Gingival margin stabilization using the final prosthetic restoration (BOPT). A case report.

One of the most contentious and extensively discussed topics in the field of dentistry when fabricating prosthetic restorations is the location and design of the finishing line in relation to the gingival tissues. Upon completion of the temporary crown and subsequent fabrication of the final restoration, two potential issues may arise: 1) the analog or digital impression may not accurately reflect the shape of the gingiva obtained with the temporary crown due to gingival collapse upon crown removal, even in the presence of retraction cords; and 2) the desired gingival shape may not have been achieved with the temporary crown. The objective of this article is to describe the stabilization of gingival tissues following twelve weeks of clinical observation.

Case report: Vertical preparation protocol for veneers.

The biologically oriented preparation technique (BOPT) consists of a vertical preparation of the tooth that involves a reduction to zero of the emergence anatomy, the creation of a new finish area, and immediate temporization, so that the gingiva is supported by a suitable prosthetic restoration. To this effect, it is not the restoration that adapts to the gingiva, but the gingiva that adapts to the restoration. This technique not only allows the gingiva around the tooth to stabilise, but over time it will also facilitate the achievement of a predictable coronal migration of the gingival margin.

Brain morphology correlates of learning and cognitive flexibility in a fish species ().

Determining how variation in brain morphology affects cognitive abilities is important to understand inter-individual variation in cognition and, ultimately, cognitive evolution. Yet, despite many decades of research in this area, there is surprisingly little experimental data available from assays that quantify cognitive abilities and brain morphology in the same individuals. Here, we tested female guppies () in two tasks, colour discrimination and reversal learning, to evaluate their learning abilities and cognitive flexibility.

Fractographic study of the behavior of different ceramic veneers on full coverage crowns in relation to supporting core materials.

Objectives: To observe porcelain veneer behavior of zirconia and metal-ceramic full coverage crowns when subjected to compression testing, comparing zirconia cores to metal cores.

Study Design: The porcelain fracture surfaces of 120 full coverage crowns (60 with a metal core and 60 with a zirconia core) subjected to static load (compression) testing were analyzed. Image analysis was performed using macroscopic processing with 8x and 12x enlargement.

Influence of bruxism on survival of porcelain laminate veneers.

Objective: This study aims to determine whether bruxism and the use of occlusal splints affect the survival of porcelain laminate veneers in patients treated with this technique.

Material And Methods: Restorations were made in 70 patients, including 30 patients with some type of parafunctional habit. A total of 323 veneers were placed, 170 in patients with bruxism activity, and the remaining 153 in patients without it.

Survival rates of a lithium disilicate-based core ceramic for three-unit esthetic fixed partial dentures: a 10-year prospective study.

Purpose: The aim of this prospective study was to evaluate the clinical efficacy and long-term survival rate of three-unit fixed partial dentures (FPDs) made from lithium disilicate-based core ceramic.

Materials And Methods: Twenty-one three-unit FPDs were placed in 19 patients to replace single lost teeth in the esthetic area, following a study protocol that took clinical, esthetic, and radiologic aspects into consideration. Each case was reviewed at 1 week following placement, at 6 months, and then annually for 10 years.

Bond strength of selected composite resin-cements to zirconium-oxide ceramic.

Objectives: The aim of this study was to evaluate bond strengths of zirconium-oxide (zirconia) ceramic and a selection of different composite resin cements.

Study Design: 130 Lava TM cylinders were fabricated. The cylinders were sandblasted with 80 µm aluminium oxide or silica coated with CoJet Sand.

Zirconia versus metal: a preliminary comparative analysis of ceramic veneer behavior.

Purpose: Clinical studies have revealed a high rate of fracture for porcelain-veneered zirconia-based restorations that varies between 6% and 15% over a 3- to 5-year period. These are high values compared to the 4% fracture rate shown by conventional metal-ceramic restorations over 10 years. To date, little in vitro research has been carried out on the fracture resistance of the new generation of ceramic crowns.

Full maxillary rehabilitation with an all-ceramic system.

With the appearance of all-ceramic systems, providing a choice of framework porcelains and allowing the same material to be used for the veneer, it is now possible to select the ideal structure in terms of both function and aesthetics. Silicate ceramics allow porcelain laminate veneers and crowns to be used in the anterior region, providing excellent aesthetics; while for the posterior area, where function takes precedence, oxide ceramics, specifically zirconium oxide, are preferred. The IPS e.

A clinical longitudinal study 323 porcelain laminate veneers. Period of study from 3 to 11 years.

Objective: The objective of this study was to evaluate the clinical results of 323 porcelain laminate veneers over a period of 3 to 11 years.

Material And Method: This study included 70 patients, aged between 18 and 74 years. Of the 323 total veneers, 124 were of a simple design and 199 were of a functional design.

In vitro experimental study of bonding between aluminium oxide ceramics and resin cements.

Unlabelled: To evaluate bond strengths of different resin cements to two aluminum oxide-based ceramics.

Methods: One hundred ten ceramic cylinders were produced and given four different surface treatments. Resin cement cylinders were then bonded to the ceramic cylinders using different resin cements and the bond strength was determined by shear testing to the breaking point.

Choice of ceramic for use in treatments with porcelain laminate veneers.

Porcelain laminate veneers (PLVs) have been used for over two decades to treat esthetic and/or functional problems, particularly in the anterior sector. A range of dental ceramic materials are presently available on the market for these treatments, though with very different characteristics in terms of the composition, optic properties and manufacturing processes involved. As a result, selection of the material best suited for the management of each individual patient may prove complicated.