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Molding with bonded conical transfers: A new technique

Author(s): Ramos Elimario V, Carvalho Geraldo AP, Simone Kreve*, Franco Aline BG, Perez Fabiano and Dias Sergio C

OBJECTIVE: To evaluate the dimensional accuracy of two different molding techniques for multiple prostheses on implants-molding with bonded square transfers using an open individual impression tray, and molding with bonded conical transfers using closed individual impression tray, a variation of the conventional technique.

MATERIALS AND METHODS: A master model was created to simulate the condition of missing teeth and fitted implants, using, thus, three implants out of alignment. A superstructure was used as measurement template and to measure adaptation in the specimens (25 for each molding technique). The transfers were bonded with self-polymerized acrylic resin. Molding procedures were performed using individual impression trays and addition silicone Futura regular fluid. The models were produced in plaster rock type IV Fuji-Rock. Measurements were obtained using Scan Electron Microscopy.

RESULTS: Data relative to disadaptation measurements were analyzed with Student’s t-test for independent samples. The mean disadaptation of the master model was 4.491 µm; the open impression tray molding was 9.546 µm (standard deviation 0.893); and the closed impression tray molding, 8.033 (standard deviation 0.431).

CONCLUSION: The molding technique with closed impression tray and conical transfers showed a significantly higher performance in comparison to the open impression tray technique with bonded square transfers.

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Citations : 19

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