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Progress in Orthodontics
Fig. 2 | Progress in Orthodontics

Fig. 2

From: Three-dimensional assessment of periodontal support of lower incisors for skeletal Class II malocclusion undergoing presurgical orthodontic treatment with different vertical skeletal patterns

Fig. 2

2D measurements of alveolar bone around LCIs and tooth movement. A, Measurements of RL, ABT at the apex level and middle root level, and VBLs on the labial and lingual sides in the sagittal slice. B, Measurements of VBLs on the mesial and distal sides in the coronal slice. C, Reference lines and measurements of LCI movement. Reference lines: SRP, sagittal reference plane, a horizontal plane angulated 7° clockwise to the sella–nasion plane passing through the sella; VRP, vertical reference plane, plane perpendicular to the SRP passing through the sella. D, ΔS-edge, movement distance of the incisal edge along the sagittal reference plane (SRP); ΔS-apex, movement distance of the root apex along the sagittal reference plane (SRP); ΔV-edge, movement distance of the incisal edge along the vertical reference plane (VRP); ΔV-apex, movement distance of the root apex along the vertical reference plane (VRP); ΔAOL, the angles of the long axes between T1 and T2

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