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FEA mesh: (A)—one of the nine complete models (320 × 320 × 320 mm), (B)—second lower right premolar model (26 mm height) with intact periodontium, (C)—4 mm loss bone loss, (D)—8 mm bone loss, (E)—premolar (26 mm height), orthodontic loads vectors: (F)—intrusion, (G)—extrusion, (H)—translation, (I)—rotation, (J)—tipping, (K)—intact PDL (19.2 mm height).
