Journal
JOURNAL OF CLINICAL PERIODONTOLOGY
Volume 41, Issue 3, Pages 232-241Publisher
WILEY
DOI: 10.1111/jcpe.12209
Keywords
A. actinomycetemcomitans; adolescent; attachment loss; Ghana; JP2 genotype; leukotoxin; periodontitis; progression
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Funding
- Swedish National Graduate School in Odontological Science
- Swedish Dental Association, Ingeborg
- Leo Dannins Foundation
- Aarhus University Research Foundation [F-2009-SUN-1-57]
- Danish Dental Association (KOF)
- Dental Association Account for Dental Research Fund for the Promotion of Scientific and Dental Practice
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Aim: To assess the progression of attachment loss (AL) during a 2-year period according to the presence of JP2 and non-JP2 genotypes of Aggregatibacter actinomycetemcomitans in a Ghanaian adolescent population. MethodsA total of 500 adolescents (mean age 13.2years, SD1.5) were enrolled in the study. After 2years, 397 (79.4%) returned for a periodontal re-examination, including the measurement of AL. The carrier status of the JP2 and non-JP2 genotypes of A. actinomycetemcomitans was evaluated in a baseline examination 2years earlier. ResultsIndividuals who carried the JP2 genotype of A. actinomycetemcomitans had a significantly increased risk [relative risk (RR)=7.3] of developing AL3mm. The mean AL at the follow-up and the mean 2-year progression of AL were significantly higher in the JP2 genotype-positive group (n=38) compared with the group positive for the non-JP2 genotypes of A. actinomycetemcomitans (n=169), and the group of A. actinomycetemcomitans-negative individuals (n=190). The JP2 genotype was strongly associated with the progression of AL3mm (OR=14.3). The non-JP2 genotypes of A. actinomycetemcomitans were also, however, less pronounced, associated with the progression of AL3mm (OR=3.4). Conclusion: The JP2 genotype of A. actinomycetemcomitans is strongly associated with the progression of AL.
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