Effectiveness and safety of pulp regeneration and revascularization therapy for pulpal necrosis of the immature permanent tooth: study protocol for a single-center, randomized, controlled, clinical trial

doi:10.3969/j.issn.2095-4344.2017.24.007

Abstract

Abstract:

BACKGROUND: Apexification and mineral trioxide aggregate apexification are mainly used to treat pulpal necrosis in the immature permanent tooth, but neither methods can increase the root canal length and thickness. How to promote the root development of the affected teeth based on patients’ potential? Pulp regeneration and revascularization has provided a new direction for clinical treatment, but successful cases are rarely reported.
OBJECTIVE: To testify the clinical effectiveness of pulp regeneration and revascularization in the treatment of pulpal necrosis, root development stagnation in the permanent teeth caused by caries, odontodysplasia and injury, thus providing reference for clinical application.
METHODS: We propose to conduct a prospective, single-center, randomized, controlled, clinical trial at Stomatological Hospital Affiliated to Xi’an Jiaotong University, Shaanxi Province, China. Eighty-two patients (82 affected teeth) with pulpal necrosis or periapical periodontitis in the immature permanent tooth from December 2013 to December 2016 were selected, and equally randomized into trial and control groups, followed by treated with pulp regeneration and revascularization, and apexification, respectively. The clinical examinations and X-ray radiology were used to evaluate the clinical effectiveness at 3, 6, 9, 12 and 18 months, and the pulp vitality and rot development were observed. The study protocol has been approved by the Ethics Committee of Stomatological Hospital Affiliated to Xi’an Jiaotong University of China (approval number: JDKY015-02). All protocols were performed in accordance with the Ethical Principles for Medical Research Involving Human Subjects in the Declaration of Helsinki. Written informed consent was provided by each patient and their family members after they indicated that they fully understood the treatment plan.
RESULTS AND CONCLUSION: Up to March 25, 2017, all patients have been followed up for 6.5-18 months. The treatment success rate in the trial and control groups was 97.6% and 82.9%, respectively, and the intergroup difference was significant (P < 0.05). The positive rate of pulp vitality in the trial and control groups was 24.4% and 0, respectively, which showed significant difference (P < 0.05). The rate of root continuous development showed significant difference between trial and control groups (63.4% vs. 29.3%, P < 0.05). To conclude, compared with apexification, pulp regeneration and revascularization exhibits high success rate in the treatment of pulpal necrosis in the immature permanent tooth, and can contribute to root development.

中国组织工程研究杂志出版内容重点：组织构建；骨细胞；软骨细胞；细胞培养；成纤维细胞；血管内皮细胞；骨质疏松；组织工程

Key words: Dental Pulp Necrosis, Apexification, Dentition, Permanent, Tissue Engineering

CLC Number:

R318

Li Jing, Wang Er-hui, Wang Yu. Effectiveness and safety of pulp regeneration and revascularization therapy for pulpal necrosis of the immature permanent tooth: study protocol for a single-center, randomized, controlled, clinical trial[J]. Chinese Journal of Tissue Engineering Research, 2017, 21(24): 3809-3814.

Figures/Tables 3

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