Effect of Caffeine Injection on Orthodontic Tooth Movement in Rats: An Experimental Study on Rats

Figure 4

The result of HE staining. Blood vessels and osteoclasts in (a) the negative control, (b) the positive control, (c) caffeine 25 mg/kg, (d) caffeine 50 mg/kg, and (e) caffeine 75 mg/kg. Scale bar: 50 µm.