title: Subgingival plaque sampling after combined mechanical and antibiotic nonsurgical periodontal therapy.
abstract: OBJECTIVE
  This study aimed to make a comparison of two sampling strategies of subgingival plaque after combined mechanical-antibiotic periodontal therapy.
  
  
  METHODS
  Thirty patients (18 female) suffering from aggressive (n = 12) or generalised severe chronic (n = 18) periodontitis were included. Aggregatibacter actinomycetemcomitans had been detected subgingivally in all prior to anti-infective therapy (AT) and combined mechanical-antibiotic AT had been rendered. After AT clinical examinations were performed and subgingival plaque was sampled from the same four sites as prior to AT (ASPRE) as well as from the four deepest sites after AT (DEEP). Per patient two pooled samples (ASPRE/DEEP) were generated and analysed for A. actinomycetemcomitans, Porphyromonas gingivalis, Tannerella forsythia and Treponema denticola using a commercial 16S rRNA test.
  
  
  RESULTS
  ASPRE failed to detect A. actinomycetemcomitans, DEEP detected A. actinomycetemcomitans only in two patients (7 %). Only for T. forsythia DEEP (53 %) provided higher detection frequencies than ASPRE (27 %; p = 0.005). Detection frequencies of P. gingivalis and T. denticola ranged from 47 to 53 %.
  
  
  CONCLUSIONS
  After combined mechanical-antibiotic AT sampling the deepest sites revealed higher detection rates. Combined mechanical-antibiotic AT suppresses A. actinomycetemcomitans to a higher extent than P. gingivalis, T. forsythia and T. denticola.
authors.affiliation: Department of Periodontology, Centre for Dentistry and Oral Medicine (Carolinum), Johann Wolfgang Goethe-University Frankfurt/Main, Theodor-Stern-Kai 7 (Haus 29), 60596, Frankfurt, Germany.
authors.forename: Tatjana
authors.initials: T
authors.lastname: Ramich
authors.forename: Beate
authors.initials: B
authors.lastname: Schacher
authors.forename: Susanne
authors.initials: S
authors.lastname: Scharf
authors.forename: Lasse
authors.initials: L
authors.lastname: Röllke
authors.forename: Rita
authors.initials: R
authors.lastname: Arndt
authors.forename: Peter
authors.initials: P
authors.lastname: Eickholz
authors.forename: Katrin
authors.initials: K
authors.lastname: Nickles
mesh_terms: D000328:Adult; D010520:Aggressive Periodontitis / Q000382:microbiology* / Q000628:therapy*; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D058491:Bacterial Load; D055113:Chronic Periodontitis / Q000382:microbiology* / Q000628:therapy*; D003131:Combined Modality Therapy; D003773:Dental Plaque / Q000382:microbiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013357:Subgingival Curettage; D016896:Treatment Outcome
chemical_list: D000900:Anti-Bacterial Agents