HIỆU QUẢ TẠO HÌNH ỐNG TỦY Ở NHÓM RĂNG HÀM NHỎ THỨ NHẤT BẰNG HỆ THỐNG FILE JIZAI TRÊN THỰC NGHIỆM

Abstract

Objective: Evaluate the results of root canal shaping in the first premolar group by the experimental Jizai file system. Subjects and methods: The study was carried out on 90 extracted first premolars collected at Hanoi Medical University Hospital and Hanoi Medical University Academy of Odonto-Stomatology (51 molars maxillary first premolars and 39 mandibular first premolars), period from 6/2021 to 6/2022. Research method is an experimental study without control, random sample selection according to the criteria until the number of studies is sufficient. Results: 90 first premolars with 160 canals, there were 61 canals shaped by Jizai I (38.1%), 93 canals shaped by Jizai II (58.1%) and 6 canals shaped by Jizai III (3,8%). During the shaping process, there were 3 Jizai I files broken in the apical and there were no cases causing wall perforation or zip. File Jizai I, II, III changes the average curvature by 5.76±3.63 degrees, 4.72±3.82 degrees and 5.57±3.67 degrees, respectively. The centering ability of Jizai files I, II, III at 3mm position is 0.76±0.27, 0.73±0.33, 0.80±0.27, at 5mm position is 0.78±0.34, 0.80±0.26, 0.76±0.20, at 5mm position, 8mm position is 0.86±0.28, 0.82±0.24, 0.68±0.19. Conclusion: The Jizai file system is a good file system with effective root canal shaping ability for endodontists.