CONCLUSION: The results indicated that Shh signaling pathway is critical for the odontoblast and ameloblast cytodifferentiation and cusp formation. PURPOSE: The Shh signaling pathway plays a critical role in tooth development.
Conclusion: The differential microvascular density within frist visual area, which accords with its function and action, provides morphological foundation for cytodifferentiation and functional perfection of visual cortex before the infant macula flava vision development.