Abstract
BACKGROUND:
The
aim of the present study was to compare the efficacy of Nd:YAG laser
and K3 rotary system in the non-surgical root canal retreatment.
METHODS:
Sixty-one
rooted human teeth were divided into two groups of 30 after root canal
therapy. In groups 1 and 2 root canal retreatments were carried out
using K3 rotary system and Nd:YAG laser, respectively. CBCT images were
used to evaluate canal transportation and root canal debridement at
coronal, middle and apical canal cross-sections. In addition, the time
necessary for canal debridement and the temperature on the external root
surface were calculated. Mann-Whitney U test was used for statistical
analysis of data with SPSS 17 after means ± SD were calculated.
Shapiro-Wilk test was used to evaluate normal distribution of data.
Statistical significance was defined at P<0 .05.="" p="">
RESULTS:
The
mean time necessary for the debridement of root canals in the laser
group was significantly shorter than that in the K3 group (P=0.001).
However, there were no significant differences in external root surface
temperatures between the two groups (P=0.17). The coronal third of the
canals was cleaner in the laser group significantly (p=0.01). Less canal
transportation was seen in the laser group compared to the K3 group,
significantly (P=0.04).
CONCLUSIONS:
Nd:YAG
is superior to K3 rotary system in the non-surgical root canal
retreatment because it is faster and results in less canal
transportation in the middle and apical thirds of the canals.
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