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. 2020 Mar;59(1):3–9. doi: 10.20471/acc.2020.59.01.01

Table 2. Most commonly used retention appliance according to type of malocclusion (prevalence (P) n (%) and years of clinical experience (E) of orthodontists (median (interquartile range)).

Maxilla Mandible
Bonded Removable Combination Bonded Removable Combination
Extraction P 8 (8.7%)a
E 2.5 (0.25-8.5)
33 (35.9%)b
9 (3-19.5)
51 (55.4%)b
7 (3-14)
17 (18.5%)a
9 (4.5-17.5)
30 (32.6%)ab
4.5 (0.75-21)
45 (48.9%)b
7 (3-10.5)
Spacing P 23 (25%)a
E 8 (1-19)
25 (27.2%)ab
9 (1-21)
44 (47.8%)b
5 (4-11.5)
32 (34.8%)ab
8.5 (4-19)
20 (21.7%)a
7 (0.25-23.75)
40 (43.5%)b
5 (3.25-9)
Frontal expansion P 5 (5.4%)a
E 9 (5-14)
54 (58.7%)b
7.5 (1-17.25)
33 (35.9%)b
7 (4-16.5)
16 (17.4%)a
10.5 (5.5-18.25)
40 (43.5%)b
7.5 (1.25-17)
36 (39.1%)b
4.5 (3-9.75)
Lateral expansion P 1 (1.1%)a
E 1
60 (65.2%)b
6.5 (1-15.5)
31 (33.7%)c
7 (4-13)
8 (8.7%)a
11.5 (7.25-18.25)
55 (59.8%)b
5 (1-17)
29 (31.5%)c
7 (3.5-13)
Impacted canines P 15 (16.3%)a
E 9 (2-20)
44 (47.8%)b
7 (1-15.5)
33 (35.9%)b
7 (4-13)
24 (26.1%)
8.5 (5.5-19)
41 (44.6%)
5 (1-18.5)
27 (29.3%)
5 (3-9)
Rotated teeth P 20 (21.7%)a
E 9.5 (1-19.75)ab
19 (20.7%)a
14 (5-26)b
53 (57.6%)b
5 (3-9.5)a
31 (33.7%)ab
8 (2-19)ab
15 (16.3%)a
19 (4-27)b
46 (50%)b
2.75 (4-9)a
Open bite P 18 (19.6%)a
E 8.5 (4-17.5)
31 (33.7%)ab
9 (1-23)
43 (46.7%)b
5 (3-12)
27 (29.3%)
9 (5-19)
23 (25%)
3 (1-24)
42 (45.7%)
6 (3-12.5)

*values that share the same superscript letters in each jaw do not differ significantly at p<0.05 according to χ2-test for prevalence (P) and Kruskal-Wallis and Mann-Whitney test with Bonferroni correction for years of clinical experience (E).