Multicenter study on visual color difference thresholds. A secondary analysis of light, medium, and dark tooth-colored specimens.

Purpose: This secondary analysis further analyzed variations in the 50:50% perceptibility and acceptability thresholds (PT and AT, respectively) pertaining to light, medium, and dark tooth-colored specimen sets.

Methods: Primary raw data from the original study was retrieved. Visual thresholds (Perceptibility - PT and Acceptability - AT) were analyzed among the three specimen sets - light, medium, and dark.

The Effectiveness of a Shade-Matching Training Program on the Dentists' Ability to Match Teeth Color.

Aim Of The Study: To study the effectiveness of a structured shade-match training program on dentists' ability to match teeth colors.

Methods: Forty dentists were selected by convenient sampling with normal color vision. The training program is based on visual attention concept and was divided into two parts (educational and training module).

The Effect of Color Training of Dental Students' on Dental Shades Matching Quality.

Objective: To assess the effect of color training on the dental shade matching quality of dental students of both gender and to study the need to include lectures and exercises about shade selection in the undergraduate dental curriculum.

Materials And Methods: One hundred and twenty junior dental students from the College of Dentistry at King Saud University participated in the present study and were distributed randomly into four testing groups. They were asked to match the color of four target shade tabs from the VITA Linearguide 3D-MASTER.

Color difference thresholds in dentistry.

Purpose: The aim of this prospective multicenter study was to determine 50:50% perceptibility threshold (PT) and 50:50% acceptability threshold (AT) of dental ceramic under simulated clinical settings.

Materials And Methods: The spectral radiance of 63 monochromatic ceramic specimens was determined using a non-contact spectroradiometer. A total of 60 specimen pairs, divided into 3 sets of 20 specimen pairs (medium to light shades, medium to dark shades, and dark shades), were selected for psychophysical experiment.

Long-term outcome of one-piece implants. Part II: Prosthetic outcomes. A systematic literature review with meta-analysis.

Purpose: To evaluate the long-term clinical performance of prosthetic reconstructions on one-piece implants, with a focus on technical and biological complications.

Materials And Methods: An electronic MEDLINE search complemented by a manual search was conducted to identify randomized and prospective controlled clinical trials on one-piece implants. Additional inclusion criteria were a mean follow-up period of at least 5 years and an inception cohort where more than 80% of the enrolled patients remained in the study at the 5- or 10-year observation point.

Volumetric measurements of removed tooth structure associated with various preparation designs.

The amount of tooth structure that is removed as a consequence of tooth preparation has rarely been quantified. The aim of this study was to quantify the volume of reduction of tooth structure associated with different commonly used preparation designs. Eighty extracted teeth were divided into eight groups according to the type of preparation design and tooth type.

Long-term outcome of one-piece implants. Part I: implant characteristics and loading protocols. A systematic literature review with meta-analysis.

Purpose: The aim of this systematic review was to evaluate the long-term clinical performance of one-piece implants.

Materials And Methods: An electronic MEDLINE search complemented by a manual search was conducted to identify randomized and prospective cohort studies on one-piece implants. Additional inclusion criteria were: a mean follow-up period of at least 5 years and an inception cohort where more than 80% of the enrolled patients remained in the study at the 5- or 10-year observation point.

Evaluation of self shade matching ability of dental students using visual and instrumental means.

Objectives: The purpose of this study was to evaluate the ability of dental students to match the shade of their own teeth.

Methods: Fifty female dental students in the College of Dentistry at King Saud University, who had not received any formal dental training in color science or shade matching procedures, were screened for color deficiencies and selected to participate in the study. Each subject and three clinicians selected independently the closest match for the subjects' own right or left sound maxillary central incisors under controlled viewing conditions, using VITA classical shade guide (VITA Zahnfabrik GmbH, Bad Säckingen, Germany).

Evaluation of color duplication in metal-ceramic complexes using visual and instrumental shade-matching systems.

This study was designed to evaluate color differences (DE) between intended and fabricated shades of various metal-ceramic complexes using visual and instrumental shade determination. Forty-two master disks were made to represent every tab in two shade guides. The shades of the master disks were determined visually and instrumentally.

Consistency in color parameters of a commonly used shade guide.

Objective: The use of shade guides to assess the color of natural teeth subjectively remains one of the most common means for dental shade assessment. Any variation in the color parameters of the different shade guides may lead to significant clinical implications. Particularly, since the communication between the clinic and the dental laboratory is based on using the shade guide designation.

Effect of surface treatment on the micro-shear bond strength to zirconia.

Unlabelled: The constant quest for finding the ultimate esthetic dental restorative material has led to numerous alternatives. These materials, in addition to possessing optical properties simulating natural teeth, should also have physical properties that can withstand the harsh oral environment. Due to their greater toughness, zirconium oxide materials have been used as a core material for all-ceramic restorations.

Fracture resistance and failure location of zirconium and metallic implant abutments.

Aim: The purpose of this study was to evaluate the fracture resistance and failure location of single-tooth, implant-supported, all-ceramic restorations on different implant abutments subjected to a maximum load.

Methods And Materials: Forty Certain 3i implants and 20 ITI Straumann implants were used in this study in combination with 20 UCLA abutments, 20 ZiReal abutments, and 20 synOcta Ceramic Blanks to form three groups according to abutment type. All 60 abutments were prepared with standard measurements: a 1.

Effect of different all-ceramic crown system on fracture resistance and failure pattern of endodontically treated maxillary premolars restored with and without glass fiber posts.

Endodontically treated teeth are traditionally restored with a crown to prevent fracture. The aim of this study was to compare the fracture resistance and failure modes of endodontically treated maxillary premolars treated with or without a fiber post and restored with different types of crowns. Eighty human maxillary premolars were selected.

Fracture resistance and failure patterns of endodontically treated mandibular molars restored using resin composite with or without translucent glass fiber posts.

The elastic modulus of the restorative material is important in restoring endodontically treated teeth. This study aimed to compare the fracture resistance and failure patterns of 90 mandibular molars restored using resin composites with or without fiber posts, with respect to the number of residual cavity walls. Five restoration types were performed corresponding to different wall defects (groups 1-5).

Adhesion between prefabricated fiber-reinforced posts and different composite resin cores: a microtensile bond strength evaluation.

Purpose: The aim of this study was to evaluate the bond strengths between various resin composites used as core materials (Multicore Flow, Ivoclar-Vivadent; Tetric Flow, Ivoclar-Vivadent; Filtek Flow, 3M-ESPE; Tetric Ceram, Ivoclar-Vivadent; Filtek Z250, 3M-ESPE), and an FRC post (FRC Postec Plus, Ivoclar-Vivadent) by means of the microtensile nontrimming technique.

Materials And Methods: Five experimental groups were used. For the microtensile nontrimming technique, 45 to 50 beam-shaped specimens per group were obtained from cylinders of core material, which had been built up around the post by progressively adding small increments of composite resin.

Sentiments expressed in relation to tooth loss: a qualitative study among edentulous Saudis.

Purpose: The objective was to explore and gain insight into the sentiments surrounding tooth loss in a group of edentulous Saudis.

Materials And Methods: Using a qualitative methodology, 44 edentulous patients who were receiving complete denture treatment were interviewed in private, in the Arabic language. Interviews were tape recorded and semistructured, following a list of predetermined and piloted topics, but dialogue also took place, with the freedom for both interviewer and interviewee to explore areas of interest.