Research Article

Force-Induced Nitric Oxide Promotes Osteogenic Activity during Orthodontic Tooth Movement in Mice

Figure 2

Force-induced NO regulated the OTM process. (a–d) The distance between the upper 1st molar and 2nd molar after 7 d force application was measured by a stereomicroscope (a) and micro-CT (b, d). Inhibition of NOS by L-NMMA injection decreases the subsequent OTM; upregulated NO level by L-arginine injections promotes OTM, (c) HE staining of the periodontal ligament of the distal root of the 1st molar, which is the tension side. L-NMMA injection decreases the subsequent OTM; L-arginine injections promote OTM, . AB: alveolar bone; R: root, . and . Bars and error bars show mean and standard error.