title: Effect of surface topography of implant abutments on retention of cemented single-tooth crowns.
abstract: This study investigated whether surface topography affects the retentive strength of cemented full crowns, comparing the effects of standard machined, sandblasted, and grooved implant abutments. Five metallic crowns per abutment type were cast and cemented with zinc phosphate. After 24 hours, the specimens were submitted to a tensile test. The retentive strength of the cemented crowns was affected by abutment surface topography. The sandblasted and grooved surface groups had approximately 2.4 times greater mean uniaxial retentive strength than the machined surface group (P < .001). The retentive strength of the sandblasted and grooved abutments was similar, despite marked differences in surface profiles and roughness parameters.
authors.affiliation: USP, Dental School, São Paulo, SP, Brazil. tncampos@usp.br
authors.forename: Tomie Nakakuki
authors.initials: TN
authors.lastname: de Campos
authors.forename: Lena Katekawa
authors.initials: LK
authors.lastname: Adachi
authors.forename: Karen
authors.initials: K
authors.lastname: Miashiro
authors.forename: Hideki
authors.initials: H
authors.lastname: Yoshida
authors.forename: Rosemary Sadami
authors.initials: RS
authors.lastname: Shinkai
authors.forename: Pedro Tortamano
authors.initials: PT
authors.lastname: Neto
authors.forename: Maria Luiza Moreira Arantes
authors.initials: ML
authors.lastname: Frigerio
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D002484:Cementation / Q000379:methods*; D003442:Crowns; D000044:Dental Abutments; D045662:Dental Etching / Q000379:methods; D019250:Dental Implants, Single-Tooth; D003764:Dental Materials / Q000737:chemistry; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention; D003799:Dental Stress Analysis / Q000295:instrumentation; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013718:Tensile Strength; D013997:Time Factors; D014025:Titanium / Q000737:chemistry; D015036:Zinc Phosphate Cement / Q000737:chemistry
chemical_list: D003764:Dental Materials; D015036:Zinc Phosphate Cement; D014025:Titanium; D000537:Aluminum Oxide