title: Lack of influence of the Schneiderian membrane in forming new bone apical to implants simultaneously installed with sinus floor elevation: an experimental study in monkeys.
abstract: OBJECTIVE
  To describe the early healing processes around the implants installed after elevation of the sinus mucosa applying the lateral access technique without the use of grafting material.
  
  
  METHODS
  Immediately after the elevation of the maxillary sinus Schneiderian membrane by the lateral approach in eight monkeys, implants were installed without the use of grafting material. The healing of the tissue around the implants was evaluated after 4, 10, 20 and 30 days. Ground sections were prepared and analyzed histologically.
  
  
  RESULTS
  After 4 days of healing, the formation of coagulum and provisional matrix was documented within the elevated area. At 10-day interval, sprouts of woven bone were in continuity with the parent bone, and partly in contact with the implant surface at the base of the augmented area. While bone-to-implant contact increased after 20 and 30 days, the area underneath the Schneiderian membrane appeared reduced in volume and condensed toward the apex of the implants. The sinus mucosa was to some extent collapsed onto the implant surface and on the newly formed bone.
  
  
  CONCLUSIONS
  The void initially occupied by the coagulum after sinus membrane elevation shrank substantially during the observation period. A lack of influence of the Schneiderian membrane in bone formation apical to implants was documented in the early phase of healing.
authors.affiliation: Faculty of Dentistry of Araçatuba, São Paulo State University, São Paulo, BrazilARDEC, Ariminum Odontologica, Oral Surgery Division, Rimini, ItalyThe University of Hong Kong, Prince Philip Dental Hospital, Hong Kong SAR, PR China.
authors.forename: Alessandro
authors.initials: A
authors.lastname: Scala
authors.affiliation: Faculty of Dentistry of Araçatuba, São Paulo State University, São Paulo, BrazilARDEC, Ariminum Odontologica, Oral Surgery Division, Rimini, ItalyThe University of Hong Kong, Prince Philip Dental Hospital, Hong Kong SAR, PR China.
authors.forename: Daniele
authors.initials: D
authors.lastname: Botticelli
authors.affiliation: Faculty of Dentistry of Araçatuba, São Paulo State University, São Paulo, BrazilARDEC, Ariminum Odontologica, Oral Surgery Division, Rimini, ItalyThe University of Hong Kong, Prince Philip Dental Hospital, Hong Kong SAR, PR China.
authors.forename: Rafael Silveira
authors.initials: RS
authors.lastname: Faeda
authors.affiliation: Faculty of Dentistry of Araçatuba, São Paulo State University, São Paulo, BrazilARDEC, Ariminum Odontologica, Oral Surgery Division, Rimini, ItalyThe University of Hong Kong, Prince Philip Dental Hospital, Hong Kong SAR, PR China.
authors.forename: Idelmo
authors.initials: I
authors.lastname: Garcia Rangel
authors.affiliation: Faculty of Dentistry of Araçatuba, São Paulo State University, São Paulo, BrazilARDEC, Ariminum Odontologica, Oral Surgery Division, Rimini, ItalyThe University of Hong Kong, Prince Philip Dental Hospital, Hong Kong SAR, PR China.
authors.forename: José
authors.initials: J
authors.lastname: Américo de Oliveira
authors.affiliation: Faculty of Dentistry of Araçatuba, São Paulo State University, São Paulo, BrazilARDEC, Ariminum Odontologica, Oral Surgery Division, Rimini, ItalyThe University of Hong Kong, Prince Philip Dental Hospital, Hong Kong SAR, PR China.
authors.forename: Niklaus P
authors.initials: NP
authors.lastname: Lang
mesh_terms: D000818:Animals; D002428:Cebus; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D008297:Male; D008443:Maxillary Sinus / Q000601:surgery*; D009297:Nasal Mucosa / Q000601:surgery*; D013516:Oral Surgical Procedures, Preprosthetic / Q000379:methods; D010012:Osteogenesis / Q000502:physiology*; D010027:Osteotomy; D010784:Photomicrography; D014945:Wound Healing / Q000502:physiology*
chemical_list: D015921:Dental Implants