Impact of low-fusion gutta-percha cones used in variations of the continuous wave condensation technique with filling sealers based on bioceramic compounds on the quality of root canal filling.

Autor: da Costa RP; Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n., Ribeirão Preto, SP, 14020-904, Brazil., Alves Dos Santos GN; Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n., Ribeirão Preto, SP, 14020-904, Brazil., Petean IBF; Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n., Ribeirão Preto, SP, 14020-904, Brazil., Silva-Sousa AC; Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n., Ribeirão Preto, SP, 14020-904, Brazil., Camargo RV; Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n., Ribeirão Preto, SP, 14020-904, Brazil., Lopes-Olhê FC; Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n., Ribeirão Preto, SP, 14020-904, Brazil., Silva-Sousa YTC; Faculty of Dentistry, University of Ribeirão Preto (UNAERP), Ribeirão Preto, SP, Brazil., Mazzi-Chaves JF; Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n., Ribeirão Preto, SP, 14020-904, Brazil., Sousa-Neto MD; Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n., Ribeirão Preto, SP, 14020-904, Brazil. sousanet@forp.usp.br.
Jazyk: angličtina
Zdroj: Odontology [Odontology] 2024 Oct; Vol. 112 (4), pp. 1167-1177. Date of Electronic Publication: 2024 Mar 21.
DOI: 10.1007/s10266-024-00924-2
Abstrakt: To evaluate the impact on the quality of filling with of low-fusion and conventional gutta-percha cones. Thirty-six maxillary canines were prepared and divided into three groups: I-conventional cone with Downpack at 200 °C at 4 mm from the WL; II-low-fusion cone with Downpack at 100 °C up to 4 mm from the WL; III-low-fusion cone with Downpack at 100 °C up to 7 mm from the WL. Temperature variations were measured in thirds on the external surface of the root. The bond strength was evaluated using the push-out test. The adhesive interface was analyzed by scanning electron microscopy. The bond strength and the temperature variation data were analyzed using analysis of variance and the failure type using the chi-square test. The low-fusion cone group with 7 mm Downpack showed higher bond strength (4.2 ± 2.7) compared with conventional cones (2.8 ± 1.6) and low-fusion cones with 4 mm Downpack (2.9 ± 1.6) (p < 0.05), with occurrence of a higher number of adhesive failures to the filling material and mixed failures. Relative to temperature variation, there was less temperature change in the apical third, in the low-fusion cone with Downpack 7 mm (1.0 ± 1.0) (p < 0.05). The use of low-fusion cones allowed the continuous wave condensation technique to be performed at a lower depth of Downpack at 100 °C at 7 mm, with less heating in the apical third, without compromising the quality of filling. Using gutta-percha cones with low fusion, which permits a lower condensation temperature and reduced Downpack depth, maintains the quality of filling, in order to minimize possible damage to the periapical tissues.
(© 2024. The Author(s), under exclusive licence to The Society of The Nippon Dental University.)
Databáze: MEDLINE
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