Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Prosthesis Coloring”

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 451 records · Page 25Linked to original sources
PubMed1994

Indirect posterior composite inlays and onlays.

Indirect posterior composite inlays and onlays are a valuable part of the cosmetic dentist's repertoire of services. They fulfill most of the requirements for an esthetic alternative to the previously considered amalgam, gold, porcelain, and directly placed composite restorations. As in all other cosmetic dental procedures, attention to detail is essential for success. Improving technology will continue to have an impact on the place these restorations occupy in future cosmetic practice.

Composite Resins↗
PubMed1997

Colour stability of visible light-curing hybrid composites.

The colour stability of six visible light-curing fine hybrid composites was evaluated after 24 and 120 hours of irradiation using a xenon lamp. Discoloration of four shades of each material (A1, A2, A3.5 and B2- Vita shade guide) was measured using a reflection spectrophotometer with the CIE-L*a*b* system. The discoloration after 24 hours of irradiation had values of between 0.7 and 3.8 DE*, and was therefore, with the exception of Z 100 (colours A1 and B2), clinically acceptable. The results showed that the differences in colour of all shades of Pekafill NF and Tetric tested were significantly less than those of the other products. All samples, with the exception of Pekafill NF (A3.5 and B2), showed increased discoloration to values of 3.7 to 7.8 DE* after 120 hours of exposure to UV light. In general, all the composites tended to become more yellow (b*), darker (L*) and slightly greener (a*).

Analysis of Variance↗
PubMedDate not supplied

Esthetic improvements and in vitro testing of In-Ceram Alumina and Spinell ceramic.

The original In-Ceram material (In-Ceram Alumina), composed of sintered aluminum oxide subsequently infused with a glass, features interesting mechanical properties. In-Ceram Spinell was marketed more recently to improve the esthetic potential. This study compared the flexural strength of various combinations of sintered alumina and spinel infiltrated with the associated glasses. In addition, the influence of vacuum during the infusion process was investigated using density measurements. The characteristic strength (load at which 63% of the specimens had failed) was 530 MPa for the original material, 523.7 MPa when the same material was infiltrated under vacuum, 481.4 MPa when sintered alumina was infused under vacuum with the glass originally marketed for the spinel, and 283.1 MPa for the sintered spinel infiltrated under vacuum with the associated glass. A significant increase in density was observed when the infiltration firing of sintered alumina was performed under vacuum. Furthermore, the in vivo evaluation of specific esthetic parameters inherent to different types of cores was made and revealed the relative opacity of alumina; spinel was found to have the ability to blend in with the underlying substrate. Both materials demonstrated a general lack of fluorescence.

Aluminum Oxide↗
PubMed1992

Clinical evaluation of four dental amalgams over a two year period.

The aim of this study was to determine the clinical durability of two locally manufactured amalgams. In each of eighty-two patients one class II cavity was restored with Dispersalloy (Johnson and Johnson) which served as the control and all the other class II cavities were randomly restored with one of the following amalgams: Amalgaphase, Amalga 43 (Amalgam Alloys-South Africa) or Permite C (Southern Dental Industries). Matrix bands were placed. Kalzinol bases and Polyvar varnish were applied in all cavities. All amalgams were mixed according to the manufacturers' instructions. The cavities were overpacked with amalgam, and the amalgam condensed by hand, carved and then burnished with a ball burnisher. Twenty-four hours later all restorations were polished with a Shofu polishing system and colour photographs were taken. The restorations were evaluated using the Ryge and Snyder (1973) evaluation system, as well as comparison of the colour photos. The Fisher's Exact Test was used for the statistical analysis. During the second year there were no significant (p < 0.05) differences between the four brands of amalgam restorations except as regards the gloss category. The two South African manufactured amalgams compared well with the two imported amalgams. During the second year the marginal integrity and surface texture of Amalgaphase compared well with that of Permite C. Dispersalloy and Permite C showed more deterioration in anatomic form than the two South African amalgams. Amalgaphase was the only amalgam to show no bulk fracture within a period of two years. Amalgaphase performed better in the gloss category than the other three amalgams during the second year evaluation. According to the weighted product calculation Amalgaphase was the best amalgam followed by Dispersalloy, Amalga 43 and Permite C.

Dental Alloys↗
PubMed1996

An updated guide to characterizing injected dentures.

This article describes gingival characterization using an injection processing and curing technique. The wax-up procedure described in this article duplicates natural features such as gingival contours, freni, interdental papillae and stippling before investment of the case. The processing and finishing procedure, from deflasking to pumicing/polishing to delivery, are described.

Acrylic Resins↗
PubMed1996

A survey to design the ideal complete denture laboratory prescription.

Dentists often do not supply the dental laboratory sufficient information to select and arrange maxillary denture prosthetic teeth. This article reports results from a 1995 survey that asked dental technicians certified in complete dentures what elements they would like to see on an ideal dental laboratory prescription. With regard to tooth selection, dental technicians rated most important on a prescription shade, lip length and shape of face; with regard to tooth arrangement, dental technicians rated very important the patient's sex and age.

Adult↗
PubMed1997

Laboratory procedures for fabricating pressable all-ceramic restorations.

All-ceramic restorations have been recognized and accepted as being esthetically superior to porcelain-fused-to-metal or all-cast restorations. However, gains in esthetics achieved with an all-ceramic crown often meant sacrifices in strength, fit or both. Recent developments in the pressed ceramic format continue to secure the pressed all-ceramic restoration as a viable alternative to porcelain-to-metal and all-cast restorations. This article focuses on the most updated techniques and considerations of this type of system and its effectiveness in providing esthetics, strength and fit through "technician-friendly" procedures, materials and equipment.

Ceramics↗
PubMed1996

Complete dentures: are they out of phase with current therapy?

Complete dentures are truly a full-mouth reconstruction that functions in a dynamic environment and provides the completely edentulous patient with function, esthetics, phonetics, facial support, and self-esteem. Solutions to six of the most frustrating problems of complete denture treatment are described. These solutions provide enhanced treatment possibilities and mutual satisfaction to both the patient and the practitioner.

Dental Articulators↗
PubMed1994

The hybrid crown.

A crown type has been described that offers the advantages of both ceramic veneers and metal crowns. More than 200 single crowns and three three-unit bridges of this type have been inserted with no failures after two years. University-based shear and compressive testing is currently being arranged to affirm perceived clinical strength of this new crown type. Comparison testing also will be performed with comparative values for the hybrid crown, all ceramic (various types), and porcelain-fused-to-metal.

Adult↗
PubMed1995

Smile architecture: beyond smile design.

Successful cosmetic dental treatment is both functional and aesthetic. It requires evaluation of a patient's expectations, diagnosis of pre-existing problems and careful planning of treatment to eliminate or control the causes of existing conditions. The use of mounted diagnostic casts and a diagnostic wax-up allows visualization of the expected result. Provisional restorations offer a "dress rehearsal" to preview functional and aesthetic results before completion of the final restorations. The term "smile architecture" is used to describe the process that guides a patient and dentist from initial complaint through to final case acceptance.

Adult↗
PubMed1997

Ceromer/FRC technology: the future of biofunctional adhesive aesthetic dentistry.

With recent advancements in adhesive technology, restorative materials have evolved to an enhanced level of aesthetics while enabling more conservative cavity preparations and promoting reinforcement of the remaining tooth structure. These restorations have included both anterior and posterior treatment modalities applied directly and indirectly. With a growing awareness on the part of many patients of the possible cosmetic treatment alternatives came the desire for aesthetic, metal-free, durable restorations. This presentation discusses the material properties and clinical protocol of a new material which combines a ceramic optimized polymer with a fiber-reinforced framework for durable, aesthetic anterior and posterior restorations.

Adult↗
PubMedDate not supplied

Posterior composite resin restorations: assuring restorative integrity.

Vancouver practitioner William Liebenberg, with whose work FDI World readers will be familiar, here describes the techniques be applies to the creation of direct composite resin restorations. Sharing a number of his solutions to attaining adhesive excellence with posterior, tooth coloured restorations, Dr. Liebenberg uses a case study to illustrate the quest for aesthetically pleasing anatomical form, minimal postoperative sensitivity, and a durable bond.

Bicuspid↗