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Biomedical subjects

E H Greener

Publications and source records attributed to E H Greener.

138 records · Page 8Linked to original sources
PubMedDate not supplied

In vivo and in vitro corrosion products of dental amalgam.

Corrosion products of amalgam produced in Ringer's solution were compared with products formed in vivo using scanning electron microscopy, X-ray microanalysis, and potentiostatic anodic polarization. The corrosion products in an old amalgam were probably a mixture of tin-oxide and tin oxychloride. In vitro corrosion of fresh amalgam resulted in the buildup of similar products.

Adult↗
PubMedDate not supplied

Adhesion of orthodontic cements to human enamel.

The tensile bonding characteristics of five orthodontic cements to etched human enamel with and without a silane primer after storage for 1, 7, and 30 days in artificial saliva at 37 C were compared. The scatter of the data was probably due to the wide variation of surface morphology of etched human enamel. Cement L, a composite resin cement, was significantly stronger than the other cements tested. Cement D, a polycarboxylate cement, was significantly the weakest cement tested. Cements U, O, and N-B were of relatively equal bond strengths. Of the direct-bonding systems commercially available, the N-B system had the fastest setting time. The silane primer used in the research decreased the bond strength of cement O; however, it significantly increased the bond strength of cement L. Storage in artificial saliva at 37 C for 30 days decreased the mean bond strengths of most of the orthodontic cements with and without a silane primer. The exceptions were cement N-B without a silane primer and cements O and D with silane primer.

Composite Resins↗
PubMedDate not supplied

Solubility and water absorption of orthodontic cements.

Solubility and water absorption of eight orthodontic cements were determined as a function of time. Two brands of BIS-GMA and three brands of acrylic cements ranked about equally in solubility and water absorption. Three brands of polycarboxylate cements were appreciably poorer in these properties.

Absorption↗