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Simon FIG. 2

The digital cast of the two siblings (green and blue) and the surface comparison (color map). The first row shows two maxillary first molars of the 22-year-old MZ pair (pair #3). The teeth have occlusal restorations resulting in increased deviation (red arrows). The second row shows two maxillary second molars of pair #3. These teeth have no restorations or abrasions. However, the occlusal surface morphology is quite different between siblings. The third row shows two maxillary first molars of 19-year-old MZ pairs (pair #1). There are no restorations, and the cusp shapes are very similar. However, a sign of abrasion can be seen in sibling A (blue), creating an increased deviation between scans (red arrows). The fourth row shows the palate of pair #3. Please note that the color range in the palatal is three times more than in the tooth map.