Fig. 3From: Long-term effect of simulated five years professional mechanical biofilm removal on the luting gap of ceramic restorationsImage of a luting gap width measurement. Example of width measurement of the luting gap: Visually, the luting gap can be clearly distinguished from the ceramic surfaces. In this case, the width of the luting gap (indicated by the yellow arrow) is 83.8 µm. The height difference between the adjacent ceramic surfaces (marked by the two vertical yellow lines) is 4.8 µmBack to article page