Clinical marginal fit of zirconia crowns and patients' preferences for impression techniques using intraoral digital scanner versus polyvinyl siloxane material.

Statement Of Problem: The use of digital intraoral scanners is increasing; however, evidence of its precision in making crown impressions clinically remains scarce. Patients should also feel more comfortable with digital impressions, but only a few studies evaluating this subject have been performed.

Purpose: The purpose of this clinical study was to evaluate the marginal fit of monolithic zirconia crowns and patients' preferences for digital impressions versus polyvinyl siloxane (PVS) impressions.

Effectiveness of a motionless ultrasonic toothbrush in reducing plaque and gingival inflammation in patients with fixed orthodontic appliances.

Objective: To compare the effectiveness of a motionless ultrasonic toothbrush to a manual toothbrush in reducing dental plaque, gingival inflammation, and mutans streptococci in patients with fixed orthodontic appliances.

Materials And Methods: Twenty-five orthodontic patients were recruited to this crossover study. The patients were randomized into two groups starting with manual or motionless ultrasonic toothbrushes for 30 days.

Fracture Resistance of Lithium Disilicate Ceramics Bonded to Enamel or Dentin Using Different Resin Cement Types and Film Thicknesses.

Purpose: To investigate the influence of cement film thickness, cement type, and substrate (enamel or dentin) on ceramic fracture resistance.

Materials And Methods: One hundred extracted human third molars were polished to obtain 50 enamel and 50 dentin specimens. The specimens were cemented to 1-mm-thick lithium disilicate ceramic plates with different cement film thicknesses (100 and 300 μm) using metal strips as spacers.

Wear of human enamel opposing monolithic zirconia, glass ceramic, and composite resin: an in vitro study.

Statement Of Problem: Demand is increasing for ceramic and composite resin posterior restorations. However, ceramics are recognized for their high abrasiveness to opposing dental structure.

Purpose: The purpose of this study was to investigate the wear of enamel as opposed to dental ceramics and composite resin.

The influence of finish line curvature on the marginal gap width of ceramic copings.

Statement Of Problem: As a result of natural tooth anatomy or gingival recession, anterior teeth are more likely to present increased abutment finish line curvature.

Purpose: The purpose of this study was to investigate the influence of the curvature of the finish line on the marginal gap widths of ceramic copings.

Material And Methods: An ivorine maxillary central incisor was prepared for 3 different abutment finish line curvatures (1, 3, and 5 mm).

Anterior space management: interdisciplinary concepts.

Unlabelled: This case report describes the treatment of one patient with maxillary anterior spacing, caused by bilateral lateral peg-shaped incisors, using a planned sequence of multidisciplinary approaches for esthetic treatment. An asymmetrical gingival line was visible when the patient smiled. To evaluate the desired gingival level and the proportion of restoration to be made using the recurring esthetic dental (RED) proportion method, a diagnostic wax-up model was fabricated.

Surface Hardness of Resin Cement Polymerized under Different Ceramic Materials.

Objectives. To evaluate the surface hardness of two light-cured resin cements polymerized under different ceramic discs. Methods.

Clinical evaluation of a resin-modified glass-ionomer liner for cervical dentin hypersensitivity treatment.

Purpose: To evaluate the effectiveness of two agents for treating cervical dentin sensitivity associated with gingival recession or noncarious cervical lesions.

Methods: 44 patients with at least mild sensitivity affecting cervical dentin were enrolled in a longitudinal randomized clinical trial. A resin-based desensitizer or an experimental glass-ionomer was assigned to treat at most two teeth from each side of the mouth.