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https://www.readbyqxmd.com/read/29627217/replicating-a-discolored-tooth-preparation-a-technique-for-effective-laboratory-communication
#1
Jay D Matani, Mohit G Kheur, Tabrez A Lakha, Vinay Jain
Fabricating a ceramic restoration for a discolored anterior tooth presents a clinical challenge. The dental technician is often hampered by being unaware of the shade of the discolored tooth preparation, which influences the color of the overlying ceramic restoration. A definitive cast that replicates the shade of the prepared tooth helps the ceramist to fabricate a restoration that masks the discoloration appropriately and still achieves the desired optical properties. This report demonstrates the use of a technique of recording and communicating the shade of a prepared tooth to the dental laboratory technician...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29563437/polishing-of-monolithic-zirconia-crowns-results-of-different-dental-practitioner-groups
#2
Carla Kozmacs, Britta Hollmann, Wolfgang H Arnold, Ella Naumova, Andree Piwowarczyk
This pilot study evaluates the surface roughness of monolithic zirconia crowns after chairside polishing by different dental practitioner groups. Four practitioner groups (group I: dental clinical students ( n = 6); group II: dentists < 2 years post-qualification experience ( n = 6); group III: dentists > 2 years post-qualification experience ( n = 6) and group IV: dental technicians ( n = 6)) were asked to polish two CAD/CAM-fabricated full-contour zirconia crowns (48 in total). A two-step zirconia polishing kit was used in both trials...
November 14, 2017: Dentistry journal
https://www.readbyqxmd.com/read/29518070/dental-personnel-treated-for-idiopathic-pulmonary-fibrosis-at-a-tertiary-care-center-virginia-2000-2015
#3
Randall J Nett, Kristin J Cummings, Brenna Cannon, Jean Cox-Ganser, Steven D Nathan
In April 2016, a Virginia dentist who had recently received a diagnosis of idiopathic pulmonary fibrosis (IPF) and was undergoing treatment at a specialty clinic at a Virginia tertiary care center contacted CDC to report concerns that IPF had been diagnosed in multiple Virginia dentists who had sought treatment at the same specialty clinic. IPF is a chronic, progressive lung disease of unknown cause and associated with a poor prognosis (1). Although IPF has been associated with certain occupations (2), no published data exist regarding IPF in dentists...
March 9, 2018: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29511653/feasibility-online-survey-to-estimate-physical-activity-level-among-the-students-studying-professional-courses-a-cross-sectional-online-survey
#4
Bhumika Sudha, Asir John Samuel, Kanimozhi Narkeesh
The aim of the study was to estimate the physical activity (PA) level among the professional college students in North India. One hundred three professional college students in the age group of 18-25 years were recruited by simple random sampling for this cross-sectional online survey. The survey was advertised on the social networking sites (Facebook, WhatsApp) through a link www.surveymonkey.com/r/MG-588BY. A Short Form of International Physical Activity Questionnaire was used for this survey study. The questionnaire included total 8 questions on the basis of previous 7 days...
February 2018: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29465087/-control-of-cross-contamination-in-dental-prostheses-laboratories
#5
I Vázquez Rodríguez, R Gómez Suárez, A Estany-Gestal, M J Mora Bermúdez, P Varela-Centelles, U Santana Mora
BACKGROUND: Dental laboratories are a potential source of cross-contamination. This study aims to assess its control in Galicia. METHODS: Voluntary random telephone interviews resulted in 149 completed questionnaires. The variables are described by percentages or means and standard deviations. A bivariate analysis was undertaken using the Chi square test. RESULTS: Participants were mostly middle-age (mean=45.7, SD=9.8) males (68.5%) with 20...
February 21, 2018: Anales del Sistema Sanitario de Navarra
https://www.readbyqxmd.com/read/29327359/contact-sensitization-in-dental-technicians-with-occupational-contact-dermatitis-data-of-the-information-network-of-departments-of-dermatology-ivdk-2001-2015
#6
Annice Heratizadeh, Thomas Werfel, Steffen Schubert, Johannes Geier
BACKGROUND: Dental technicians (DTs) are at increased risk for allergic contact sensitization. OBJECTIVES: To assess the current spectrum of occupational sensitization in DTs with occupational contact dermatitis (OCD). METHODS: A retrospective analysis of Information Network of Departments of Dermatology patch test data from the years 2001-2015 concerning DTs with OCD was performed. RESULTS: Patients of the study group (226 DTs with OCD) were significantly more often diagnosed with allergic contact dermatitis (37...
April 2018: Contact Dermatitis
https://www.readbyqxmd.com/read/29326443/aesthetic-possibilities-in-removable-prosthodontics-part-1-the-aesthetic-spectrum-from-perfect-to-personal
#7
J N Besford, A F Sutton
Patients requiring dentures are getting older and as a result can be difficult to treat owing to various co-morbidities. This series of papers presents an overview of the processes involved in making removable dentures which the patient considers to be functionally and aesthetically successful. We hope not only to provide technical suggestions but also to address the issue of the clinician's, technician's and dental nurse's relationships with the dentally depleted patient. It is increasingly clear from defence organisation reports that this has a decisive effect on the success of this fundamentally difficult enterprise ('The only branch of dentistry in which you are trying to attach something to nothing' [Hubert Aïche])...
January 12, 2018: British Dental Journal
https://www.readbyqxmd.com/read/29314277/erasmus-syndrome-associated-with-an-immune-thrombocytopenic-purpura
#8
LETTER
M Fouchard, B Pan Petesch, C Abasq-Thomas, A Saraux, L Misery, E Brenaut
No abstract text is available yet for this article.
January 5, 2018: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29258642/career-focus-film-falsies
#9
Amy Brewerton
Dental technician Gary Archer makes removable prosthodontic devices for hollywood movies. he shares some of the tricks of the trade with PDJ managing editor Amy Brewerton.
December 1, 2017: Primary Dental Journal
https://www.readbyqxmd.com/read/29249878/infection-control-knowledge-and-practice-a-cross-sectional-survey-on-dental-laboratories-in-dental-institutes-of-north-india
#10
Sakshi Gupta, Sapna Rani, Sandeep Garg
Aim and Objectives: The aim of the study was to assess the knowledge of dental laboratory technicians regarding infection control and modes of infection control employed by them. Settings and Design: A self-assessment questionnaire-based survey was carried out among dental technicians to assess the knowledge and practice of infection control in dental laboratories. Materials and Methods: Survey instrument containing 16 questions were randomly distributed to 70 dental colleges of North India regarding knowledge of infection control methods and infection control practised in laboratories...
October 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/29240213/minimally-invasive-treatment-of-an-ankylosed-severely-discolored-and-intruded-central-incisor-with-a-masking-ceramic-veneer-a-clinical-report
#11
Anja Liebermann, Daniel Edelhoff, Otto Prandtner, Reza Saeidi Pour
Dental therapy of traumatically ankylosed maxillary anterior teeth with an additional slight root resorption represents a great challenge for the restorative team and requires intensive planning and communication between patient, dentist, orthodontist, periodontist, and dental technician. The inhibition of vertical growth often makes dental intervention indispensable. Porcelain laminate veneers have been successfully used for more than two decades, mainly on anterior teeth, and was the minimally invasive treatment option for the present case report...
January 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29233132/intraoral-scanners-in-dentistry-a-review-of-the-current-literature
#12
Francesco Mangano, Andrea Gandolfi, Giuseppe Luongo, Silvia Logozzo
BACKGROUND: Intraoral scanners (IOS) are devices for capturing direct optical impressions in dentistry. The purpose of this narrative review on the use of IOS was to: (1) identify the advantages/disadvantages of using optical impressions compared to conventional impressions; (2) investigate if optical impressions are as accurate as conventional impressions; (3) evaluate the differences between the IOS currently available commercially; (4) determine the current clinical applications/limitations in the use of IOS...
December 12, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/29178932/herbst-appliance-with-skeletal-anchorage-versus-dental-anchorage-in-adolescents-with-class-ii-malocclusion-study-protocol-for-a-randomised-controlled-trial
#13
Klaus Barretto Dos Santos Lopes Batista, Tatiana Lima, Nathália Palomares, Felipe de Assis Carvalho, Cátia Quintão, José Augusto Mendes Miguel, Yin-Ling Lin, Ting-Li Su, Kevin O'Brien
BACKGROUND: The Herbst appliance is an orthodontic appliance that is used for the correction of class II malocclusion with skeletal discrepancies. Research has shown that this is effective. However, a potential harm is excessive protrusion of the lower front teeth. This is associated with gingival recession, loss of tooth support, and root resorption. This trial evaluates a method of reducing this problem. METHODS/DESIGN: The study is a single-center, randomised, assessor-blinded, superiority clinical trial with parallel 1:1 allocation...
November 25, 2017: Trials
https://www.readbyqxmd.com/read/29107684/ethylene-glycol-dimethacrylate-and-diethylene-glycol-dimethacrylate-exhibits-cytotoxic-and-genotoxic-effect-on-human-gingival-fibroblasts-via-induction-of-reactive-oxygen-species
#14
Anna Bielecka-Kowalska, Piotr Czarny, Paulina Wigner, Ewelina Synowiec, Bartosz Kowalski, Marzena Szwed, Renata Krupa, Monika Toma, Malgorzata Drzewiecka, Ireneusz Majsterek, Janusz Szemraj, Tomasz Sliwinski, Michał Kowalski
Although methacrylic acid derivatives in their polymeric form are considered to be safe, insufficient polymerization and the release of monomers due to either mechanical or enzymatical factors can lead to their reaching millimolar concentrations in local tissue. The present study evaluates the effect of two methacrylate monomers - ethylene glycol dimethacrylate (EGDMA) and diethylene glycol dimethacrylate (DEGDMA) - on human gingival fibroblasts (HGFs). Both monomers were found to reduce cells viability in MTT assay, increase apoptosis and cause cell cycle arrest in G1/G0 phase...
March 2018: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/29084294/computer-aided-design-computer-assisted-manufacture-monolithic-restorations-for-severely-worn-dentition-a-case-history-report
#15
Samir Abou-Ayash, Johannes Boldt, Alexander Vuck
Full-arch rehabilitation of patients with severe tooth wear due to parafunctional behavior is a challenge for dentists and dental technicians, especially when a highly esthetic outcome is desired. A variety of different treatment options and prosthetic materials are available for such a clinical undertaking. The ongoing progress of computer-aided design/computer-assisted manufacture technologies in combination with all-ceramic materials provides a predictable workflow for these complex cases. This case history report describes a comprehensive, step-by-step treatment protocol leading to an optimally predictable treatment outcome for an esthetically compromised patient...
November 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29021460/dental-technicians-pneumoconiosis
#16
Masaki Okamoto, Masaki Tominaga, Shigeki Shimizu, Chiyo Yano, Ken Masuda, Masayuki Nakamura, Yoshiaki Zaizen, Takashi Nouno, Satoshi Sakamoto, Mitsuru Yokoyama, Tomotaka Kawayama, Tomoaki Hoshino
A 40-year-old female dental technician visited our hospital for the investigation of a chest X-ray abnormality. Chest computed tomography demonstrated centrilobular nodules and lung volume reduction, and her serum KL-6 level was elevated. A histological analysis of the specimens obtained on a surgical lung biopsy showed peribronchiolar fibrosis with pigmented macrophages and cholesterol clefts. An energy-dispersive X-ray analysis showed that these lung tissues contained some metals, including indium. The serum indium level was also elevated...
December 15, 2017: Internal Medicine
https://www.readbyqxmd.com/read/28951037/nanoparticles-in-dentistry
#17
REVIEW
Gottfried Schmalz, Reinhard Hickel, Kirsten L van Landuyt, Franz-Xaver Reichl
OBJECTIVE: Nanoparticles having a size from 1 to 100nm are present in nature and are successfully used in many products of daily life. Nanoparticles are also embedded per se or as byproducts from milling processes of larger filler particles in many dental materials. METHODS AND RESULTS: Recently, possible adverse effects of nanoparticles have gained increased interest with the lungs being a main target organ. Exposure to nanoparticles in dentistry may occur in the dental laboratory, by processing gypsum type products or by grinding and polishing materials...
November 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28925546/multidisciplinary-full-mouth-rehabilitation-with-soft-tissue-regeneration-in-the-esthetic-zone
#18
Anja Liebermann, Stefan Frei, Madalena Lucia Pinheiro Dias Engler, Otto Zuhr, Otto Prandtner, Daniel Edelhoff, Reza Saeidi Pour
OBJECTIVE: Oral rehabilitation often requires a multidisciplinary approach including restorative dentistry, prosthodontics, and periodontology to fulfill high esthetic and functional demands, frequently combined with changes in the vertical dimension. The presence of gingival recessions can be associated with numerous factors, such as brushing or preparation trauma and persistent inflammation of the gingiva due to inadequate marginal fit of restorations. Because gingival recessions can cause major esthetic and functional problems, obtaining stability of the gingival tissue around prosthetic restorations is of essential concern...
January 2018: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28916163/effects-of-small-grit-grinding-and-glazing-on-mechanical-behaviors-and-ageing-resistance-of-a-super-translucent-dental-zirconia
#19
Xuan Lai, Wenjie Si, Danyu Jiang, Ting Sun, Longquan Shao, Bin Deng
OBJECTIVES: The purpose of this study is to elucidate the effects of small-grit grinding on the mechanical behaviors and ageing resistance of a super-translucent dental zirconia and to investigate the necessity of glazing for the small-grit ground zirconia. METHODS: Small-grit grinding was performed using two kinds of silicon carbide abrasive papers. The control group received no grinding. The unground surfaces and the ground surfaces were glazed by an experienced dental technician...
November 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28902238/dental-ceramics-a-review-of-new-materials-and-processing-methods
#20
REVIEW
Lucas Hian da Silva, Erick de Lima, Ranulfo Benedito de Paula Miranda, Stéphanie Soares Favero, Ulrich Lohbauer, Paulo Francisco Cesar
The evolution of computerized systems for the production of dental restorations associated to the development of novel microstructures for ceramic materials has caused an important change in the clinical workflow for dentists and technicians, as well as in the treatment options offered to patients. New microstructures have also been developed by the industry in order to offer ceramic and composite materials with optimized properties, i.e., good mechanical properties, appropriate wear behavior and acceptable aesthetic characteristics...
August 28, 2017: Brazilian Oral Research
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