scholarly journals Computerized Casts for Orthodontic Purpose Using Powder-Free Intraoral Scanners: Accuracy, Execution Time, and Patient Feedback

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Maria Francesca Sfondrini ◽  
Paola Gandini ◽  
Maurizio Malfatto ◽  
Francesco Di Corato ◽  
Federico Trovati ◽  
...  
Keyword(s):  
Computer Software ◽  
Digital Impression ◽  
Processing Times ◽  
Patient Feedback ◽  
Intraoral Scanning ◽  
Digital Impressions ◽  
Titanium Dioxide Powder ◽  
Dioxide Powder ◽  
Digital Scanning ◽  
Conventional Impression

Introduction. Intraoral scanners allow direct images of oral situation, with fewer steps than conventional impressions. The purpose of this study was to compare the accuracy of digital impressions, traditional impressions, and digitalization of full-arch gypsum models, to evaluate timing of different methods and finally to study perception of patients about conventional and digital impression techniques. Methods. Dental arches of fourteen patients were evaluated by alginate impression, titanium dioxide powder-free intraoral scanning (Trios, 3Shape), and digitalization obtained from gypsum models using the same scanner. Conventional and digital techniques were evaluated through measurements (lower and upper arch anteroposterior length, lower and upper intercanine distance, and lower and upper intermolar distance) with a caliber for analogic models and using a computer software for digital models (Ortho Analyzer, Great Lakes Orthodontics). In addition, chairside and processing times were recorded. Finally, each patient completed a VAS questionnaire to evaluate comfort. Statistical analyses were performed with ANOVA and Tukey tests for accuracy measurements and paired t-test for times and VAS scores. Significance was predetermined at P<0.05. Results. The measurements obtained with intraoral scanning, gypsum models after conventional impression, and digitalized gypsum models were not significantly different. Both chairside and processing times of digital scanning were shorter than the traditional method. VAS reporting patients comfort were significantly higher when evaluating digital impression. Conclusions. Intraoral scanners used for orthodontic applications provide useful data in clinical practice, comparable to conventional impression. This technology is more time efficient than traditional impression and comfortable for patients. Further evolution with more accurate and faster scanners could in future replace traditional impression methods.

scholarly journals A New Method to Evaluate Trueness and Precision of Digital and Conventional Impression Techniques for Complete Dental Arch

2021 ◽  
Vol 11 (10) ◽  
pp. 4612
Author(s):  
KweonSoo Seo ◽  
Sunjai Kim
Keyword(s):  
Intraclass Correlation ◽  
Three Dimensional ◽  
New Method ◽  
Digital Impression ◽  
Dental Arch ◽  
Digital Models ◽  
Digital Impressions ◽  
Measuring Machine ◽  
Master Model ◽  
Conventional Impression

Purpose: The aim of this study was to present a new method to analyze the three-dimensional accuracy of complete-arch dental impressions and verify the reliability of the method. Additionally, the accuracies of conventional and intraoral digital impressions were compared using the new method. Methods: A master model was fabricated using 14 milled polyetheretherketone cylinders and a maxillary acrylic model. Each cylinder was positioned and named according to its corresponding tooth position. Twenty-five definitive stone casts were fabricated using conventional impressions of the master model. An intraoral scanner was used to scan the master model 25 times to fabricate 25 digital models. A coordinate measuring machine was used to physically probe each cylinder in the master model and definitive casts. An inspection software was used to probe cylinders of digital models. A three-dimensional part coordinate system was defined and used to compute the centroid coordinate of each cylinder. Intraclass correlation coefficient (ICC) was evaluated to examine the reliability of the new method. Independent two sample t-test was performed to compare the trueness and precision of conventional and intraoral digital impressions (α = 0.05). Results: ICC results showed that, the new method had almost perfect reliability for the measurements of the master model, conventional and digital impression. Conventional impression showed more accurate absolute trueness and precision than intraoral digital impression for most of the tooth positions (p < 0.05). Conclusions: The new method was reliable to analyze the three-dimensional deviation of complete-arch impressions. Conventional impression was still more accurate than digital intraoral impression for complete arches.

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 Clinical Acceptability of the Internal Gap of CAD/CAM PD-AG Crowns Using Intraoral Digital Impressions

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
Tae-Gyung Kim ◽  
Sungtae Kim ◽  
Hyunmin Choi ◽  
Jae-Hoon Lee ◽  
Jae-Hong Kim ◽  
...  
Keyword(s):  
Digital Impression ◽  
Digital Impressions ◽  
Significant Difference ◽  
Cad Cam ◽  
Cast Group ◽  
Group 10 ◽  
Internal Gap ◽  
Conventional Impression ◽  
Palladium Silver

The purpose of this study was to compare the internal gap between CAD/CAM palladium-silver crowns and cast gold crowns generated from intraoral digital versus conventional impressions and to determine the clinical acceptability. Nickel-chrome master dies were made from the prepared resin tooth with the conventional impression method (n=40). For ICC (Intraoral, CAD/CAM) group, 10 intraoral digital impressions were made, and 10 CAD/CAM crowns of a PD-AG (palladium-silver) machinable alloy were generated. For IC (Intraoral, Cast) group, 10 gold crowns were cast from ten intraoral digital impressions. For CCC (Conventional, CAD/CAM) group, 10 CAD/CAM PD-AG crowns were made using the conventional impression method. For CC (Conventional, Cast) group, 10 gold crowns were fabricated from 10 conventional impressions. One hundred magnifications of the internal gaps of each crown were measured at 50 points with an optical microscope and these values were statistically analyzed using a two-way analysis of variance (α=0.05). The internal gap of the intraoral digital impression group was significantly larger than in the conventional impression group (P<0.05). No significant difference was observed between the CAD/CAM group and the cast group (P>0.05). Within the limitations of this in vitro study, crowns from intraoral digital impressions showed larger internal gap values than crowns from conventional impressions.

scholarly journals Digital Impressions in Implant Dentistry: A Literature Review

2021 ◽  
Vol 18 (3) ◽  
pp. 1020
Author(s):  
Simone Marques ◽  
Paulo Ribeiro ◽  
Carlos Falcão ◽  
Bernardo Ferreira Lemos ◽  
Blanca Ríos-Carrasco ◽  
...  
Keyword(s):  
Literature Review ◽  
Digital Impression ◽  
Future Research ◽  
Hand Search ◽  
Scanning Technique ◽  
Digital Impressions ◽  
Digital Scanning ◽  
Implant Dentistry ◽  
Edentulous Patients ◽  
Ebsco Host

Introduction. Digital impressions in implant dentistry rely on many variables, and their accuracy, particularly in complete edentulous patients, is not well understood. Aim. The purpose of this literature review was to determine which factors may influence the accuracy of digital impressions in implant dentistry. Emphasized attention was given to the design of the intra-oral scan body (ISB) and scanning techniques. Materials and methods. A Medline, PubMed and EBSCO Host databases search, complemented by a hand search, was performed in order to select relevant reports regarding the appliance of digital impressions in implant dentistry. The search subject included but was not limited to accuracy of digital impressions in implant dentistry, digital scanning techniques, the design and material of the ISBs, and the depth and angulation of the implant. The related titles and abstracts were screened, and the remaining articles that fulfilled the inclusion criteria were selected for full-text readings. Results. The literature search conducted for this review initially resulted in 108 articles, among which only 21 articles fulfilled the criteria for inclusion. Studies were evaluated according to five subjects: accuracy of digital impressions in implant dentistry; the design and material of the intra-oral scan bodies; scanning technique; the influence of implants depth/angulations on the digital impression and accuracy of different intra-oral scanner devices. Conclusions. The accuracy of digital impressions in implant dentistry depends on several aspects. The depth/angulation of the implant, the experience of the operator, the intra-oral scanner used, and environmental conditions may influence the accuracy of digital impressions in implant dentistry. However, it seems that ISBs’ design and material, as well as scanning technique, have a major impact on the trueness and precision of digital impressions in implant dentistry. Future research is suggested for the better understanding of this subject, focusing on the optimization of the ISB design and scanning protocols.

scholarly journals CONVENTIONAL VS DIGITAL IMPRESSION TECHNIQUE FOR MANUFACTURING OF THREE-UNIT ZIRCONIA BRIDGES: CLINICAL TIME EFFICIENCY

2021 ◽  
Vol 27 (2) ◽  
pp. 3765-3771
Author(s):  
Kiril Gogushev ◽  
◽  
Metodi Abadjiev ◽  
Keyword(s):  
Soft Tissues ◽  
Digital Impression ◽  
Controlled Clinical Trial ◽  
Dental Arch ◽  
Manufacturing Companies ◽  
Impression Technique ◽  
Impression Materials ◽  
Digital Impressions ◽  
Time Required ◽  
Conventional Impression

Introduction: Taking an impression of the oral cavity, which accurately recreates the prosthetic field, the surrounding hard dental and soft tissues, is one of the main and most important stages in the process of making any fixed prosthetic restoration. In modern prosthetic dentistry, impressions taken with the help of polyether and vinyl polysiloxane impression materials are common. Digital impressions eliminate some of the steps of conventional impression techniques and save clinical time. Aim: The aim of this article is to compare the clinical time in digital and conventional impression techniques from a whole dental arch using a controlled clinical trial. Material and methods: The present study includes 36 patients from Varna who need prosthetic treatment with fixed 3-unit bridge construction. For all participants, the conventional impression technique was performed first and one week later - the digital one. All clinical manipulations related to the implementation of the two impression techniques were performed according to the instructions of the manufacturing companies by the same specialist dentist. Results: In all participants, the time required to perform the digital impression technique is significantly less than that of the conventional impression technique. Conclusion: The digital impression technique has proven to be more efficient in terms of clinical time required for its implementation than the conventional impression technique.

scholarly journals Digital versus Conventional Impression Taking Focusing on Interdental Areas: A Clinical Trial

2020 ◽  
Vol 17 (13) ◽  
pp. 4725
Author(s):  
Maximiliane Amelie Schlenz ◽  
Victoria Schubert ◽  
Alexander Schmidt ◽  
Bernd Wöstmann ◽  
Sabine Ruf ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Three Dimensional ◽  
Digital Impression ◽  
P Value ◽  
Digital Impressions ◽  
High Prevalence ◽  
The Absolute ◽  
True Definition ◽  
Conventional Impression ◽  
Tooth Migration

Due to the high prevalence of periodontitis, dentists have to face a larger group of patients with periodontally compromised dentitions (PCDs) characterized by pathologic tooth migration and malocclusion. Impression taking in these patients is challenging due to several undercuts and extensive interdental areas (IAs). The aim of this clinical trial was to analyze the ability of analog and digital impression techniques to display the IAs in PCDs. The upper and the lower jaws of 30 patients (n = 60, age: 48–87 years) were investigated with one conventional impression (CVI) using polyvinyl siloxane and four digital impressions with intraoral scanners (IOSs), namely True Definition (TRU), Primescan (PRI), CS 3600 (CAR), and TRIOS 3 (TIO). The gypsum models of the CVIs were digitalized using a laboratory scanner. Subsequently, the percentage of the displayed IAs in relation to the absolute IAs was calculated for the five impression techniques in a three-dimensional measuring software. Significant differences were observed among the impression techniques (except between PRI and CAR, p-value < 0.05). TRU displayed the highest percentage of IAs, followed by PRI, CAR, TIO, and CVI. The results indicated that the IOSs are superior to CVI regarding the ability to display the IAs in PCDs.

scholarly journals INTRAORAL SCANNING SYSTEMS - A CURRENT OVERVIEW

2020 ◽  
Vol 8 (10) ◽  
pp. 1214-1223
Author(s):  
Sheela Kannan ◽  
◽  
Chalakuzhiyil Abraham Mathew ◽  
Roseline Savarimuthu Paulraj ◽  
◽  
...  
Keyword(s):  
Review Article ◽  
Routine Procedure ◽  
Clinical Recommendations ◽  
Technology Generation ◽  
Intraoral Scanning ◽  
Digital Impressions ◽  
Near Future ◽  
Scanning Systems ◽  
Conventional Impression ◽  
A Current

Intraoral scanners (IOSs) are devices used for capturing direct optical impressions in dentistry. IOS eliminates the errors that are encountered with the conventional impression making procedures. The last decade has seen an increasing number of optical IOS devices, and these are based on different technologies. The objective of this review article is to discuss intraoral scanners with regards to its technology, generation systems, scanning paths, necessity of a powdering medium, accuracy (Trueness and precision), intermaxillary relationship registration, commercially available IOS, clinical recommendations, advantages, disadvantages, indications and contraindications. Digital impressions with IOS is likely going to be a routine procedure in dentistry in the near future.

scholarly journals Accuracy of photogrammetry, intraoral scanning, and conventional impression techniques for complete-arch implant rehabilitation: an in vitro comparative study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Bowen Ma ◽  
Xinxin Yue ◽  
Yujie Sun ◽  
Lingyan Peng ◽  
Wei Geng
Keyword(s):  
Digital Library ◽  
Intraoral Scanner ◽  
Intraoral Scanning ◽  
Impression Technique ◽  
Digital Impressions ◽  
Reference File ◽  
Implant Abutment ◽  
Laboratory Reference ◽  
Conventional Impression

Abstract Background To compare the accuracy of photogrammetry, intraoral scanning and conventional impression techniques for complete-arch implant rehabilitation. Methods A master cast containing 6 implant abutment replicas was fabricated. Group PG: digital impressions were taken 10 times using a photogrammetry system; Group IOS: intraoral scanning was performed to fabricate 10 digital impressions; Group CNV: splinted open-tray impression technique was used to fabricate 10 definitive casts. The master cast and conventional definitive casts were digitized with a laboratory reference scanner. For all STL files obtained, scan bodies were converted to implant abutment replicas using a digital library. The accuracy of a digitizer was defined by 2 main parameters, trueness and precision. "Trueness" was used to describe the deviation between test files and reference file, and "precision" was used to describe the closeness between test files. Then, the trueness and precision of three impression techniques were evaluated and statistically compared (α = 0.05). Results The median trueness was 24.45, 43.45 and 28.70 μm for group PG, IOS and CNV; Group PG gave more accurate trueness than group IOS (P < 0.001) and group CNV (P = 0.033), group CNV showed more accurate trueness than group IOS (P = 0.033). The median precision was 2.00, 36.00 and 29.40 μm for group PG, IOS and CNV; Group PG gave more accurate precision than group IOS (P < 0.001) and group CNV (P < 0.001), group CNV showed more accurate precision than IOS (P = 0.002). Conclusions For complete-arch implant rehabilitation, the photogrammetry system showed the best accuracy of all the impression techniques evaluated, followed by the conventional impression technique, and the intraoral scanner provided the least accuracy.

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 ◽  
Digital Impression ◽  
Scanning Time ◽  
Intraoral Scanning ◽  
Digital Impressions ◽  
The Difference

Abstract Background The spread of digital technology in dentistry poses new challenges and goals for dentists. It is important to involve new methods and devices in university education. The aim of the present in vivo study was to determine the learning curve of IOS 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® (Copenhagen, Denmark) IOS device. Each student took 10 digital impressions on volunteers (for standardization the first and the last patients was the same for each student). The inclusion criteria of patients were full dentition (except missing third molar) and no prosthetic- restorative treatment. Digital impression taking was preceded by a lecture consisting of two parts: education and training. For standardization, the scanning device was calibrated before impression taking, followed by the registration of patient data. 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 23min 9sec, for tenth impressions it was 15min 28sec. The difference between scanning time of the first and the tenth impressions was 7min 41sec. 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 The learning curve of IOS can be described with scanning time and image number of digital impression. Scanning time decreases 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 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 ◽  
Digital Impression ◽  
Scanning Time ◽  
Intraoral Scanning ◽  
Digital Impressions ◽  
The Difference

Abstract Background: The spread of digital technology in dentistry poses new challenges and goals for dentists. It is important to involve new methods and devices in university education. The aim of the present in vivo study was to determine the learning curve of IOS 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® (Copenhagen, Denmark) IOS device. Each student took 10 digital impressions on volunteers (for standardization the first and the last patients was the same for each student). The inclusion criteria of patients were full dentition (except missing third molar) and no prosthetic- restorative treatment. Digital impression taking was preceded by a lecture consisting of two parts: education and training. For standardization, the scanning device was calibrated before impression taking, followed by the registration of patient data. 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 23min 9sec, for tenth impressions it was 15min 28sec. The difference between scanning time of the first and the tenth impressions was 7min 41sec. 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: The learning curve of IOS can be described with scanning time and image number of digital impression. Scanning time decreases 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.

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