A prospective cross-over study to evaluate the effect of two different occlusal concepts on the masseter muscle activity in implant-retained mandibular overdentures

International Journal of Implant Dentistry

Table 3 Comparison between the different test foods according to RMS values of the EMG signals of right and left masseter muscles in canine guidance occlusion

	Silicon index (n = 12)	Peanut (n = 12)	Cake (n = 12)	^KW χ ²	p
Right
Min.–Max.	29.0–289.0	34.0–185.0	21.0–87.0
Mean ± SD	61.67 ± 72.14	55.08 ± 41.27	46.83 ± 20.70	0.501	0.778
Median	43.0	44.0	39.0
	p ₁ = 1.000, p ₂ = 0.488, p ₃ = 0.602
Left
Min.–Max.	11.0–150.0	24.0–126.0	29.0–143.0
Mean ± SD	68.75 ± 42.86	61.50 ± 26.21	54.75 ± 31.19	2.134	0.344
Median	69.0	62.0	51.50
	p ₁ = 0.225, p ₂ = 0.728, p ₃ = 0.202

^KW χ ² chi square for Kruskal-Wallis test, p ₁ p value for Mann-Whitney test for comparing between silicon index and cake, p ₂ p value for Mann-Whitney test for comparing between silicon index and peanut, p ₃ p value for Mann-Whitney test for comparing between cake and peanut
*Statistically significant at p ≤ 0.05