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The purpose of this work was to evaluate cephalometric changes concerned to Bimler appliance therapy. Such changes were evaluated through the analysis of the following cephalometric factors: 1. Facial axis; 2. Mean corpus length; 3. Depth of Pogonion; 4. Depth of poit "A"; 5. Upper incisor inclination; 6. Lower incisor inclination; 7. Stetic plane.

This study aims to demonstrate the effect of dental explorer on demineralized enamel. Bovine teeth were divided perpedinculary towards their long axis. Each section were provided with 2 grooves, parallels to the teeth's axis. These sections were exposed to an acid solution for 7 days. After this period just one of the grooves of each section was probed ahd then, the demineralization was continued for one more wee. Then we could compare the lesions depths of demineralization of the probed grooves and the non probed grooves. The probed grooves presented an increased lost of enamel structure, more than the non probed grooves. It was concluded that the careless use of dental explorer on diagnosis of fissures caries cause mechanical damage to enamel already softened as a result of a carious attack.

Dental enamel cavity walls of bovine extracted incisors were submitted to different treatments before to be "restored" with amalgam. The Group A non received treatment; the Group B received only a conventional cavity varnish and the Group C received a solution of sodium fluoride (2%) + conventional cavity varnish (2 applications). After 7 days of immersion in gel acid, the ground sections were studied in polarized microscope. The Group C that received sodium fluoride + conventional cavity varnish presented more resistance to demineralization. The Group B that received only cavity varnish presented a reduction in resistance to demineralization, and the Group A that non received treatment presented minor resistance to demineralization. Therefore, is emphasized the importance of application of sodium fluoride in cavity walls before lining with conventional cavity varnish and restoring with amalgam to obtain more resistance to demineralization.

A study was developed to compare the marginal leakage by basic fuchsin dye, around cervical restorations after applying composite resin + dentin adhesive and composite resin + glass ionomer cement. Cervical cavities were prepared on the lingual and vestibular surfaces in 19 freshly extracted human teeth. The lingual cavities were restored with composite resin + dentin adhesive, and the vestibular cavities were restored with composite resin + glass ionomer cement ("Sandwich's" technique). After placement of each restoration, these teeth were thermocycled, immersed in dye solution. After removal from the dye, the teeth were sectioned through the restorations, along the long axis of the crown, and analyzed the leakage's degree. The composite resin + glass ionomer cement restorations, showed marginal leakage between the restorative material and the cervical margin but, generally since the middle of this wall.

The authors present a review of diagnosis methods of approximal carious lesions and emphasises the necessity, in cases of incipient carious lesions, of using dental temporary separation to provide an inequivocal diagnosis. The temporary tooth separation offers preservation of dental structure and permits application of preventive and restorative procedures and monitoring incipient carious lesions. Selected methods of temporary dental separation are presented.

The presentation of this case report shows the dentoalveolar and soft tissue alterations produced by Orthodontic treatment. Mechanic sequence included sectional arches and were planned according to the Bioprogressive Therapy. The cephalometric assessment (Ricketts analysis and superimpositions) demonstrates all changes produced by treatment as well as those influenced by growth.

The use of fluoride dentifrices in Curitiba (Brazil) was studied. The scholarity and socio-economical levels of the population were related to the use of fluoride dentifrices. The sample was composed of 155 persons, men and women. The results showed that 96.8% used dentifrices, but only 36.2% used fluoride dentifrices. The use of fluoride dentifrices was more significant among the higher socioeconomical and school levels.