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. 2024 Aug 27;24:1005. doi: 10.1186/s12903-024-04766-w

Fig. 1.

Fig. 1

Selection of ROI on a panoramic radiograph, (a): The center of the ramus rising above the mandibular foramen, (b): The area between the apical level of the mandibular molar and the upper border of the mandibular canal, (c): The missing tooth region; the apical third of the mesial side of the erupting or fully erupted permanent mandibular first molar