Effect of different surface treatments on surface roughness, phase transformation, and biaxial flexural strength of dental zirconia.

Interfacial failures at the cement‒restoration interface highlights the importance of effective surface treatment with no adverse effect on the zirconia's mechanical properties. This study aimed to determine the effect of different surface treatments on dental graded zirconia's surface roughness and certain mechanical properties. Forty sintered zirconia specimens were randomly divided into four groups (n=10): control (no surface treatment), sandblasting (SA), grinding with diamond bur (GB), and Er,Cr:YSGG laser (LS).

Prevalence of Complete Edentulism in Individuals at Least 30 Years Old in Iran since 2000: A Systematic Review.

Background: The purpose of this study was to systematically review the literature to investigate the prevalence of complete edentulism in Iran.

Method: An electronic search was performed using three scientific databases: PubMed, Google Scholar, and Irandoc. Moreover, a hand search was performed on theses in the Dental Faculty of Shahed University.

Stress distribution of esthetic posts in the restored maxillary central incisor: Three-dimensional finite-element analysis.

Background: Glass fiber posts, along with their esthetic properties, may have a better stress distribution than cast posts, Therefore, the aim of the present study was to investigate the effect of glass fiber, casting, titanium, and zirconia posts on stress distribution in maxillary central tooth treated with different amounts of ferrule using finite-element analysis.

Materials And Methods: In this experimental study, three-dimensional models of maxillary central incisors that have undergone root canal treatment were designed. Then, the models were divided into four groups according to the type of post (Ni-Cr casting, glass fiber, titanium, and zirconia) used.

Efficiency of Erbium-Doped Yttrium Aluminum Garnet Laser in Debonding Cemented Glass Fiber Posts: an Study.

Statement Of The Problem: The efficacy of erbium-doped yttrium aluminum garnet (Er; YAG) laser on the debonding properties of certain post materials has remained largely unexplored.

Purpose: This study aimed to investigate the effect of Er; YAG laser irradiation on debonding of cemented glass fiber posts in root canal treated teeth.

Materials And Method: In this study, forty root canal treated mandibular premolar teeth were used in this study.

In vitro evaluation of the accuracy and precision of intraoral and extraoral complete-arch scans.

Statement Of Problem: The accuracy of intraoral and extraoral scanners for different models of edentulousness is unclear.

Purpose: The purpose of this in vitro evaluation was to determine the accuracy (trueness and precision) of complete-arch scans made by 3 intraoral and 1 extraoral scanners compared with an industrial 3D scanner.

Material And Methods: Digital scans were made of a reference cast with 3 intraoral scanners (CEREC Omnicam; Dentsply Sirona, TRIOS 3; 3shape A/S; Carestream CS 3600; Carestream Dental) and an extraoral scanner (Deluxe scanner; Open Technologies).

Effects of interimplant distance and cyclic dislodgement on retention of LOCATOR and ball attachments: An in vitro study.

Statement Of Problem: Evaluation of the long-term retentive behavior of overdenture attachments is necessary for successful treatment. Interimplant distance (IID) could affect the retention of these attachments.

Purpose: The purpose of this in vitro study was to assess the effects of IID and cyclic dislodgement on the retention of LOCATOR and ball attachments.

Comparison of marginal and internal fit of 3-unit zirconia frameworks fabricated with CAD-CAM technology using direct and indirect digital scans.

Statement Of Problem: Accurate marginal and internal fit of dental restorations are essential for their long-term success. The fit of zirconia restorations prepared using digital scan systems has not been fully evaluated.

Purpose: The purpose of this in vitro study was to compare the marginal and internal fit of 3-unit zirconia frameworks fabricated using direct and indirect digital scans.

Effect of Silane Heat Treatment by Laser on the Bond Strength of a Repair Composite to Feldspathic Porcelain.

Purpose: Ceramic restoration fracture may occur in the oral cavity. Intraoral repair of fractured porcelain could be advantageous to both patient and dentist. The aim of this study was to evaluate the effect of heat treatment of the silane coupling agent by Er:YAG and CO lasers on the microshear bond strength of a repair composite to feldspathic porcelain.

The effect of luting agent on the fracture resistance of root canal treated teeth restored with casting post.

Introduction: The aim of this study was to determine the effect of different luting agents on fracture resistance of endodontically treated teeth restored with casting post.

Materials And Methods: In this experimental study, forty extracted human maxillary central incisors teeth with the mean length of 23mm were randomly assigned in to four groups. All the studied teeth were caries free without any crack.