HOSA Dental Terminology Practice

When would an auto matrix typically be used in a dental procedure?

1. When preparing a cavity

2. When there is significant tooth structure

3. When tooth structure is minimal

4. When performing routine cleanings

The correct answer is: When tooth structure is minimal

An auto matrix is typically used when there is minimal tooth structure remaining. This situation often arises in restorative dentistry, particularly when a cavity is large or the original tooth structure has been significantly compromised. The primary purpose of the auto matrix is to provide support and a form for the restoration material, ensuring that it can be effectively molded and contoured to match the existing tooth anatomy. When tooth structure is minimal, the auto matrix helps to create a barrier that holds the restorative material in place during the setting process. This is crucial for achieving proper contours and interproximal contacts, which contribute to the overall function and aesthetics of the restored tooth. Choosing to use an auto matrix in these instances enhances the quality and success of the dental procedure. In contrast, scenarios involving significant tooth structure or routine cleanings do not typically require the use of an auto matrix, as there is enough natural tooth structure to provide necessary support for restorations or these procedures do not involve restorations at all.