Peri-implant reconstruction using autologous periosteum-derived cells and guided bone regeneration.
OBJECTIVE
This investigation evaluated the bone healing in peri-implant defects treated with periosteum-derived cells (PCs) and guided bone regeneration (GBR).


METHODS
PCs were harvested from six beagle dogs and characterized in vitro with regard to their osteogenic properties. The animals were subjected to teeth extraction in the mandible, and after 3 months of healing, implant sites were drilled, bone dehiscences were created and implants were placed. Dehiscences were randomly assigned to: PCs+GBR, GBR, PCs and non-treated defects. After 3 months, the implants/adjacent tissues were processed. Bone-to-implant contact (BIC) bone fill (BF) within implant threads, and bone area (BA) in a zone lateral to the implant were obtained.


RESULTS
In vitro analyses confirmed the osteogenic potential of PCs. Histometrically, no statistically significant differences were observed among the PCs+GBR, GBR and PCs groups for both BF and BIC (p>0.05), whereas these groups showed statistically higher values, as compared with the non-treated group (p<0.05). With respect to BA, the PCs+GBR and GBR groups presented significantly higher means, as compared with the PCs and non-treated groups (p<0.05).


CONCLUSIONS
Although successful outcomes have been promoted by using the combined approach, PCs in conjunction with membranes did not provide additional benefit during peri-implant bone regeneration, when compared with the therapeutic approaches used alone.
Department of Prosthodontics and Periodontics, School of Dentistry at Piracicaba, University of Campinas (UNICAMP), Piracicaba, São Paulo, Brazil.
Fernanda Vieira
FV
Ribeiro
Fabricia Ferreira
FF
Suaid
Karina Gonzales Silverio
KG
Ruiz
Thaisângela Lopes
TL
Rodrigues
Marcelo Diniz
MD
Carvalho
Francisco Humberto
FH
Nociti
Enilson Antonio
EA
Sallum
Márcio Zaffalon
MZ
Casati
D016301:Alveolar Bone Loss / Q000601:surgery*; D000539:Alveolar Process / Q000473:pathology; D000818:Animals; D001861:Bone Regeneration / Q000502:physiology*; D002454:Cell Differentiation / Q000502:physiology; D002469:Cell Separation; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D004285:Dogs; D016557:Guided Tissue Regeneration, Periodontal / Q000379:methods*; D008334:Mandible / Q000473:pathology / Q000601:surgery*; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D016348:Osseointegration / Q000502:physiology; D010012:Osteogenesis / Q000502:physiology; D010521:Periosteum / Q000166:cytology / Q000637:transplantation*; D011897:Random Allocation; D023822:Tissue Engineering / Q000379:methods; D054457:Tissue Scaffolds; D020858:Tissue and Organ Harvesting; D014182:Transplantation, Autologous; D016896:Treatment Outcome
D015921:Dental Implants; D008567:Membranes, Artificial