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  • Title: Immunohistochemistry of bone sialoprotein and osteopontin during reparative dentinogenesis in vivo.
    Author: Zhang Q, Fan M, Bian Z, Chen Z, Zhu Q.
    Journal: Chin J Dent Res; 2000 Aug; 3(2):38-43. PubMed ID: 11314517.
    Abstract:
    OBJECTIVE: To investigate the stage-specific and tissue expression of bone sialoprotein (BSP) and osteopontin (OPN) during reparative dentinogenesis in vivo. METHODS: Direct pulp-capping with Ca(OH)2 developed a model used for the investigation of reparative dentinogenesis in the exposed dental pulp. In this model, standardized class V cavities were prepared close to the gingival margin on the buccal surface of each tooth. Animals were sacrificed 3, 7, and 10 days post-operation. Immunohistochemical staining determined the tissue-specific expression of BSP and OPN during the process. RESULTS: Odontoblast-like cells and reparative dentin reacted positively with BSP and OPN. The expression of BSP reached a peak at day 7, then gradually decreased, while the expression of OPN showed no significant difference between day 7 and day 10. CONCLUSION: BSP and OPN may play different roles in reparative dentinogenesis. BSP may serve as a nucleator of hydroxyapatite crystal formation.
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