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Objectives: Calcifying nanoparticles (CNPs), referred to as nanobacteria (NB), are recognized to be associated with ectopic calcification. This study aims to isolate and culture CNPs from the dental plaque of patients with periodontal disease and investigate their possible role in unravelling the aetiology of periodontal disease.
Material And Methods: Supragingival and subgingival plaques were sampled from 30 periodontitis patients for CNPs isolation and culture. Alkaline phosphatase (ALP) content changes were tracked over time. Positive samples underwent thorough morphological identification via hematoxylin and eosin (HE) staining, Alizarin red S (ARS), and transmission electron microscopy (TEM). The chemical composition of CNPs analysis involved calcium (Ca) and phosphorus (P) content determination, Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD).
Results: The subgingival plaque dental group exhibited a higher CNPs isolation rate at 36.67% (11/30) compared to the supragingival dental plaque group at 66.67% (20/30). ALP activity varied among the positive, negative and control groups. Morphological observation characterized the CNPs as round, oval, and ellipsoid particles with Ca deposits. Chemical analysis revealed the Ca/P ratio was 0.6753. Hydroxyl, methyl, carbonate, phosphate, hydrogen phosphate, and dihydrogen phosphate were detected by FTIR; the main chemical components detected by XRD were hydroxyapatite and tricalcium phosphate.
Conclusion: CNPs were found in periodontitis-related dental plaque and exhibited the potential to develop calcified structures resembling dental calculus. However, the potential involvement of ALP in CNPs formation requires deeper exploration, as does the precise nature of its role and the interrelation with periodontitis demand a further comprehensive investigation.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11128756 | PMC |
http://dx.doi.org/10.1002/cre2.885 | DOI Listing |
iScience
December 2024
Department of Orthodontics, Peking University School and Hospital of Stomatology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices& Beijing Key Laboratory of Digital Stomatology & NHC Key Laboratory of Digital Stomatology & NMPA Key Laboratory for Dental Materials, No.22, Zhongguancun South Avenue, Haidian District, Beijing 100081, P.R. China.
The oral microbiome plays an important role in human health, and an imbalance of the oral microbiome could lead to oral and systemic diseases. Orthodontic treatment is an effective method to correct malocclusion. However, it is associated with many adverse effects, including white spot lesions, caries, gingivitis, periodontitis, halitosis, and even some systematic diseases.
View Article and Find Full Text PDFJ Esthet Restor Dent
December 2024
Department of Restorative Dentistry, Faculty of Dentistry, Marmara University, Istanbul, Turkiye.
Objective: This study aimed to compare dental plaque scores measured using clinical examination and different imaging methods.
Materials And Methods: Twenty-eight volunteers were included in the study and divided into two groups according to DMFT (D: Decayed, M: Missing, F: Filling, T: Teeth) scores (under 3 and over 10). Dental plaque on anterior labial surfaces' was scored using clinical visual examination with/without staining and different imaging systems (Digital photography, intraoral digital scanning, FluoreCam).
Mol Microbiol
December 2024
Department of Microbiology and Cell Science, IFAS, University of Florida, Gainesville, Florida, USA.
Queuosine (Q) is a modification of the wobble base in tRNAs that decode NA(C/U) codons. It is ubiquitous in bacteria, including many pathogens. Streptococcus mutans is an early colonizer of dental plaque biofilm and a key player in dental caries.
View Article and Find Full Text PDFShanghai Kou Qiang Yi Xue
October 2024
Department of Stomatology, Shandong Provincial Chronic Disease Hospital (Shandong Rehabilitation Center). Qingdao 266000, China. E-mail:
Purpose: To analyze the repair effect of glass fiber post combined with zirconia all ceramic crown in tooth defects and explore the relevant factors affecting the therapeutic effect.
Methods: A total of 100 patients(142 teeth) with dental defects admitted to Shandong Provincial Chronic Disease Hospital from January 2018 to January 2021 were selected as the study subjects. They were divided into an experimental group (glass fiber post combined with zirconia all ceramic crown restoration) with 70 patients(98 teeth) and the control group (metal post combined with zirconium dioxide all ceramic crown) with 30 patients (44 teeth).
Shanghai Kou Qiang Yi Xue
October 2024
Department of Pediatric Dentistry, Shanghai Xuhui District Dental Center. Shanghai 200032, China. E-mail:
Purpose: To evaluate the clinical effect of self-made oral science video on guiding parents to promote oral health of pre-school children, and to explore a more effective new technology in oral hygiene education.
Methods: One hundred and four 3-6 years old children with early childhood caries from Shanghai Xuhui District Dental Center were randomly recruited and divided into intervention group(n=52) and control group (n=52) during July to September 2022. At recruitment and 1 month after recruitment, the control group received routine oral health education, while the intervention group parents watched self-made oral health video and received routine oral health education.
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