External root temperature and Its relationship with dentin thickness during gutta-percha removal procedures with ultrasound
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Introduction: This study aims to evaluate the temperature rise on the external root
surface during gutta-percha removal with 2 types of ultrasonic tips, and its relationship
with the root dentin thickness. Methods: A total of 56 single-rooted teeth were prepared
for gutta-percha removal procedures, conducted for 40 seconds using 2 types of ultrasonic
tips at depths of 6 mmand 11 mm. The temperature generated was measured using
a type K thermocouple at 3 measurement points. NonparametricWilcoxon test was used,
and the correlation between thickness and temperature rise was evaluated with
Spearman correlation test. Results: The temperature rise occurred in all groups,
reaching maximum values of 21.0 C (mean 5 14.6) with Clearsonic and 11.3 C
(mean 5 4.2) in the Clearsonic Black group, recorded at a 1-mm depth at 40 seconds
(P , .05). At 20 seconds, the Clearsonic produced an increase ranging from 10.5 C and
12.9 C in 25% of teeth. No significant differences were observed between the 2 types of
ultrasonic tips at an 11-mm depth, across all time intervals and measurement points.
Spearman’s coefficient showed significant correlations with Clearsonic use at 20
seconds. Significant correlations with Clearsonic Black were observed at 20 and
40 seconds at point T1. Conclusions: The Clearsonic Black generates a smaller
temperature increase at a depth of 6mmcompared to the Clearsonic andwithin a time not
exceeding 20 seconds (P , .05). There is a partial correlation between temperature
increase and dentin thickness.
Como referenciar
SALAZAR-SILVA, JUAN R.; PASCHOAL, CARLOS E.; SILVA, DANIELA de F.T.; ZEZELL, DENISE M.; D'ASSUNÇAO, FABIO L.C.; CALDEIRA, CELSO L. External root temperature and Its relationship with dentin thickness during gutta-percha removal procedures with ultrasound: an ex vivo study. Journal of Endodontics, v. 51, n. 3, p. 340-347, 2025. DOI: 10.1016/ j.joen.2024.12.007. Disponível em: https://repositorio.ipen.br/handle/123456789/49864. Acesso em: 30 Jun 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.