1156 exhibiting one of the deepest dentin cracks (rectangle) induced across treatment groups. Amira 3-dimensional software (Version 6.7 ThermoFisher Scientific) was used to superimpose OCT scans and analyze the dimensions of crack propagation or new crack formation for each treatment.įigure 4 A. Posttreatment OCT scans were collected to evaluate the initial crack treatment. Each specimen underwent 1 of the 5 treatments to remove the initial dentin crack. Cross-sectional and occlusal pretreatment optical coherence tomography (OCT) were collected. The specimens were scanned using Dental SS-OCT (Yoshida). A flame bur was used to create a mesiodistal guide notch. A diamond disk with a cutting head of 140 μm was used to simulate a coronal crack approximately 0.7 mm in depth. ![]() Specimens were decoronated with diamond saw and occlusal and peripheral enamel was removed with a wheel-shaped diamond bur and electric handpiece at 150,000 rpm with water. Forty posterior teeth randomly assigned to 1 of 5 treatment groups.
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