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Yang B, Song B, Liang J, Zhou X, Ren B, Peng X, Han Q, Li M, Cheng L. pH-responsive DMAEM Monomer for dental caries inhibition. Dent Mater 2023; 39:497-503. [PMID: 37019743 DOI: 10.1016/j.dental.2023.03.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 03/25/2023] [Accepted: 03/28/2023] [Indexed: 04/07/2023]
Abstract
Previous research indicated that there is an aggregate of microorganism in oral cavity which takes part in promoting the occurrence of dental caries, but few studies on anticaries materials for these 'core microbiome' were developed. And We've found that DMAEM monomer has an obvious inhibitory effect on the growth of Streptococcus mutans and saliva biofilm, but the effect of that on the "core microbiome" of caries need further research. Thus, the objectives of this study were to explore the effect of DMAEM monomer on the core microbiota of dental caries, and to further study its anticaries effect. The changes of microbial structure and metabolic activity of the core microbiota biofilm were detected through measuring lactic acid yield, viable bacteria counts and demineralization depth, et al., and the anticaries potential in vivo of DMAEM monomer was evaluated by rat caries model. Meanwhile, high-throughput sequencing was used to analyze the microbial diversity change of saliva samples of rats. The results showed that DMAEM monomer could inhibit the growth of the core microbiota biofilm, decrease the metabolic activity and the acid production, as well as reduce the ability of demineralization under acidic conditions. Moreover, the degree of caries in the DMAEM group was significantly reduced, and the diversity and the evenness of oral microecology in the rats were statistically higher. In summary, DMAEM monomer could respond to acidic environment, significantly inhibit the cariogenic ability of the 'core microbiome' of caries, and help to maintain the microecological balance of oral cavity.
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Affiliation(s)
- Bina Yang
- State Key Laboratory of Oral Diseases, West China school of Stomatology, National Clinical Research Centre for Oral Diseases, Sichuan University, Chengdu 610041, China; Department of Operative Dentistry and Endodontics, West China school of Stomatology, Sichuan University, Chengdu 610041, China; Department of stomatology, Zhongshan hospital of Xiamen University, Medical college of Xiamen University, Xiamen University, Xiamen 361000, China
| | - Bingqing Song
- State Key Laboratory of Oral Diseases, West China school of Stomatology, National Clinical Research Centre for Oral Diseases, Sichuan University, Chengdu 610041, China; Department of Operative Dentistry and Endodontics, West China school of Stomatology, Sichuan University, Chengdu 610041, China
| | - Jingou Liang
- State Key Laboratory of Oral Diseases, West China school of Stomatology, National Clinical Research Centre for Oral Diseases, Sichuan University, Chengdu 610041, China; Department of Pediatrics, West China School of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases, West China school of Stomatology, National Clinical Research Centre for Oral Diseases, Sichuan University, Chengdu 610041, China; Department of Operative Dentistry and Endodontics, West China school of Stomatology, Sichuan University, Chengdu 610041, China
| | - Biao Ren
- State Key Laboratory of Oral Diseases, West China school of Stomatology, National Clinical Research Centre for Oral Diseases, Sichuan University, Chengdu 610041, China
| | - Xian Peng
- State Key Laboratory of Oral Diseases, West China school of Stomatology, National Clinical Research Centre for Oral Diseases, Sichuan University, Chengdu 610041, China
| | - Qi Han
- State Key Laboratory of Oral Diseases, West China school of Stomatology, National Clinical Research Centre for Oral Diseases, Sichuan University, Chengdu 610041, China; Department of Pathology, West China School of Stomatology, Sichuan University, Chengdu 610041, China
| | - Mingyun Li
- State Key Laboratory of Oral Diseases, West China school of Stomatology, National Clinical Research Centre for Oral Diseases, Sichuan University, Chengdu 610041, China; Department of Operative Dentistry and Endodontics, West China school of Stomatology, Sichuan University, Chengdu 610041, China.
| | - Lei Cheng
- State Key Laboratory of Oral Diseases, West China school of Stomatology, National Clinical Research Centre for Oral Diseases, Sichuan University, Chengdu 610041, China; Department of Operative Dentistry and Endodontics, West China school of Stomatology, Sichuan University, Chengdu 610041, China.
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Anti-Caries Effects of Dental Adhesives Containing Quaternary Ammonium Methacrylates with Different Chain Lengths. MATERIALS 2017; 10:ma10060643. [PMID: 28773004 PMCID: PMC5554024 DOI: 10.3390/ma10060643] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 06/05/2017] [Accepted: 06/05/2017] [Indexed: 02/05/2023]
Abstract
The objectives of this study were to investigate the effects of dental adhesives containing quaternary ammonium methacrylates (QAMs) with different alkyl chain lengths (CL) on ecological caries prevention in vitro. Five QAMs were synthesized with a CL = 3, 6, 9, 12, and 16 and incorporated into adhesives. Micro-tensile bond strength and surface charge density were used to measure the physical properties of the adhesives. The proportion change in three-species biofilms consisting of Streptococcus mutans, Streptococcus sanguinis, and Streptococcus gordonii was tested using the TaqMan real-time polymerase chain reaction. Lactic acid assay, MTT [3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyltetrazolium bromide] assay, exopolysaccharide staining, live/dead staining, scanning electron microscopy (SEM), and transverse microradiography (TMR) were performed to study the anti-biofilm and anti-demineralization effects of the dental adhesives. The results showed that incorporating QAMs with different alkyl chain lengths into the adhesives had no obvious effect on the dentin bond strength. The adhesives containing QAMs with a longer alkyl chain developed healthier biofilms. The surface charge density, anti-biofilm, and anti-demineralization effects of the adhesives increased with a CL of the QAMs from 3 to 12, but decreased slightly with a CL from 12 to 16. In conclusion, adhesives containing QAMs with a tailored chain length are promising for preventing secondary caries in an “ecological way”.
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