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. 2013 Apr 24;8(4):e62263. doi: 10.1371/journal.pone.0062263

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© 2013 Benazzi et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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A, mesiolingual view during maximum intercuspation between the lower right premolars and first molar (RP₁-RM₁) and the upper right premolars (RP¹-RP²). B, the RP¹-RP² are transparent to better show the collision (red areas) on the occlusal surface of the RP₂. See also Video S4. B = buccal; D = distal; L = lingual; M = mesial.