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https://www.readbyqxmd.com/read/28527193/comparison-of-digital-intraoral-scanners-by-single-image-capture-system-and-full-color-movie-system
#1
Meguru Yamamoto, Yu Kataoka, Atsufumi Manabe
BACKGROUND: The use of dental computer-aided design/computer-aided manufacturing (CAD/CAM) restoration is rapidly increasing. OBJECTIVE: This study was performed to evaluate the marginal and internal cement thickness and the adhesive gap of internal cavities comprising CAD/CAM materials using two digital impression acquisition methods and micro-computed tomography. METHODS: Images obtained by a single-image acquisition system (Bluecam Ver...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28526444/the-development-of-a-novel-shade-selection-program-for-fixed-shade-translucent-dental-materials
#2
Melody N Carney, William M Johnston
OBJECTIVES: The objective of this study was to develop a shade selection program that predicts the shade choice with the smallest CIEDE2000 color difference for dental composite resin restorations when given a backing and target shade. By utilizing previously generated regression models, a database of spectral reflectance information, and principles of Kubelka-Munk layering, a highly accurate shade selection program was designed. METHODS: Using SAS 9.3 Statistical Analysis Software, a shade selection program was developed that incorporated Kubelka-Munk layering data of Herculite Ultra and Estelite Omega composite resins from a characterized database of absorption and scattering information...
May 16, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28526443/mechanical-properties-of-polymer-infiltrated-ceramic-sodium-aluminum-silicate-composites-for-dental-restoration
#3
Bencang Cui, Jing Li, Huining Wang, Yuanhua Lin, Yang Shen, Ming Li, Xuliang Deng, Cewen Nan
OBJECTIVE: To fabricate indirect restorative composites for CAD/CAM applications and evaluate the mechanical properties. METHODS: Polymer-infiltrated-ceramic composites were prepared through infiltrating polymer into partially sintered sodium aluminum silicate ceramic blocks and curing. The corresponding samples were fabricated according to standard ISO-4049 using for mechanical properties measurement. The flexural strength and fracture toughness were measured using a mechanical property testing machine...
May 16, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28526091/a-pre-therapeutic-coating-for-medical-devices-that-prevents-the-attachment-of-candida-albicans
#4
Diego Vargas-Blanco, Aung Lynn, Jonah Rosch, Rony Noreldin, Anthony Salerni, Christopher Lambert, Reeta P Rao
BACKGROUND: Hospital acquired fungal infections are defined as "never events"-medical errors that should never have happened. Systemic Candida albicans infections results in 30-50% mortality rates. Typically, adhesion to abiotic medical devices and implants initiates such infections. Efficient adhesion initiates formation of aggressive biofilms that are difficult to treat. Therefore, inhibitors of adhesion are important for drug development and likely to have a broad spectrum efficacy against many fungal pathogens...
May 19, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28521914/the-face-of-conflict-significant-sharp-force-trauma-to-the-mid-facial-skeleton-in-an-individual-of-probable-16th-17th-century-date-excavated-from-byczyna-poland
#5
Agata Izabela Cieślik, Paweł Dąbrowski, Magdalena Anita Przysiężna-Pizarska
A variety of injuries have always been associated with violence, consequences of which people had to deal with. In this paper we present a complex of craniofacial and dental injuries resulted from sharp force trauma. The basis of our study was historical skeletal material excavated from archeological site in Byczyna (11th-17th century), Poland. An individual whose skeleton was exhumed from the grave No. 610 exhibited healed, oblique trauma of the left maxilla, damage to the crowns of right central and lateral incisors and concomitant luxation of the right maxillary central incisor...
June 2017: International Journal of Paleopathology
https://www.readbyqxmd.com/read/28521109/cost-effectiveness-of-caries-prevention-in-practice-a-randomized-controlled-trial
#6
C O'Neill, H V Worthington, M Donaldson, S Birch, S Noble, S Killough, L Murphy, M Greer, J Brodison, R Verghis, M Tickle
A 2-arm parallel-group randomized controlled trial measured the cost-effectiveness of caries prevention in caries-free children aged 2 to 3 y attending general practice. The setting was 22 dental practices in Northern Ireland. Participants were centrally randomized into intervention (22,600 ppm fluoride varnish, toothbrush, a 50-mL tube of 1,450 ppm fluoride toothpaste, and standardized prevention advice) and control (advice only), both provided at 6-monthly intervals during a 3-y follow-up. The primary outcome measure was conversion from caries-free to caries-active states assessed by calibrated and blinded examiners; secondary outcome measures included decayed, missing, or filled teeth surfaces (dmfs); pain; and extraction...
May 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28520572/maxillary-sinus-augmentation-for-dental-implant-rehabilitation-of-the-edentulous-ridge-a-comprehensive-overview-of-systematic-reviews
#7
Miriam Ting, Jeremy G Rice, Stanton M Braid, Cameron Y S Lee, Jon B Suzuki
OBJECTIVES: The objective of this systemic review was to perform a comprehensive overview of systematic reviews and meta-analyses of the maxillary sinus augmentation procedure for implant rehabilitation in humans. The following were evaluated in this overview: (1) anatomic variables affecting sinus augmentation, (2) histomorphometric analysis of the grafted sinus, (3) volumetric changes after sinus grafting, and (4) implant survival beyond 1 year. MATERIAL AND METHODS: Electronic databases were searched for systematic reviews and meta-analyses of implant-related sinus augmentation published from 1976 to September 2015...
May 16, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28518212/evaluation-of-cytotoxicity-and-ph-changes-generated-by-various-dental-pulp-capping-materials-an-in-vitro-study
#8
Elzbieta Luczaj-Cepowicz, Grazyna Marczuk-Kolada, Malgorzata Pawinska, Marta Obidzinska, Adam Holownia
INTRODUCTION: Various materials are used in direct dental pulp capping method. Their biocompatibility and alkalizing abilities are of primary importance affecting therapeutic effects. The aim of this study was to evaluate and compare the cytotoxicity of various pulp-capping materials on human gingival fibroblasts and investigate the pH changes induced by these materials. MATERIAL AND METHODS: Human gingival fibroblasts were cultured with nine direct pulp materials using culture plate inserts...
May 18, 2017: Folia Histochemica et Cytobiologica
https://www.readbyqxmd.com/read/28514352/-synthetic-osteoplastic-materials-for-alveolar-bone-augmentation-before-dental-implantation
#9
S V Tarasenko, A M Ershova
The study presents scientific data about surgical preparation of the alveolar bone before dental implantation by applying synthetic osteoplastic materials. The review analyzed the results of experimental and clinical studies on structural features and the efficiency of these materials, the time for replacement of new-formed bone tissue and contains comparative analysis of the efficiency of synthetic bone substitutes and other types of osteoplastic materials.
2017: Stomatologii︠a︡
https://www.readbyqxmd.com/read/28514351/-essential-questions-of-training-of-dentists-for-accreditation
#10
Zh M Sizova, V N Tregubov, T N Malakhova
The paper presents sociological study aimed to analyze the conditions and methodological rationale for the basic directions of optimization of accreditation procedure for dentists. The study included 129 graduates of dental faculties of educational institutions of Sechenov First Moscow State Medical University. The material was collected by questionnaire survey and interviewing. The obtained results show that the introduced system of professionals' accreditation is an innovative educational technology allowing objectively assess the level of theoretical and practical training of dentists...
2017: Stomatologii︠a︡
https://www.readbyqxmd.com/read/28514349/-elastic-properties-and-porosity-of-dental-blocks-made-from-non-metal-materials-used-for-chairside-cad-cam-crowns
#11
K E Goryainova, E S Morokov, M V Retinskaya, I J Lebedenko
Elastic properties and internal structure of glass-ceramic, feldspatic ceramic, PMMA and hybrid blocks for chairside CAD/CAM dental crowns were assessed by pulsed acoustic microscopy. Elastic modulus of hybrid ceramic was 1.5 times inferior to feldspatic ceramic and glass-ceramic but almost 10 times higher than those of polymer samples. We found the presence of pores from a few to hundreds of microns in the bulk of inorganic materials samples, isolated point defects were revealed in polymer materials while in hybrid material defects were not found...
2017: Stomatologii︠a︡
https://www.readbyqxmd.com/read/28513977/use-of-high-performance-polymers-as-dental-implant-abutments-and-frameworks-a-case-series-report
#12
Mohammad Al-Rabab'ah, Wala'a Hamadneh, Ismail Alsalem, Ameen Khraisat, Ashraf Abu Karaky
Dental implant abutments can be made of different materials including titanium, gold, zirconia, alumina, and polymeric materials. Polyetheretherketone (PEEK) is a high performance thermoplastic polymer that can be used as a dental implant abutment material. It has an elastic modulus comparable to bone and can reduce stress shielding. PEEK is a radiolucent material that can allow better radiographic imaging of peri-implant tissues and can be veneered with composite materials or bonded to ceramics. PEEK is widely used in orthopedic and spinal surgeries, and it possesses mechanical and biological characteristics that encourage its use as dental implant abutments...
May 17, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28513897/quality-and-survival-of-direct-light-activated-composite-resin-restorations-in-posterior-teeth-a-5-to-20-year-retrospective-longitudinal-study
#13
REVIEW
Ernesto Borgia, Rosario Baron, Jose Luis Borgia
PURPOSE: To analyze the clinical success of direct light-activated composite resin restorations in posterior teeth. The quality of the margins and occlusal surfaces were evaluated, as well as their survival, according to their extensions and locations. The clinical performance of posterior composite resin restorations with different compositions were compared. All restorations were performed by the first author in his private practice, in a 5- to 20-year period. MATERIALS AND METHODS: Several types of composite resins, provided by different manufacturers, were placed in posterior teeth, after isolation with rubber dams...
May 17, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28513133/antibacterial-property-of-a-polyethylene-glycol-grafted-dental-material
#14
Liying Peng, Li Chang, Xi Liu, Jiuxiang Lin, Hongliang Liu, Bing Han, Shutao Wang
Dental materials often cause bacterial adhesion and promote bacterial biofilm formation, which brings a series of long-standing and significant problems in oral health. However, the current development of antibacterial research in dental devices is limited by the lack of materials endowed with good antibacterial properties against oral bacteria. Here, we present a new strategy for reducing the initial adhesion of bacterial on dental biomaterials by chemically bonding long-chain polyethylene glycol. Our work represents an important step toward solving the problem of bacterial accumulation on dental devices...
May 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28512604/traditional-dentistry-knowledge-among-serbs-in-several-balkan-countries
#15
Dragan V Ilic, Biljana Andjelski Radicevic, Anely Nedelcheva, Ivana Djurovic, Dejan Ostojic
BACKGROUND/AIM: There are still unrevealed treasures of traditional dental medicine, that is, the reason to investigate and present various ways in treatment of oral and orofacial tissues, as well as magic and religious elements involved in representative areas among Serbs. MATERIALS AND METHODS: Information was collected from the elderly non-professional folk dentists and herbalists with the additional help of local physicians and dentists that was done through questionnaire and personal interviews...
April 2017: Journal of Intercultural Ethnopharmacology
https://www.readbyqxmd.com/read/28512545/effect-of-hemostatic-agent-on-marginal-gaps-of-class-v-giomer-restorations
#16
Soodabeh Kimyai, Fatemeh Pournaghi-Azar, Narmin Mohammadi, Mahdieh Babri
BACKGROUND: Contamination of dentin with hemostatic agents might exert a deleterious effect on adhesive procedures on dentin. The present study was undertaken to investigate the effect of aluminum chloride hemostatic agent on marginal gaps in Cl V giomer restorations. MATERIAL AND METHODS: Fifty sound bovine permanent incisors were selected for the purpose of this in vitro study and Cl V cavities were prepared on their buccal surfaces; the gingival margins of the cavities were placed in dentin...
May 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28512493/radiographic-quality-of-root-canal-obturation-performed-by-fifth-year-students-of-hamadan-dental-school
#17
Amir Eskandarloo, Hamed Karkehabadi, Seyedeh Zeinab Hoseini Hashemi, Masoumeh Ahmadi, Seyedeh Sareh Hendi
INTRODUCTION: The aim of this study was to assess the radiographic technical quality of root canal therapy performed by fifth year students of Dental School of Hamadan University of Medical Sciences from 2015 to 2016. METHODS AND MATERIALS: Four hundred and seventy records of root canal therapies were evaluated. Records with graphies taken as initial, master apical file (MAF), master apical cone (MAC) and final radiographs were included in the study and records of patient younger than 16 years and older than 68 years were excluded from further investigations...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28512491/pulp-response-following-direct-pulp-capping-with-dentin-adhesives-and-mineral-trioxide-aggregate-an-animal-study
#18
Ali Akhavan, Farahnaz Arbabzadeh, Majid Bouzari, Sayed Mohammad Razavi, Amin Davoudi
INTRODUCTION: Pulp vitality and its continuous dentin prodution are essential for long-term success of direct pulp capping (DPC). The aim of present study was to evaluate the histopathological response of the canine pulp following DPC using either different dentin adhesive resins (DAR), calcium hydroxide (CH) or mineral trioxide aggregate (MTA). METHODS AND MATERIALS: DPC was done on 72 dog's teeth using 6 types of dental materials (n=12) (4 types of DAR, white MTA and CH)...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28512271/staining-beverages-and-cigarette-smoke-on-composite-resin-and-human-tooth-fluorescence-by-direct-spectrometry
#19
Tânia Mara da Silva, Natália Yamachita da Silva, Lucélia Lemes Gonçalves, Leandro Procópio Alves, Adjaci Uchoa Fernandes, Sérgio Eduardo de Paiva Gonçalves
INTRODUCTION: This study evaluated the fluorescence intensity (FI) of different brands of composite resins (CRs) and compare those values with the FI of human tooth, under the action of cigarette smoke (CI), coffee (CA), and soft drink (CO), measured by direct spectrometry. MATERIALS AND METHODS: A total of 30 specimens of each brand (Filtek Z350, Esthet-X, Amelogen, Durafill) were made. Others 30 tooth specimens (3 mm/diameter) were obtained from human molars using a trephine bur...
May 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28509869/experimental-approach-for-the-uncertainty-assessment-of-3d-complex-geometry-dimensional-measurements-using-computed-tomography-at-the-mm-and-sub-mm-scales
#20
Roberto Jiménez, Marta Torralba, José A Yagüe-Fabra, Sinué Ontiveros, Guido Tosello
The dimensional verification of miniaturized components with 3D complex geometries is particularly challenging. Computed Tomography (CT) can represent a suitable alternative solution to micro metrology tools based on optical and tactile techniques. However, the establishment of CT systems' traceability when measuring 3D complex geometries is still an open issue. In this work, an alternative method for the measurement uncertainty assessment of 3D complex geometries by using CT is presented. The method is based on the micro-CT system Maximum Permissible Error (MPE) estimation, determined experimentally by using several calibrated reference artefacts...
May 16, 2017: Sensors
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