Fig. 2

PD induced alveolar bone loss that was reversed by LPP2A-Ale +/− MSCs. a Representative two-dimensional sagittal images of the right molars in each group. Blue double-headed arrows illustrate root length. Green double-headed arrows indicate the distance between the cement enamel junction (CEJ) and the alveolar bone crest (ABC). Green curved lines highlight the region of interest for the three-dimensional evaluation of alveolar bone volume. b Representative three-dimensional sagittal images of the right molars in each group. c Quantitative measurements of alveolar bone volume and the vertical bone remaining between M1-M2 and M2-M3. * p < 0.05 for comparisons of the indicated groups