Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “DENTAL MODELS”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 397 records · Page 22Linked to original sources
PubMed1995

Removable partial denture design by Canadian dental laboratories: a retrospective study.

Identical, unilateral, distal extension base (DEB) maxillary and mandibular casts with a posterior modification area were mailed to 15 Canadian commercial dental laboratories. Each cast was accompanied by a letter explaining the purpose of the study and a request for the laboratory to design a RPD-U and RPD-L framework. The package also included a questionnaire on the techniques commonly used by dentists in the construction of a removable partial denture prosthesis, as well as the laboratory procedures they requested from laboratory technicians. Compared to the findings of previous studies by McCracken and others, the results of this study indicate an improvement in the dentists' understanding of the fundamental principles of an RPD framework design. However, the questionnaire also revealed the need for improved communication between the dentist and the technician. The study suggests that the basic principles for the construction and design of removable partial dentures, as taught in dental schools across Canada, must be respected by dentists.

Communication↗
PubMed1997

IPS Empress veneers. Color communication, laboratory fabrication, and cementation.

Once considered to be revolutionary, porcelain veneers are now the foundation of most aesthetic dental practices. Requiring only conservative preparations, porcelain veneers can dramatically change a smile. This article discusses the technique necessary to prepare and place porcelain veneers, using a new pressed-ceramic system. Close and thorough cooperation and communication between the clinician and the laboratory are essential throughout the procedure, and this article is coauthored by a dentist and a ceramist.

Adult↗
PubMed1998

The science of communicating the art of dentistry.

Laboratory work authorization forms are mainly developed in the form of written instructions, two-dimensional drawings or photographs. These can be supplemented with other forms of communications, which will give three-dimensional information and take into account the lips, which are considered the frame of the teeth. This article will describe a systematic approach to communication with a patient and laboratory technician using three-dimensional aids such as a smile replica, lip reproductions, provisional restoration casts and soft tissue casts.

Communication↗
PubMed2003

Microbiological evaluation of a range of disinfectant products to control mixed-species biofilm contamination in a laboratory model of a dental unit water system.

Dental unit water system (DUWS) tubing harbors complex multispecies biofilms that are responsible for high microbial levels at the distal outlet. The aim of this study was to use an established biofilm laboratory model to simulate biofouling of DUWS to evaluate practical, cost-effective, and evidence-based methods of microbial decontamination. Reproducible biofilms were developed in the model over 14 days; decontamination was assessed using total viable counts (TVC) and microscopic-image analysis techniques to view the inner surface of tubing. Flushing did not reduce the biofilm coverage or TVC. Combizyme and ozone did not completely eliminate the viable bacteria (70 and 65% reduction in biofilm TVC, respectively), nor did they remove the biofilm (45 and 57% reduction in biofilm coverage, respectively). Chlorhexidine and Bio2000 (active agent: ethanol and chlorhexidine), Tegodor and Gigasept Rapid (aldehyde based), and Grotanol (hydroxide based) completely eliminated the TVC but did not completely remove biofilm (31, 53 33, 34, and 64.9% reduction of biofilm coverage, respectively). Other products including Grotanol Flussig (phenol based), Betadine (povidone-iodine based), Alpron (chlorite based), and the hydroxide-containing products Sporklenz, Sterilex Ultra, Dialox, Sterilox, Sanosil, Oxigenal, and Grotanat Bohrerbad resulted in a 100% reduction in the biofilm TVC and a >95% reduction in biofilm coverage. The study demonstrated that while many disinfectants achieve a sufficient reduction in TVC they may not necessarily remove unwanted biofilm from the tubing surfaces as tested in this laboratory-controlled biofilm model.

Bacteria↗
PubMedDate not supplied

The importance of laboratory communication in modern dental practice: stone models without faces.

The development of advanced communication technology has enabled clinicians and ceramists to deliver improved dental care to their patients. This article highlights the importance of communication between the clinician, laboratory technician, and patient for the fabrication and delivery of aesthetic restorations. The use of stone models, photography, shade prescriptions, and occlusal relationships is demonstrated as a means to achieve this objective. These principles are illustrated in the restoration of a patient who presented for aesthetic enhancement of the anterior maxilla.

Color↗
PubMed2001

[The Augsburg cooperation model for promoting dental health in childhood].

Dental care in children and adolescents has been remarkably successful in the recent past. For the purpose of reducing dental caries risk still further, a cooperation model has been developed which combines the elements of diagnosis, group prophylaxis, individual intensive prophylaxis and if necessary dental treatment. This involves cooperation between the Bavarian Provincial Working Group for Dental Health, statutory sickness insurance, practising dental surgeons and Public Health Services.

Adolescent↗
PubMed2005

Low-shrinkage dental restorative composite: modeling viscoelastic behavior during setting.

Much attention has been directed toward developing dental direct restorative composites that generate less shrinkage stress during setting. The aim of this study was to explore the viscoelastic behavior of a new class of low-shrinkage dental restorative composite during setting. The setting behavior of an experimental oxirane composite has been investigated by analyzing stress-strain data with two-parametric mechanical models. Experimental data were obtained from a dynamic test method, in which the setting light-activated composite was continuously subjected to sinusoidal strain cycles. The material parameters and the model's predictive capacity were analyzed with validated modeling procedures. The light-activated oxirane composite exhibited shrinkage delay and low polymerization shrinkage strain and stresses when compared with conventional light-activated composite. Noise in the stress data restricted the predictive ability of the Maxwell model to the elastic modulus development of the composite only. Evaluation tests of their potential as restorative material are required, to examine if the biocompatibility and mechanical properties after setting of oxirane composites are acceptable for dental use.

Biocompatible Materials↗
PubMed2006

Organic overlayer model of a dental composite analyzed by laser desorption postionization mass spectrometry and photoemission.

Some dental composites consist of a polymerizable resin matrix bound to glass filler particles by silane coupling agents. The resin in these composites includes bisphenol A diglycidyl methacrylate (Bis-GMA) as well as other organic components. Silane coupling agents such as 3-(trimethoxysilyl) propyl methacrylate (MPS) have been used to improve the mechanical properties of the dental composites by forming a covalent bond between the glass filler particles and the resin. These resin-glass composites undergo material property changes during exposure to the oral environment, but degradation studies of the commercial composites are severely limited by their chemical complexity. A simplified model of the dental composite has been developed, which captures the essential chemical characteristics of the filler particle-silane-resin interface. This model system consists of the resin matrix compound Bis-GMA covalently bound via a methacryloyl overlayer to amorphous silicon oxide (SiO2) surface via a siloxane bond. Scanning electron microscopy shows the porous characteristic and elemental composition of the SiO2 film, which approximately mimics that of the glass filler particles used in dental composites. LDPI MS and XPS verify the chemistry and morphology of the Bis-GMA-methacryloyl overlayer. Preliminary results demonstrate that LDPI MS will be able to follow the chemical processes resulting from aging Bis-GMA-methacryloyl overlayers aged in water, artificial saliva, or other aging solutions.

Biocompatible Materials↗
PubMed1980

Reducing child uncooperative behavior during dental treatment through modeling and reinforcement.

The uncooperative behavior of grade-school children during dental treatment was examined. Forty children enrolled in a government dental program were observed during treatment conditions involving instructions concerning the appropriate behavior required by the dental practitioner, description of the objective procedures and subjective experience the child could expect, praise for appropriate behavior, and a colorful stamp for coming to the clinic. Eight of these children whose behavior was still too disruptive for effective dentistry were formally introduced to additional intervention procedures of tangible consequences for cooperative behavior, and observation of peers and by peers during actual dental treatment. Within a multiple baseline design, the intervention conditions were effective in decreasing the children's uncooperative behavior to acceptable levels.

Child↗
PubMed2002

[The design for 3-D geometry and finite element models of the dental tissue and the prostheses].

OBJECTIVE: To establish the system of the models and the element libraries for prosthodontics. METHODS: Taking jaws and dentition as sample, with the help of the CT scanning and software, such as PRO/E, ANSYS,etc established the 3-D geometry and finite element models. At first, and then, established several kinds of library of the dentition and dentures. At last we discussed the application way of these models and element libraries. RESULTS: Established the 3-D models and element libraries of jaws, dentition and prostheses. CONCLUSION: The 3-D models have favorite similarities in geometry and mechanics. The study verified these element libraries are effective and can be used conveniently.

English Abstract↗
PubMed1984

Cross validation of model predicting (ir)regularity of dental attendance.

A theoretical model developed for the prediction of (ir)regular dental attendance was evaluated with loglinear models (logit approach). The model found is identical to the model developed previously. The prediction of (ir)regularity, however, proved to be unsatisfactory. The disappointing result is attributed to the difficulty of measuring the predictors adequately, and to the possibility that additional variables might be needed.

Dental Care↗