Resumo

VANDRE TAUMATURGO DE, Mesquita; RODRIGUES, Rodrigo Araújo; BATISTA, André Ulisses Dantas  e  DIAS, Alexandre Henrique de Moura. Accuracy's Evaluation of Impression Techniques in Fixed. Odontol. Clín.-Cient. (Online) [online]. 2012, vol.11, n.2, pp. 145-150. ISSN 1677-3888.

The impression is one of the most important clinical procedure in prosthetic dentistry, because it transfer the bucal informations of the pacient to a model cast that will go to prosthetic department to do the reabilitation one. This study purpose was to valuate four impression techniques: 1-one step technique, 2- two step with 1 mm relief, 3- two step with 2 mm relief and two step with a polyethylene spacer, using Zetaplus Oranwash (Zermack). A stainless cast was built with two cylinder like crown of dental prepares. Five mensures were done: Distance between the center of the cylinders, diameter of cylinder 1, diameter of cylinder 2, height of cylinder 1, height of cylinder 2. Were done three mensures for the stainless cast to get a medium one. The mensures were: 2,332 cm, 0,980 cm, 0,768 cm, 0,957 cm and 0,967 cm, respectively. Were done five impressions for each group, about twenty at the total. These master model were mensured in a microscope Askania-Variant, MZM1 with a camera that gets information to a Image Pro Plus program, wich was mensured 24 hours later then the model cast were built. The result gave that the distance between all the mensures don't have difference between the groups with 5 % of ANOVA. The conclusion of this study is: The four impression techniques can be used for prosthetic dentistry.

Palavras-chave : Modelos; anatômic Denture; Partial; Fixed; Dental Prosthesis; Prosthetic dentistry and Techniques.