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mRNA expression levels of RANKL and OPG. (A) Comparison of mRNA expression of RANKL in tension/compression sides of the experimental teeth loaded with 4oz of force (P < 0.0001) and control teeth. (B) Comparison of mRNA expression of OPG in tension/compression sides of the experimental teeth loaded with 4oz and 7oz of force (P = 0.31) and control teeth.
