title: Oral hygiene reinforcement in the simplified periodontal treatment of 1 hour.
abstract: OBJECTIVE
  To compare the clinical and microbiological outcome of the 1-h ultrasonic debridement of chronic periodontitis patients (CPP) with and without frequent sessions of oral hygiene reinforcement.
  
  
  METHODS
  Clinical measurements and subgingival plaque were collected from 44 CPP at baseline, 3- and 6-months. The control group received a single session of 1-h full-mouth ultrasonic debridement, while oral hygiene instructions (OHI) were reiterated over four visits. In the test group, OHI were limited in the 1-h treatment session. At 3-months, both groups received additional debridement and OHI. The "Checkerboard" DNA-DNA hybridization technique quantified Porphyromonas gingivalis, Tannerella forsythia and Treponema denticola in plaque.
  
  
  RESULTS
  At three months, smaller reductions in plaque and bleeding indices, and in P. gingivalis numbers were noted in the test group, while these differences disappeared at six months. After the 3-month re-treatment visit, the test group presented with a greater probing pocket depth (PPD) reduction. Plaque negatively affected PPD in a similar manner after both treatment approaches.
  
  
  CONCLUSIONS
  Lack of oral hygiene reinforcement in the 1-h full-mouth debridement resulted in higher plaque and bleeding scores and numbers of P. gingivalis at three months; professional removal of dental biofilm every three months is beneficial in subjects with compromised plaque control.
authors.affiliation: Department of Preventive Dentistry, Periodontology and Implant Biology, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece.
authors.forename: Danae A
authors.initials: DA
authors.lastname: Apatzidou
authors.forename: Penelope
authors.initials: P
authors.lastname: Zygogianni
authors.forename: Dimitra
authors.initials: D
authors.lastname: Sakellari
authors.forename: Antonis
authors.initials: A
authors.lastname: Konstantinidis
mesh_terms: D058491:Bacterial Load; D001439:Bacteroides / Q000302:isolation & purification; D018441:Biofilms; D055113:Chronic Periodontitis / Q000382:microbiology / Q000628:therapy*; D003742:Dental Devices, Home Care; D003773:Dental Plaque / Q000382:microbiology / Q000628:therapy; D003774:Dental Plaque Index; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009910:Oral Hygiene / Q000193:education*; D017622:Periodontal Attachment Loss / Q000382:microbiology / Q000628:therapy; D057747:Periodontal Debridement / Q000379:methods; D010512:Periodontal Index; D010514:Periodontal Pocket / Q000382:microbiology / Q000628:therapy; D016966:Porphyromonas gingivalis / Q000302:isolation & purification; D011446:Prospective Studies; D012054:Reinforcement, Psychology; D014099:Toothbrushing / Q000379:methods; D048373:Treponema denticola / Q000302:isolation & purification; D014465:Ultrasonics
keywords: oral hygiene reinforcement; periodontal treatment; plaque control; ultrasonic debridement