Local application of IGF1 on dental pulp mechanically exposed; in vivo study on rabbit.

IGF1 (Insulin Growth Factor, 1) was intentionally applied onto pulp tissues, aiming to provoque a dentine regeneration process through the stimulation of the dentinoblasts' potententials. 72 cavities were hence performed on rabbit molars, intentionally exposing the dental pulp. Different concentrations of IGF1 were then applied; The histo and anatomo-pathological observations showed persistent vitality of the pulp without any sign of necrosis, even 6 weeks after the IGF1 application. Dentinoblasts layers (as an indication of the regeneration activity) were counted, according to a pre-established protocol, at days 7, 14, 22, 28 and 42. The type of the applied IGF1, was carefully selected to be "Binding Protein Resistant" (IGF-BPR), so to avoid any inhibition of the IGF1 action by the endogenous binding proteins (Hochscheid and coll). The results were conclusive in indicating the IGF1 as an efficient dental pulp capping product.