Abstract
OBJECTIVE:
The
aim of the present study was to determine how long the effects of laser
and cyanoacrylate last when used as treatments for dentine
hypersensitivity (DH). In addition, the predictive factors of DH
recurrence and the prevalence of DH according to type of tooth were
investigated.
MATERIALS AND METHODS:
Sixty-two patients
contributed with 434 sensitive teeth. Two hundred sixteen teeth were
randomized to receive laser treatment (wavelength of 795 nm) and 218
received cyanoacrylate treatment. Both treatments were applied three
times at intervals of 48 hours. Dentine hypersensitivity was assessed by
air stimulus at baseline and 1, 30, 90 and 180 days after treatment by a
blinded researcher. Additionally, possible etiologic factors were
assessed. The data were analyzed by Kaplan-Meier survival curves and by
logistic regression.
RESULTS:
Both groups had signifi
cant reductions in DH. Treatment failure occurred in 276 (63.6%) treated
teeth and 158 (36.4%) teeth maintained the result of the treatment
until the end of the study (censored teeth). The survival rate at 6
months was 36% for laser treatment, and 36% for cyanoacrylate. There was
no signifi cant difference between the survival curves (p = 0.703).
Gingival recession and abfraction increased the risk of treatment
failure by 2.04 (p = 0.002) and 2.76 (p less than 0.001) times,
respectively.
CONCLUSIONS:
Overall, these two approaches
to DH treatment had a survival rate of 36%at 6 months. The most
prevalent hypersensitive tooth is the first premolar. Gingival recession
and abfraction predict the recurrence of DH irrespective of patient age
and sex.
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