Sealing ability of different versions of GuttaFlow2 in comparison to GuttaFlow and AH Plus

Resumo

GuttaFlow2 is a further development
of the silicone sealer GuttaFlow, exhibiting a stiffer consistency. This
is intended to overcome possible problems regarding retention of the
apical part of the root canal filling when preparing for a fiber post.
GuttaFlow2 is delivered within a capsule, like GuttaFlow, or within an
automix syringe. This study compared apical dye leakage of GuttaFlow2
in comparison to GuttaFlow and AH Plus. The null hypothesis tested
was that different sealers exhibited similar microleakage. Material
and methods: Seventy extracted human lower premolars with fully
mature apices were root canal prepared to 45/.04 and divided into
seven groups: group 1: AH Plus sealer, group 2: “normal” setting
GuttaFlow, group 3: “fast” setting GuttaFlow, group 4: GuttaFlow2
within a capsule, group 5: GuttaFlow2 within an automix syringe,
group 6: positive control, group 7: negative control (n = 10 each).
Root canals were filled with sealer (except group 7) and a master
gutta-percha cone size 40/.04 using the non-compaction technique.
A dye penetration test was carried out by centrifugation for 3 min
at 30 G within 5 % methylene blue dye. Linear dye penetration was
recorded. Statistical evaluation was carried out with IBM SPSS 19.0
(α = 0.05). Results: The positive control was significantly different
from all other groups (ANOVA, p < 0.001; Student-Newman-Keuls
post-hoc test p < 0.05). When the control groups were disregarded,
no significant differences were apparent. Groups 1 to 5 showed low
leakage values when compared with results of earlier studies using
a similar methodology. Conclusion: All sealers tested exhibited low
dye leakage values.