Evaluation of fit of cement-retained implant-supported 3-unit structures fabricated with direct metal laser sintering and vacuum casting techniques |
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Authors: | Raquel Castillo Oyagüe Andrés Sánchez-Turrión José Francisco López-Lozano Javier Montero Alberto Albaladejo María Jesús Suárez-García |
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Affiliation: | Department of Buccofacial Prostheses, Faculty of Odontology, Complutense University of Madrid (UCM), Madrid, Spain. raquel.castillo@odon.ucm.es |
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Abstract: | This study evaluated the vertical discrepancy of implant-fixed 3-unit structures. Frameworks were constructed with laser-sintered Co-Cr, and vacuum-cast Co-Cr, Ni-Cr-Ti, and Pd-Au. Samples of each alloy group were randomly luted in standard fashion using resin-modified glass-ionomer, self-adhesive, and acrylic/urethane-based cements (n = 12 each). Discrepancies were SEM analyzed. Three-way ANOVA and Student-Newman-Keuls tests were run (P < 0.05). Laser-sintered structures achieved the best fit per cement tested. Within each alloy group, resin-modified glass-ionomer and acrylic/urethane-based cements produced comparably lower discrepancies than the self-adhesive agent. The abutment position did not yield significant differences. All misfit values could be considered clinically acceptable. |
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