Pancherz H, Anehus M
Acta Odontol Scand. 1978;36(5):309-16. doi: 10.3109/00016357809029081.
Masticatory function was investigated in nine patients with relapse and ten patients without relapse of overjet after activator treatment, Masticatory efficiency, evaluated by a chewing test, was related to the number of intermaxillary tooth contacts and the electromyographic (EMG) activity from the temporal and masseter muscles during chewing. The results of the investigation indicated that a reduced masticatory efficiency was connected with fewer intermaxillary tooth contacts and less EMG activity from the temporal and masseter muscles. In patients with relapse of overjet, masticatory efficiency and muscle activity was reduced in comparison with patients without relapse. The relationship between the number of tooth contacts and masticatory efficiency was poor in the relapse patients. Unstable occlusal conditions and atypical tongue function may be an explanation.
对9例前牙覆盖复发患者和10例激活器治疗后前牙覆盖未复发患者的咀嚼功能进行了研究。通过咀嚼测试评估的咀嚼效率与咀嚼过程中颌间牙齿接触的数量以及颞肌和咬肌的肌电图（EMG）活动有关。研究结果表明，咀嚼效率降低与颌间牙齿接触减少以及颞肌和咬肌的EMG活动减少有关。在前牙覆盖复发的患者中，与未复发的患者相比，咀嚼效率和肌肉活动降低。复发患者中牙齿接触数量与咀嚼效率之间的关系较差。不稳定的咬合状况和异常的舌功能可能是一个解释。
