apical foramen การใช้

• Ideally this debridement would terminate exactly at the apical foramen.
• Most infections spread through the apical foramen from the pulp to periapical tissue.
• Apical foramen is the opening of the radicular pulp into the periapical connective tissue.
• The radicular portion is continuous with the periapical tissues through the apical foramen or foramina.
• When the tool tip touches the top of the tooth, the instrument signals that the apical foramen is reached.
• Cementum on the root ends surrounds the apical foramen and may extend slightly onto the inner wall of the pulp canal.
• All of these procedures involve frequent irrigation and recapitulation with the master apical file, a small file hat reaches the apical foramen.
• If more than one foramen is present on each root, the largest one is designated as the apical foramen and the rest are considered accessory foramina.
• This may be caused iatrogenically by binding or excessive pressure on the irrigant syringe or it may occur if the tooth has an unusually large apical foramen.
• In reality determining the exact position of the apical foramen is problematic, requiring radiography and / or use of an electronic apex locator to produce a refined estimate.
• In anatomy the "'apical foramen "'is the opening at the apex of the root of a tooth, through which the nerve and blood vessels that supply the dental pulp pass.
• It is suggested that insertion of file or other root canal instrument beyond the apical foramen ( for 1-2mm ) produces transitory acute inflammation which may destroy epithelial lining of radicular cyst and convert it into granuloma.