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Digital Intraoral Scanners Vs Traditional Impressions Fitting Accuracy Of Screwed Mesostructures
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Book Synopsis Digital Intraoral Scanners Vs Traditional Impressions- Fitting Accuracy of Screwed Mesostructures by : Carlesi Gian Luca
Download or read book Digital Intraoral Scanners Vs Traditional Impressions- Fitting Accuracy of Screwed Mesostructures written by Carlesi Gian Luca and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: TitleDigital intraoral scanners vs traditional impressions: Fitting accuracy of screwed mesostructuresBackgroundPassive fit and marginal precision of prosthetic structures on osteointegrated implants are a requirement to minimize tensions and to avoid loss of marginal bone and finally lack of osteointegration. The impression process is a primary step to obtain sufficient accuracy.We use daily intraoral scanners for impressions to made implant restorations from several years and we appreciate the clinical outcomes for passive fitting (cemented sovrastructures) and precision of screwed ones.AimThe aim of this job is to investigate the marginal accuracy of custom CoCr milled mesostructures on implants acquiring impressions by intraoral digital scanners and compare them to ones obtained bytraditional impressions systems and to evaluate if the misfit is within the optimal measure of 25-50u00b5m.Material and methodsTwo pair of implants were rigidly fixed in maxilla resin models. The first two implant were internal hexagonal flat connection implants made by Winsix implant system ( Biosaf In srl). The second two were internal octagonal conical connection implants made by Geass (Geass srl). Three impressions were took of each model. The first one was a traditional impression made by polyether material with the single impression technique. The other two impression was acquired using CS3500 Carestream Intraoral Scanner and Trios3 intraoral scanner. The digital impressions were made following factory recommendations for implant cases workflow.Milled CoCr screwed mesostructures were commissioned on the three impressions of each model.The aim was to analyze the misfit of the three mesostructures obtained using Sheffield test. The misfit was evaluated by a radiograph taken perpendicularly to the long axis of the implants. ImageJu00ae software was used to digitally process the radiographic images and perform the measurements. ResultsWe eliminate, using an artificial model some intraoral variables as blood, saliva, patient movements but we simulate the natural architecture of mouth maintaining crestal anatomy, gum, implant distance. We investigate the misfit radiographically performing the Scheffield test: in this way we screwed firmly only one screw of the mesostructure and we observe the matching of the other implant-structure connection.The bigger misfit was appreciate on the two mesostructures obtained by traditional impressions, one of them has failed to comply with the established gap limit of 50 u00b5m.Very good fitting, within the limit of 50 u00b5m was found on three mesostructures: The one made by impression with Carestream intraoral scanner CS3500 on winsix implantsand the two performed by Trios3 intraoral scanner 3Shapedental on Winsix implants and Geass Way implantsThe fitting accuracy of the last mesostructure made by impression performed on Geass Way implants with CS3500 scanner looks a middle way.ConclusionsThe misfit of all the mesostructures obtained by digital intraoral scanners seems to be in the safety range, avoiding structural tensions involving implant after screwing.This study confirm the fitting accuracy of milled mesostructures obtainable by digital intraoral impressions.We expected a more homogeneous results in the group of mesostructures obtained by digital impressions, poor number of mesostructures investigated may be the reason of the discrepancy.More data are indispensable to complete the results obtained and to investigate the real accuracy obtainable .
Book Synopsis A Comparison of Digital Intraoral Scanners and Alginate Impressions: Time & Patient Satisfaction by : Jennifer Ann Burzynski
Download or read book A Comparison of Digital Intraoral Scanners and Alginate Impressions: Time & Patient Satisfaction written by Jennifer Ann Burzynski and published by . This book was released on 2017 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: Impressions play an important role in dentistry and its specialties. Recent technological advances have made intraoral scans and digital models a possibility, and a promising alternative to conventional alginate impressions. Several factors should be examined when considering an intraoral scanner, including patient acceptance and efficiency. The objectives of this study were to assess and compare patient satisfaction and time required among two intraoral scanners and conventional alginate impressions. Methods: An initial pilot study was completed to create a valid and reliable survey instrument which would measure three areas of patient satisfaction with the impression experience. Following the survey development, the questionnaire was administered to orthodontic patients receiving one of three types of impressions, and the time required to obtain the impressions was recorded. Results: Reliability was evaluated with ICC values for 17 paired questionnaires, and all questions were found to be reliable (ICC = 0.65). For the main study, 180 subjects completed timed impressions and surveys. Data indicated that subjects receiving intraoral scans preferred the digital impressions while subjects receiving alginate impressions were neutral regarding impression preference, and that efficiency varied based on impression method. Conclusions: Intraoral scanners are accepted by orthodontic patients, and they have comparable efficiency to conventional impression methods depending on type of scanner.
Book Synopsis Evaluation of Digital Implant Impressions Using an Intra-oral Computerized Scanner (iTero) Versus Conventional Implant Impressions by : G. Kinga Baskai
Download or read book Evaluation of Digital Implant Impressions Using an Intra-oral Computerized Scanner (iTero) Versus Conventional Implant Impressions written by G. Kinga Baskai and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Intraoral Scanner, Printer, and Digital Analog System on the Accuracy of 3D Printed Models by :
Download or read book Effect of Intraoral Scanner, Printer, and Digital Analog System on the Accuracy of 3D Printed Models written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: BACKGROUND AND AIMThe clinical fit of an implant prosthesis at the implant-abutment junction is directly dependent on the accuracy of impression and cast. Digital workflow for producing implant-supported restorations involves the usage of intraoral scanners (IOS). From IOS data 3D printed master model is often fabricated using the selected type of digital analogs. There is a lack of data regarding the effects of IOS, 3D printer, and digital analog type effect on the local and global accuracy of digital analog positions in 3D printed master model. Moreover, errors arising in each step/stage should be identified. The aim of the study was to estimate the effect of IOS, two 3D printers and 2 digital analog systems on 3D positions of the digital analogs comparing reference, IOS and 3D printed model data sets. The null hypothesis was that there are no statistically significant differences between the data sets.MATERIALS AND METHODSTwo Straumann BLT 4.1 mm RC implants were inserted in the reference model (REF) left quadrant, in the location of second premolar and second molar with 5u00b0 angulation. Three calibration spheres of 5 mm in diameter (u00b11 u00b5m) where placed on the left quadrant at the model base. Scan bodies (3Shape) were attached to the implants and model was scanned with Nikon Altera 10.7.6. industrial scanner (REF-stl). REF model was scanned 10 times with E3 (3Shape) scanner for validation. Ten digital impressions were taken with 3Shape Trios3 intraoral scanner. The closes to the overall average or IOS impressions STL file (IOS-stl) was selected for 3D printing. Asiga MAX and Next Dent 5100 3D printers, ELOS Print Model Analog and NT-trading DIM-ANALOG were used to produce 4 groups (n=10 each) of 3D printed implant models. Later they were scanned with a validated E3 scanner (3D-print-stl). Distance, angulation, rotation, vertical shift measurements were performed using Geomagic Control X 2018 software.CONCLUSIONSAsiga MAX 3D printer performed more accurately than NextDent 5100. ELOS Print Model Analog showed most accurate results both locally and globally than NT trading. Intraoral scanning had significant influence in overall error propagation. Further studies are needed to evaluate other factors.
Book Synopsis Comparative in Vitro Study of the Accuracy of Impression Techniques for Dental Implants- Direct Technique with an Elastomeric Impression Material Versus Intraoral Scanner by : Cristina Rech
Download or read book Comparative in Vitro Study of the Accuracy of Impression Techniques for Dental Implants- Direct Technique with an Elastomeric Impression Material Versus Intraoral Scanner written by Cristina Rech and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The design and fabrication of implant-supported prosthetic structures requires the faithful reproduction of anatomical details and the correct positioning of the implants in the jaw. To do this, it is essential to take impressions using silicones or polyethers that will provide a working model that is as precise and exact as possible and will lead to a prosthetic structure with adequate passive fit.In recent years, the introduction of digital workflow has brought about a revolution in the field of dentistry, particularly in relation to the fabrication of prosthetic structures, whether tooth- or implant-supported. Digital techniques have allowed greater management of technical errors in metal-casting, making it easier to achieve a correct prosthetic fit. This study aimed to compare two impression techniques for analogue implants: the direct (or pick-up) technique with the elastomeric material polyether, and a digital scanner (True Definitionu00ae, 3Mu00ae ESPE: USA), in order to determine which is the more accurate technique. Twenty impressions were taken of a master model with each technique. Were measured the distances between contiguous analogues, intermittently positioned analogues and the most distal implants. Only significant differences were found between both techniques and the master model for the distance between distal analogues.After analizing the results of this study, for rehabilitations involving more than four implants, neither technique can be considered accurate although error falls within the tolerance limits established in the literature (30-150u00b5m).
Book Synopsis Comparison of the Accuracy of Different Impression Taking Techniques Using Different Types of Transferring Methods for Bone Level Implants by : George Iordanov Papanchev
Download or read book Comparison of the Accuracy of Different Impression Taking Techniques Using Different Types of Transferring Methods for Bone Level Implants written by George Iordanov Papanchev and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: BackgroundThe accuracy and final perfect stress free fit of the final implant restoration is dependent on various factors. But one of the most important is the creation of accurate model. The contemporary approach uses both digital and material impression taking procedures. And still there are a lot of unbeneficial factors that can alter the accuracy of final prosthesisAim/HypothesisThe purpose of the study is to evaluate the influence accuracy of three different impression taking methods for bone level implants compared to intraoral scanningMaterials and Methods38 implants were scanned using scan flags and a digital model was created using the TRIOS intraoral scanner. All the patients were divided into two groups. For group one of 20 implants were transferred using open transfers and an open stock tray impression was taken with double layer double phase C-silicon. For the other 18 implants a double layer single phase additive silicon impression was taken. For both groups was created additional 3D printed custom tray and an impression was taken with polyether. All impressions were cast with dental plaster fourth grade and were scanned with scan flags consistent with the implant system. A digital comparison was made for each group compared to the digital model, acquired from the intraoral scanning.Results Showed some significant discrepancy in the group with the wash technique and the condensational silicon, less discrepancies were found in the group with additive silicon, and almost no significant discrepancies were found in none of the implants transferred with 3D printed custom tray.Conclusion Using a 3D printed custom tray impression taking approach could be a successful alternative to intraoral scanning.
Book Synopsis Accuracy of Digital and Conventional Implant Impressions by : Bohner Lauren
Download or read book Accuracy of Digital and Conventional Implant Impressions written by Bohner Lauren and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to ensure a correct occlusion and fit of restorations, the accuracy of entire arch is required. In these cases, the quality of the dental cast relies on the digitizing and machining processes provided by CAD-CAM systems. As geometric errors may be introduced during the step of scanning and manufacturing of casts, their accuracy is still questionable.The purpose of this study was to compare the accuracy of casts obtained using digital and conventional implant impressions. A maxillary model containing dentalimplants on the region of canine and pre-molar was used as master model. Dental casts (n=10) were fabricated through both conventional and digital implant impressions. The conventional casts (CC), stereolithographic casts (SC) and the master model (MM) were digitized and the accuracy was determined through a deviation analysis and linear measurements. Data were analyzed using Student t-test and ANOVA with p=0.05. SC showed higher deviation at vestibular (CC: 41 u00b1 28; SC: 117 u00b1 37 u03bcm) and lingual cusps (CC: 40 u00b1 19; SC: 80 u00b1 42 u03bcm) in comparison to CC. No statistically significant difference was found for linear measurements of conventional and digital casts. The entire-arch accuracy was comparable between casts. However, in located points, stereolithographic casts were less accurate in comparison with conventional casts.
Book Synopsis Accuracy of Digital Models Acquired from Two Different Intraoral Scanners by : Jessie Marie Kierl
Download or read book Accuracy of Digital Models Acquired from Two Different Intraoral Scanners written by Jessie Marie Kierl and published by . This book was released on 2018 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparing the Accuracy of Intra-oral Scanners for Implant Level Impressions Using Different Scanable Abutments by : Nakul H. Rathi
Download or read book Comparing the Accuracy of Intra-oral Scanners for Implant Level Impressions Using Different Scanable Abutments written by Nakul H. Rathi and published by . This book was released on 2014 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: The calculated differences (mm3) were analyzed using a repeated-measures muiltifactorial ANOVA and Tukey-test, with an alpha level=0.05, with a non-directional alpha risk of 0.05. Post-hoc comparison was done showing all the possible combination of the variable types. Four actual CAD bars were milled through the CAM process and compared to the digital analysis.
Book Synopsis Accuracy of Various Intraoral Digital Impression Techniques by : Archontia Emmanouilidi
Download or read book Accuracy of Various Intraoral Digital Impression Techniques written by Archontia Emmanouilidi and published by . This book was released on 2020* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Accuracy of Implant Casts Generated with Conventional and Digital Impressions U2013 An in Vitro Study by : A. Ribeiro Paulo
Download or read book Accuracy of Implant Casts Generated with Conventional and Digital Impressions U2013 An in Vitro Study written by A. Ribeiro Paulo and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction: Studies demonstrated that the accuracy of intra-oral scanners can be compared with conventional impressions for most indications. However, little is known about their applicability to take impressions of multiple implants.Objective: compare the accuracy between digital impressions and different conventional printing techniques in implants in order to observe differences of the novel digital impression with the conventional techniques.Material and Methods: A stone cast of an edentulous mandible with 4 implants was fabricated to serve as master cast (control), two master models were made: one with parallel implants (Model 1)and another with uneven implants(Model 2). Model 1: 4 types of impressions were taken(Group A: tray impressions with reposition abutments; Group B: Open tray impression groups for dragging copings, without splinting; Group C: Open tray impressions for ferrules; Group D: Using 3M u2122 True Definition Scanner system).Model 2: 3 types of impressions were taken(Group E: tray impressions with reposition abutments; Group F: Open tray impression groups for dragging copings, without splinting; Group G: Using 3M u2122 True Definition Scanner system).Master casts and conventional impression casts were digitized with na extraoral high-resolution scanner. Standard tessellation language (STL)data sets from the seven groups of digital and conventional impressions were superimposed with the STL data set from the master cast to assess the 3D (global)deviations. To compare the master cast with digital and conventional impressions.Results: Statistical analysis was performed using the IBMu00ae SPSSu00ae Statistics Vs. 24, NY, USA.The normality of the distributions was analysed with an Kolmogorov-Smirnov test. The median comparison was performed using The differences between the median were analyzed using non-parametric Krustal-Wallis and Mann-Whitney tests with a significance level of p
Book Synopsis The Glossary of Prosthodontic Terms by :
Download or read book The Glossary of Prosthodontic Terms written by and published by . This book was released on 1994 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tissue-integrated Prostheses by : Per-Ingvar Brånemark
Download or read book Tissue-integrated Prostheses written by Per-Ingvar Brånemark and published by Quintessence Publishing (IL). This book was released on 1985 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: " This book provides the prosthodontist and oral surgeon for the first time with a safe, predictable, and scientifically proven method for permanently anchoring artificial tooth abutments in the jawbones. It combines the osseointegration research results of biologists, physicists, bioengineers, oral surgeons, and prosthodontists to demonstrate step-by-step how to achieve long-term osseointegration of dental implants" -- Amazon.
Book Synopsis Implant Prosthodontics by : Patrick J. Stevens
Download or read book Implant Prosthodontics written by Patrick J. Stevens and published by . This book was released on 2000 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: With 757 illustrations, IMPLANT PROSTHODONTICS provides a practical, illustrative manual on the construction of dental implants. It features a strong treatment planning emphasis and provides benefits and rationales for all laboratory and clinical facets. It also builds on the thorough coverage of the history of implants, the emergence of the Branemark system, and the evaluation of other dental implant systems while maintaining the practical and readable style peer reviewers and users have praised. * Provides thorough coverage of the history of implants, the emergence of the Branemark system, and the evaluation of other dental implant systems. * Features a strong treatment planning emphasis and provides benefits/rationales for all laboratory and clinical facets. * Maintains the practical and readable style peer reviewers and users have praised. * Includes 700 illustrations, all in full color, showing the reader proper procedures for dental implants. * Features highly respected author team of Drs. Patrick Stevens and Edward Fredrickson with dental ceramic expert Maurice Gress for the latest developments in implant prosthodontics. * Includes contribution from Dr. Fredrickson, the first US dentist in private practice to be trained in and to employ the Branemark system of osseointegrated dental implants for edentulous patients.
Book Synopsis Micro-computed Tomography (micro-CT) in Medicine and Engineering by : Kaan Orhan
Download or read book Micro-computed Tomography (micro-CT) in Medicine and Engineering written by Kaan Orhan and published by Springer. This book was released on 2019-07-25 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on applications of micro CT, CBCT and CT in medicine and engineering, comprehensively explaining the basic principles of these techniques in detail, and describing their increasing use in the imaging field. It particularly highlights the scanning procedure, which represents the most crucial step in micro CT, and discusses in detail the reconstruction process and the artifacts related to the scanning processes, as well as the imaging software used in analysis. Written by international experts, the book illustrates the application of micro CT in different areas, such as dentistry, medicine, tissue engineering, aerospace engineering, geology, material engineering, civil engineering and additive manufacturing. Covering different areas of application, the book is of interest not only to specialists in the respective fields, but also to broader audience of professionals working in the fields of imaging and analysis, as well as to students of the different disciplines.
Book Synopsis Digital Restorative Dentistry by : Faleh Tamimi
Download or read book Digital Restorative Dentistry written by Faleh Tamimi and published by Springer. This book was released on 2020-08-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers up-to-date, readily understandable guidance on the materials and equipment employed in digital restorative dentistry and on the specific clinical procedures that may be performed using the new technologies. The key components of digital restorative dentistry – image acquisition, prosthetic/restorative design, and fabrication – are fully addressed. Readers will find helpful information on scanners, the software for prosthetic design, and the materials and technologies for prosthesis fabrication, including laser sintering, 3D printing, CAD/CAM, and laser ablation. The section on clinical procedures explains all aspects of the use of digital technologies in the treatment of patients requiring removable partial dentures, complete dentures, fixed partial prostheses, crowns, endodontics, and implant surgery and prosthodontics. The field of restorative and prosthetic dentistry is undergoing rapid transition as these new technologies come to play an increasingly central role in everyday dental practice. In bridging the knowledge gap that this technological revolution has created in the field of dentistry, the book will satisfy the needs of both dentists and dental students.
Book Synopsis Dental Implant Materials 2019 by : In-Sung Yeo
Download or read book Dental Implant Materials 2019 written by In-Sung Yeo and published by MDPI. This book was released on 2021-03-17 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dental implant materials are advancing in the fusion of various scientific fields. Surface modification technologies for implants have been applied to titanium at the micro-level for about four decades. Now, implant surfaces are being topographically and chemically modified at both the micro- and nano-level. The modification techniques are altering other metals and ceramics, making these materials more biocompatible. Materials for abutments in dental implant systems appear to depend on implant–abutment connection structures. Biomechanical factors, such as friction and preload, influence the development of the abutment materials. Additionally, the surfaces of the abutment materials are important in the soft-tissue attachment, which is being actively investigated. As dental implants have to be functional in human bodies for a long time, numerous materials are being clinically tested as implant-supported restorations. The Special Issue, “Dental Implant Materials 2019”, introduces the creative works of scientists on the current advancements in the field of materials for implant dentistry.
