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将２０只青春期雄性ＳＤ大鼠随机等量分为对照组，脉冲电磁场（ＰＥＭＦ）组，戴功能矫治器（ＦＡ）组及二者共同作用（ＰＥＭＦ＋ＦＡ）组，研究脉冲电磁场和功能矫治器对大鼠下颌髁突胰岛素样生长因子Ｉ（ＩＧＦ—Ｉ）表达变化。经过１０天的实验，结果发现ＰＥＭＦ和功能矫治器都可显著性增加髁突软骨细胞的ＩＧＦ—Ｉ表达，提示二者具有协同作用，为临床联合使用ＰＥＭＦ和ＦＡ进行下颌骨的矫形治疗提供了实验依据。
20 adolescent male Sprague-Dawley rats were equally divided into control group, PEMF group, FA group and PEMF + FA group. The effects of pulsed electromagnetic field and functional appliance on the performance of large Changes of Insulin - like Growth Factor I (IGF - I) Expression in Rat Mandibular Condyle. After 10 days of experiment, it was found that both PEMF and functional appliance can significantly increase the expression of IGF-I in condylar chondrocytes, suggesting that the two have synergistic effects and provide the clinical treatment of orthopedic mandibular joint with PEMF and FA Experimental basis.