title: Attachment loss after scaling and root planing with different instruments. A clinical study.
abstract: OBJECTIVE
  The aim of this study was to evaluate clinically the immediate effect of trauma from instrumentation after scaling and root planing with different instruments.
  
  
  METHODS
  Ten subjects with moderate chronic periodontitis, presenting probing depths ranging from 3.5 to 6.5 mm on anterior teeth, upper and/or lower, were selected. Teeth were randomly assigned to one of the following groups: MC group--scaled and planed with Gracey mini-curettes (MiniFive); CC group--scaled and planed with Gracey conventional curettes. The selected teeth were probed with a computerized electronic probe, guided by an occlusal stent, and then subjected to scaling and root planing. Immediately following instrumentation, teeth were probed again. The difference between relative attachment level (RAL) immediately before and after instrumentation was considered as trauma from instrumentation.
  
  
  RESULTS
  Intra-group analysis revealed statistically significant differences between RAL immediately before and after instrumentation in both groups (0.68 +/- 0.32 for MC group; and 0.83 +/- 0.41 for CC group--p < 0.05). However, inter-group analysis did not show a statistically significant difference in trauma from instrumentation caused by the different instruments.
  
  
  CONCLUSIONS
  Within the limits of this study, it was concluded that root instrumentation causes an average trauma from instrumentation of 0.76 mm with no differences between the tested instruments.
authors.affiliation: Department of Prosthodontics and Periodontics, School of Dentistry at Piracicaba, State University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil. dr_renatao@yahoo.com.br
authors.forename: Renato V
authors.initials: RV
authors.lastname: Alves
authors.forename: Luciana
authors.initials: L
authors.lastname: Machion
authors.forename: Márcio Z
authors.initials: MZ
authors.lastname: Casati
authors.forename: Francisco H
authors.initials: FH
authors.lastname: Nociti Júnior
authors.forename: Antônio W
authors.initials: AW
authors.lastname: Sallum
authors.forename: Enilson A
authors.initials: EA
authors.lastname: Sallum
mesh_terms: D000328:Adult; D002908:Chronic Disease; D012534:Dental Scaling / Q000295:instrumentation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017622:Periodontal Attachment Loss / Q000145:classification / Q000473:pathology*; D010513:Periodontal Ligament / Q000473:pathology*; D010514:Periodontal Pocket / Q000145:classification / Q000628:therapy; D010518:Periodontitis / Q000145:classification / Q000628:therapy*; D016745:Root Planing / Q000295:instrumentation; D013357:Subgingival Curettage / Q000295:instrumentation