Claudio P. Fernandes

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OBJECTIVES The clinical usefulness, accuracy and precision of a novel bite force sensor based on force sensing resistors were tested in six subjects wearing maxillary removable partial dentures retained by conical crowns. METHODS The surfaces of the sensor were manufactured in a silicone material that had mechanical properties similar to those of tough(More)
This study investigated the effect of "plasma treatment" on the wettability of impression materials and void formation in die stone casts. Four addition reaction silicones, one condensation reaction silicone, and one polyether impression material were used. Wettability was determined before and after plasma treatment by contact angle registration of a(More)
Enamel rods are commonly accepted as perpendicularly oriented to the tooth surface and this concept has influenced the design of cavity preparations. This investigation studied the orientation and direction of enamel rods at the outer third of the enamel plate. Fifteen human molars were randomly selected and sectioned in the buccolingual, mesiodistal, and(More)
The aim of this study was to compare the electromyographic (EMG) activity of jaw-closing muscles of individuals with normal and reduced periodontal bone support. Fourteen adult subjects with more than 24 remaining teeth and low levels of periodontal inflammation, were selected for the study. Subjects of the control group had 90% of the periodontal bone(More)
This study investigated the wettability of commonly used elastomeric impression materials and their gypsum castability. The wettability was evaluated by determining the contact angles of drops of a CaSO4 aqueous solution on flat impression surfaces. Gypsum castability was determined by counting the number of voids formed in die stone casts made from(More)
OBJECTIVES This research was conducted to demonstrate the effectiveness of reflective photoelasticity as an in vivo technique for monitoring the strain/stress distribution in prosthetic devices during function. METHODS Seven subjects were selected for this study and divided into three groups according to the design of the prostheses. The buccal surfaces(More)
The aim of this study was to investigate the effect of the rehabilitation of the upper jaw with a fixed bridge supported by Brånemark implants upon patient's masticatory efficiency. Five patients wearing complete dentures in the upper jaw were selected for the study. Chewing tests using Optosil tablets were performed before fixture installation, immediately(More)
The wettability of impression materials is an important requirement for accurate reproduction of intraoral structures. The aims of this study were to evaluate the effect of plasma cleaning on critical surface tension and die stone castability of five silicone impression materials. Critical surface tension was calculated using a contact angle analysis(More)
Plasma treatment has been reported to improve the wettability of silicone impression materials. This study investigated whether plasma treatment of silicone impressions influenced the linear dimensional accuracy, detail reproducibility, and surface hardness of models produced from a type IV dental die stone. Five silicone impressions materials were used in(More)
In vehicular networks, the cooperation among nodes is required to traffic safety applications. This paper presents RS4VANETs, a decentralized reputation system that aims to guarantee the proper operation of a data dissemination application (Local Danger Warning - LDW) even in the face of malicious nodes. Experiments with traffic and network simulators were(More)