Influence of porcelain-firing procedures on the marginal distortion of electroformed metal-ceramic restorations.

Objective: To evaluate the influence of firing procedures on the marginal distortion of electroformed metal-ceramic crown restorations.

Method And Materials: Twenty-four standardized specimens were fabricated using a gold-electroforming system and were characterized by 3 finish line forms: shoulder (S-type), rounded shoulder (RS-type), and deep chamfer (DC-type) preparations. Marginal discrepancies were measured at 6 stages: before the firing procedures, after the gold-bonder application, after the opaque porcelain firing, after the dentin porcelain firing, after the enamel porcelain firing, and after the glazing firing.

Influence of temporary cements on bond strength between resin-based luting agents and dentin.

Purpose: To examine the influence of temporary cements on the strength of the bond formed between resin-based luting agents and dentin.

Methods: An acrylic resin plate was luted to bovine dentin using one of three temporary cements; HY-Bond Temporary Cement Hard (HYB), Freegenol Temporary Pack (FTP), or Neodyne T (NDT). The control group (CON) was not treated with cement.

Influence of abutment materials on the resultant color of heat-pressed lithium disilicate ceramics.

The purpose of this study was to evaluate the influence of abutment materials on the color of IPS Empress 2 ceramic coping with different thicknesses. Ceramic coping specimens (12.0x12.

Influence of finish line design on marginal adaptation of electroformed metal-ceramic crowns.

Statement Of Problem: Gold electroformed metal-ceramic restorations have been promoted as alternatives to conventional metal-ceramic restorations. However, little is known about the relationship between tooth preparation design and marginal adaptation for this type of crown.

Purpose: This study evaluated the influence of 3 different finish line designs on the marginal adaptation of electroformed metal copings and metal-ceramic crowns.

In vivo quantitative evaluation of tooth color with hand-held colorimeter and custom template.

This article presents a technique for quantitatively evaluating the color of teeth, as well as color change in restorations and tooth surfaces. Through use of a custom template made of a thermoplastic polymer and a dental colorimeter, tooth surface color can be recorded periodically at the same location intraorally.