Fig. 4From: The optimal orthodontic displacement of clear aligner for mild, moderate and severe periodontal conditions: an in vitro study in a periodontally compromised individual using the finite element modelThe stress values of root apex in three periodontal conditions. a The stress values of the lower anterior teeth under three different periodontal conditions with axial inclination 90°. b The stress values of the lower anterior teeth under three different periodontal conditions with axial inclination 100°Back to article page