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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
#1
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/28039903/digital-vs-conventional-full-arch-implant-impressions-a-comparative-study
#2
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
#3
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/28024819/randomized-controlled-within-subject-evaluation-of-digital-and-conventional-workflows-for-the-fabrication-of-lithium-disilicate-single-crowns-part-ii-cad-cam-versus-conventional-laboratory%C3%A2-procedures
#4
Irena Sailer, Goran I Benic, Vincent Fehmer, Christoph H F Hämmerle, Sven Mühlemann
STATEMENT OF PROBLEM: Clinical studies are needed to evaluate the entire digital and conventional workflows in prosthetic dentistry. PURPOSE: The purpose of the second part of this clinical study was to compare the laboratory production time for tooth-supported single crowns made with 4 different digital workflows and 1 conventional workflow and to compare these crowns clinically. MATERIAL AND METHODS: For each of 10 participants, a monolithic crown was fabricated in lithium disilicate-reinforced glass ceramic (IPS e...
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28018567/a-comparison-of-the-fracture-resistances-of-endodontically-treated-mandibular-premolars-restored-with-endocrowns-and-glass-fiber-post-core-retained-conventional-crowns
#5
Jing Guo, Zhiming Wang, Xuesheng Li, Chaoyang Sun, Erdong Gao, Hongbo Li
PURPOSE: This in-vitro study aimed to evaluate the fracture resistances and failure modes of endodontically treated mandibular premolars restored with endocrowns and conventional post-core retained crowns. MATERIALS AND METHODS: Thirty mandibular premolars were assigned into three groups (n=10): GI, intact teeth; GE, teeth with endocrowns; GC, teeth with conventional post-core supported crowns. Except for the teeth in group GI, all specimens were cut to 1.5 mm above the cementoenamel junction and endodontically treated...
December 2016: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28018558/the-effects-of-different-polishing-techniques-on-the-staining-resistance-of-cad-cam-resin-ceramics
#6
Omer Sagsoz, Tevfik Demirci, Gamze Demirci, Nurdan Polat Sagsoz, Mehmet Yildiz
PURPOSE: The purposes of this study were to evaluate the staining resistance of CAD/CAM resin-ceramics polished with different techniques and to determine the effectiveness of the polishing techniques on resin-ceramics, comparing it with that of a glazed glass-ceramic. MATERIALS AND METHODS: Four different CAD/CAM ceramics (feldspathic ceramic: C-CEREC Blocs, (SIRONA) and three resin-ceramics: L-Lava Ultimate, (3M ESPE), E-Enamic, (VITA) and CS-CeraSmart, (GC)) and one light cure composite resin: ME-Clearfil Majesty Esthetic (Kuraray) were used...
December 2016: Journal of Advanced Prosthodontics
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
#7
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/27822572/indirect-zirconia-reinforced-lithium-silicate-ceramic-cad-cam-restorations-preliminary-clinical-results-after-12-months
#8
Moritz Zimmermann, Christina Koller, Albert Mehl, Reinhard Hickel
OBJECTIVE: No clinical data are available for the new computer-aided design/computer-assisted manufacture (CAD/CAM) material zirconia-reinforced lithium silicate (ZLS) ceramic. This study describes preliminary clinical results for indirect ZLS CAD/CAM restorations after 12 months. METHOD AND MATERIALS: Indirect restorations were fabricated, using the CEREC method and intraoral scanning (CEREC Omnicam, CEREC MCXL). Sixty-seven restorations were seated adhesively (baseline)...
November 7, 2016: Quintessence International
https://www.readbyqxmd.com/read/27748157/surveillance-or-support-the-experience-of-direct-observation-during-tuberculosis-treatment
#9
Ietza Bojorquez, Irais Salazar, Richard S Garfein, Paris Cerecer, Timothy C Rodwell
Directly observed therapy (DOT) is a cornerstone of tuberculosis (TB) control. DOT has been criticised as paternalistic, but it has also been argued that the interaction with healthcare workers (HWs) can be a source of support for patients. We explored the experience of patients in antituberculosis treatment, with the aim of understanding the balance between surveillance and support from the recipient's point of view. We interviewed 27 patients in Tijuana, Mexico, employing narrative analysis to understand how participants made sense of their illness and their experience of DOT...
October 16, 2016: Global Public Health
https://www.readbyqxmd.com/read/27723423/effect-of-finishing-and-polishing-on-the-surface-roughness-and-gloss-of-feldspathic-ceramic-for-chairside-cad-cam-systems
#10
M Carrabba, A Vichi, G Vultaggio, S Pallari, R Paravina, M Ferrari
OBJECTIVES: To evaluate surface roughness and gloss of feldspathic ceramic blocks for chairside CAD/CAM systems before and after finishing and polishing. METHODS: VITA Mark II ceramic blocks for the CEREC CAD/CAM system were cut perpendicularly in order to obtain a total of 70 specimens (14 × 18 × 3 mm). The flat surface was roughened using a grinder/polisher with dry 120-grit silicone-carbide paper. Surface roughness and gloss were measured using a digital profilometer (Ra) and a glossmeter (GU), respectively...
October 10, 2016: Operative Dentistry
https://www.readbyqxmd.com/read/27717754/a-new-method-for-assessing-the-accuracy-of-full-arch-impressions-in-patients
#11
F Kuhr, A Schmidt, P Rehmann, B Wöstmann
OBJECTIVE: To evaluate a new method of measuring the real deviation (trueness) of full arch impressions intraorally and to investigate the trueness of digital full arch impressions in comparison to a conventional impression procedure in clinical use. METHODS: Four metal spheres were fixed with composite using a metal application aid to the lower teeth of 50 test subjects as reference structures. One conventional impression (Impregum Penta Soft) with subsequent type-IV gypsum model casting (CI) and three different digital impressions were performed in the lower jaw of each test person with the following intraoral scanners: Sirona CEREC Omnicam (OC), 3M True Definition (TD), Heraeus Cara TRIOS (cT)...
December 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27703611/are-different-generations-of-cad-cam-milling-machines-capable-to-produce-restorations-with-similar-quality
#12
Renato Roperto, Hussein Assaf, Thiago Soares-Porto, Lisa Lang, Sorin Teich
BACKGROUND: Different CAD/CAM machines' generation may impact the restoration overall quality. The present study evaluated the marginal fit of CAD/CAM restorations manufactured with different generations of CEREC milling unit systems. MATERIAL AND METHODS: Sixteen typodont teeth were divided into two groups (n=8) according to the machine's generation assigned. These are control group (G1): Cerec AC with Bluecam/Cerec 3 milling unit and (G2): Cerec AC with Bluecam/MC XL Premium Package milling unit...
October 2016: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/27677220/randomized-controlled-within-subject-evaluation-of-digital-and-conventional-workflows-for-the-fabrication-of-lithium-disilicate-single-crowns-part-iii-marginal-and-internal-fit
#13
Marco Zeltner, Irena Sailer, Sven Mühlemann, Mutlu Özcan, Christoph H F Hämmerle, Goran I Benic
STATEMENT OF PROBLEM: Trials comparing the overall performance of digital with that of conventional workflows in restorative dentistry are needed. PURPOSE: The purpose of the third part of a series of investigations was to test whether the marginal and internal fit of monolithic crowns fabricated with fully digital workflows differed from that of crowns fabricated with the conventional workflow. MATERIAL AND METHODS: In each of 10 participants, 5 monolithic lithium disilicate crowns were fabricated for the same abutment tooth according to a randomly generated sequence...
September 24, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27677214/marginal-and-internal-fit-of-cad-cam-fabricated-composite-resin-and-ceramic-crowns-scanned-by-2-intraoral-cameras
#14
Alessandra C de Paula Silveira, Sacha B Chaves, Leandro A Hilgert, Ana Paula D Ribeiro
STATEMENT OF PROBLEM: The precision of fit of chairside computer-aided design and computer-aided manufacturing (CAD-CAM) complete crowns is affected by digital impression and restorative material. PURPOSE: The purpose of this in vitro study was to evaluate by microcomputed tomography (μCT) the marginal and internal adaptation of composite resin and ceramic complete crowns fabricated with 2 different intraoral cameras and 2 restorative materials. MATERIAL AND METHODS: Ten extracted human third molars received crown preparations...
September 24, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27666500/accuracy-of-single-abutment-digital-cast-obtained-using-intraoral-and-cast-scanners
#15
Jae-Jun Lee, Ii-Do Jeong, Jin-Young Park, Jin-Hun Jeon, Ji-Hwan Kim, Woong-Chul Kim
STATEMENT OF PROBLEM: Scanners are frequently used in the fabrication of dental prostheses. However, the accuracy of these scanners is variable, and little information is available. PURPOSE: The purpose of this in vitro study was to compare the accuracy of cast scanners with that of intraoral scanners by using different image impression techniques. MATERIAL AND METHODS: A poly(methyl methacrylate) master model was fabricated to replicate a maxillary first molar single-abutment tooth model...
February 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27644181/long-term-cerec-3d-chairside-bridges-milled-from-ips-e-max-cad-lt-blocks
#16
Oliver Schneider
The experienced Cerec user can manufacture high-quality, esthetic anterior and posterior bridges from IPS e.max CAD in a manageable 3-hour chairside session. On the basis of over 8 years of experience, it can be said that these restorations are clinically very well proven, provided they are used within the range of recommended indications. Experimental retainer bridges with extensions can be seen as highly interesting alternatives, although more clinical data are required for further confirmation.
2016: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/27636766/comparative-analysis-of-3d-data-accuracy-of-single-tooth-and-full-dental-arch-captured-by-different-intraoral-and-laboratory-digital-impression-systems
#17
COMPARATIVE STUDY
A N Ryakhovsky, V V Kostyukova
The aim of this study was to compare the accuracy of digital impressions taken by different intraoral and laboratory scanners. For this purpose a synthetic jaw model with prepared tooth was 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); and laboratory scanning systems: s600 ARTI (Zirkonzahn GmbH, IT); Imetric Iscan D104, CH); D900 (3Shape A/S, DNK); Zfx Evolution (Zfx GmbH, DE) (each n=10)...
2016: Stomatologii︠a︡
https://www.readbyqxmd.com/read/27507168/influence-of-proximal-box-elevation-technique-on-marginal-integrity-of-adhesively-luted-cerec-inlays
#18
Veronika Müller, Karl-Heinz Friedl, Katrin Friedl, Sebastian Hahnel, Gerhard Handel, Reinhold Lang
OBJECTIVES: This in vitro study evaluated the marginal quality of Lava Ultimate inlays in deep proximal cavities with and without proximal box elevation (PBE) before and after thermomechanical loading (TML). MATERIALS AND METHODS: Mesio-occluso-distal cavities with proximal boxes beneath the cementoenamel junction (CEJ) were prepared in 24 human molars. Then, one of the proximal boxes was elevated with Filtek Supreme above the CEJ. The specimens were divided into three groups (n = 8)...
August 9, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27476358/treatment-comfort-time-perception-and-preference-for-conventional-and-digital-impression-techniques-a-comparative-study-in-young-patients
#19
Lukasz Burhardt, Christos Livas, Wouter Kerdijk, Wicher Joerd van der Meer, Yijin Ren
INTRODUCTION: The aim of this crossover study was to assess perceptions and preferences for impression techniques in young orthodontic patients receiving alginate and 2 different digital impressions. METHODS: Thirty-eight subjects aged 10 to 17 years requiring impressions for orthodontic treatment were randomly allocated to 3 groups that differed in the order that an alginate impressions and 2 different intraoral scanning procedures were administered. After each procedure, the patients were asked to score their perceptions on a 5-point Likert scale for gag reflex, queasiness, difficulty to breathe, uncomfortable feeling, perception of the scanning time, state of anxiety, and use of a powder, and to select the preferred impression system...
August 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27469100/trueness-of-four-different-milling-procedures-used-in-dental-cad-cam-systems
#20
Corinna Kirsch, Andreas Ender, Thomas Attin, Albert Mehl
OBJECTIVES: Milling is a crucial step in producing restorations using computer-aided design and computer-aided manufacturing (CAD/CAM) systems. In this study the trueness of currently available milling devices was evaluated. MATERIALS AND METHODS: Thirty clinical cases (ten inlays, ten crowns, ten onlays) were milled from ceramic blocks using four different milling approaches: five axis with IMES CORiTEC 450i, four axis with CEREC MCXL, four axis with CEREC MCXL-EF and five axis with inLab MCX5...
July 28, 2016: Clinical Oral Investigations
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