Retention of luting agents on implant abutments of different height and taper.
OBJECTIVE
The purpose of this study was to evaluate the retention of four cements used to lute metal restorations onto computer designed and manufactured titanium implant abutments of different heights and convergence angles.


METHODS
Test specimens consisted of metal coping cemented on Procera titanium abutments of 5, 7, and 9 mm of height, and of 0 degrees , 4 degrees , and 8 degrees of convergence angle. The cements used were zinc-phosphate, zinc oxide-eugenole, polyurethane resin with and without vaseline. The samples were tested in a universal testing machine. The mean uniaxial load at point of separation was determined. The results were statistically evaluated with ANOVA.


RESULTS
The luting agent, the height, and the taper influence the retention of metal casting on customized CAD-CAM implant abutments.


CONCLUSIONS
The most retentive cement was zinc-phosphate, followed by polyurethane, polyurethane plus vaseline, and zinc oxide-eugenol.
Bresciano
Mario
M
Department of Prosthodontics, University of Turin, Turin, Italy.
Schierano
Gianmario
G
Manzella
Carlo
C
Screti
Antonio
A
Bignardi
Cristina
C
Preti
Giulio
G
D000704:Analysis of Variance; D000044:Dental Abutments; D003738:Dental Cements / Q000737:chemistry*; D015921:Dental Implants; D017268:Dental Prosthesis Retention
D003738:Dental Cements; D015921:Dental Implants