Effect of an Antibacterial Monomer on the Antibacterial Activity of a Pit-and-Fissure Sealant.
Resin-based pit-and-fissure sealants are often used to form a barrier on the occlusal surface of molars to treat caries lesions; however, bacteria can remain in the pit and fissures without detection, increasing the risk of secondary caries. Sealants with antimicrobial properties or microbial repellent actions might be advantageous. The aim of this study was to assess the inhibitory effect of a 2-methacryloxylethyl dodecyl methyl ammonium bromide (MAE-DB)-incorporated sealant against Streptococcus mutans. MAE-DB (4% wt) was incorporated into a commercially available sealant, Eco-S resin-based pit-and-fissure sealant (Vericom Co., Ltd., Korea); a sealant without MAE-DB served as a negative control, and Clinpro™ Sealant (3M™ ESPE™), a fluoride-releasing resin, was used as a commercial control. The effects of the cured sealants and their eluents on the growth of S. mutans were determined according to colony-forming unit counts and metabolic tests. The effects of the cured sealants on the adherence and membrane integrity of S. mutans were investigated using confocal laser-scanning microscopy (CLSM) in conjunction with fluorescent indicators. Compared with the negative control and commercial control, the cured MAE-DB-incorporated pit-and-fissure sealant exhibited a significant inhibitory effect on the growth of S. mutans (P < 0.05), whereas the eluents did not show any detectable antibacterial activity. The commercial control also showed no detectable bactericidal activity. Moreover, the aged experimental material retained its property of contact inhibition of biofilm formation. The fluorescence analysis of CLSM images demonstrated that the cured MAE-DB-incorporated sealant could hamper the adherence of S. mutans and exert a detrimental effect on bacterial membrane integrity. The incorporation of MAE-DB can render a pit-and-fissure sealant with contact antibacterial activity after polymerization via influencing the growth, adherence, and membrane integrity of S. mutans. Therefore, MAE-DB-containing pit-and-fissure sealant shows promise for preventing or controlling dental caries on occlusal pit and fissures of molars.
State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Disease & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China.
Fan
F
Yu
State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Disease & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China.
Haohan
H
Yu
State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Disease & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China.
Pingting
P
Lin
State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Disease & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China.
Yan
Y
Dong
State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Disease & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China.
Ling
L
Zhang
State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Disease & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of VIP Dental Care, School of Stomatology, Fourth Military Medical University, Xi'an, China.
Xiang
X
Sun
State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Disease & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China.
Zhengya
Z
Liu
State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Disease & Shaanxi Key Laboratory of Stomatology, Department of Operative Dentistry & Endodontics, School of Stomatology, Fourth Military Medical University, Xi'an, Shaanxi, China.
Huihui
H
Guo
State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Disease & Shaanxi International Joint Research Center for Oral Diseases, Department of General Dentistry and Emergency, School of Stomatology, Fourth Military Medical University, Xi'an, Shaanxi, China.
Li
L
Huang
State Key Laboratory of Military Stomatology & National Clinical Research Centre for Oral Disease & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, China.
Jihua
J
Chen
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