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 667 records · Page 37Linked to original sources
PubMed1989

Measurement of temperature generated by visible-light-cure lamps in an in vitro model.

The dental pulp is vulnerable to cavity preparation and restoration procedures. This vulnerability may be a result of the temperature rise generated by those procedures. When visible-light-cure lamps are used to place composite restorations, they cause the temperature in the pulp to rise. This study measured the temperature rise recorded when six visible-light-cure lamps were tested for 20- and 60-second exposure times. They were also tested in conjunction with an air current passed along the face of the lens in order to lower the temperature. Analysis of the data indicates that the lamps do cause a temperature rise within the pulp chamber--a higher rise the longer the lamp is used. Dentin thickness is important, and air lowers the temperature generated.

Dental Pulp↗
PubMed2004

A model for increasing senior dental student production using private practice principles.

Previous dental graduates have reported a lack of confidence in their ability to implement business practices upon graduation. The purpose of the new model was to enable senior students to gain experience using sound business principles in their senior year. This model involves setting and meeting production goals, teamwork, personnel evaluation, and performance incentives. This article reports the findings after implementing this model in the academic year 2003-04. Each student averaged 226 more charged visits than in 2002-03. Total dollars produced increased $7,526 per student, which represented a 63 percent increase in production over the previous year. Total dollars produced by the senior class increased from $713,740 to $1,066,139 over the previous year. A survey of the students' attitudes toward the model showed an increase in acceptance from the beginning of the senior year to the end of the year. The model was successful in achieving most of the desired outcomes but failed to increase seniors' chairtime utilization.

Attitude of Health Personnel↗
PubMed2005

A novel method of removing artifacts because of metallic dental restorations in 3-D CT images of jaw bone.

CT images, especially in a three-dimensional (3-D) mode, give valuable information for oral implant surgery. However, image quality is often severely compromised by artifacts originating from metallic dental restorations, and an effective solution for artifacts is being sought. This study attempts to substitute the damaged areas of the jaw bone images with dental cast model images obtained by CT. The position of the dental cast images was registered to that of the jaw bone images using a devised interface that is composed of an occlusal bite made of self-curing acrylic resin and a marker plate made of gypsum. The patient adapted this interface, and CT images of the stomatognathic system were filmed. On the other hand, this interface was placed between the upper and lower cast models and filmed by CT together with the cast models. The position of the marker plate imaged with the dental casts was registered to those adapted by the patient. The error of registration was examined to be 0.25 mm, which was satisfactory for clinical application. The damaged region in the cranial bone images as an obstacle for implant surgery was removed and substituted with the trimmed images of the dental cast. In the method developed here, the images around the metallic compounds severely damaged by artifacts were successfully reconstructed, and the stomatognathic system images became clear, and this is useful for implant surgery.

Artifacts↗
PubMed1977

A potential model for the interaction of enamel fluoride and plaque in the development of dental caries.

A model relating caries to surface enamel fluoride and plaque has been derived by exploratory data analyses. Since the model was obtained a posteriori, it is best viewed in qualitative terms as a hypothesis for future testing. The model prompts a re-evaluation of expectations relative to the effects of surface enamel apatitic fluoride, and a consideration that the effectiveness of a given measure of fluoride may vary as a function of inherent challenge. Thus, further studies are needed, aimed at quantifying the parameters of resistance and challenge, and characterizing the relationship between them.

Adolescent↗
PubMed2006

[Clinical study of Twin-wires on anchorage on canine retraction].

PURPOSE: The purpose of the study was to evaluate the effects of anchorage by Twin-wires on canine retraction. METHODS: A sample of 15 patients with severe anterior crowding was selected (6 males, 9 females, age average: 13.7 years). All patients underwent removal of the four first premolars during orthodontic treatment. Retraction of canine was achieved by using 0.018 stainless steel wire and NiTi wire. Anchorage reinforcement as a result of this movement was evaluated. The length and width of the dental arch models were measured. Self-control t test was used for data analysis. RESULTS: The length and width of the dental arches, the canine and molar relationships remained unchanged after orthodontic treatment. CONCLUSION: Application of Twin-wires leads to canine retraction and sufficient anchorage consolidation.

Adolescent↗