乳磨牙邻接点破坏可引起垂直性食物嵌塞而导致牙周炎,严重时可致根分叉区病变或窦道形成,现报告二病例如下: 病例一:75持续性肿胀痛半月余,药物可缓解,检查见患牙Ⅰ°松动,远中合面修复物松动,龈乳头充血水肿,颊侧根尖区牙槽粘膜处有一窦口,有脓溢出,探窦道可至根分叉,牙髓活力试验阴性。初诊为75继发龋,慢性尖周炎伴窦道形成,拟作根管治疗术,去除充填物时意外露髓,有活力,X线片示:75根分叉和尖周有稀疏区,最后诊断为75远中合面深龋,牙周炎、根分叉病变伴 Rupture of adjacent molars can cause vertical impaction of food caused by periodontitis, severe root deformity can cause lesions or sinus formation, are reported two cases are as follows: Case 1: 75 persistent swelling pain more than half a month, the drug Can be alleviated, check see the teeth Ⅰ ° loosening, distal joint repair loose, gingival papilla congestion and edema, buccal apical alveolar mucosa at an ostium, purulent overflow, sinus path to the root bifurcation, teeth Pith vitality test negative. Initial diagnosis of 75 secondary caries, chronic periapical sinus with the formation, intended for endodontic treatment, remove the fillings accidental exposed pulp, vitality, X-ray showed: 75 bifurcation and apical sparse area, and finally Diagnosis of 75 far in the face of deep caries, periodontitis, root bifurcation with