Journal of Materials Science: Materials in Medicine

, Volume 13, Issue 2, pp 225–232

Osteogenic proteins (bone sialoprotein and bone morphogenetic protein-7) and dental pulp mineralization

  • N. Six
  • F. Decup
  • J.-J. Lasfargues
  • E. Salih
  • M. Goldberg
Article

Abstract

Bone sialoprotein (BSP) cross-linked to collagen/gelatin was implanted in the pulp of rat’s upper molars. Comparison was carried out with a sham group (non implanted), with a group of rats receiving the carrier alone, and a group of molars where the perforated pulps were capped with calcium hydroxide. The cavities were occluded with a glass-ionomer cement (GIC). After 8, 14 and 30 days respectively the rats were killed by intracardiac perfusion of the fixative and processed for light microscopy. Dentin and predentin debris pushed into the pulp during the preparation enhanced self-repair processes, with large pulp remnants. The carrier alone induced slight inflammation, and calcium hydroxide the formation of a reparative dentin bridge. BSP stimulated the recruitment of cells which produced an homogeneous atubular dentin-like structure, filling after one month the mesial third of the crown pulp. Osteogenic protein (OP-1) used in the same experimental conditions induced the formation of osteodentin in the coronal pulp and the radicular part of the pulp was totally filled by a mineralized material. The differences reported here suggest two possible different therapeutic approaches with the two osteogenic proteins, BSP inducing pulp mineralization in the crown part, and OP-1 occluding the root part of the pulp.

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Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • N. Six
    • 1
    • 2
  • F. Decup
    • 1
  • J.-J. Lasfargues
    • 1
  • E. Salih
    • 3
  • M. Goldberg
    • 1
  1. 1.Laboratoire de Biologie et Physiopathologie Crânio-FacialeFaculté de Chirurgie Dentaire UniversitéParis V
  2. 2.Department of Conservative DentistryPrince of Songkla UniversityThailand
  3. 3.Laboratory for the Study of Skeletal Disorders and Rehabilitation, Department of Orthopedic SurgeryHarvard Medical School and Children’s HospitalBostonUSA

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