Accessory canals are formed through a process involving the destruction of the epithelial root sheath in the root apex regions. This destruction can result in the formation of gaps and slits in the canals. When these gaps and slits are invaded by blood vessels, they become accessory canals.
The formation of accessory canals starts with the destruction of the epithelial root sheath. This sheath is a layer of cells that surrounds the developing root and plays a role in its formation. However, in certain cases, this sheath may be damaged or destroyed, leading to the formation of gaps and slits in the root apex regions.
Once these gaps and slits are formed, blood vessels can invade the area. The blood vessels can enter the gaps and slits, leading to the formation of accessory canals. These canals are essentially pathways for the blood vessels to travel through the root.
It is important to note that the regions surrounding the blood vessels in the gaps and slits do not mineralize. This means that they do not undergo the normal process of hardening and becoming mineralized like the rest of the root structure. Instead, they remain as soft tissue, forming the walls of the accessory canals.
The formation of accessory canals can have implications for the overall structure and function of the tooth. They can provide additional pathways for blood vessels to supply nutrients and oxygen to the root, helping to support its health and vitality. However, they can also potentially create openings for bacteria or other contaminants to enter the root canal system, leading to infection or other complications.
Accessory canals are formed when the destruction of the epithelial root sheath in the root apex regions results in the formation of gaps and slits. When these gaps and slits are invaded by blood vessels, they become accessory canals. These canals provide additional pathways for blood vessels but do not mineralize like the surrounding root structure.