Words similar to sulci
Example sentences for: sulci
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Streptococcus mutans in which DCP is inactive do not initiate growth at below pH 6.5 and make glycerol LTA without D-alanine [ 14 ] . In the DCP active strains, soluble D-Alanyl LTA is extruded into culture fluid in vitro [ 16 17 ] or plaque in vivo [ 18 ] . The D-alanyl esters are stable at pH 6.0 at 37°C, but hydrolyze to free D-alanine and LTA with a half-life of 3.9 h at pH 8.0 [ 19 ] . Healthy gingival sulci have a pH of 6.5 - 7.5 and inflamed sulci a pH of 7.5-8.
An increase in pocket depth is caused by periodontopathic bacteria that associate with an alkaline environment in the sulci over many years [ 20 ] and a microbiota that is neither acidic nor acid-tolerant [ 10 ] . The coefficient of DMFT association with PD in low responders therefore differed significantly from high responders within whom F score and gingival health were stronger covariates.
About 30% of young adults have serum IgG antibodies that precipitate with D-alanyl LTA, but not with D-alanine-free LTA [ 17 21 ] . It is likely that plaques induce these IgG antibodies from gingival sulci that contain more acid-tolerant bacteria.