Enamel matrix derivative and transforming growth factor-beta1 in Class III furcation defects. A histomorphometric study in dogs.
The objective of this study was to evaluate histomorphometrically, in dogs, the effect of enamel matrix derivative (EMD), with or without transforming growth factor-beta1 (TGF-beta1), in a periodontal Class III furcation model. Class III furcation defects were created in P3 and P4 of six dogs. The defects were allowed to stabilize for 21 days. Four experimental conditions were established: G1: control (propylene glycol alginate); G2: EMD; G3: TGF-beta1 and G4: EMD + TGF-beta1. After 12 weeks, the dogs were euthanized. Their jaws were removed, fixed, decalcified, dehydrated and embedded in paraffin. Semi-serial sections were obtained, stained and examined with light microscopy. The furcation defects were not completely closed in any specimen, with downgrowth of the junctional epithelium into the furcation area. The morphologic characteristics of the newly formed tissues in the test groups were similar to the control group, with slight differences in average values, but with no statistically significant differences between the groups. This study was not able to provide histological evidence that EMD, TGF-beta1 and EMD + TGF-beta1 present additional advantages in periodontal bone formation in a Class III furcation model in dogs.
Department of Bucco-Maxillo-Facial Surgery and Traumatology and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
Daniela B
DB
Palioto
Guilherme
G
de O Macedo
Adriana C
AC
Queiroz
Mário
M
Taba
Sérgio L S
SL
Souza
Márcio F M
MF
Grisi
Arthur B
AB
Novaes
D000818:Animals; D001861:Bone Regeneration / Q000187:drug effects; D003746:Dental Enamel Proteins / Q000627:therapeutic use*; D004285:Dogs; D004338:Drug Combinations; D017823:Furcation Defects / Q000188:drug therapy* / Q000601:surgery; D053773:Transforming Growth Factor beta1 / Q000627:therapeutic use*
D003746:Dental Enamel Proteins; D004338:Drug Combinations; D053773:Transforming Growth Factor beta1; C109069:enamel matrix proteins