Implant osseointegration in circumferential bone defects treated with latex-derived proteins or autogenous bone in dog's mandible.
BACKGROUND
In sites with diminished bone volume, the osseointegration of dental implants can be compromised. Innovative biomaterials have been developed to aid successful osseointegration outcomes.


OBJECTIVE
The aim of this study was to evaluate the osteogenic potential of angiogenic latex proteins for improved bone formation and osseointegration of dental implants.


METHODS
Ten dogs were submitted to bilateral circumferential defects (5.0 × 6.3 mm) in the mandible. Dental implant (3.3 × 10.0 mm, TiUnite MK3™, Nobel Biocare AB, Göteborg, Sweden) was installed in the center of the defects. The gap was filled either with coagulum (Cg), autogenous bone graft (BG), or latex angiogenic proteins pool (LPP). Five animals were sacrificed after 4 weeks and 12 weeks, respectively. Implant stability was evaluated using resonance frequency analysis (Osstell Mentor, Osstell AB, Göteborg, Sweden), and bone formation was analyzed by histological and histometric analysis.


RESULTS
LPP showed bone regeneration similar to BG and Cg at 4 weeks and 12 weeks, respectively (p ≥ .05). Bone formation, osseointegration, and implant stability improved significantly from 4 to 12 weeks (p ≤ .05).


CONCLUSIONS
Based on methodological limitations of this study, Cg alone delivers higher bone formation in the defect as compared with BG at 12 weeks; compared with Cg and BG, the treatment with LPP exhibits no advantage in terms of osteogenic potential in this experimental model, although overall osseointegration was not affected by the treatments employed in this study.
Department of Oral and Maxillofacial Surgery and Periodontics, Faculty of Dentistry of Ribeirao Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
Maya Fernanda
MF
Manfrin Arnez
Samuel Porfírio
SP
Xavier
Paulo Esteves
PE
Pinto Faria
Wagner Fernandes
WF
Pedrosa Júnior
Tatiana Ramirez
TR
Cunha
Ricardo José
RJ
de Mendonça
Joaquim
J
Coutinho-Netto
Luiz Antonio
LA
Salata
D000540:Alveolar Ridge Augmentation / Q000379:methods*; D042501:Angiogenic Proteins / Q000494:pharmacology; D000818:Animals; D001777:Blood Coagulation; D001861:Bone Regeneration / Q000187:drug effects*; D016025:Bone Transplantation; D015921:Dental Implants; D004285:Dogs; D028482:Hevea; D007840:Latex; D008297:Male; D008334:Mandible / Q000601:surgery; D018919:Neovascularization, Physiologic / Q000187:drug effects; D016348:Osseointegration / Q000187:drug effects*; D010940:Plant Proteins / Q000494:pharmacology*
D042501:Angiogenic Proteins; D015921:Dental Implants; D007840:Latex; D010940:Plant Proteins