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.

Influence of Abutment Fabrication Method on 3D Fit at the Implant-Abutment Connection.

Purpose: To three-dimensionally evaluate the internal fit at the implant-abutment interface of abutments fabricated with different workflows using a combination of the silicone replica technique and microcomputed tomography (μCT).

Materials And Methods: Thirty abutments were fabricated to restore internal-connection implants and were divided into three groups according to fabrication method: (1) full digital (abutment machined using CAD/CAM system); (2) Ti-Base (prefabricated standard Ti-Base abutments); and (3) UCLA (UCLA-type abutments) (n = 10/group). Linear and volume measurements were performed to assess the internal misfit using a silicone replica of the implant-abutment interface misfit area, which was three-dimensionally reconstructed after μCT.

Influence of the composition and shades of ceramics on light transmission and degree of conversion of dual-cured resin cements.

Objective: Since the transmittance of ceramics can influence the degree of conversion (DC) of resin cements, ceramics composition and shade should be considered in the selection of resin cement. This in vitro study aimed to evaluate the effect of the transmittance of different composition, opacities and shades of ceramics on the degree of conversion of two dual-cured resin cements.

Methodology: Sixty discs were prepared from low translucency (LT) and medium opacity (MO) lithium disilicate ceramic, and zirconia ceramic (Z).

Differences in Cortical Structure and Functional MRI Connectivity in High Functioning Autism.

Autism spectrum disorders (ASD) represent a complex group of neurodevelopmental conditions characterized by deficits in communication and social behaviors. We examined the functional connectivity (FC) of the default mode network (DMN) and its relation to multimodal morphometry to investigate superregional, system-level alterations in a group of 22 adolescents and young adults with high-functioning autism compared to age-, and intelligence quotient-matched 29 healthy controls. The main findings were that ASD patients had gray matter (GM) reduction, decreased cortical thickness and larger cortical surface areas in several brain regions, including the cingulate, temporal lobes, and amygdala, as well as increased gyrification in regions associated with encoding visual memories and areas of the sensorimotor component of the DMN, more pronounced in the left hemisphere.

Influence of curing protocol and ceramic composition on the degree of conversion of resin cement.

Objective: Due to increasing of aesthetic demand, ceramic crowns are widely used in different situations. However, to obtain long-term prognosis of restorations, a good conversion of resin cement is necessary. To evaluate the degree of conversion (DC) of one light-cure and two dual-cure resin cements under a simulated clinical cementation of ceramic crowns.

Effects of the type and thickness of ceramic, substrate, and cement on the optical color of a lithium disilicate ceramic.

Statement Of Problem: Reproducing the characteristics of natural teeth in ceramic crowns remains a complex and difficult process.

Purpose: The purpose of this in vitro study was to evaluate the effect of the substrate, cement, type, and thickness of the ceramic on the resulting color of a lithium disilicate ceramic.

Material And Methods: Forty ceramic disks were prepared from IPS e.

Relation between aerobic fitness and brain structures in amnestic mild cognitive impairment elderly.

Mild cognitive impairment (aMCI) is a clinical condition, with high risk to develop Alzheimer's disease. Physical exercise may have positive effect on cognition and brain structure in older adults. However, it is still under research whether these influences are true on aMCI subjects with low Ab_42 and high total tau in cerebrospinal fluid (CSF), which is considered a biomarker for AD.

Ethological approach to autism spectrum disorders.

The purpose of the study was to develop a new ethogram for the assessment of children and adolescents with autism spectrum disorders (ASD) and intellectual developmental disorder (IDD) and to test whether this instrument accurately distinguishes ASD participants (n = 61) from IDD participants (n = 61). An ethogram with 88 behavior elements was generated, including body postures, verbalizations, facial expressions, motor stereotypies, head postures, gaze behavior, gestures, and interpersonal distance. Significant differences were detected between both groups in classic ASD behaviors; in behaviors that are deficient in ASD according to established theoretical models, such as symbolic play, gaze direction, gaze following, and use of mental state language; in atypical behaviors that have also been described previously in ethological studies with ASD; and in the nonspecific behaviors of ASD, such as walk, look own body, explore, and cry.

Effects of coronal substrates and water storage on the microhardness of a resin cement used for luting ceramic crowns.

Unlabelled: Composite resin and metallic posts are the materials most employed for reconstruction of teeth presenting partial or total destruction of crowns. Resin-based cements have been widely used for cementation of ceramic crowns. The success of cementation depends on the achievement of adequate cement curing.

Evaluation of UCLA implant-abutment sealing.

Purpose: To evaluate the effect of the presence of a prefabricated cobalt-chromium (CoCr) margin in a universal castable long abutment (UCLA) on the sealing capability and fit of the implant-abutment interface.

Materials And Methods: One-hundred twenty external hexagon implants (SIN) were divided into two groups (n=60 each) to receive UCLA abutments from six manufacturers (n=10 each) either with or without a CoCr margin (n=60 each). Abutments were cast and 12 groups were formed: M (Microplant), I (Impladen), S (SIN), Sv (Signo Vinces), T (TitaniumFix), and B (Bionnovation).

Resolution of complex esthetic problems in abnormal anterior teeth: a clinical report.

A conservative treatment is presented for a patient with complex severe esthetic problems related to the presence of anomalous teeth. The patient showed a rare occurrence of macrodontia of the maxillary right lateral incisor and microdontia of the maxillary left lateral incisor. The treatment plan was conservative to avoid tooth extraction, periodontal tissue trauma, and the risk of an unpredictable esthetic outcome.

Cognitive and behavioral heterogeneity in genetic syndromes.

Objective: this study aimed to investigate the cognitive and behavioral profiles, as well as the psychiatric symptoms and disorders in children with three different genetic syndromes with similar sociocultural and socioeconomic backgrounds.

Methods: thirty-four children aged 6 to 16 years, with Williams-Beuren syndrome (n=10), Prader-Willi syndrome (n=11), and Fragile X syndrome (n=13) from the outpatient clinics of Child Psychiatry and Medical Genetics Department were cognitively assessed through the Wechsler Intelligence Scale for Children (WISC-III). Afterwards, a full-scale intelligence quotient (IQ), verbal IQ, performance IQ, standard subtest scores, as well as frequency of psychiatric symptoms and disorders were compared among the three syndromes.

Effects of curing protocol and storage time on the micro-hardness of resin cements used to lute fiber-reinforced resin posts.

Objectives: To determine the micro-hardness profile of two dual cure resin cements (RelyX-U100, 3M-eSPe and Panavia F 2.0, Kuraray) used for cementing fiberre inforced resin posts (Fibrekor-Jeneric Pentron) under three different curing protocols and two water storage times.

Material And Methods: Sixty 16 mm long bovine incisor roots were endodontically treated and prepared for cementation of the Fibrekor posts.

Interdental papillary house: a new concept and guide for clinicians.

Surgical and nonsurgical techniques have been proposed to regenerate interdental papillae. The results are influenced by the morphology of the interdental space, which is the housing for the papilla. The concept of the interdental papillary "house" has been established not only to allow diagnosis of the causes of papillary loss, but also to manage and predict reconstruction of the interdental gingival tissue.

A multidisciplinary approach for the management of hypodontia: case report.

Hypodontia is the congenital absence of one or more teeth and may affect permanent teeth. Several options are indicated to treat hypodontia, including the maintenance of primary teeth or space redistribution for restorative treatment with partial adhesive bridges, tooth transplantation, and implants. However, a multidisciplinary approach is the most important requirement for the ideal treatment of hypodontia.

Effect of experimental chewing on masticatory muscle pain onset.

Objectives: To evaluate the effect of a chewing exercise on pain intensity and pressure-pain threshold in patients with myofascial pain.

Methods: Twenty-nine consecutive women diagnosed with myofascial pain (MFP) according to the Research Diagnostic Criteria comprised the experimental group and 15 healthy age-matched female were used as controls. Subjects were asked to chew a gum stick for 9 min and to stay at rest for another 9 min afterwards.

Speech in different oral prosthetic rehabilitation modalities for elderly individuals.

Background: speech production in different modalities of oral prosthetic rehabilitation.

Aim: to study the speech production of subjects submitted to different oral rehabilitation modalities.

Method: 36 elderly individuals (average = 68 years) of both gender were evaluated.

A comparison of the dental health of Brazilian and Canadian independently living elderly.

Objective: To compare the dental status of Brazilian and Canadian elderly populations with respect to socioeconomic and quality of life factors.

Materials And Methods: A total of 496 adults aged 60-75 years, having four or more teeth, and physically and cognitively suitable for a clinical oral examination were included. Subjects answered questions concerning their lifestyle and completed the Geriatric Oral Health Assessment Index (GOHAI) questionnaire.

Reliability and failure modes of implant-supported Y-TZP and MCR three-unit bridges.

Purpose: Chipping within veneering porcelain has resulted in high clinical failure rates for implant-supported zirconia (yttria-tetragonal zirconia polycrystals [Y-TZP]) bridges. This study evaluated the reliability and failure modes of mouth-motion step-stress fatigued implant-supported Y-TZP versus palladium-silver alloy (PdAg) three-unit bridges.

Materials And Methods: Implant-abutment replicas were embedded in polymethylmethacrylate resin.

Are teeth close to the cleft more susceptible to periodontal disease?

Objective: To evaluate whether teeth close to the cleft area present higher prevalence and severity of periodontal disease than teeth in other regions.

Design: Cross-sectional.

Setting: Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo.

Microhardness of resin cements in the intraradicular environment: effects of water storage and softening treament.

Objectives: To analyze the microhardness of four dual-cure resin cements used for cementing fiber-reinforced posts under the following conditions: after 7 days of storage in water, after additional 24h of immersion in 75% ethanol, and after 3 months of storage in water. Hardness measurements were taken at the cervical, middle and apical thirds along the cement line.

Methods: Root canals of 40 bovine incisors were prepared for post space.

Fracture resistance of weakened roots restored with composite resin and glass fiber post.

This study evaluated the fracture resistance of weakened roots restored with glass fiber posts, composite resin cores and complete metal crowns. Thirty maxillary canines were randomly divided into 3 groups of 10 teeth each: teeth without weakened roots (control); teeth with partially weakened roots (PWR) and teeth with and largely weakened roots (LWR). The control group was restored with glass fiber posts and a composite resin core.

Correlation between margin fit and microleakage in complete crowns cemented with three luting agents.

Unlabelled: Microleakage can be related to margin misfit. Also, traditional microleakage techniques are time-consuming. This study evaluated the existence of correlation between in vitro margin fit and a new microleakage technique for complete crowns cemented with 3 different luting agents.

In vitro wear resistance of three types of polymethyl methacrylate denture teeth.

The wear resistance of denture teeth is important to the longevity of removable prostheses of edentulous patients. The ability of denture teeth to maintain a stable occlusal relationship over time may be influenced by this property. The purpose of this in vitro study was to evaluate the wear resistance of polymethyl methacrylate (PMMA) denture teeth based on their chemical composition when opposed by a ceramic antagonist.

Comparative study of ceramic-to-metal bonding.

Dentists and technicians have used dental ceramics associated with different types of alloys without taking into account the characteristics of compatibility of these materials. Knowing the properties of the alloy and ceramic used in metal/ceramic restorations is a key factor for treatment success. The purpose of this study was to evaluate the bond strength of a palladium-silver alloy (Pors-on 4) to 3 ceramics (Ceramco, Noritake and Vita VMK-68) using shear forces at the metal-ceramic interface.