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Table 7 Maximum force (Mean + SD) 2, 3, 4 or 6 weeks after fracture or surgery.

From: Effects of low power laser irradiation on bone healing in animals: a meta-analysis

Authors 2 week 3 week 4 week 6 week
    2 Joules/day
David et al. (1996) N/A N/A E 1630 ± 1020 * E 1880 ± 1080 *
    C 1340 ± 540 * C 2330 ± 1210 *
  N/A N/A E 1120 ± 900 ** E 1750 ± 1060 **
    C 1190 ± 570 ** C 2330 ± 1050 **
    4 Joules/day
  N/A N/A E 1110 ± 650 * E 2480 ± 1140*
    C 1510 ± 820 * C 2000 ± 680 *
  N/A N/A E 670 ± 680 ** E 1680 ± 1280 **
    C 1020 ± 890** C 2280 ± 140 **
Luger et al. (1998) N/A N/A E 74.4 ± 43.1* N/A
    C 46.5 ± 20.2*  
Tajali et al. (2003) E 28.82 ± 8.19** E 29.85 ± 5.50** E 36.82 ± 7.42** N/A
  C 24.44 ± 3.19** C 27.70 ± 5.32** C 27.79 ± 6.14**  
Teng et al. (2006) NA NA NA NA
  1. E = Experiment, C = Control; * Data refers to biomechanical evaluation in vertical plan; **Data refers to biomechanical evaluation in horizontal plan.