California Registered Dental Assistant (RDA) Written Practice Exam

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Question: 1 / 400

A correctly fitting impression tray has sufficient depth to leave a minimum occlusal/incisal clearance of how much?

1.5mm

2.0mm

The minimum recommended occlusal/incisal clearance for a correctly fitting impression tray is 2.0mm. This is important for allowing enough space for impression material to surround and accurately capture the teeth and their details, while also avoiding any interference with occlusion or sharp impressions. Options A, C, and D are incorrect as they do not meet the recommended minimum clearance and may result in inaccurate impressions.

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2.5mm

3.0mm

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