Table 1 Mean %MVIC during crown preparation of all four first molars according to visual aids.

Muscle	Mean % MVIC				Overall p-value	Post-hoc
Muscle	Total	Naked eye (N)	Loupe (L)	Microscope (M)	Overall p-value	N vs. L	N vs. M	L vs. M
Rt. Upper trapezius	17.47 ± 14.31	22.47 ± 14.43^a	19.91 ± 15.98^I	10.03 ± 8.27^α	< 0.0001	0.5476	< 0.0001	< 0.0001
Lt. Upper trapezius	12.74 ± 11.32	17.48 ± 14.02^a,b	12.26 ± 9.94^II	8.47 ± 7.07^α,β	< 0.0001	0.0025	< 0.0001	0.045
Rt. SCM	8.67 ± 7.20	11.75 ± 9.45^c	8.37 ± 6.37^II	5.91 ± 3.07^β	< 0.0001	0.002	< 0.0001	0.0386
Lt. SCM	10.02 ± 7.70	13.60 ± 10.19^b,c	9.33 ± 6.52^II	7.15 ± 3.34^α,β	< 0.0001	0.0002	< 0.0001	0.1136
Rt. Erector spinae	21.75 ± 11.79	25.74 ± 11.81^a	23.90 ± 11.83^I	15.61 ± 9.04^γ	< 0.0001	0.7363	< 0.0001	< 0.0001
Lt. Erector spinae	21.53 ± 13.23	24.82 ± 13.41^a	23.07 ± 9.67^I	16.71 ± 14.79^γ	< 0.0001	> 0.9999	< 0.0001	0.002
Rt. Ant. deltoid	8.34 ± 8.12	9.65 ± 8.54^c	8.68 ± 8.53^II	6.68 ± 7.00^α,β	0.0349	> 0.9999	0.0333	0.2605
Lt. Ant. deltoid	3.16 ± 2.74	3.57 ± 3.50^d	3.55 ± 2.81^III	2.36 ± 1.24^δ	0.002	> 0.9999	0.006	0.0072

Values are mean ± SD. The data is collected from the four surfaces of 4 teeth (#16, #26, #36, and #46) from six participants. Different alphabets indicate significant differences in mean %MVIC during crown preparation with the naked eye. Different Roman numbers indicate significant differences in mean %MVIC during crown preparation using a loupe. Different Greek alphabets indicate significant difference in mean %MVIC during crown preparation using a microscope. SCM, sternocleidomastoid; MVIC, maximum voluntary isometric contractions.

Quick links

Search