Amalgam buildups: shear strength and dentin sealing properties.

E. L. Pashley, R. W. Comer, E. E. Parry, David Henry Pashley

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


The retentive strength and sealing properties of amalgam buildups were compared in vitro in three groups of specimens. All teeth were prepared with flat, nonretentive surfaces. In the first group, the amalgam buildups were retained by four self-threading Minim pins. In the second group, retention was provided by a circumferential slot prepared in the dentin just inside the DEJ. The third group utilized an adhesive resin for retention. Dentin permeability was measured as a hydraulic conductance before and after placement of the amalgam buildups and before and after thermocycling. All methods of retention sealed dentin very well even in the absence of cavity varnish. The 90 degree retentive strength was: pins, 10.3 +/- 0.9 MPa; slots, 4.1 +/- 0.5 MPa; resin, 3.1 +/- 0.8 MPa (mean +/- SEM).

Original languageEnglish (US)
Pages (from-to)82-89
Number of pages8
JournalOperative dentistry
Issue number3
StatePublished - May 1 1991

ASJC Scopus subject areas

  • General Dentistry


Dive into the research topics of 'Amalgam buildups: shear strength and dentin sealing properties.'. Together they form a unique fingerprint.

Cite this