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. Author manuscript; available in PMC: 2020 Mar 1.
Published in final edited form as: Trends Mol Med. 2019 Jan 22;25(3):241–256. doi: 10.1016/j.molmed.2018.12.007

Figure 2: Internal derangement of the TMJ disc.

Figure 2:

(A) A healthy closed jaw position is shown. (B) The most common type of internal derangement is shown, where the disc is displaced anteriorly. Progression of the joint in this configuration often causes (C) disc thinning and (D) eventual disc perforation.