OBJECTIVE: To enhance knowledge of root caries by analysis of the dynamics of @entity2413 on root surface and their relationships with the caries history. METHODS: The pH, free @entity460 and total proteins of @entity2413 on sound root surfaces were analyzed before and after the @entity969 challenge. Subjects were either @entity27759 ( @entity27759 ) or caries-positive ( @entity11663 ). RESULTS: After a @entity969 challenge, the pH of plaque fluids dropped significantly and the concentration of free @entity460 increased significantly. There were no statistical differences in pH ( @entity27759 group 6.24 +/- 0.74, @entity11663 group 5.96 +/- 0.70) and free @entity460 [ @entity27759 group (0.60 +/- 0.46) mmol/L, @entity11663 group (0.89 +/- 0.54) mmol/L] between @entity27759 and @entity11663 group before @entity969 challenge. Following @entity969 exposure, pH (5.14 +/- 0.19) and free @entity460 [(1.73 +/- 0.74) mmol/L] in @entity11663 group were significantly lower than @entity11663 group [(pH 5.28 +/- 0.16), free @entity460 (2.73 +/- 1.25) mmol/L]. No interrelationship has been found between the amount of total proteins and free @entity460 . Components (contents, change trend) in root plaque were strongly related to that in coronal plaque. CONCLUSIONS: The process of root caries may be consistent to coronal caries regarding to the acid production of bacteria after a @entity969 challenge. Plaque compositions show a stronger cariogenic potential in @entity11663 group.

[The dynamics of pH, free XXXX and total proteins in root plaque fluid and their relationships to the cariogenic potential].

@entity2413 :: ('MESH:D003773', 'Disease') :: ['dental plaque fluids'] @entity27759 :: ('MESH:D017213', 'Disease') :: ['RCF', 'root caries-free'] @entity11663 :: ('27297', 'Gene') :: ['RCP'] @entity969 :: ('MESH:D013395', 'Chemical') :: ['sucrose'] @entity460 :: ('MESH:D002118', 'Chemical') :: ['calcium']
@entity460 :: (MESH:D002118,Chemical) :: ['calcium']
