title: Effect of segmental Le Fort I osteotomy on maxillary tooth type-related pulpal blood-flow characteristics.
abstract: Laser Doppler flowmetry (LDF) is a noninvasive method to assess pulpal blood-flow (PBF). Osteotomies may have segment-related losses of pulpal sensibility.
  
  
  OBJECTIVE
  To determine the effect of segmental Le Fort I osteotomy on tooth-type related PBF values.
  
  
  METHODS
  In 12 volunteers, maxillary incisors, canines, and premolars were investigated bilaterally by LDF to assess local PBF values before and after surgery. Perfusion units (PU) were in 3 sessions, on the day before surgery and at 4 and 56 days after osteotomy.
  
  
  RESULTS
  Measurements before surgery were significantly higher than at 4 days after surgery for the canine (P <.01) and for the overall PBF values (P <.01). At 4 days assessment, PBF values of tooth types adjacent to vertical osteotomy cuts showed a significant decrease for the lateral incisors (P <.05), canines, and first premolars (P <.05), with no significant differences between the preoperative and postoperative values for tooth types not adjacent to vertical osteotomy cuts (P <.05).
  
  
  CONCLUSIONS
  Segmental Le Fort I osteotomy induced a short-term and long-term decrease in maxillary PBF values of tooth types adjacent to vertical osteotomy cuts.
authors.affiliation: Department of Oral and Maxillofacial Surgery, University of Innsbruck, Innsbruck, Austria. Maxillofaziale-Chirurgie@uibk.ac.at
authors.forename: R
authors.initials: R
authors.lastname: Emshoff
authors.forename: R
authors.initials: R
authors.lastname: Kranewitter
authors.forename: S
authors.initials: S
authors.lastname: Gerhard
authors.forename: B
authors.initials: B
authors.lastname: Norer
authors.forename: B
authors.initials: B
authors.lastname: Hell
mesh_terms: D000293:Adolescent; D000328:Adult; D002138:Calibration; D003782:Dental Pulp / Q000098:blood supply*; D005260:Female; D006801:Humans; D017078:Laser-Doppler Flowmetry / Q000295:instrumentation / Q000379:methods / Q000706:statistics & numerical data; D008297:Male; D008437:Maxilla / Q000601:surgery*; D019340:Osteotomy, Le Fort / Q000379:methods; D012039:Regional Blood Flow; D013997:Time Factors