Puttaravuttiporn P, et al. - During orthodontic treatment, the experts sought to evaluate changes in tooth mobility, alveolar bone, and receptor activator of nuclear factor kappa-B ligand (RANKL)/osteoprotegerin (OPG) in the gingival crevicular fluid (GCF) for regaining incisal function in the presence and absence of biting exercises. They found that bone thickness was significantly increased by the biting exercises, however, these exercises did not affect tooth mobility, bone height, or density. One month following treatment (T2), the RANKL/OPG ratio decreased and correlated with increased bone thickness.