Question

All of the following are the uses of EDTA, except:

• A. Dissolution of pulp
• B. Softening of dentin
• C. Removal of smear layer
• D. Chelation of calcium ions

Hint:

EDTA is primarily used in dentistry to clean and shape the root canal and remove the smear layer, not to dissolve pulp tissue.

Answer 1

The Correct Option is A

The question asks which of the given options is not a use of EDTA (Ethylenediaminetetraacetic Acid) in dentistry. EDTA is a commonly used agent in endodontics for its chelating properties. Let's evaluate the options one by one to determine the correct answer:

1. Dissolution of pulp: EDTA is not used for this purpose. Dissolution of pulp usually involves the use of sodium hypochlorite or other enzymatic agents. Therefore, this is the correct answer.
2. Softening of dentin: EDTA is used to soften dentin because it has the ability to remove the inorganic portion, mainly calcium salts, which contributes to softening.
3. Removal of smear layer: EDTA effectively removes the smear layer from the root canal walls, enhancing the penetration of root canal sealers and irrigants.
4. Chelation of calcium ions: One of the primary functions of EDTA is its ability to chelate (bind) calcium ions due to its multiple carboxylate groups which form complexes with metal ions.

Based on the evaluation of these options, "Dissolution of pulp" is not a typical use of EDTA in dentistry, making it the correct choice. The other options correctly identify uses of EDTA in endodontic procedures.