Advanced Dental Admission Test (ADAT)

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Prepare for the Advanced Dental Admission Test. Study with flashcards and multiple choice questions, with hints and explanations provided for each question. Strengthen your readiness for success!

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Which feature of MTA contributes to its high sealing ability?

Hydrophobic nature
High pH
Inert composition
Low viscosity

The correct answer is: High pH

The high sealing ability of MTA, or Mineral Trioxide Aggregate, is primarily attributed to its high pH. When MTA is mixed, it results in an alkaline pH typically around 12-13. This high pH not only fosters an environment that is conducive to the formation of hydroxyapatite, which aids in the sealing quality, but it also possesses antibacterial properties that help in the maintenance of the integrity of the sealing over time. The ability to create a strong alkaline environment is crucial in promoting tissue healing and preventing bacterial invasion, thus enhancing the overall sealing capability of MTA in dental procedures. While the hydrophobic nature and low viscosity of MTA may influence its performance in specific contexts, they do not directly correlate to the sealing capacity. Similarly, the inert composition of MTA reflects its biocompatibility and minimizes adverse reactions but does not significantly contribute to sealing ability like the high pH does.