title: Unconventional Implant Placement Part III: Implant Placement Encroaching upon Residual Roots - A Report of Six Cases.
abstract: BACKGROUND
  When a residual root is found in the way of a planned implant placement, invasive surgery is usually performed in order to remove it. Consequently, implant therapy is rendered more complex and lengthy.
  
  
  OBJECTIVE
  We present 6 cases treated according to an unconventional protocol in which invasive surgery was avoided by allowing the implants to encroach upon the residual roots in order to permit a prosthetically driven surgery.
  
  
  METHODS
  Six patients were treated with 7 implants placed through a residual root (4 in the mandible and 3 in the maxilla). The residual roots had to be clinically and radiographically asymptomatic and covered by bone or healthy gingiva. The radiographic follow-up ranged from 20 months to 9 years.
  
  
  RESULTS
  Healing was uneventful. Implants were clinically stable, and radiographic examination did not show any unusual feature at the root-implant interface.
  
  
  CONCLUSIONS
  Several types of new implant-tissue interfaces were created in addition to the classical implant-bone interface, but this did not seem to jeopardize implant integration. Reports of more cases with a longer follow-up are needed before this protocol can be endorsed for routine application. Nonetheless, if confirmed as acceptable, this protocol might open intriguing possibilities; it might also lead to revision of one of the leading concepts in dental implantology.
authors.affiliation: Excellence in Dentistry Research Group, American Hospital of Paris, Paris, France.|Oral Biotechnology Laboratory, Department of Surgical Sciences, University of Cagliari, Cagliari, Italy.
authors.forename: Serge
authors.initials: S
authors.lastname: Szmukler-Moncler
authors.affiliation: Excellence in Dentistry Research Group, American Hospital of Paris, Paris, France.|Oral Rehabilitation Center, American Hospital of Paris, Paris, France.
authors.forename: Mithridade
authors.initials: M
authors.lastname: Davarpanah
authors.affiliation: Excellence in Dentistry Research Group, American Hospital of Paris, Paris, France.|Department of Prosthetics, Bretonneaux Hospital, Paris Descartes University, Paris, France.
authors.forename: Keyvan
authors.initials: K
authors.lastname: Davarpanah
authors.affiliation: Excellence in Dentistry Research Group, American Hospital of Paris, Paris, France.
authors.forename: Nedjoua
authors.initials: N
authors.lastname: Capelle-Ouadah
authors.affiliation: Excellence in Dentistry Research Group, American Hospital of Paris, Paris, France.|Department of Prosthetics, Charles Foix Hospital, Paris Descartes University, Paris, France.
authors.forename: Georgy
authors.initials: G
authors.lastname: Demurashvili
authors.affiliation: Excellence in Dentistry Research Group, American Hospital of Paris, Paris, France.|Oral Rehabilitation Center, American Hospital of Paris, Neuilly sur Seine, France.
authors.forename: Philippe
authors.initials: P
authors.lastname: Rajzbaum
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible; D008437:Maxilla; D008875:Middle Aged; D011861:Radiography, Dental; D014081:Tooth Extraction / Q000009:adverse effects; D014092:Tooth Root / Q000000981:diagnostic imaging / Q000601:surgery*
chemical_list: D015921:Dental Implants
keywords: implant-bone interface; implant-cement interface; implant-dentin interface; mineral integration; osseointegration; paradigm shift; residual roots