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Fig. 2 | BMC Oral Health

Fig. 2

From: New technique for detecting cracked teeth and evaluating the crack depth by contrast-enhanced cone beam computed tomography: an in vitro study

Fig. 2

The schematic and experimental model system used to infiltrate the contrast medium into the crack. A The crown of the cracked tooth is exposed with a rubber dam. B The closed glass jar and suction pump device are connected to provide negative pressure suction. C Preparation on the occlusal surface with ioversol solution (indicated with yellow); 1: Negative pressure was applied gradually until it reached − 0.08 MPa and it was maintained at this value for 1 min; 2: Subsequently, normal atmospheric pressure was restored

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