral scanner for soft tissue registration. The acrylic resin structure of the immediate prosthesis was milled and placed within 8 hours of implant surgery. This provisional structure fitted correctly and provided adequate esthetics and function. Radiographic and clinical follow-up after 24 months observed adequate implant evolution.

scholarly journals Digital Denture Fabrication: A Technical Note

2021 ◽  
Vol 11 (17) ◽  
pp. 8093
Author(s):  
Shavkat Dusmukhamedov ◽  
Chu-Nui Lee ◽  
Seung-Mi Jeong ◽  
Byung-Ho Choi
Keyword(s):  
Technical Note ◽  
Digital Data ◽  
Complete Dentures ◽  
Intraoral Scanner ◽  
Denture Base ◽  
Digital Impressions ◽  
Fabrication Procedure ◽  
Conventional Manner ◽  
Digital Denture ◽  
Edentulous Jaws

Fabricating a complete denture in a conventional manner may be complicated and difficult. The purpose of this article was to describe the benefits of a fully digital workflow and fabrication procedure of complete dentures based on digital impressions of edentulous jaws. The digital data for the workflow were acquired using an intraoral scanner and were then used to design the denture base and teeth. The resulting data were exported to a 3D printer or a milling machine for denture fabrication.

Accuracy of Conventional and Digital Methods for Obtaining Dental Impressions and 3D Printed Models

2020 ◽  
Author(s):  
CAIO CÉSAR DIAS Resende ◽  
Tiago Augusto Quirino Barbosa ◽  
Guilherme Faria Moura ◽  
Lucas Nascimento Tavares ◽  
Fabio Antonio Piola Rizzante ◽  
...  
Keyword(s):  
3D Models ◽  
3D Printer ◽  
Test Results ◽  
Intraoral Scanner ◽  
Tukey Test ◽  
Digital Impressions ◽  
3D Printed ◽  
Digital Methods ◽  
Similar Accuracy ◽  
Conventional Impression

Abstract Background: Different sizes of arch could influence in digital methods to obtaining dental impressions and 3D models. The purpose of this study was to evaluate and compare the accuracy of two intra-oral scanners and conventional impression methods for the fabrication of working casts. Methods: Conventional impressions of a reference cast were obtained. Digital impressions were obtained with two intra-oral scanners: Cerec Omnicam (CO) and 3Shape Trios (ST). The obtained digital stereolithographic casts were printed on Zenith D 3D printer. The reference cast and fabricated casts were scanned with a bench top scanner and saved in STL format. All STL records were analyzed in specific software: complete arch (CA), partial arch (PA) and prepared teeth area (PT). One-way and two-way analyses of variance were performed to compare the accuracy, followed by the Tukey test. Results: No significant intergroup differences in trueness and precision were observed for the two intra-oral scanners. 3D printed casts had the lowest trueness when complete arch was analyzed and differed statistically from the stone cast. For complete arch precision, stone cast presented better results, however statistically different only from the CO. Conclusions: The two intraoral scanner systems had similar accuracy. Stone casts had higher trueness than 3D printed casts for CA. For CA precision, 3D printed cast presented similar results to the stone cast.

The Evaluation of Working Casts Prepared from Digital Impressions

2013 ◽  
Vol 38 (6) ◽  
pp. 655-662 ◽  
Author(s):  
YC Hwang ◽  
YS Park ◽  
HK Kim ◽  
YS Hong ◽  
JS Ahn ◽  
...  
Keyword(s):  
Measurement Error ◽  
Rapid Prototyping ◽  
Correlation Coefficient ◽  
Intraclass Correlation ◽  
Digital Impression ◽  
Milling Machine ◽  
Intraoral Scanner ◽  
Digital Impressions ◽  
Milling Machines ◽  
Excellent Reproducibility

SUMMARY Objective The aim of this study is to evaluate the reproducibility of working casts of a digital impression system by comparing them with the original, virtual, and rapid prototyping casts. Materials and Methods A total of 54 cast sets in clinically stable occlusion were used. They were scanned by an iTero intraoral scanner and converted into STL format virtual casts. Rapid prototyping casts and polyurethane casts were fabricated from the iTero milling system based on the virtual casts. Several horizontal and vertical measurements were performed from the four types of casts, that is, original stone casts, virtual casts, rapid prototyping casts, and polyurethane casts of iTero. Measurement error, intraclass correlation coefficient (ICC), and differences among the casts were calculated and compared. Results Casts from iTero milling machines exhibited greater dimensional differences and lower ICC values than did other casts. In addition, many of the measurements of the iTero working casts showed statistically significant differences in comparison to the three other types of casts. In contrast, there were no statistically significant differences between the virtual and original casts. Conclusion Virtual casts made by the iTero intraoral scanner exhibited excellent reproducibility. However, the casts from the iTero milling machine showed greater dimensional differences and lower reproducibility compared to other types of casts.

scholarly journals Learning curve of digital intraoral scanning – an in vivo study

2020 ◽  
Author(s):  
Ivett Róth ◽  
Alexandra Czigola ◽  
Gellért Levente Joós-Kovács ◽  
Magdolna Dalos ◽  
Péter Hermann ◽  
...  
Keyword(s):  
Learning Curve ◽  
Dental Students ◽  
First Impressions ◽  
In Vivo Study ◽  
Intraoral Scanner ◽  
Scanning Time ◽  
Intraoral Scanning ◽  
Digital Impressions ◽  
The Difference

Abstract Background: The spread of digital technology in dentistry poses new challenges and goals for dentists. The aim of the present in vivo study was to determine the learning curve of intraoral scanning described by (1) scanning time and (2) image number (count of images made by intraoral scanner during scanning process). Methods: Ten dental students of Semmelweis University, took part in the study. Dental students took digital study impressions using 3Shape Trios 3® (3Shape, Copenhagen, Denmark) intraoral scanning device. Each student took 10 digital impressions on volunteers (for standardization the first and the last volunteers was the same for each student). The inclusion criteria of volunteers were full dentition (except missing third molar) and no prosthetic- restorative treatment. Digital impression taking was preceded by a lecture consisting of two parts: theoretical education and practical training. Digital impressions were taken of the upper and lower arches, and the bite was recorded according to the manufacturer's instructions. Total scanning time and image number of intraoral scanning were recorded. Results: The difference of scanning time between the first and the tenth digital impressions was significant (p=0.007). The average scanning time of first impressions was 23 min 9 sec, for tenth impressions it was 15 min 28 sec. The difference between scanning time of the first and the tenth impressions was 7 min 41 sec. The average image number of the first impressions was 1964.5, for the tenth impressions it was 1468.6. The difference between number of images of the first and the tenth impressions was 495,9. The curve of image number show decreasing tendency first, then has a trough around the sixth measurement, and rises. Conclusion: Based on our results there was association between the sequential number of measurements and the outcome variables. The scanning time decreased because of the repetitive use of intraoral scanner. The image number first showed decreasing tendency and after sixth measurement it increased, there is no consistent decline in mean scanning picture. Scanning time decreased because the students move the scanning tip faster as result of practice. Shorter scanning times are accompanied by poorer coverage quality, the operator has to correct by adding extra images represented by the curve of image numbers which turning into increasing tendency after the sixth measurement. Trial registration: The permission for this study was given by the University Ethics Committee of Semmelweis University (SE TUKEB number: 61/2016).

scholarly journals DIGITAL DENTISTRY: AN OVERVIEW ON RECENT ADVANCEMENTS IN INTRAORAL SCANNER

2020 ◽  
Vol 8 (9) ◽  
pp. 1244-1250
Author(s):  
Suresh S. Kamble ◽  
◽  
Ajit S. Jankar ◽  
Vidya A. Vaybase ◽  
Suraj Sonawane ◽  
...  
Keyword(s):  
Conventional Technique ◽  
Scientific Data ◽  
Working Time ◽  
Accurate Data ◽  
Intraoral Scanner ◽  
Work Process ◽  
Digital Workflow ◽  
Digital Dentistry ◽  
Clinical Procedures ◽  
Digital Impressions

New devices are continuously introduced in the clinic and the dental laboratory. The first phase of the digital workflow is to obtain an image with the help of intra-oral scanner. These devices are replacing conventional impressions techniques with the digital scanners. Impressions which are recorded using scanners are more accurate as compared to conventional technique. Intra-oral scanners are time efficient, decrease the patient\'s discomfort and make clinical procedures easier. Over the last few years, there has been new advances in dental scanners for comprehension of computerized work process. Presently in market there are several brands of the scanners with better features to obtain digital impressions, to record the accurate Data in comfortable working time for the dentist and patient. Therefore, it is convenient to analyze the most used IOS systems based on the available scientific data.

scholarly journals Study of the dimensional accuracy of jaw models obtained by 3d printing using stereolithography

2020 ◽  
Vol 27 (1) ◽  
pp. 40-48
Author(s):  
Evgeny N. Zhulev ◽  
Yuliya A. Vokulova
Keyword(s):  
Digital Images ◽  
Digital Technologies ◽  
Dimensional Accuracy ◽  
High Dimensional ◽  
Rank Test ◽  
3D Printer ◽  
Intraoral Scanner ◽  
Digital Impressions ◽  
Plaster Models ◽  
Wilcoxon Rank Test

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 nonparametric Wilcoxon rank test was used for statistical analysis of the obtained data.Results. It is established that jaw models made of DETAX Freeprint model UV photopolymer using an Asiga Max UV 3D printer, based on digital impressions obtained by an iTero Cadent intraoral scanner, have a greater dimensional accuracy in comparison with plaster jaw models obtained from single-stage double-layer A-silicone impressions by 31.6% with a signifi cance level p < 0.05.Conclusion. Jaw models created using an Asiga Max UV 3D printer are characterized by high dimensional accuracy as compared to plaster models. 

scholarly journals Conventional Vs Digital Impressions: Acceptability, Treatment Comfort and Stress Among Young Orthodontic Patients

2018 ◽  
Vol 12 (1) ◽  
pp. 118-124 ◽  
Author(s):  
Alessandro Mangano ◽  
Matteo Beretta ◽  
Giuseppe Luongo ◽  
Carlo Mangano ◽  
Francesco Mangano
Keyword(s):  
State Anxiety ◽  
The State ◽  
Anxiety Scale ◽  
Previous Experience ◽  
Intraoral Scanner ◽  
Impression Material ◽  
Impression Technique ◽  
Digital Impressions ◽  
Orthodontic Patients ◽  
Conventional Impression

Objective: The objective of the present study was to compare patients’ acceptability, comfort and stress with conventional and digital impressions. Materials and Methods: Thirty young orthodontic patients (15 males and 15 females) who had no previous experience of impressions were enrolled in this study. Conventional impressions for orthodontic study models of the dental arches were taken using an alginate impression material (Hydrogum®, Zhermack Spa, Badia Polesine, Rovigo, Italy). Fifteen days later, digital impressions of both arches were acquired using an intraoral scanner (CS3600®, Carestream Dental, Rochester, NY, USA). Immediately after impression taking, patients’ acceptability, comfort and stress were measured using two questionnaires and the State anxiety scale. Results: Data showed no difference in terms of anxiety and stress; however, patients preferred the use of digital impressions systems instead of conventional impression techniques. Alginate impressions resulted as fast as digital impressions. Conclusions: Digital impressions resulted the most accepted and comfortable impression technique in young orthodontic patients, when compared to conventional techniques.

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