融合牙及第四磨牙的病例时有报告,然而二个概念同存并提,即在第四磨牙的基础上发生的融合牙实为罕见。笔者近期遇到了这一特殊症例,现报告如下:郭某某,男,19岁,工人。因左上后牙自发性疼痛二月而就诊。自述二月来左上后牙反复自发疼痛,口服抗菌素无效,近日来疼痛加剧,夜不能 Fusion teeth and the fourth molar cases have been reported, however, the two concepts with the same memory, that is based on the fourth molar on the basis of the rare fusion teeth. I recently encountered this particular case, are as follows: Kwak Moumou, male, 19 years old, workers. Due to the left upper back teeth in February for spontaneous pain. Readme February to the left upper teeth after repeated spontaneous pain, oral antibiotics ineffective, increased pain in recent days, the night can not