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Title:
DIGITIZED EVALUATION METHOD AND SYSTEM FOR QUALITY OF IN-VITRO ROOT CANAL PREPARATION
Document Type and Number:
WIPO Patent Application WO/2019/076330
Kind Code:
A1
Abstract:
A digitized evaluation method and system for the quality of in-vitro root canal preparation. The method comprises the following steps: firstly, manufacturing a 3D printed simulated resin tooth model based on an isolated tooth digitized image; then carrying out CBCT or micro-CT scanning on the resin tooth model before and after root canal preparation; recording conditions of an instrument model, a step, apical foramen enlargement and root canal orifice extraclast before and after the usage of a root canal preparation operation; using image processing software to extract a form of each cross-section (A0, A1) of a root canal wall, a geometric center point (B0, B1) of each cross-section of a root canal and the minimum distance from each part on the root canal wall to a dental surface; and next, carrying out an overlapping comparison on corresponding images before and after the preparation, and obtaining the degree of cleanliness and the degree of deviation of a prepared resin root canal and the remaining minimum root canal wall thickness (C1) after the preparation. By means of carrying out a digitized evaluation on an in-vitro root canal preparation operation of a resin tooth, the accuracy and objectivity of a root canal preparation effect evaluation can be improved.

Inventors:
TANG, Zisheng (No.639, Zhizaoju Road Huangpu District, Shanghai 1, 200011, CN)
XIA, Wenjun (No.639, Zhizaoju Road Huangpu District, Shanghai 1, 200011, CN)
WANG, Yiwei (No.639, Zhizaoju Road Huangpu District, Shanghai 1, 200011, CN)
Application Number:
CN2018/110764
Publication Date:
April 25, 2019
Filing Date:
October 18, 2018
Export Citation:
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Assignee:
SHANGHAI NINTH PEOPLE'S HOSPITAL, SHANGHAI JIAOTONG UNIVERSITY SCHOOL OF MEDICINE (No.639, Zhizaoju Road Huangpu District, Shanghai 1, 200011, CN)
International Classes:
A61C5/40
Foreign References:
CN104299500A2015-01-21
CN103246765A2013-08-14
CN101563045A2009-10-21
CN205073051U2016-03-09
JP2005060307A2005-03-10
US4661061A1987-04-28
Attorney, Agent or Firm:
SUNRAY INTELLECTUAL PROPERTY ATTORNEYS (Li Zheng, Suite 1806 Tomson Commercial Building,710 Dong Fang Road, Pudong, Shanghai 2, 200122, CN)
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