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Volume 30 , Issue 4
July/August 2010

Pages 409-413

Effect of Surface Topography of Implant Abutments on Retention of Cemented Single-Tooth Crowns

Tomie Nakakuki de Campos, DDS, PhD/Lena Katekawa Adachi, DDS, PhD/Karen Miashiro, DDS/ Hideki Yoshida, DDS, PhD/Rosemary Sadami Shinkai, DDS, PhD/Pedro Tortamano Neto, DDS, PhD/Maria Luiza Moreira Arantes Frigerio, DDS, PhD

PMID: 20664843
DOI: 10.11607/prd.00.0927

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. (Int J Periodontics Restorative Dent 2010;30:409413.)

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