title: Tooth auto-transplantation with double periodontal ligament stimulation to replace periodontally compromised teeth.
abstract: BACKGROUND
  The healing process of autotransplantation puts 2 different tissues in competition: the ligament on the root surface and the bone tissue of the alveolus. This study shows the effects of a protocol with 2 surgical stages, which promote ligament repair, inhibit adhesion between bone and dental root, and reduce the occurrence of the ankylosis-root resorption phenomenon.
  
  
  METHODS
  Forty-three patients, 33 to 73 years old, received 47 transplantations of mature teeth (including retained teeth) during a 5-year period. During the first surgical step, the transplanted tooth is extracted, measured, immediately replaced in its origin site, and maintained with an original suture technique. The alveolus to which the tooth will be transplanted is adapted after extraction of the periodontally compromised tooth. The second surgery occurs at day 14, when regeneration of periodontal ligament (PDL) is at a maximum (first stimulation). The tooth is transplanted in its new alveolus and retained using the same suture technique to avoid a rigid splint and to create mechanical stimulation of the PDL (second stimulation).
  
  
  RESULTS
  The results were 95.75% positive with normal PDL, with a 4.25% failure rate (transplant loss) and no ankylosis. Mean probing reduction was 8.37 +/- 3.0 mm. Mean radiographic bone gain was 7.73 +/- 4.32 mm.
  
  
  CONCLUSIONS
  This study suggests that auto-transplantation with double PDL stimulation can be a viable treatment in clinical practice, especially to replace teeth with large periodontal lesions, deep furcation defects, and/or root fractures. This study shows the high potential of stimulated PDL to regenerate alveolar bone and periodontal structures in severe destruction sites.
authors.affiliation: Biomaterials and Biocompatibility Research Department, Université de Technologie de Compiègne, France.
authors.forename: Philippe C
authors.initials: PC
authors.lastname: Gault
authors.forename: Rita
authors.initials: R
authors.lastname: Warocquier-Clerout
mesh_terms: D000328:Adult; D000368:Aged; D016301:Alveolar Bone Loss / Q000601:surgery; D000543:Alveoloplasty; D000844:Ankylosis / Q000517:prevention & control; D002985:Clinical Protocols; D005260:Female; D005500:Follow-Up Studies; D017823:Furcation Defects / Q000601:surgery; D006085:Graft Survival; D006801:Humans; D008297:Male; D008875:Middle Aged; D010510:Periodontal Diseases / Q000601:surgery*; D010513:Periodontal Ligament / Q000601:surgery*; D010514:Periodontal Pocket / Q000601:surgery; D012391:Root Resorption / Q000517:prevention & control; D013223:Statistics as Topic; D013536:Suture Techniques; D013997:Time Factors; D014070:Tooth / Q000637:transplantation*; D014076:Tooth Diseases / Q000517:prevention & control; D014082:Tooth Fractures / Q000601:surgery; D014090:Tooth Replantation; D014092:Tooth Root / Q000293:injuries / Q000473:pathology; D014182:Transplantation, Autologous; D014945:Wound Healing