Comparison of the marginal fit of pressable ceramic to metal ceramic restorations.

Purpose: The aim of this in vitro study was to compare the marginal adaptation of a pressed ceramic material, when used with and without a metal substructure, to a traditional feldspathic porcelain-fused-to-metal restoration with a porcelain butt margin.

Materials And Methods: A maxillary central incisor typodont tooth was prepared with a 1.5 mm 360 degrees shoulder with rounded internal line angle, and 30 polyether impressions were made.

Ceramic pressed to metal versus feldspathic porcelain fused to metal: a comparative study of bond strength.

Purpose: The aim of this study was to compare the debond/crack initiation strength (D/CIS) of a leucite-based low-fusing ceramic pressed (PC) to metal and feldspathic porcelain (FP) fused to metal.

Materials And Methods: Forty rectangular metal specimens, 20 noble alloy (NA; gold-palladium) and 20 base metal alloy (BA; cobalt-chromium) were fabricated per ISO 9693:1999 standards (25.0 mm x 0.

Retention of teeth versus extraction and implant placement: treatment preferences of dental faculty and dental students.

The purpose of this study was to determine the treatment preferences amongst dental faculty and dental students for either retention of teeth by endodontic and restorative treatment or extraction and implant placement. A survey of 134 general dentistry faculty and 253 senior (fourth-year) dental students was conducted in a university college of dentistry. Participants completed a survey consisting of questions for which one of two choices could be selected.

An evaluation of wear when enamel is opposed by various ceramic materials and gold.

Statement Of Problem: Ceramic restorations have been known to cause wear of opposing enamel.

Purpose: The purpose of this study was to evaluate enamel wear caused by 3 ceramic substrates in the glazed and polished conditions.

Material And Methods: Sixty ceramic discs (10 x 2 mm)-20 each of Finesse, All-Ceram, and IPS-Empress-were prepared and glazed.

Comparison of bond strength of a pressed ceramic fused to metal versus feldspathic porcelain fused to metal.

Purpose: To compare the debonding/crack initiation strength (D/CIS) of a low-fusing pressable leucite-based glass ceramic (PC) fused to metal to a feldspathic porcelain (FP) fused to metal.

Materials & Methods: As per ISO 9693:1999, 40 rectangular metal specimens (25.0 mm x 0.

In vivo correlation of noncarious cervical lesions and occlusal wear.

Statement Of Problem: The etiology of noncarious cervical lesions is not well understood. An understanding of the etiology helps the clinician determine appropriate treatment and management strategies. Purpose This study evaluated the relationship between noncarious cervical lesions and occlusal (or incisal) wear.

Marginal fit of leucite-glass pressable ceramic restorations and ceramic-pressed-to-metal restorations.

Statement Of Problem: Fabricating a feldspathic porcelain margin on a metal-ceramic restoration with a clinically acceptable marginal fit has proven to be a technique-sensitive procedure. Pressable ceramics are advocated to solve this problem.

Purpose: The purpose of this in vitro study was to compare the marginal adaptation of a pressable ceramic system when used with both all-ceramic and metal-ceramic crowns, with a traditional metal-ceramic restoration.

Assessment of sensitivity and specificity of clinical evaluation of cast restoration marginal accuracy compared to stereomicroscopy.

Statement Of Problem: One of the most important criteria for the clinical acceptability and longevity of cast restorations is marginal adaptation. However, there is limited information on the accuracy of commonly practiced evaluation techniques.

Purpose: This study assessed the effect of preparation design on marginal adaptation.

The repeatability of an intraoral dental colorimeter.

Statement Of Problem: Characterizing and reproducing color remain one of the most challenging aspects of dentistry. A relatively new intraoral colorimeter measures the color of natural teeth and metal-ceramic restorations and prints out a color recipe for the Vintage Halo Porcelain System. The reliability of the colorimeter is unknown.

In vivo evaluation of three cleansing techniques for prepared abutment teeth.

Statement Of Problem: Residual provisional cement and debris on prepared teeth may have the potential to negatively influence the performance of the definitive luting agent.

Purpose: This in vivo study quantified the adherence of provisional cement to abutment teeth prepared with 1 of 2 textures (coarse or fine) and cleaned with 1 of 3 common cleansing techniques.

Material And Methods: One hundred ten provisional restorations in 22 patients were luted to maxillary anterior abutment teeth.