Decalcifying Agents: Uses, Requirements, And Types

Decalcifying Agents: Uses, Requirements, And Types

Question 1. Decalcifying agents
Answer:

Uses:

• To study the structure of tooth and pulp calcification
• Evaluate the biological response of pulp to the restorative material

Requirements:

• Ensure complete removal of calcium
• Causes minimum damage to cells and tissues
• Causes nonimpairment to substantial staining
• Decalcifies at a reasonable speed

Agents used:

• EDTA
• 5% nitric acid
• Formalin nitric acid
• 5% trichloroacetic acid 10% formic acid

Question 2. Accessory canals
Answer:

• Accessory canals are canals seen anywhere along the root

Extend:

• Radicular pulp laterally to periodontal tissue
• Most numerous in the apical third of the root

Cause of formation:

• Premature loss of root sheath cells
• Presence of blood vessels in the area of dentin formation
• Hard tissue develops around blood vessels making a lateral canal from radicular pulp

Significance:

• Causes spread of infection from pulp to periodontal ligament and from periodontal ligament to pulp