Analysis Of The Clinical Effect Of Revascularization In 42 Immature Permanent Teeth

Objective:1.The clinical effect of revascularization in the treatment of young permanent teeth due to pulp necrosis with or without periapical inflammation was reviewed to provide more evidence for the clinical efficacy of revascularization.2.Quantitatively measure the X-rays of the teeth after revascularization,and analyze the effects of revascularization on tooth root development.Methods:This study reviewed the treatment and clinical effect of revascularization in 42 young permanent teeth due to trauma,fracture of abnormal central cusp,caries and other factors in 34 patients in pediatric dentistry of School and Hospital of Stomatology,Fujian Medical University from March 2017 to September 2020.Collect the patients’ basic clinical information such as age,gender,etiology,diagnosis,treatment and postoperative follow-up data.Analyze the clinical outcomes(survival,healing,and root development).The postoperative and recall radiographs were calibrated and quantitatively measured by two trained graduate students using Image J software.SPSS was used for data entry analysis.Results:1.The postoperative follow-up time was 6 to 38 months.At present,all 42 teeth are alive.The survival rate of the teeth is 100%.Among them,38 teeth have achieved clinical healing and 4 teeth have failed.The clinical healing rate is 90.5%.There were 6 teeth with positive electric pulp test after operation,and the temperature test felt the same as the control teeth,reaching the third-level goal,accounting for 14.3% overall.Among the 38 teeth that achieved clinical healing,apical closure was observed in 25 teeth,accounting for 65.8% of the clinical healing teeth.Calcified bridge was found in 7 teeth and diffuse calcification was found in 12 teeth in the root canals.The latter two were 16 teeth,accounting for42.1% of the clinical healing teeth.2.Quantitative measurement of postoperative X-rays of these 42 teeth and statistical analysis with general linear model.42 teeth showed root growth and canal wall thickening,the results were statistically significant.The ratio of root-dentin area was also significantly increased compared with that immediately after the operation.The direction of root development is not necessarily the same in different stages of root development.In this study,the changes of root length and root canal wall thickness were significant in patients with Nolla 8,while the increase of RDT was the main manifestation in patients with Nolla 9.Due to the small number of teeth in Nolla 7,more data are needed to explain the problem.Compared with the teeth with and without calcified bridge,the root length of the teeth without calcified bridge increased significantly,suggesting that the formation of calcified bridge may affect the increase of root length.Conclusion:Within the limitations of the present study,it can be concluded that RET yielded high survival and healing rates with a good root development rate.It is an effective treatment method for immature permanent teeth after pulp necrosis.However,it has a higher risk of calcification bridges and diffuse calcification in the root canal,which is not conducive to the repair of the nucleus crown in the future.Therefore,the indications need to be correctly grasped in clinical practice.