Table 3.

Characteristics of studies on shear wave elastography

Author	Device	Patients positioning	Study population	Elasticity values of the masseter muscle
Arda, 201 120	Supersonic with a linear-array transducer with a frequency range of 6–13 MHz (Aix-en-Provence)	Patient in a supine position	127 healthy volunteers	Total: 10.4 ± 3.7 kPa (range, 2–23) Males: 10.8 ± 3.9 kPa (4-20) Females: 10.3 ± 3.6 kPa (2-23)
Ariji, 201623	Logic E9 with a 9 MHz linear array transducer; the coupling agent with Young’s modulus of 40 kPa was used (GE Healthcare)	Patient in a supine position	30 healthy volunteers	At rest 42.82 ± 5.56 kPa At jaw clenching 53.86 ± 8.26 kPa
Badea, 201424	ACUSON S2000 with an 8–14 MHz linear transducer; ARFI mode (Siemens)	Patients in a supine position with the head half extended	25 healthy volunteers and 13 patients after radiotherapy	Central measurement – m/s Healthy at rest; right 1.87 ± 0.52 and left 1.6 ± 0.47 Healthy at contraction right 1.57 ± 0.54 and left 1.47 ± 0.53 Patients at rest; right 1.67 ± 0.6 and left 1.6 ± 0.34 Patients at contraction right 1.41 ± 0.52 and left 1.68 ± 0.9
Ewertsen, 201818	Logic E9 system with a 9 MHz linear array transducer (GE Healthcare)	Patient in a sitting position	10 healthy volunteers	2.45 ± 0.25 m/s
Herman, 201717	Supersonic with a compact linear array transducer SL 15–4 (4–15 MHz) (Aix-en-Provence)	Patient in a supine position	176 healthy volunteers	10.0 ± 4.3 kPa, median 9.85 kPa;
Joy, 201525	Supersonic with a with a frequency range of 4–15 MHz (Aix-en-Provence)	Cadavers in a supine position	Six cadavers	15.0 (95% CI: 6.3–35.5) kPa
Takashima, 201727	ACUSON S2001 with an 8–14 MHz linear transducer (Siemens)	Patient in a sitting position	26 females with TMD and 24 healthy females	TMD Ia = 1.96 m/s (12.5 kPa) TMD Ib = 2.00 m/s (13.0 kPa) Healthy females = 1.27 m/s (5.25 kPa)

TMD, temporomandibular disorders.