Diminished treatment response of periodontally diseased patients infected with the JP2 clone of Aggregatibacter (Actinobacillus) actinomycetemcomitans.
This longitudinal study evaluated the response to periodontal treatment by subjects infected with either JP2 (n = 25) or non-JP2 (n = 25) Aggregatibacter (Actinobacillus) actinomycetemcomitans. Participants were treated during the first 4 months by receiving (i) scaling and root planing, (ii) systemic antibiotic therapy, and (iii) periodontal surgery. Probing depth (PD), clinical attachment level (CAL), and gingival and plaque indices (GI and PI, respectively) were monitored at baseline and at 12 months, along with DNA-PCR-based subgingival detection of JP2 or non-JP2 A. actinomycetemcomitans. At baseline, PD, CAL, and GI scores were statistically higher in the JP2 strain-positive group than the non-JP2-strain-positive group. At 12 months, PD, CAL, and GI scores had decreased significantly for both groups, but the reduction rates of PD and CAL were higher in the non-JP2-strain-positive group. Among JP2-strain-positive patients in the baseline, patients who remained JP2 strain positive at 12 months showed significantly higher GIs than did the patients who had lost the detectable JP2 clone. Patients who remained JP2 strain positive at 12 months appeared to be more resistant to mechanical-chemical therapy than did those who were still non-JP2 strain positive, while the elimination of JP2 A. actinomycetemcomitans remarkably diminished gingival inflammation. Early identification and elimination of the JP2 clone of A. actinomycetemcomitans will enable practitioners to effectively predict the outcome of treatments applied to periodontal patients.
Cortelli
Sheila Cavalca
SC
Department of Periodontology, Dental Research Division, University of Taubaté, Taubaté, São Paulo, Brazil. cavalcacortelli@uol.com.br
Costa
Fernando Oliveira
FO
Kawai
Toshihisa
T
Aquino
Davi Romeiro
DR
Franco
Gilson Cesar Nobre
GC
Ohara
Kazuhisa
K
Roman-Torres
Caio Vinícius Gonçalves
CV
Cortelli
José Roberto
JR
D000293:Adolescent; D000328:Adult; D016976:Aggregatibacter actinomycetemcomitans / Q000145:classification* / Q000302:isolation & purification*; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D005260:Female; D005881:Gingiva / Q000473:pathology; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D010510:Periodontal Diseases / Q000188:drug therapy / Q000382:microbiology* / Q000473:pathology* / Q000601:surgery; D012720:Severity of Illness Index; D014092:Tooth Root / Q000473:pathology; D016896:Treatment Outcome; D055815:Young Adult
D000900:Anti-Bacterial Agents