Supplementary table 2



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Supplementary table 2. Dental casts measurements

ARCH LENGTH (AL)

Distance through the general alignment of contact points. From the distal contact surface of first molar to the distal contact surface of the contralateral first molar. If the first permanent molars were missing, second molars were used.*

TOTAL SPACE REQUIRED (TSR)

Sum of each mesiodistal tooth width from one first molar to contralateral first molar. If the first permanent molars were missing, second molars were used.*

DISCREPANCY

(D)


Determined by subtracting the TSR from the space available AL. A negative result indicated space deficiency and a positive result indicated space surplus.*

OVERJET

(OJ)


Horizontal projection of the midpoint of the labial surface of the maxillary teeth beyond the labial surface of the mandibular teeth, measured parallel to the occlusal plane at the level of the edge of the maxillary incisor.

OVERBITE (OB)

Vertical overlapping of the edge of the maxillary teeth over buccal surface of the mandibular teeth measured perpendicular to the occlusal plane.

INTERMOLAR ARCH WIDTH (AW)

Width between the mesio-lingual cusp of the first molar to the mesio-lingual cusp of the contralateral molar. If the first molars were missing, it was considered missing data.*

INTERCANINE ARCH WIDTH (AW)

Width between the centers of the cuspid of the permanent canine to the contralateral canine. If the canines were missing, it was considered missing data.*

CURVE OF SPEE (CS)

Perpendicular distance from the buccal cusp of each mandibular premolar and molar to a plane (CS plane) formed by three points: the tip of the homolateral canine, the distobuccal cusp of the homolateral second molar and the distobuccal cusp of the contralateral second molar. We recorded the CS as positive if the cusps were below the CS plane and negative if the cusps were above the CS plane.§

MAXILLARY TEETH INCLINATION

Perpendicular distance from each buccal cusps of each maxillary molar, premolar and canine to a reference plane formed by three points:

  • Upper first and second molar reference plane passed through the intersection of the palatal developmental groove of the first and second molar with the gingival margin for each side and the central point of the interincisal papilla.

  • Upper first and second premolar reference plane passed through the intersection of the palatal cusp axis of the first and second premolar with the gingival margin for each side and the central point of the interincisal papilla.

  • Upper canine reference plane passed through the intersection of the cusp axis of the canine with the gingival margin for each side and the central point of the interincisal papilla.§

MANDIBULAR TEETH INCLINATION

Perpendicular distance from each buccal cusps of each mandibular molar, premolar and canine to a reference plane formed by three points:

  • Lower first and second molar reference plane passed through the intersection of the lingual developmental groove of the first and second molar with the gingival margin for each side and the central point of the interdental papilla between the mandibular incisors.

  • Lower first and second premolar reference plane passed through the intersection of the lingual cusp axis of the first and second premolar with the gingival margin for each side and the central point of the interdental papilla between the mandibular incisors.

  • Lower canine reference plane passed through the intersection of the cusp axis of the canine with the gingival margin for each side and the central point of the interdental papilla between the mandibular incisors.§

*The measure was done in maxillary and in mandibular arch.

The measure was done for right central incisor.

§The measure was done for right and left side.


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