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Gene expression of chondrocyte maturation markers in female C57BL/6 mice exposed to 0-0.5 N of forced mouth opening. Real-time PCR analysis was performed for gene expressions of Pthrp, Sox9, Col2a1, and Col10a1 from the mandibular condylar head. Points are the mean ± SE for n = 8 for each group. *Significant difference between forced mouth opening and control groups (P < 0.05).
