Strain Behavior of Implant-Supported Full-Arch Fixed Dental Prostheses Supported by Four or Five Implants.

Purpose: Strains transferred to the supporting simulated bone structure by implant-supported full-arch fixed dental prostheses (FAFDPs) were analyzed by digital image correlation (DIC).

Materials And Methods: Polyurethane models were made using 3.75 × 11-mm implants and divided into the following groups with different implant numbers and design: EH5 (five implants/external hexagon), MT5 (five implants/internal taper), EH4 (four implants/external hexagon), and MT4 (four implants/internal taper).

Comparative analysis of elastomeric die materials for semidirect composite restorations.

Aim: Die silicone materials are used to build chairside composite restorations. The purpose of this study was to compare the flowability, dimension accuracy, and tear strength of four elastomeric die materials.

Material And Methods: Materials were divided into four groups: Mach-2 (M2), Scan Die (SD), GrandioSO Inlay System (GIS), and Impregum-F (IM).

Color stability and surface roughness of composite resins submitted to brushing with bleaching toothpastes: An in situ study.

Objective: To evaluate, in situ, the color stability (CS) and surface roughness (SR) of composite resins after toothbrushing with whitening toothpaste.

Materials And Methods: Specimens (6 × 2 mm/) of composite resin (Tetric N-Ceram, Z250 and Z350) were randomly fixed on thirty participants' upper molars (buccal surface). For an initial standardization (7 days), participants used a soft toothbrush and nonwhitening toothpaste (SDB - Sorrisos Dentes Brancos).

Breakage of a catheter in the epidural space.

Background And Objectives: Breakage of epidural catheters during their removal is rare, but it has been described. The anesthesiologist should be aware of the complications and proper handling of those catheters. The objective of this report was to present a case of breakage of an epidural catheter in labor analgesia.