Compressive and diametral tensile strengths of current adhesive luting agents.
Strength parameters greatly influence the selection of luting agents. This study compared the compressive and diametral tensile strengths of six classes of new adhesive luting agents (ALAs) with zinc phosphate as the controls. The 11 materials tested were prepared according to the manufacturers' instructions for use as luting agents. Mean compressive and diametral strengths and standard errors were calculated for each luting agent (n = 10). Analysis of variance was computed (p < 0.0011) and multiple comparisons tests were performed. Compressive strengths varied from 41.5 MPa for a hydroxyapatite ALA to 178.5 MPa for a composite resin ALA. Diametral tensile strengths ranged from 8.1 MPa for a hydroxyapatite ALA to 45.1 MPa for a composite resin ALA. Conventional powder-liquid glass ionomer ALAs, an encapsulated glass ionomer ALA, a composite resin-glass ionomer hybrid ALA, and the composite resin ALAs demonstrated significantly greater compressive and diametral strengths than the zinc phosphate cements.
Department of Restorative Dentistry, University of Southern California, School of Dentistry, Los Angeles.
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D000704:Analysis of Variance; D003188:Composite Resins; D003738:Dental Cements / Q000737:chemistry*; D003799:Dental Stress Analysis; D017886:Durapatite; D005899:Glass Ionomer Cements; D006882:Hydroxyapatites; D008422:Materials Testing; D011076:Polycarboxylate Cement; D012117:Resins, Synthetic; D013718:Tensile Strength; D015036:Zinc Phosphate Cement
D003188:Composite Resins; D003738:Dental Cements; D005899:Glass Ionomer Cements; D006882:Hydroxyapatites; D011076:Polycarboxylate Cement; D012117:Resins, Synthetic; D015036:Zinc Phosphate Cement; D017886:Durapatite