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Table 4 Maximum retrusion on Radiograph vs George Gauge

From: Antero-posterior mandibular position at different vertical levels for mandibular advancing device design

  Vertical opening N Min Max Mean SD
Radiograph 2 mm 52 −9,28 −1,54 −4.87 1.557
5 mm 52 −10,63 −2,96 −6.07 1.570
8 mm 52 −12,09 −4,23 −7.36 1.610
11 mm 52 −13,66 −5,64 −8.76 1.667
George Gauge 2 mm 47 −8,50 −3,00 −5.48 1.339
5 mm 52 −9,00 −3,00 −5.45 1.311
8 mm 52 −9,00 − 3,00 −6.27 1.293
11 mm 52 −10,00 −3,00 −6.10 1.704
   Paired Samples Correlations Paired Differences
   Correlation Sig. Mean SD Sig. (2-tailed)
Radiograph & George Gauge 2 mm 0.603 0.000 1.26465 0.18447 0.026
5 mm 0.565 0.000 1.35309 0.18586 0.003
8 mm 0.490 0.000 1.51619 0.21231 0.000
11 mm 0.349 0.011 1.99586 0.27678 0.000
  1. N Number of patients
  2. SD Standard Deviation
  3. 5 patients had overbite of less than 2 mm which didn’t allow to use the fork of 2 m