Effect of surface topography of implant abutments on retention of cemented single-tooth crowns.
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.
de Campos
Tomie Nakakuki
TN
USP, Dental School, São Paulo, SP, Brazil. tncampos@usp.br
Adachi
Lena Katekawa
LK
Miashiro
Karen
K
Yoshida
Hideki
H
Shinkai
Rosemary Sadami
RS
Neto
Pedro Tortamano
PT
Frigerio
Maria Luiza Moreira Arantes
ML
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
D003764:Dental Materials; D015036:Zinc Phosphate Cement; D014025:Titanium; D000537:Aluminum Oxide