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Table 2 MRI evaluation: sagittal concentricity - comparison of mean values between the groups

From: Comparison of temporomandibular joint changes in Twin Block and Bionator appliance therapy: a magnetic resonance imaging study

Sagittal concentricity (percentage of condylar displacement) Control group (C)n?=?10 Twin Block (T)n?=?10 Bionator (B)n?=?10 Comparison
X? ?SD (%) X? ?SD (%) X? ?SD (%) C and T C and B T and B
Pretreatment 6.9? ?5.1 3.7? ?2.3 7.7? ?4.4 NS NS NS
After 6 months 6.7? ?4.9 18.7? ?10.3 19.1? ?11.5 S S NS
Difference ?0.17? ?0.2 15.01? ?7.9 11.38? ?7.1 HS HS NS