Evaluation of implant-supported connecting crowns fabricated by optical and conventional impression methods.

Purpose To investigate the accuracy of implant-supported connecting crowns fabricated with digital definitive casts and conventional definitive casts.Methods Using a master model with two implant bodies inserted into the right mandibular molar area, 10 digital definitive casts were fabricated. Additionally, 10 conventional definitive casts were fabricated.

Application of alumina coping to porcelain laminate veneered crown: part 1 masking ability for discolored teeth.

A densely sintered high-purity alumina has been successfully utilized as a coping for all-ceramic crown. In order to apply the alumina coping to the porcelain laminate veneer restoration for the discolored teeth, the present study evaluated its masking ability when it was thinner than the proposed thickness for the crown. Colorimetric examination was performed on white and black backgrounds for the 0.

The effects of abutment taper, length and cement type on resistance to dislodgement of cement-retained, implant-supported restorations.

Purpose: The purpose of this study was to compare the effect of 20 degrees and 30 degrees of total occlusal convergence (TOC), the occlusocervical dimension, and the type of cement on the tensile resistance to dislodgement of cement-retained, implant-supported restorations.

Materials And Methods: Cylindrical preparations with TOC angles of 20 degrees and 30 degrees and occlusocervical dimensions of 4 mm (S) and 8 mm (L) were made through a machining process. The cylinders had a shoulder finish line of 1.

A multicenter interracial study of facial appearance. Part 2: A comparison of intraoral parameters.

Purpose: This article compares interracial or gender differences of six intraoral dental parameters among six racial groups (African American, Caucasian, Chinese, Hispanic, Japanese, and Korean).

Materials And Methods: The same 253 patients participating in part 1 were included in this portion of the study to evaluate six intraoral parameters. The data were collected and analyzed using a one-way analysis of variance, followed by the Tukey-Kramer test for honestly significant difference when statistically significant differences were found (P < .

A multicenter interracial study of facial appearance. Part 1: A comparison of extraoral parameters.

Purpose: This study was undertaken to compare the facial appearance of patients from six racial groups (African American, Caucasian, Chinese, Hispanic, Japanese, and Korean) for interracial and/or gender differences and to determine if "norms" existed.

Materials And Methods: A total of 253 subjects (144 men and 109 women) ranging in age from 18 to 41 years (mean age 26.5 years) were evaluated using a standardized protocol.