Comparison of students' measurements and standard values by the digital technology and traditional method.

SNA: the angle between the sella-nasion plane and the nasion-subspinale plane; SNB: the angle between sella-nasion plane and the nasion-supramental plane; ANB: the angle between the nasion-subspinale plane and the nasion-supramental plane; NP-FH: the posterior-inferior angle between the facial plane and the Frankfort horizontal plane; NA-PA: the angle between the nasion-subspinale plane and the pogonion-subspinale plane; U1-NA (mm): the distance from the upper central incisor tip to the nasion-subspinale plane; U1-NA: the angle between the upper central incisor and the nasion-subspinale plane; L1-NB (mm): the distance from the lower central incisor tip to the nasion-supramental plane; L1-NB: the angle between the lower central incisor and the nasion-supramental plane; U1-L1: the angle between the upper central incisor and the lower central incisor; Y axis angle: the anterior-inferior angle between the Frankfort horizontal plane and the sella-pogonion plane; Po-NB (mm): the distance from the pogonion point to the nasion-supramental plane; FMA: the angle between the Frankfort horizontal plane and the mandibular plane; FMIA: the angle between the Frankfort horizontal plane and the long axis of the lower central incisor; IMPA: the angle between the long axis of the lower central incisor and the mandibular plane.