Correction to: Oral Radiology https://doi.org/10.1007/s11282-022-00615-0

  1. 1.

    In the original publication of the article, the paragraph of “Validity of the new classification system” in “Materials and methods” section is repeated twice. The duplicate paragraph should be deleted.

  2. 2.

    The data in the Fig. 5 should be accurate to one decimal place. Also, the explanatory text of Fig. 5 is added as follow.

Fig. 5 
figure 5

Observers feeling toward two classification systems. ***P < 0.001

  1. 3.

    The data of enrolled patients in first paragraph of the “Results” section is inconsistent with the data in Table 2. The correction is as follow:

90 patients (72 female and 18 male) with a total number of 180 joints were included in this study. The patient ranged in age from 18 to 63 years, with a mean age of 32.67 ± 12.78. Sixty-three discs were classified as biconcave (63 discs, 35.0%), which was the most frequent shape in Murakami’s classification system, followed by folded disc (41 discs, 22.78%). 32 discs were bi-planar (17.78%), 31 discs were hemi-concave (17.22%) and 13 discs were biconvex (7.22%).