Skip to main content

Table 2 Differences between Post-treatment and Post-retention Arch Dimensions (mm) of SL and CL group

From: Stability of treatment with self-ligating brackets and conventional brackets in adolescents: a long-term follow-up retrospective study

Variable SL group Cl group P
Mean SD Mean SD
Arch length Max
T(0)-T(P) 1.68 1.34 1.23 1.45 0.23
T(2)-T(0) -2.09 1.21 -1.99 1.35 0.16
T(5)-T(2) -0.71 0.35 -0.93 0.23 0.45
Arch length Md
T(0)-T(P) 2.31 1.56 1.98 1.76 0.36
T(2)-T(0) -1.23 0.83 -1.29 0.79 0.48
T(5)-T(2) -1.08 0.79 -1.10 0.86 0.38
Inter-canine width Max
T(0)-T(P) 1.89 1.23 1.86 1.36 0.47
T(2)-T(0) -2.79 1.45 -2.61 1.21 0.26
T(5)-T(2) -0.34 0.78 -0.31 0.67 0.56
Inter-canine width Md
T(0)-T(P) 0.68 1.46 0.56 1.56 0.35
T(2)-T(0) -2.19 1.39 -1.98 1.36 0.47
T(5)-T(2) -0.24 0.36 -0.54 0.52 0.12
Inter-molar width Max
T(0)-T(P) 2.36 1.20 1.12 0.87 *
T(2)-T(0) -2.13 1.35 -2.03 1.52 0.34
T(5)-T(2) -0.78 0.32 -0.76 0.36 0.21
Inter-molar width Md
T(0)-T(P) 2.14 1.56 2.06 1.68 0.32
T(2)-T(0) -2.68 1.26 -2.55 1.36 0.26
T(5)-T(2) -1.23 1.32 -1.34 1.36 0.18
  1. Max indicates maxillary; Md indicates mandibular; T(P) = pretreatment; T(0) = post-treatment; T(2) = 2 years post-retention; T(5) = more than 5 years post-retention; P > 0.05 indicates no statistically significant change.