Antibacterial effectiveness of calcium silicate?based root canal sealer against Enterococcus faecalis biofilms in infected dentinal tubules in vitro
10.3760/cma.j.issn.1002?0098.2019.10.002
- VernacularTitle:硅酸钙基根管封闭材料对牙本质小管内粪肠球菌生物膜的影响
- Author:
Tianfeng DU
1
;
Laidi WU
;
Xuezhi TANG
;
Qi SHI
;
Kang GAN
;
Juanfang ZHU
;
Yingguang CAO
Author Information
1. 郑州大学第一附属医院口腔种植修复科450052
- Keywords:
Enterococcus faecalis;
Biofilms;
Sodium hypochlorite;
Calcium silicate?based root canal sealer
- From:
Chinese Journal of Stomatology
2019;54(10):656-661
- CountryChina
- Language:Chinese
-
Abstract:
To evaluate the antiseptic effect of combined using of 5% sodium hypochlorite and calcium silicate?based root canal sealer against Enterococcus faecalis (Ef) biofilms in infected dentinal tubules in vitro . Methods Cells of Ef were inoculated into the dentinal tubules of single?rooted teeth (without caries, periapical lesions and malformations extracted due to periodontal disease or orthodontic reasons; collected from Department of Maxillofacial Surgery, The First Affiliated Hospital of Zhengzhou University) with centrifugation and incubated in brain?heart infusion (BHI) to form 3?week?old biofilms. The infected samples were subjected to sodium hypochlorite or sterile water bathing for 10 minutes followed by calcium silicate?based root canal sealer (iRoot SP) (calcium silicate?based group), Gutta?percha group and sterile water group placed on the root canal wall for 1, 4 and 12 weeks. There were two samples in each treatment at each point. The antiseptic effectiveness of combined use of sodium hypochlorite and calcium silicate?based root canal sealer was analyzed by laser scanning confocal microscope (LSCM), ANOVA and LSD?t test. Results After treatment with 5% sodium hypochlorite,in calcium silicate?based group for 4 and 12 weeks more Ef biofilm cells [(75.3 ± 3.5)% and (74.8 ± 3.8)% ] were killed than in Gutta?percha group [(65.9±4.1)% and (63.0±3.7)%] and sterile water group [(63.9±4.0)% and (64.2±3.5)%] (P<0.05). After being treated with sterile water, the proportion of dead bacterial cells in calcium silicate?based group for 1, 4 and 12 weeks [(27.5±4.6)%, (43.0±4.4)% and (40.3±6.1)%] were more than those in Gutta?percha group and sterile water group (P<0.05). After being treated with 5% sodium hypochlorite or sterile water, more biofilm bacteria were killed in calcium silicate?based group for 4 and 12 weeks than in calcium silicate?based group for 1 week (P<0.05). Conclusions The combined use of sodium hypochlorite and calcium silicate?based root canal sealer kills more biofilm cells in infected dentinal tubules.
