Table 1 Description of the measurements and intrarater reliability

Alignment

Assessment of tooth alignment. Incisal edges and lingual surfaces of maxillary anterior teeth, incisal edges and labial-incisal surfaces of mandibular anterior teeth, mesiodistal central grooves of posterior maxillary teeth and buccal cusps of posterior mandibular teeth should be in line.

0.995

Marginal ridges

Assessment of vertical positioning of posterior teeth. Marginal ridges of adjacent teeth should be at the same level.

0.845

Buccolingual inclination

Assessment of buccolingual inclination of posterior teeth. Upper and lower buccal and lingual cusps should be at the same height.

0.926

Occlusal contacts

Assessment of intercuspation of opposing teeth. The functioning cusps should be contacting the occlusal surfaces of opposing teeth.

0.973

Occlusal relationship

Assessment of anterior- posterior position of posterior teeth. The occlusion should be an Angle Class I relationship.

0.999

Overjet

Assessment of anterior-posterior relationship of anterior teeth and transverse relationship of posterior teeth. Anterior teeth should be in contact and posterior functioning cusps should be in the fossae of opposing teeth.

0.987

Interproximal contacts

Assessment of spacing within the dental arch. All teeth should be in contact with one another.

0.995

Total score

Sum of the of grading scores for the above parameters. Total score should be as low as possible.

0.997

Overbite

Measurement [mm] between two antagonistic incisors comprising the greatest vertical overlap. Overbite should be 1–2 mm.

0.991

A-P

Measurement [mm] of the discrepancy of the mesiobuccal cusp of the upper first molar in relation to the buccal central groove of the lower first molar. Anterior-posterior relation should be 0 mm.

0.999