West China Journal of Stomatology ›› 2020, Vol. 38 ›› Issue (5): 525-531.doi: 10.7518/hxkq.2020.05.009

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Guided endodontic access of calcified root canal by laser melting templates

Zhang Ting1,2(), Chen Du3, Miao Leiying1,2, Xie Sijing1,2, Tang Xuna1,2,4()   

  1. 1. Dept. of Cariology and Endodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210000, China
    2. Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210000, China
    3. Dept. of Prosthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210000, China
    4. State Key Lab. for Novel Software Technology, Nanjing University, Nanjing 210000, China
  • Received:2020-01-17 Revised:2020-03-15 Online:2020-10-01 Published:2020-10-14
  • Contact: Tang Xuna E-mail:zhangting7700@163.com;xunatang@126.com
  • Supported by:
    Nanjing Medical Science and Technique Development Foundation(YKK16157);Nanjing Foundation for Development of Science and Technology(201715040);Project of State Key Lab. for Novel Software Technology(Nanjing University)(KFKT2018B16);Project of Invigorating Health Care through Science, Technology and Education Jiangsu Provincial Medical Youth Talent(QNRC2016120);Jiangsu Provincial Medical Youth Talent(2017)

Abstract:

Objective The aim of this study is to treat calcified root canal and assess the accuracy of guided endodontics using laser melting templates. Methods Two cases with calcified anterior teeth were treated with laser melting templates. Cone beam computed tomography (CBCT) was used to scan the maxillary teeth of patients before surgery to establish the root canal system model. The maxillary impression of the patient was made and it was scanned by a 3D scanner. The CBCT scans were matched with surface scans of plaster model. Mimics 19.0 and 3-matic 11.0 software were used to design the virtual planning to access cavities. The templates were produced by laser melting 3D printing. Access cavity was prepared under the guidance of laser melting template. Then the deviations of planned and prepared cavities in three dimensions and angle were measured. Results The two teeth obtained satisfactory results. The first case had a angle deviation of 1.77°, a drilling base deviation of 0.403-0.497 mm, and a tip of 0.433-0.537 mm. The second case had a angle deviation of 3.26°, a drill base deviation of 0.18-0.347 mm, and a tip of 0.310-0.463 mm. Conclusion Laser melting template-guided endodontics is an effective technique for the treatment of calcified root canal and can be used as a new strategy for the treatment of calcified canal.

Key words: guided endodontics, laser melting templates, calcified root canal, cone beam computed tomography

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