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https://www.readbyqxmd.com/read/28076661/impression-techniques-used-for-single-unit-crowns-findings-from-the-national-dental-practice-based-research-network
#1
Michael S McCracken, David R Louis, Mark S Litaker, Helena M Minyé, Thomas Oates, Valeria V Gordan, Don G Marshall, Cyril Meyerowitz, Gregg H Gilbert
PURPOSE: To: (1) determine which impression and gingival displacement techniques practitioners use for single-unit crowns on natural teeth; and (2) test whether certain dentist and practice characteristics are significantly associated with the use of these techniques. MATERIALS AND METHODS: Dentists participating in the National Dental Practice-Based Research Network were eligible for this survey study. The study used a questionnaire developed by clinicians, statisticians, laboratory technicians, and survey experts...
January 11, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28074260/accuracy-and-reproducibility-of-measurements-on-plaster-models-and-digital-models-created-using-an-intraoral-scanner
#2
Leonardo Tavares Camardella, Hero Breuning, Oswaldo de Vasconcellos Vilella
AIM: The purpose of the present study was to evaluate the accuracy and reproducibility of measurements made on digital models created using an intraoral color scanner compared to measurements on dental plaster models. METHODS: This study included impressions of 28 volunteers. Alginate impressions were used to make plaster models, and each volunteers' dentition was scanned with a TRIOS Color intraoral scanner. Two examiners performed measurements on the plaster models using a digital caliper and measured the digital models using Ortho Analyzer software...
January 10, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28072987/-a-pilot-clinical-study-of-immediate-provisionalization-with-a-chairside-computer-aided-design-and-computer-aided-manufacture-monolithic-crown-for-single-tooth-immediate-implant-placement
#3
J H Tian, P Di, Y Lin, Y Zhang, D H Wei, H Y Cui
Objective: To evaluate the primary clinical outcomes of immediate provisionalization with a monolithic crown utilizing a novel chairside computer aided design and computer aided manufacture (CAD/CAM) workflow for single tooth immediate implant placement. Methods: This pilot study was a prospective within-subjects design. Thirteen consecutive patients were included and diagnosed with untreatable single incisor or premolar with fine general and local anatomical conditions. The trial was conducted at Department of Implantology, Peking University School and Hospital of Stomatology, Beijing, between January 2016 and June 2016...
January 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28059451/logic-digital-fluidic-in-miniaturized-functional-devices-perspective-to-the-next-generation-of-microfluidic-lab-on-chips
#4
Qiongdi Zhang, Ming Zhang, Lyas Deghlaf, Jeanne Bataille, Jean Gamby, Anne-Marie Haghiri-Gosnet, Antoine Pallandre
Microfluidics has emerged following the quest for scale reduction inherent to micro and nanotechnologies. By definition, microfluidics manipulates fluids in small channels with dimensions of tens to hundreds of micrometers. Recently, microfluidics has been greatly developed and its influence extends not only the domains of chemical synthesis, bioanalysis and medical researches but also optics and information technology. In this review article, we will shortly discuss an enlightening analogy between electrons transport in electronics and fluids transport in microfluidic channels...
January 6, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28042442/increasing-volume-of-vestibular-soft-tissues-in-flapless-implant-surgery-through-a-modified-connective-punch-technique-a-controlled-clinical-trial
#5
M Andreasi Bassi, C Andrisani, S Lico, F Silvestre, M Gargari, C Arcuri
PURPOSE: The aim of this article is to make a comparative assessment between the modification of the soft-tissue profile, around the healing cap screws (HCSs), following both the traditional flapless surgery (TFS) and a new modified flapless surgery, named Modified Connective Tissue Punch (MCTP) technique. MATERIALS AND METHODS: 8 patients (3M and 5F) (mean age 54.25±11.247 years) were enrolled in this study. Sixteen two-piece implants were placed on upper jaws, 2 for each patient, 8 with TFS and 8 with MCTP technique...
July 2016: Oral & Implantology
https://www.readbyqxmd.com/read/28039903/digital-vs-conventional-full-arch-implant-impressions-a-comparative-study
#6
Sarah Amin, Hans Peter Weber, Matthew Finkelman, Khaled El Rafie, Yukio Kudara, Panos Papaspyridakos
PURPOSE: To test whether or not digital full-arch implant impressions with two different intra-oral scanners (CEREC Omnicam and True Definition) have the same accuracy as conventional ones. The hypothesis was that the splinted open-tray impressions would be more accurate than digital full-arch impressions. MATERIAL AND METHODS: A stone master cast representing an edentulous mandible using five internal connection implant analogs (Straumann Bone Level RC, Basel, Switzerland) was fabricated...
December 31, 2016: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28024822/evaluation-of-the-accuracy-of-7-digital-scanners-an-in%C3%A2-vitro-analysis-based-on-3-dimensional-comparisons
#7
Walter Renne, Mark Ludlow, John Fryml, Zach Schurch, Anthony Mennito, Ray Kessler, Abigail Lauer
STATEMENT OF PROBLEM: As digital impressions become more common and more digital impression systems are released onto the market, it is essential to systematically and objectively evaluate their accuracy. PURPOSE: The purpose of this in vitro study was to evaluate and compare the trueness and precision of 6 intraoral scanners and 1 laboratory scanner in both sextant and complete-arch scenarios. Furthermore, time of scanning was evaluated and correlated with trueness and precision...
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28018914/clinical-acceptability-of-the-internal-gap-of-cad-cam-pd-ag-crowns-using-intraoral-digital-impressions
#8
Tae-Gyung Kim, Sungtae Kim, Hyunmin Choi, Jae-Hoon Lee, Jae-Hong Kim, Hong-Seok Moon
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...
2016: BioMed Research International
https://www.readbyqxmd.com/read/28008430/surgical-and-prosthetic-dental-rehabilitation-through-a-complete-digital-workflow-a-case-report
#9
Panagiotis Tsirogiannis, Sascha Pieger, Stavros Pelekanos, Stefanos Kourtis
Several aspects of digital dentistry have recently been improved, including new materials, navigated implant placement, digital impression in combination with virtual articulation, and the computer-aided processes of designing and manufacturing of prosthetic restorations. In this case report, the prosthodontic treatment of a patient through a complete digital workflow is presented. A 39-year-old male patient presented for restoration of missing teeth in the posterior maxilla and mandible. In a single-tooth narrow gap (region 15), a Straumann NNC implant was placed by computer-assisted planning and navigation...
2016: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/28006016/measuring-emotion-in-parliamentary-debates-with-automated-textual-analysis
#10
Ludovic Rheault, Kaspar Beelen, Christopher Cochrane, Graeme Hirst
An impressive breadth of interdisciplinary research suggests that emotions have an influence on human behavior. Nonetheless, we still know very little about the emotional states of those actors whose daily decisions have a lasting impact on our societies: politicians in parliament. We address this question by making use of methods of natural language processing and a digitized corpus of text data spanning a century of parliamentary debates in the United Kingdom. We use this approach to examine changes in aggregate levels of emotional polarity in the British parliament, and to test a hypothesis about the emotional response of politicians to economic recessions...
2016: PloS One
https://www.readbyqxmd.com/read/27931256/comparison-of-marginal-fit-of-cemented-zirconia-copings-manufactured-after-digital-impression-with-lava%C3%A2-c-o-s-and-conventional-impression-technique
#11
Rinet Dauti, Barbara Cvikl, Alexander Franz, Uwe Yacine Schwarze, Bledar Lilaj, Tina Rybaczek, Andreas Moritz
BACKGROUND: Evaluation of the marginal fit of cemented zirconia copings manufactured after digital impression with Lava™ Chairside Oral Scanner in comparison to that of zirconia copings manufactured after conventional impressions with polyvinyl siloxane. METHODS: A prepared typodont tooth #36, was replicated 40 times with a vinyl silicone and precise model resin. The dies were randomly divided into two groups according to the impression taking technique. Digital impressions with Lava™ C...
December 8, 2016: BMC Oral Health
https://www.readbyqxmd.com/read/27928511/latino-hispanic-alzheimer-s-caregivers-experiencing-dementia-related-dressing-issues-corroboration-of-the-preservation-of-self-model-and-reactions-to-a-smart-dresser-computer-based-dressing-aid
#12
Diane Feeney Mahoney, David W Coon, Cecil Lozano
OBJECTIVE: To gain an understanding of Latino/Hispanic caregivers' dementia-related dressing issues, their impressions of using a "smart" context-aware dresser to coach dressing, and recommendations to improve its acceptability. METHOD: The same Latina moderator conducted all the caregiver focus groups. She followed a semi-structured interview guide that was previously used with White and African American family caregivers who experienced Alzheimer's disease related dressing challenges...
November 2016: Digit Health
https://www.readbyqxmd.com/read/27913424/digital-3d-reconstructions-using-histological-serial-sections-of-lung-tissue-including-the-alveolar-capillary-network
#13
Roman Grothausmann, Lars Knudsen, Matthias Ochs, Christian Mühlfeld
The alveolar capillary network (ACN) provides an enormously large surface area that is necessary for pulmonary gas exchange. Changes of the ACN during normal or pathological development or in pulmonary diseases are of great functional impact and warrant further analysis. Due to the complexity of the three-dimensional (3D) architecture of the ACN, 2D approaches are limited in providing a comprehensive impression of the characteristics of the normal ACN or the nature of its alterations. Stereological methods offer a quantitative way to assess the ACN in 3D in terms of capillary volume, surface area or number but lack a 3D visualization to interpret the data...
December 2, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27881330/improved-digital-impressions-of-edentulous-areas
#14
Ju-Hyoung Lee
No abstract text is available yet for this article.
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27881327/accuracy-of-impression-scanning-compared-with-stone-casts-of-implant-impressions
#15
Ragai Edward Matta, Werner Adler, Manfred Wichmann, Siegfried Martin Heckmann
STATEMENT OF PROBLEM: Accurate virtual implant models are a necessity for the fabrication of precisely fitting superstructures. PURPOSE: The purpose of this in vitro study was to evaluate different methods with which to build an accurate virtual model of a 3-dimensional implant in the oral cavity; this model would then be used for iterative computer-aided design and computer-aided manufacturing (CAD-CAM) procedures. MATERIAL AND METHODS: A titanium master model with 3 rigidly connected implants was manufactured and digitized with a noncontact industrial scanner to obtain a virtual master model...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27881321/a-digital-approach-integrating-facial-scanning-in-a-cad-cam-workflow-for-complete-mouth-implant-supported-rehabilitation-of-patients-with-edentulism-a-pilot-clinical-study
#16
Bassam Hassan, Beatriz Gimenez Gonzalez, Ali Tahmaseb, Marcus Greven, Daniel Wismeijer
STATEMENT OF PROBLEM: Complete-mouth implant-supported rehabilitations are challenging because of the multiple surgical and prosthetic steps involved in clinical evaluations to assure passive prosthesis fit and optimal esthetic and functional outcomes. As a result, these rehabilitations are usually associated with substantial clinical time, patient discomfort, and high treatment cost. PURPOSE: The purpose of this pilot clinical study was to evaluate a novel digital approach integrating digital intraoral dental and extraoral facial scanning information to design and mill a computer-aided design and computer-aided manufacturing (CAD-CAM) implant-retained prosthesis for patients with complete edentulism...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27876722/-comparative-analysis-of-3d-data-visibility-of-the-prepared-tooth-finishing-line-on-a-synthetic-jaw-model-captured-by-international-scanners-in-a-laboratory-conditions
#17
A N Ryakhovsky, V V Kostyukova
The aim of the study was to compare accuracy of digital impression's finishing line and the zone under it taken by different intraoral scanning systems. Parameters of comparison were: different level of the finishing line to the gingiva and width of sulcus after retraction. For this purpose two synthetic jaw models with prepared teeth were scanned using intraoral scanning systems: 3D Progress (MHT S.P.A., IT - MHT Optic Research AG, CH); True Definition (3M ESPE, USA); Trios (3Shape A/S, DNK); CEREC AC Bluecam, CEREC Omnicam (Sirona Dental System GmbH, DE); Planscan (Planmeca, FIN) (each n=10)...
2016: Stomatologii︠a︡
https://www.readbyqxmd.com/read/27875194/visualization-and-extraction-of-carvings-for-heritage-conservation
#18
Kai Lawonn, Erik Trostmann, Bernhard Preim, Klaus Hildebrandt
We present novel techniques for visualizing, illustrating, analyzing, and generating carvings in surfaces. In particular, we consider the carvings in the plaster of the cloister of the Magdeburg cathedral, which dates to the 13th century. Due to aging and weathering, the carvings have flattened. Historians and restorers are highly interested in using digitalization techniques to analyze carvings in historic artifacts and monuments and to get impressions and illustrations of their original shape and appearance...
January 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/27863856/accuracy-of-intraoral-digital-impressions-using-an-artificial%C3%A2-landmark
#19
Jong-Eun Kim, Ami Amelya, Yooseok Shin, June-Sung Shim
STATEMENT OF PROBLEM: Intraoral scanners have been reported to have limited accuracy in edentulous areas. Large amounts of mobile tissue and the lack of obvious anatomic landmarks make it difficult to acquire a precise digital impression of an edentulous area with an intraoral scanner. PURPOSE: The purpose of this in vitro study was to determine the effect of an artificial landmark on a long edentulous space on the accuracy outcomes of intraoral digital impressions...
November 15, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27859471/volumetric-changes-at-pontic-sites-with-or-without-soft-tissue-grafting-a-controlled-clinical-study-with-a-10-year-follow-up
#20
Stefan P Bienz, Irena Sailer, Ignacio Sanz-Martin, Ronald E Jung, Christoph H F Hämmerle, Daniel S Thoma
OBJECTIVE: to evaluate volumetric changes of soft tissues at pontic sites in patients treated with or without soft tissue grafting over an observation period of 10 years. MATERIALS AND METHODS: A total of 17 patients receiving a tooth-borne fixed dental prosthesis (FDP) were enrolled in this study. Nine patients received a subepithelial connective tissue graft at the pontic site (test). Eight patients continued without soft tissue grafting (control). Baseline impressions were taken after delivery of the final FDP and at 10 years...
November 17, 2016: Journal of Clinical Periodontology
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