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Table 3 Measurement of root angulation, crown shape, distance from ICP to ABC and IPR

From: The incidence and severity of open gingival embrasures in adults treated with clear aligners and fixed appliances: a retrospective cohort study

Measurement (Mean ± SD)

Maxilla

Mandible

Clear aligners

Fixed appliances

P value

Clear aligners

Fixed appliances

P value

Root angulation, degrees

0.01 ± 3.46

0.17 ± 3.26

0.137

0.51 ± 3.49

0.26 ± 4.30

0.655

Crown morphology

0.79 ± 0.07

0.80 ± 0.06

0.111

0.68 ± 0.07

0.70 ± 0.06

0.067

Distance from ICP to ABC, mm

5.09 ± 0.14

5.05 ± 0.35

0.256

4.97 ± 0.19

4.92 ± 0.20

0.089

IPR in central incisors, mm

0.47 ± 0.03

0.45 ± 0.04

0.099

0.43 ± 0.02

0.41 ± 0.01

0.079

  1. Independent t-tests were used to compare posttreatment variables between the clear aligner and fixed appliance group. The negative value of root angulation indicated convergent roots and a ratio near 1 indicated a squarer crown form
  2. SD Standard deviation
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Head & Face Medicine

ISSN: 1746-160X

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