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. 2014 Sep 26;15(1):63. doi: 10.1186/1129-2377-15-63

Table 4.

Comparison of the two techniques used for obtaining masseter biopsies from healthy volunteers

	Microbiopsies (n = 18)	Traditional biopsies (n = 10)
Mean weight of each muscle section	19.8 (±2.5) mg***	58.4 (±9.6) mg
Mean volume of each muscle section	13.0 (±1.6) mm³***	64.4 (±9.9) mm³
Surrounding tissues	No	Yes
Type of tissue		Parotid gland (20%)
Type of tissue		Fat cells (30%)
Adequate muscle section	100%	100%
Number of PGP 9.5 positive fibers per section	8.2 ± 1.2*	2.7 ± 0.2
Area of wound	1 (±0.04) mm²***	10 (±0.7) mm²
Post-surgical discomfort	3 (±1) days	8 (±2) days
Type of discomfort	3 (±1) days	8 (±2) days
	Palpatory tenderness over the belly of the masseter (100%)	Palpatory tenderness over the belly of the masseter muscle (100%)
	Bleeding (6%)	Limited jaw function (10%)
		Chewing difficulties (50%)
		Discomfort from sutures (100%)
		Extra visit to remove sutures (100%)

Differences are presented as mean (±SD) values.

*P < .05, unpaired t-test, ***P < .001, unpaired t-test.