Effects of pre- or post-application of calcium chloride on occluding ability of potassium oxalate for the treatment of dentin hypersensitivity.
OBJECTIVE
To evaluate whether calcium ion supply using 1-6 mol/L CaCl2 solution could enhance the occluding ability of dentin tubules with 30% potassium oxalate treatment.


METHODS
Calcium chloride solution (1-6 mol/L) was applied to dentin disks before or after application of 30% potassium oxalate solution. Occluding ability after potassium oxalate treatment was evaluated with scanning electron microscopic (SEM) observation and measurement of dentin permeability. In addition, the composition of the precipitate formed when mixing potassium oxalate and calcium chloride was analyzed with a powder x-ray diffractometer (XRD).


RESULTS
SEM observations revealed that the dentin tubules were occluded homogeneously and completely with the precipitate when calcium chloride solution was applied before or after potassium oxalate treatment. However, the depth of the precipitate in dentin tubules from the dentin surface became shallower when pre-treated with calcium chloride before potassium oxalate. Although dentin permeability was greatly reduced in both groups, no significant difference could be observed between samples with and without calcium chloride application.
Suge
Toshiyuki
T
Department of Conservative Dentistry, Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15 Kuramoto, Tokushima, 770-8504, Japan. suge@dent.tokushima-u.ac.jp
Kawasaki
Akiko
A
Ishikawa
Kunio
K
Matsuo
Takashi
T
Ebisu
Shigeyuki
S
D000328:Adult; D002122:Calcium Chloride / Q000008:administration & dosage / Q000032:analysis / Q000627:therapeutic use*; D011232:Chemical Precipitation; D003804:Dentin / Q000187:drug effects / Q000648:ultrastructure; D003806:Dentin Permeability / Q000187:drug effects; D003807:Dentin Sensitivity / Q000188:drug therapy* / Q000473:pathology; D004357:Drug Synergism; D006801:Humans; D008855:Microscopy, Electron, Scanning; D010070:Oxalates / Q000032:analysis / Q000627:therapeutic use*; D014961:X-Ray Diffraction
D010070:Oxalates; D002122:Calcium Chloride