Studies have suggested that individuals affected by extrinsic black tooth stains have less dental caries experience in comparison to those without this condition. The aim of the present study was to perform a systematic review and meta-analysis to determine whether there is scientific evidence demonstrating that extrinsic black stains are a protective factor for the occurrence of dental caries. This systematic review was developed in accordance with the PRISMA statement and the research question was determined using the PECO strategy. Electronic searches were conducted in the PubMed, Science Direct, Virtual Health Library, Cochrane, Web of Science, and Google Scholar databases for relevant articles published up to September 2018. All articles included were submitted to an appraisal of methodological quality using the Newcastle-Ottawa Scale and the data were extracted for meta-analysis. The search strategy resulted in the retrieval of 9,108 publications. After the application of the eligibility criteria, 18 articles were selected for analysis, 13 of which were included in the meta-analysis. The meta-analysis demonstrated that individuals with extrinsic black stains involving primary (median, MD: -0.78 [-1.09; -0.48]; I2 = 44%) and permanent (MD: -0.50 [-0.93; -0.08]; I2 = 86%) teeth have a lower dental caries experience in comparison to those without this condition. Patients with extrinsic black tooth stains have a lower dental caries experience in cross-sectional studies.
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http://dx.doi.org/10.1159/000500476 | DOI Listing |
Zool Stud
September 2024
German Centre for Marine Biodiversity Research (DZMB), c/o Biozentrum Grindel, Martin-Luther-King-Platz 3, 20146 Hamburg, Germany. E-mail: (Neuhaus) ; (Brix).
Confined by the Mid-Atlantic Ridge and the European continental shelf, the deep-sea acorn barnacle (Hoek, 1883) lives in the northeast Atlantic deep sea, where it has been frequently reported in high current areas. Cemented to a solid substrate during its entire adult life, the species can only disperse by means of planktotrophic nauplius larvae. This study reports on the occurrence, ecology and genetic connectivity of from four sites within the northeastern Iceland Basin and presents the first record of the species living affiliated with hydrothermal vent field on the Reykjanes Ridge axis.
View Article and Find Full Text PDFBiol Lett
December 2024
Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada.
The timing and amount of foraging in birds are shaped by many of the same extrinsic factors, including temperature and daylength, as well as intrinsic factors, such as sex and age. Here, we investigate co-variation between these traits. We observed a population of 143 individually marked black-capped chickadees () over a 90 day period during the winter.
View Article and Find Full Text PDFMenopause
January 2025
Departments of Medicine and Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI.
Mol Ecol
January 2025
School of Aquatic and Fishery Sciences, University of Washington, Seattle, Washington, USA.
Int J Paediatr Dent
November 2024
Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, 2/F Prince Philip Dental Hospital, The University of Hong Kong, Hong Kong SAR, China.
Background: Dental caries and extrinsic black tooth stain (EBS) are prevalent among children, with current evidence suggesting a negative correlation between them. It is unclear whether the factors contributing to developing or preventing dental caries and EBS are connected or aligned.
Aim: To investigate the prevalence and associated factors of caries and EBS among children with primary, mixed and permanent dentitions.
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