In vitro changes in hardness of sealed resilient lining materials on immersion in various fluids.

Purpose: During clinical use, resilient lining materials undergo changes in hardness that make them ineffective. The aims of this investigation were (1) to determine the effect of a resilient lining sealer on the hardness of four resilient denture liners; and (2) to determine the effect of the sealer on hardness after immersion in various solutions.

Materials And Methods: Two sets of specimens of four resilient liners, Coe-comfort (CC), PermaSoft (PS), Tokuyama soft reline (TK), and Total-Soft (TS), 6-mm diameter by 4-mm thickness, were fabricated.

Oxidation of titanium, RGD peptide attachment, and matrix mineralization rat bone marrow stromal cells.

The aim of this study was to compare the efficacy of attachment of arginine-glycine-aspartic acid (RGD) peptide to titanium surfaces oxidized by different methods. Titanium surfaces were treated as follows: (1) treatment A: passivation in nitric acid, (2) treatment B: heated in air at 400 degrees C for 1 hour, (3) treatment C: immersed in 8.8 M H2O2/0.

Attachment of human marrow stromal cells to titanium surfaces.

The attachment of human bone marrow stromal cells to titanium alloy (Ti6Al4V) surfaces was investigated. Titanium disks were polished and modified by surface roughening and by passivation in nitric add. Cell attachment to titanium surfaces and tissue culture plastic (TCP) was determined by tetrazolium bromide (MTT) assay at 2, 6, 24, and 48 hours after seeding.