Validation of pairs of antagonist teeth for the evaluation of shortened dental arch in epidemiological studies.

The aim of this study was to evaluate the accuracy of pairs of antagonist teeth (epidemiological criterion) for defining pairs of teeth in occlusal contact (clinical criterion) and to estimate the agreement between the prevalence of "shortened dental arch" (SDA) and "functional dentition" (FD) when occlusal units (OUs) or posterior occluding pairs (POPs) are defined by the epidemiological or clinical criterion. Data were collected in an epidemiological oral health survey conducted in a municipality in Minas Gerais, Brazil. OUs and POPs were defined by the epidemiological criterion (dental crown status) or clinical criterion "gold standard" (carbon paper record of occlusal contacts during habitual maximum intercuspation).

Definitive Presurgical CAD/CAM-Guided Implant-Supported Crown in an Esthetic Area.

This paper describes the digital workflow from cone beam computer tomography (CBCT) to the installation of a definitive presurgical zirconium individual crown in a 19-year-old woman requiring implant replacement of a maxillary right lateral incisor. The patient had agenesis of this tooth and had completed the orthodontic treatment. CBCT was conducted and diagnostic casts were digitized.

Effects of immediate and delayed intraradicular preparation on bond strength of fiber posts.

Background: To assist the retention of restorations prepared in endodontically treated teeth, fiber posts are widely used in dental practice. The ideal time to prepare space for the post is still controversial.

Aim: The purpose of this study was to evaluate the effects of immediate and delayed postspace preparation on the retention of the self-adhesive resin cement.

Accidental ingestion of an inter-occlusal device used for the restoration of occlusion: a case report.

The accidental swallowing of prosthetic devices has been discussed in the relevant literature as an unusual, although ordinary, event in clinical practice. This article aims at reporting the ingestion of an inter-occlusal device used to restore the Vertical Dimension of Occlusion (VDO) which, during the ingestion of an analgesic pill, was accidentally swallowed. The patient was sent to the Clinics Hospital UFMG where, upon taking radiographs, the device was located in the upper third of the esophagus.

Increased vertical dimension of occlusion: signs, symptoms, diagnosis, treatment and options.

During the planning of oral rehabilitation, the vertical dimension of occlusion (VDO) is one of the first parameters to be measured since its improper restoration can lead to the failure of any prosthetic rehabilitation. A decreased VDO can lead to the appearance of lesions, such as angular cheilitis, facial disharmony, and temporomandibular disorders; meanwhile, an increased VDO may lead to the onset of joint and muscle pain, tension in functional speech, difficulty in swallowing, impaired chewing, tooth sensitivity due to traumatogenic forces, pathologic bone resorption, abnormal wearing of teeth, the appearance of an elongated face, and a facial expression of fatigue. Most scientific articles deal with methods and techniques for re-establishing VDO in edentulous patients or those who have lost their tooth reference due to prosthetic preparations.

Invasive cervical resorption: etiology, diagnosis, classification and treatment.

Background: Invasive cervical resorption (ICR) is not well understood by the professional, being misdiagnosed, leading to inappropriate treatment and unnecessary loss of tooth.

Introduction: ICR is defined as a localized process of resorption, which begins in the cervical area of the tooth, just below the epithelial junction and above the ridge crest in the area of the connective tissue insertion. Possible predisposing factors include external trauma, orthodontic movement, surgical procedures, periodontal disease and its treatments, endogenous bleaching, pressure generated by wind instruments and herpes virus infection.

Influence of surface area and geometry of specimens on bond strength in a microtensile test: an analysis by the three-dimensional finite element method.

Purpose: This study employed three-dimensional (3D) finite element analysis to investigate the stress distribution patterns in a microtensile test with the goal of evaluating the effects of the bond surface area and geometry on bond strength.

Materials And Methods: Finite element models of six specimens were generated: three stick models and three hourglass models. All models simulated the bond strength between dentin and ceramic.

Combined technique with dentin post reinforcement and original fragment reattachment for the esthetic recovery of a fractured anterior tooth: a case report.

This case report describes the esthetic and functional recovery of a maxillary central incisor. The treatments used were dentin post (biological post) reinforcement and reattachment of the fragment. From the outcomes achieved, it can be concluded that this technique is promising and is yet another alternative method that can be used for the recovery of fractured anterior teeth.

Effects of surface treatment on the microtensile bond strength of ceramic materials to dentin.

This study evaluated the effects of distinct surface treatments on the micro-tensile bonding strength (microTBS) of different ceramic materials. The occlusal surfaces of eighteen human maxillary molars were flattened perpendicularly to the long axis and divided in groups based on surface treatment (sandblasting: s; hydrofluoric acid: a; tribochemical silica coating: t): DP-s, DP-a, DP-t, IE-s, IE-a, IE-t, IC-s, IC-a, IC-t) and ceramic materials (Duceran Plus: DP, IPS Empress 2: IE, In-Ceram Alumina, IC). Panavia F luting resins were used according to the manufacturers' instructions to bond ceramic materials to the exposed dentin specimens under a load of 7.

Tensile bond strength of self-etching versus total-etching adhesive systems under different dentinal substrate conditions.

The use of acid etchants to produce surface demineralization and collagen network exposure, allowing adhesive monomers interdiffusion and consequently the formation of a hybrid layer, has been considered the most efficient mechanism of dentin bonding. The aim of this study was to compare the tensile bond strength to dentin of three adhesive systems, two self-etching ones (Clearfil SE Bond--CSEB and One Up Bond F--OUBF) and one total-etching one (Single Bond--SB), under three dentinal substrate conditions (wet, dry and re-wet). Ninety human, freshly extracted third molars were sectioned at the occlusal surface to remove enamel and to form a flat dentin wall.

Analysis of camphorquinone in composite resins as a function of shade.

Objective: To identify and quantify the camphorquinone (CQ) used in different brands of composite resins as a function of the shade analyzed.

Materials And Methods: Filtek Z250 A3 (FZA3), Filtek Z-250 Incisal (FZI), Pyramid Enamel A1 (PEA1), Pyramid Enamel Translucent (PET), Filtek Supreme A3E (FSA3) and Filtek Supreme GT (FSGT) were used. Five hundred milligrams of each resin were weighed and then dissolved in 1.