title: Retentiveness of dental cements used with metallic implant components.
abstract: There is limited dental literature evaluating the retentive capabilities of luting agents when used between metal components, such as cast metal restorations cemented onto machined metal implant abutments. This study compared the retentive strengths of 5 different classes of luting agents used to cement cast noble metal alloy crowns to 8-degree machined titanium cementable implant abutments from the Straumann ITI Implant System. Sixty prefabricated 5.5-mm solid titanium implant abutments and implants were used; 30 received the standard surface preparation and the other 30 received an anodized surface preparation. Anodized implant components were used to reflect current implant marketing. Sixty castings were fabricated and randomly paired with an abutment and implant. A total of 12 castings were cemented onto the implant-abutment assemblies for each of the 5 different luting agents (zinc phosphate, resin composite, glass ionomer, resin-reinforced glass ionomer, and zinc oxide-non-eugenol). After cementation, the assemblies were stored in a humidor at room temperature prior to thermocycling for 24 hours. Each casting was pulled from its respective abutment, and the force at which bond failure occurred was recorded as retentive strength. A statistically significant difference was found between the 5 cements at P < or = .001. Of the cements used, resin composite demonstrated the highest mean retentive strength. Zinc phosphate and resin-reinforced glass-ionomer cements were the next most retentive, while glass ionomer and zinc oxide-non-eugenol cements demonstrated minimal retention. In addition, retention was not altered by the use of an anodized abutment surface.
authors.affiliation: Department of Prosthodontics and Operative Dentistry, University of Connecticut, School of Dental Medicine, Farmington 06030-1615, USA.
authors.forename: R S
authors.initials: RS
authors.lastname: Squier
authors.forename: J R
authors.initials: JR
authors.lastname: Agar
authors.forename: J P
authors.initials: JP
authors.lastname: Duncan
authors.forename: T D
authors.initials: TD
authors.lastname: Taylor
mesh_terms: D000268:Adhesiveness; D000704:Analysis of Variance; D020099:Coated Materials, Biocompatible; D003442:Crowns; D000044:Dental Abutments; D003722:Dental Alloys; D001840:Dental Bonding; D003735:Dental Casting Technique; D003738:Dental Cements; D015921:Dental Implants; D017268:Dental Prosthesis Retention / Q000379:methods*; D005899:Glass Ionomer Cements; D008422:Materials Testing; D010710:Phosphates; D011897:Random Allocation; D019279:Resin Cements; D018709:Statistics, Nonparametric; D013499:Surface Properties; D015034:Zinc Oxide; D015036:Zinc Phosphate Cement
chemical_list: D020099:Coated Materials, Biocompatible; D003722:Dental Alloys; D003738:Dental Cements; D015921:Dental Implants; C061504:Flecks; C113301:FujiPlus; D005899:Glass Ionomer Cements; D010710:Phosphates; D019279:Resin Cements; C449162:zinc oxide-non-eugenol cement; C084541:Fuji glass-ionomer lining cement; D015036:Zinc Phosphate Cement; C052304:Panavia EX; D015034:Zinc Oxide