International Licensing Examination (ILE) Practice Test

What is the purpose of a bite block during Open Jaw Impressions?

1. To ensure the jaw is closed

2. To keep the jaw apart during impression making

3. To stabilize the head during the impression

4. To enhance the acoustic properties of the impression

The correct answer is: To keep the jaw apart during impression making

The purpose of a bite block during Open Jaw Impressions is to keep the jaw apart during the impression-making process. By maintaining the jaw in an open position, the bite block facilitates a correct impression of the occlusal surfaces and soft tissues without the interference of the opposing dental structures. This is particularly crucial for capturing details and achieving accuracy in the final impression, as it allows a clear field without the potential for accidental closure that could distort the impression. In contrast, using a bite block to ensure the jaw is closed or stabilize the head would not align with the technique of Open Jaw Impressions, which specifically requires an open mouth to accurately record the buccal and lingual aspects of the dental arch. The idea of improving acoustic properties is irrelevant in this context as it does not pertain to the mechanical function of impression taking. Thus, focusing solely on the task of keeping the jaw apart is pivotal for achieving the desired results in this procedure.