Noncarious cervical lesions: Response from a 25-year clinical follow-up study.

Statement Of Problem: The etiology and diagnosis of noncarious cervical lesions (NCCLs) remain poorly understood.

Purpose: The purpose of this clinical study was to examine NCCL progression in an existing group of participants, establish the incidence of new NCCLs in a 25-year follow-up study, and relate them to possible risk factors, including occlusal factors.

Material And Methods: Thirty-three participants who had completed a questionnaire about their habits, diet, and personal information were evaluated in this observational retrospective study.

Development of clinical criteria for the evaluation of indirect restorations.

Objective: To propose the development and validation of criteria for evaluating the clinical performance of indirect restorations, considering the variables related to the operator, material, and/or patient.

Materials And Methods: The experimental design of this study was divided into three stages. Stage 1: development of the new criteria items by specialists in Prosthodontics.

Filling Materials Efficacy on Preventing Biofilm Formation Inside Screw Access Channels of Implant Abutments.

The choice of the material used to fill screw access channels in implant-supported prostheses depends, in most cases, on operator's preference, without considering the susceptibility of biofilm colonization. Therefore, the aim of this study was to determine and compare the total amount of biofilm formed on different materials used to fill screw access channels in implant abutments. For this propose, titanium implant analogs were attached on abutments and divided into 5 groups: positive control (no filling material); negative control (closed with resin); and filled with cotton, gutta-percha, or polytetrafluoroethylene (PTFE).

In vitro evaluation of physicochemical properties of soft lining resins after incorporation of chlorhexidine.

Statement Of Problem: Incorporating chlorhexidine into soft lining materials has been suggested to reduce biofilm development on the material surface and treat denture stomatitis. However, evaluation of the physicochemical properties of this material is necessary.

Purpose: The purpose of this in vitro study was to evaluate the physicochemical properties of resin-based denture soft lining materials modified with chlorhexidine diacetate (CDA).

Evaluation of the physical and antifungal effects of chlorhexidine diacetate incorporated into polymethyl methacrylate.

Objective: This study aimed to evaluate the physical properties and antifungal activities of polymethyl methacrylate (PMMA) acrylic resins after the incorporation of chlorhexidine diacetate salt (CDA).

Methodology: First, acrylic resin specimens were fabricated with Vipi Cor® and DuraLay® resins with and without the incorporation of 0.5%, 1.

Do Oblique Cyclic Loads Influence the Tensile Strength of Different Morse Taper Connection Abutments?

Purpose: The purpose of this in vitro study was to evaluate the behavior of abutments attached to Morse taper connection implants, with and without internal index, against oblique cyclic loads.

Materials And Methods: Twenty test pieces composed of abutments connected to Morse taper implants solely by friction action were subdivided into two groups (n = 10): group NI (no index) and group I (index). The test units were submitted to tensile tests, before and after cycling loads.

Evaluation of polymethyl methacrylate containing chlorhexidine: A randomized, controlled, split-mouth in situ study.

Purpose: To evaluate the antimicrobial action and elemental composition of chlorhexidine (CHX) diacetate in acrylic resins based on PMMA (polymethyl methacrylate) in situ. In addition, ex vivo evaluation of the CHX release mechanism was performed over a 14-day period.

Methods: Three discs of PMMA incorporating CHX and three control discs were mounted on individual oral splints and exposed to the oral cavity of 32 participants for 24 hours.

Edentulism in Brazil: trends, projections and expectations until 2040.

The aim of this study was to examine the edentulism rates in Brazil and make projections for the next years. Data were collected from three national oral health surveys. The percentage of edentulous jaws was calculated.

Osseointegrated implants placed at supracrestal level may harbour higher counts of A. gerencseriae and S. constellatus - a randomized, controlled pilot study.

Purpose: This study aimed at evaluating the bacterial colonization in dental implants inserted in the crestal or supracrestal position and correlated it to radiographic bone measurements.

Methods: Thirty-five implants with regular platform in nine patients (mean age 62.4±11.

The use of CAD/CAM technology to fabricate a custom ceramic implant abutment: a clinical report.

Well-placed dental implants are a prerequisite of functional and esthetically successful dental implant-supported crowns. The presence of soft tissue is essential for excellent esthetics because the dental implant or titanium abutment may become visible if the soft-tissue contour is not acceptable. This clinical report describes the use of a custom ceramic implant abutment designed with computer-aided design and computer-aided manufacturing (CAD/CAM) technology by milling a zirconia framework that was cemented extraorally to a prefabricated titanium abutment with a reduced diameter.

Dimensional changes in gypsum fragments bonded with cyanoacrylate.

Purpose: Accidental fractures may occur during manipulation and transportation of plaster casts. In clinical practice, plaster fragments may be bonded without harming the accuracy of the final denture, provided that the bonding agent does not cause dimensional alterations. Cyanoacrylate could be a good material because of its ease of use, quick set, wide availability, and low cost.

Torque removal evaluation of prosthetic screws after tightening and loosening cycles: an in vitro study.

Objectives: The aim of this study was to evaluate the variation in removal torque of implant prosthetic abutment screws after successive tightening and loosening cycles, in addition to evaluating the influence of the hexagon at the abutment base on screw removal torque.

Material And Methods: Twenty hexagonal abutments were tightened to 20 regular external hex implants with a titanium alloy screw, with an insertion torque of 32 N cm, measured with a digital torque gauge. The implant/abutment/screw assemblies were divided into two groups: (1) abutments without hexagon at the base and (2) abutments with a hexagon at the base.

A rationale method for evaluating unscrewing torque values of prosthetic screws in dental implants.

Objectives: Previous studies that evaluated the torque needed for removing dental implant screws have not considered the manner of transfer of the occlusal loads in clinical settings. Instead, the torque used for removal was applied directly to the screw, and most of them omitted the possibility that the hexagon could limit the action of the occlusal load in the loosening of the screws. The present study proposes a method for evaluating the screw removal torque in an anti-rotational device independent way, creating an unscrewing load transfer to the entire assembly, not only to the screw.