Abstract:
OBJECTIVES:The aim of this study was to evaluate the plaque pH level and ureolytic activity among children and adults of Karen Hill tribes. METHODS:Thirty-four children aged 6-10 years and 46 adults aged 20-38 years were interviewed regarding oral hygiene practices, sucrose intake and betel chewing. Caries experience (DMFT and DT), calculus, bleeding on probing (BoP) and Plaque index (PlI) were registered. Ureolytic activity in supragingival plaque was tested at two interproximal sites (11/12 and 41/42) with the rapid urease test (RUT). Registration of plaque pH was performed at two interproximal sites (15/16 and 31/41) before, during and 30 min after rinsing with an urea solution (0.25%). Four interproximal plaque samples (one from each quadrant) per individual were collected to test the bacterial composition using the checkerboard technique. RESULTS:Children and adults had similarly low DMFT and DT values. Children had a higher baseline pH and a higher ureolytic activity in the maxilla (p < 0.05) compared with adults. A significant correlation (r (2) = 0.63) was found between baseline pH and urease activity in the mandibular anterior teeth. Caries-free individuals had a higher baseline pH compared with caries active individuals in the anterior mandibular region (p < 0.01). The microbiological composition was characterized by an anaerobic low acidiogenic microbiota. CONCLUSIONS:Dental plaque pH is related to the ureolytic activity, which explains the low acidogenic plaque microflora and the low caries levels in the Karen population.
journal_name
Acta Odontol Scandjournal_title
Acta odontologica Scandinavicaauthors
Appelgren L,Dahlén A,Eriksson C,Suksuart N,Dahlén Gdoi
10.3109/00016357.2013.794952subject
Has Abstractpub_date
2014-04-01 00:00:00pages
194-201issue
3eissn
0001-6357issn
1502-3850journal_volume
72pub_type
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