Corrección vertical de reborde edéntulo y creación de papila a través de pónticos ovoides: reporte de caso clínico / Vertical ridge correction and papilla creation using ovate pontics: a clinical report

El objetivo del presente caso clínico fue corregir el defecto vertical de un reborde edentulo en el sector antero superior a través de una Matriz Dérmica Acelular (Alloderm®). El plan de tratamiento contemplo la rehabilitación a través de una Prótesis Parcial Fija. Una vez corregida la altura del reborde se confeccionaron encerados diagnósticos y provisionales para efectuar presión selectiva a los tejidos gingivales y de esta forma estimular a la formación papilar. Paralelamente se modifico el ancho mesio distal de los pónticos a fin de manejar adecuadamente el espacio edéntulo y evitar la formación de espacios por debajo del póntico que perjudicaran la estética, fonética y función del paciente.

The objective of the present clinical case was to correct the vertical defect of an edentulous ridge in the anterior-superior area by using an Acellular Dermic Matrix (AlloDerm®). The treatment was planned to make a Fixed Partial Prosthesis. Affter correcting the ridge height, diagnostic wax-up and provisionals were made, to exert selective pressure in the gingival tissues to stimulate the creation of papilla. At the same time, the pontic mesio-distal width were modified to manage correctly the edentulous space and avoid the formation of spaces under the pontic which would affect esthetics, fonetics and function of the patient.

Use of aspartate aminotransferase in diagnosing periodontal disease: a comparative study of clinical and microbiological parameters.

The objective of this study was to assess the association between the levels of enzyme aspartate aminotransferase (AST) in gingival crevicular fluid (GCF) with the BANA hydrolysis microbiological test (Perioscan) and clinical periodontal diagnostic measurements, such as bleeding on probing, plaque index, gingival index, probing depth, and attachment level in patients with chronic periodontitis using an enzymatic test (PocketWatch). One hundred and forty-seven sites were evaluated in 22 patients with a probing depth of > or = 5 mm at selected sites. AST and BANA enzymatic tests were carried out, and clinical parameters recorded. Pearson's chi-square and Fisher's exact tests were used for statistical analysis. There was no statistical correlation between AST levels and any of the analyzed parameters. The lack of any association between the factors studied does not indicate, however, that the latter cannot be used in diagnosing the actual periodontal condition of patients and/or sites. However, more research should be carried out to evaluate the true relationship between AST and periodontal disease.

Evaluation of cutting patterns produced in primary teeth by an air-abrasion system.

OBJECTIVE: The aim of this in vitro study was to assess the effect of tip diameter, nozzle distance, and application time of an air-abrasion system for cavity preparation on the enamel of primary teeth. METHOD AND MATERIALS: Forty exfoliated primary teeth were air abraded with a microabrasion machine used with a handpiece with an 80-degree-angle nozzle, 50-micron abrasive particle size, and 80-psi air pressure. The effects of 0.38- or 0.48-mm inner tip diameter, 2- or 5-mm distance from tip to tooth surface, and 15 or 30 seconds of application time on cutting efficiency were evaluated. Cutting width and depth were analyzed and measured from scanning electron micrographs. RESULTS: Statistical analysis revealed that the width of the cuts was significantly greater when the tip distance was increased. Significantly deeper cavities were produced by a tip with a 0.48-mm inner diameter. The application time did not influence the cuts. CONCLUSION: The cutting patterns found in this study suggest that precise removal of enamel in primary teeth is best accomplished when a tip with a 0.38-mm inner diameter is used at a 2-mm distance.

Os atuais métodos para diagnóstico em periodontia / Recent methods for diagnostic in periodontia

Os autores fazem uma revisão geral dos atuais métodos existentes para diagnóstico da doença periodontal, assim como a forma como são realizados, suas indicações, vantagens, desvantagens e resultados