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. 2017 Sep 8;12(9):e0184495. doi: 10.1371/journal.pone.0184495

Fig 5.

Fig 5

(A) Manual palpation analysis. (a, b) Uncoated PEEK. Bone–implant gap was observed after applying extension force (white arrowheads). (c, d) TiO2-coated PEEK. No bone–implant gap after extension force. (B) Fusion rate of the PEEK implants based on the manual palpation analysis.