title: Effect of piezocision on root resorption associated with orthodontic force: A microcomputed tomography study.
abstract: BACKGROUND
  The purpose of this study was to investigate the effect of piezocision on orthodontically induced inflammatory root resorption.
  
  
  METHODS
  Fourteen patients were included in this split-mouth study; 1 side was assigned to piezocision, and the other side served as the control. Vertical corticotomy cuts of 4 to 5 mm in length were performed on either side of each piezocision premolar, and 150-g buccal tipping forces were applied to the premolars. After 4 weeks, the maxillary first premolars were extracted and scanned with microcomputed tomography.
  
  
  RESULTS
  There was a significantly greater total amount of root resorption seen on the piezocision sides when compared with the control sides (P = 0.029). The piezocision procedure resulted in a 44% average increase in root resorption. In 5 patients, there was noticeable piezocision-related iatrogenic root damage. When that was combined with the orthodontic root resorption found on the piezocision-treated teeth, there was a statistically significant 110% average increase in volumetric root loss when compared with the control side (P = 0.005).
  
  
  CONCLUSIONS
  The piezocision procedure that initiates the regional acceleratory phenomenon may increase the iatrogenic root resorption when used in conjunction with orthodontic forces. Piezocision applied close to the roots may cause iatrogenic damage to the neighboring roots and should be used carefully.
authors.affiliation: Discipline of Orthodontics, Faculty of Dentistry, University of Sydney, Sydney Dental Hospital, Sydney South West Area Health Service, Sydney, Australia.
authors.forename: Braydon M
authors.initials: BM
authors.lastname: Patterson
authors.affiliation: Discipline of Orthodontics, Faculty of Dentistry, University of Sydney, Sydney Dental Hospital, Sydney South West Area Health Service, Sydney, Australia.
authors.forename: Oyku
authors.initials: O
authors.lastname: Dalci
authors.affiliation: Discipline of Orthodontics, Faculty of Dentistry, University of Sydney, Sydney Dental Hospital, Sydney South West Area Health Service, Sydney, Australia; Department of Oral Surgery and Implantology, Aristotle University of Thessaloniki, Thessaloniki, Greece.
authors.forename: Alexandra K
authors.initials: AK
authors.lastname: Papadopoulou
authors.affiliation: Discipline of Periodontics, Faculty of Dentistry, University of Sydney, Sydney Dental Hospital, Sydney South West Area Health Service, Sydney, Australia.
authors.forename: Suman
authors.initials: S
authors.lastname: Madukuri
authors.affiliation: Discipline of Periodontics, Faculty of Dentistry, University of Sydney, Sydney Dental Hospital, Sydney South West Area Health Service, Sydney, Australia.
authors.forename: Jonathan
authors.initials: J
authors.lastname: Mahon
authors.affiliation: Department of Statistics, Macquarie University, Sydney, Australia.
authors.forename: Peter
authors.initials: P
authors.lastname: Petocz
authors.affiliation: Discipline of Orthodontics, Faculty of Dentistry, University of Sydney, Sydney Dental Hospital, Sydney South West Area Health Service, Sydney, Australia; Department of Oral Surgery and Implantology, Aristotle University of Thessaloniki, Thessaloniki, Greece.
authors.forename: Axel
authors.initials: A
authors.lastname: Spahr
authors.affiliation: Discipline of Orthodontics, Faculty of Dentistry, University of Sydney, Sydney Dental Hospital, Sydney South West Area Health Service, Sydney, Australia. Electronic address: ali.darendeliler@sydney.edu.au.
authors.forename: M Ali
authors.initials: MA
authors.lastname: Darendeliler
mesh_terms: D000293:Adolescent; D001641:Bicuspid / Q000601:surgery; D001732:Bite Force; D005260:Female; D006801:Humans; D008297:Male; D059745:Piezosurgery / Q000009:adverse effects*; D012391:Root Resorption / Q000000981:diagnostic imaging / Q000209:etiology*; D014081:Tooth Extraction / Q000379:methods; D014092:Tooth Root / Q000000981:diagnostic imaging / Q000601:surgery; D055114:X-Ray Microtomography; D055815:Young Adult