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本研究对50例冠折恒前牙活髓切断术进行临床和X片观察。依据临床症状,牙髓电试反应,牙本质桥形成,根内和尖周病变以及牙根继续发育等标准评价。观察时间3～10年。长期观察结果表明,绝大多数患牙有硬组织桥形成和牙根继续发育,健康牙髓有很好的愈合潜力。然而,在牙根形成后2年可出现4种根内变化,其中管腔闭塞仅占4％。为避免管腔变化给修复带来的困难,选择适宜切髓部位和定期观察很重要。保存活髓牙齿,使牙根继续发育并形成正常尖周组织十分有意义。
In this study, 50 cases of crown anterior permanent pulp pulpotomy for clinical and X-ray observation. Based on clinical symptoms, endodontic reaction, dentin bridge formation, root and apical lesions and root development continue to evaluate other criteria. Observation time 3 to 10 years. Long-term observations show that the vast majority of teeth with hard tissue bridge formation and root development continue, healthy pulp has a good healing potential. However, four root changes occurred within 2 years after root formation, with lumen occlusion accounting for only 4%. In order to avoid the difficulty of the repair caused by the change of the lumen, it is very important to choose the proper site for cesarean section and observe regularly. It is very meaningful to preserve the vital teeth, make the roots continue to develop and form the normal apical tissues.