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Table 2 Comparison of percentage of external root resorption (ERR) between anterior teeth and posterior teeth

From: Three-dimensional partitioning and quantification of orthodontic root resorption via automatic root extraction from cone-beam computed tomography

Groups

Sample Size

ERR, % Median (P25, P75)

Mann–Whitney U tes

Anterior teeth

Posterior teeth

Anterior teeth

Posterior teeth

P Value

I

213

246

6.71 (3.03, 12.08)

1.97 (-2.24, 7.92)

0.000*

II

212

244

6.75 (2.99, 15.79)

3.59 (0.26, 10.03)

0.000*

  1. *P< 0.05 indicates statistical significance
  2. Abbreviation. Group I (aged 10–15 year-old) and Group II (aged > 15 year-old); ERR: the decrease in root volume at posttreatment compared to pretreatment; T0: pretreatment, T1: posttreatment
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BMC Oral Health

ISSN: 1472-6831

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