Effect of Er:YAG laser and EDTAC on the adhesiveness to dentine of different sealers containing calcium hydroxide.
OBJECTIVE
To evaluate the effect of 15% EDTAC solution and Er:YAG laser irradiation on the adhesiveness to dentine of root canal sealers containing calcium hydroxide.


METHODS
The crowns of 60 maxillary human molars were ground until dentine was exposed. The teeth were divided into three groups of 20 teeth: group I, the dentine surface received no treatment; group II, 15% EDTAC solution was applied to the dentine; group III, the dentine received Er:YAG laser application (11 mm focal distance with perpendicular incidence to dentine surface; 4 Hz frequency; 200 mJ energy; 2.25 W potency; 62 J total energy; 1 min application time). Aluminium cylinders filled with the sealers, Sealer 26, Apexit, Sealapex and CRCS, were then applied to the treated surfaces. Adhesiveness was measured with a universal testing machine, with traction results given in MegaPascals (MPa). These results were submitted to anova tests.


RESULTS
Statistical analysis showed significant differences (P < 0.01) amongst adhesiveness values of the sealers and treatments tested. Thus, sealers could be ranked in decreasing adhesiveness values: Sealer 26, CRCS, Apexit, Sealapex. Er:YAG laser irradiation and EDTAC solution application increased adhesiveness values only for Sealer 26 and Apexit. Laser irradiation was superior to EDTAC application only for Sealer 26 adhesiveness values.


CONCLUSIONS
Er:YAG laser is as efficient as EDTAC solution in increasing adhesiveness of root canal sealers containing calcium hydroxide to human dentine.
Picoli
F
F
Ribeirão Preto Dental School, University of São Paulo, Ribeirão Preto, and Camilo Castelo Branco University and Associação Paulista dos Cirurgiões-Dentistas, São Paulo, SP, Brazil.
Brugnera-Junior
A
A
Saquy
P C
PC
Guerisoli
D M Z
DM
Pecora
J D
JD
D000268:Adhesiveness; D000538:Aluminum Silicates; D000704:Analysis of Variance; D001729:Bismuth / Q000737:chemistry; D002126:Calcium Hydroxide / Q000737:chemistry*; D002614:Chelating Agents / Q000494:pharmacology*; D001840:Dental Bonding; D003804:Dentin / Q000187:drug effects / Q000528:radiation effects / Q000648:ultrastructure*; D004492:Edetic Acid / Q000031:analogs & derivatives* / Q000494:pharmacology*; D004871:Erbium; D006801:Humans; D007834:Lasers; D008422:Materials Testing; D012387:Root Canal Filling Materials / Q000737:chemistry*; D012459:Salicylates / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D015019:Yttrium; D015034:Zinc Oxide / Q000737:chemistry
D000538:Aluminum Silicates; C074418:Apexit; D002614:Chelating Agents; D012387:Root Canal Filling Materials; D012459:Salicylates; C080620:Sealer 26; C055601:Sealapex; C075563:Calcibiotic Root Canal Sealer; D015019:Yttrium; C033443:EDTAC; D004871:Erbium; D004492:Edetic Acid; D002126:Calcium Hydroxide; D015034:Zinc Oxide; D001729:Bismuth