Question

In which of the following conditions is the use of thermoplasticized obturation technique contraindicated?

• A. Open apex
• B. Presence of internal resorption
• C. C-shaped canal
• D. During backfilling procedures

Hint:

Thermoplasticized gutta-percha needs a firm apical stopOpen apex cases require apexification before obturation.

Answer 1

The Correct Option is A

The question addresses the contraindications for using the thermoplasticized obturation technique in endodontic procedures. Let's analyze each option to understand why the technique is contraindicated for certain conditions:

1. Open apex: In cases of teeth with an open apex, achieving a proper seal is challenging with thermoplasticized obturators. The absence of a natural apical stop can lead to extrusion of filling material beyond the apex, thus making thermoplasticized obturation contraindicated. This option is correct.
2. Presence of internal resorption: Thermoplasticized obturation can be beneficial in cases of internal resorption because the material can flow into irregular spaces, providing a satisfactory seal. Therefore, internal resorption is not a contraindication.
3. C-shaped canal: This type of canal configuration involves complex anatomy and may benefit from the flow of thermoplasticized materials to adequately fill the space. Thus, C-shaped canals are not a contraindication.
4. During backfilling procedures: Thermoplasticized techniques are often used during backfilling after placing a master cone with a cold lateral condensation or carrier-based obturator as a first step in obturation, so this is not a contraindication.

Based on the explanations above, the correct answer is Open apex.