Abstract: Objective  To compare the clinical effects of pulp revascularization and calcium hydroxide in the treatment of young permanent teeth with pulpotomy, and then  to explore the advantages of pulp revascularization in the treatment of young permanent teeth with unexpected pulp exposure.
Methods  Ninety-eight patients(98 teeth) from 7 to 16 years old who underwent pulpotomy of mandibular premolars were divided into two groups according to random number table method. The two groups included observation group(49 patients underwent pulp revascularization) and control group(49 patients underwent calcium hydroxide apexification). After 6 months of complete treatment, the clinical effects of two groups were compared and analyzed.
Results  The total effective rate of the observation group(95.92%) was significantly higher than that of the control group(69.39%). The incidence of adverse reactions of the observation group(8.16%) was lower than that of the control group (34.68%) with statistical significance(P＜0.05),and the thickness of the root canal wall(2.54±0.32) mm and the length of the teeth（21.50±1.70） mm in the observation group were higher than the root canal wall（2.21±0.31) mm and the length of teeth（20.80±3.50） mm respectively. The difference was statistically significant(P＜0.05).
Conclusion  Pulp revascularization is superior to calcium hydroxide paste in pulpotomy for young permanent teeth. It can improve the success rate significantly, promote the root development of young permanent teeth effectively, and make clinical treatment more efficient.

Key words: pulpotomy； pulp revascularization, calcium hydroxide