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Progress in Orthodontics

Table 3 Comparison of matching percentage of pre-treatment and post-retention radicular shells (T0–T1 superimposition) for each tooth investigated

From: External root resorption (ERR) and rapid maxillary expansion (RME) at post-retention stage: a comparison between tooth-borne and bone-borne RME

  

T0–T1 matching (%)

  

TB group

 

BB group

  

Teeth

n

Mean

SD

p value*

Mean

SD

p value*

p value**

P1 (a)

20

92.83 (c)

2.65

p < 0.05

96.51 (c)

2.53

p < 0.05

p < 0.05

P2 (b)

20

93.27 (c)

3.11

97.8 (c)

2.01

p < 0.05

M1 (c)

20

89.33 (a, b)

4.51

93.04 (a, b)

3.40

p < 0.05

  1. P1 first premolar; P2 second premolar; M1 first molar; n number of teeth; SD standard deviation
  2. p value* based on one-way analysis of Variance (ANOVA) for intra-group comparisons (different teeth) and set at p < 0.05
  3. p value** for inter-group comparisons, based on independent Student’s t test and set at p < 0.05
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