髓石是指发生在牙髓腔或根管内的结节性钙化组织,可呈形态不规则的透明黄色硬物,髓石发病率随年龄增长而增长,老年患者常多于年轻人。多生牙是超出牙齿正常数目之外的牙,多发于上颌中切牙之间,可造成牙齿移位、恒牙阻萌,影响患者的牙牙合和美观,甚至可能形成囊肿[1]。牙瘤是生长于颌骨内的良性牙源性肿瘤,生长缓慢,早期常因无症状而不易被发现。上述三种疾病同时并发者罕见,我们接诊个例,报道如下:病例报告 Myelolith refers to the occurrence of nodular calcification in the pulp cavity or root canal, irregular yellow transparent hard objects, the incidence of stone growth with age and growth, often more elderly patients than young people. Juvenile teeth are teeth that extend beyond the normal number of teeth and are found between the maxillary central incisors, which can cause tooth displacement, permanent teeth blocking, affecting the patient’s occlusion and appearance, and may even form cysts [1]. Tumors are benign odontogenic tumors that grow in the jaw. They grow slowly and are often undetected as early as asymptomatic. The three concurrent diseases are rare at the same time, we interviewed a case reported as follows: Case Report