Telescopic copings in restorative dentistry

The complete mouth reconstruction of a periodontally compromised dentition is a tremendous challenge. Although the treatment is complex, the rewards can be satisfying. In some cases, the use of telescopic copings overcomes several of the problems associated with periodontal prosthetic treatment. This article reviews the advantages and disadvantages in the use of telescopic copings in restorative dentistry.     

Periodontal surgery as an adjunct to endodontics, orthodontics, and restorative dentistry

Periodontal surgery and biologic principles can be used to treat a variety of restorative and endodontic complications. Four cases illustrated the application of orthodontic therapy and periodontal surgery in the treatment of these difficulties.     

Orthodontic intervention in adult patients as an adjunct to prosthetic and restorative dentistry.

Combined orthodontic-prosthodontic procedures will enhance the results of restorative treatment in adult patients. Restoration of malposed teeth using prostheses alone will fail both esthetically and functionally. Rotation, spacing or crowding and tipped teeth will compromise the final restoration if left untreated. Correction of axial inclination will prevent pulp exposure during preparation, as well as improving the periodontal status of the involved teeth. Cooperation between the orthodontist and the prosthodontist will ensure a more favorable final result. Cases treated in this manner are presented, illustrating the orthodontic treatment and the successful end results.     

The use of resin cements in restorative dentistry to overcome retention problems

The use of resin cements in combination with dentin bonding agents can result in superior attachment of prostheses to tooth structure. This paper describes four clinical cases in which dentin-bonded resin cements were used to overcome retention problems. In the first case, a detached fixed partial denture, which was in good condition when separated, was recemented to abutment teeth prepared with less-than-ideal angle of convergence. In the second case, a detached all-porcelain crown was recemented with a dentin-bonded resin cement after appropriate surface treatment. In the third case, a porcelain-fused-to-metal crown made for a molar tooth was cemented to a short clinical crown, avoiding crown-lengthening surgery. In the fourth case, a 3-unit fixed partial denture was recemented to abutments with less-than-ideal supporting features. Dentin-bonded resin cements can help to extend the life of detached prostheses until the patient is financially prepared for replacement or it can help to avoid crown-lengthening surgery.     

Reproducibility of different arrangement of resin copings by dental microstereolithography: Evaluating the marginal discrepancy of resin copings

Statement of problem

Microstereolithography (μ-SLA), a form of additive manufacturing, can produce one or more platforms of resin copings. However, no evaluation has been made of the variation in marginal discrepancy using this method, even though this is an important factor for a successful restoration.

Implant prosthodontics contribute to restorative dentistry

This paper is directed toward dental practitioners who accomplish the prosthodontic procedures for dental implants. It includes a discussion of most of the major steps in current implant dentistry. Several implant systems are compared with a look at the future of implant prosthodontics.     

Light-activated composite resin as an adjunct to the fabrication of fixed partial denture prosthesis

A technique that permits characterization of provisional restorations with bonding procedures is described. On completion, a glaze of unfilled resin is added to ensure a smooth, nonporous, biologically compatible restoration. Shade tabs are custom stained for dental laboratory use.     

Mechanisms of goniochromism relevant to restorative dentistry

ObjectivesThis study aims to determine the effects of multiple translucent layers, the alignment of composite structures, and specular reflecting backings as goniochromatic mechanisms relevant to dentistry.MethodsRectangular composite specimens were filled with very short E-glass fibers (120 μm length, 16 μm diameter). The fibers were oriented random, perpendicular, and parallel to the surface normal using an electric field. A Minolta CS-100 colorimeter was used to measure the color at various angles of samples with various filler alignments, translucent sublayers, and specular reflecting backings.ResultsAll three investigated mechanisms were proven to have a goniochromatic effect. Filler alignment perpendicular to the surface made the composites more transmissive and reduced the dependence of lightness on observation angle. Backing composites with a pigmented sublayer caused the color of the sublayer to be more apparent when the observation angle is perpendicular to the surface. The specular reflection of a gold backing was only partially diffused by the specimen.SignificanceThe determination of the effects of these goniochromatic mechanisms is relevant to dentistry, because teeth are naturally aligned composites composed of multiple translucent layers. Therefore, understanding these goniochromatic effects is important to recreating them in restorative materials. Also, gold backings were previously found to give restoratives a more vital appearance, and this perceived vitality may be related to goniochromism.