Questions and Answers
What is the definition of working length in endodontics?
The distance from the coronal reference point to the point at which canal preparation and obturation should terminate.
What is the purpose of prebending a file in endodontic procedures?
To limit the depth to which the canal filling may be placed.
What is the significance of determining the working length in endodontic treatment?
It determines the success of the treatment.
What is the average distance between the apical foramen and the apex in teeth?
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What happens if instrumentation in endodontic treatment is shorter than the apical constriction?
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Placing a sharp curve of nearly 45° near the apical end of file is a type of ______ file prebending
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The distance from a coronal reference point to the point at which canal preparation and obturation should terminate is known as the ______
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The distance between the apical foramen and the apex is $0.5$ mm in 18-25 y old, $0.7$ mm in 55+ y old. The distance between the tooth apex and the apical constriction is $1$ mm with a range of $0.1$ to $2.7$ mm. This distance is known as the ______
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The apical foramen deviates from the apex in 50-98% of the teeth. This deviation averages $0.3$ to $0.6$ mm but could be as much as $3$ mm. The distance between the apical foramen and the apex is also known as the ______
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The first step in cleaning and shaping is ______ determination
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