highly significantp < 0.01
The mean ± SD of pain at 72 h for Group I was 0.84 ± 0.746 (0.53–1.15), Group II 0.32 ± 0.476(0.12–0.52), Group III 0.16 ± 0.374 (0.01–0.31) and for group IV 0.64 ± 0.490(0.44–0.84) and by Kruskal-Wallis test the difference of pain intensity between four groups were highly significant p < 0.01.