Temperature changes in deep and superficial muscles under microwave exposure. The sensor was inserted over the titanium alloy plate into deep muscles (5 mm above the middle hole) and superficial muscles (30 mm above the middle hole). Transient temperature variations were assessed by t-test. *P < 0.05 vs. control group in deep muscles; #
P < 0.05 vs. control group in superficial muscles. D-control group: deep muscles control group; D-treatment group: deep muscles treatment group; S-control group: superficial muscles control group; S- treatment group: superficial muscles treatment group.