Marginal and internal fit of four-unit zirconia fixed dental prostheses based on digital and conventional impression techniques.

Objectives: The aim of this in vitro study was to evaluate the marginal and internal fit of CAD/CAM-generated four-unit zirconia fixed dental prostheses made with digital and conventional impressions.

Materials And Method: A titanium master model was used. For group conventional impression (CI), 12 polyether impressions of the master model with Impregum(TM) were made.

Treatment concept with CAD/CAM-fabricated high-density polymer temporary restorations.

Tooth wear in younger patients is perceived worldwide as an increasing problem. Its etiology is multifactorial (erosion, abrasion, attrition), and its treatment is challenging for the dental practitioner specifically when a great loss of the vertical dimension of occlusion has occurred. The aim of this article is to present a treatment approach for complex cases with high loss of tooth structure using computer-aided design/computer-aided manufacturing (CAD/CAM)-fabricated temporary high-density polymer restorations without any preparations.

Dental erosion: understanding this pervasive condition.

Dental erosion is a contemporary disease, mostly because of the change of the eating patterns that currently exist in society. It is a "silent" and multifactorial disease, and is highly influenced by habits and lifestyles. The prevalence of dental erosion has considerably increased, with this condition currently standing as a great challenge for the clinician, regarding the diagnosis, identification of the etiological factors, prevention, and execution of an adequate treatment.

Cigarette smoke affects bonding to dentin.

This in vitro study evaluated the microtensile bond strength (muTBS) of composite resin bonded to dentin that had been contaminated by cigarette smoke. Ten extracted unerupted human third molars were used: Six molars were prepared for muTBS testing, while the other four molars were assigned to pre- and post-etching scanning electronic microscopy (SEM) analysis. The 20 specimens obtained from the 10 coronal portions were distributed into two experimental groups so that each tooth served as its own control.