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

Step 1: Understanding Thermoplasticized Obturation.
Thermoplasticized obturation techniques use heated gutta-percha to achieve three-dimensional filling of the root canal systemIt provides excellent adaptation to canal irregularities and lateral canals
Step 2: Importance of Apical Control.
This technique requires a well-defined apical stop to prevent extrusion of gutta-perchaIf the apex is open (immature tooth or resorbed apex), there is no apical constriction to confine the material
Step 3: Evaluation of Options.
(A) Open apex — Contraindicated because heated gutta-percha can easily extrude beyond the apex
(B) Internal resorption — Thermoplasticized technique is actually advantageous as it adapts well to irregular defects
(C) C-shaped canal — Beneficial because it fills complex anatomy effectively
(D) Backfilling procedures — This technique is commonly used during backfilling
Step 4: Conclusion.
Therefore, thermoplasticized obturation is contraindicated in cases with an open apex