title: Evaluation of fit of cement-retained implant-supported 3-unit structures fabricated with direct metal laser sintering and vacuum casting techniques.
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.
authors.affiliation: Department of Buccofacial Prostheses, Faculty of Odontology, Complutense University of Madrid (UCM), Madrid, Spain. raquel.castillo@odon.ucm.es
authors.forename: Raquel Castillo
authors.initials: RC
authors.lastname: Oyagüe
authors.forename: Andrés
authors.initials: A
authors.lastname: Sánchez-Turrión
authors.forename: José Francisco
authors.initials: JF
authors.lastname: López-Lozano
authors.forename: Javier
authors.initials: J
authors.lastname: Montero
authors.forename: Alberto
authors.initials: A
authors.lastname: Albaladejo
authors.forename: María Jesús
authors.initials: MJ
authors.lastname: Suárez-García
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000497:Alloys / Q000737:chemistry; D002484:Cementation / Q000379:methods*; D002858:Chromium Alloys / Q000737:chemistry; D003735:Dental Casting Technique; D059605:Dental Implant-Abutment Design; D015921:Dental Implants; D018772:Dental Marginal Adaptation; D003764:Dental Materials / Q000737:chemistry; D019094:Dental Prosthesis, Implant-Supported; D012994:Dental Soldering / Q000379:methods*; D003779:Denture Design; D003781:Denture Retention; D003830:Denture, Partial, Fixed; D005899:Glass Ionomer Cements / Q000737:chemistry; D006047:Gold Alloys / Q000737:chemistry; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D007834:Lasers; D008689:Methacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D010165:Palladium / Q000737:chemistry; D011140:Polyurethanes / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry; D014618:Vacuum
chemical_list: D000180:Acrylic Resins; D000497:Alloys; D002858:Chromium Alloys; D015921:Dental Implants; D003764:Dental Materials; D005899:Glass Ionomer Cements; D006047:Gold Alloys; D008689:Methacrylates; D011140:Polyurethanes; D019279:Resin Cements; C029824:urethane dimethacrylate luting resin; C013616:nitinol; D010165:Palladium; D014025:Titanium
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