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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 (CN)
XIA WENJUN (CN)
WANG YIWEI (CN)
Application Number:
CN2018/110764
Publication Date:
April 25, 2019
Filing Date:
October 18, 2018
Export Citation:
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Assignee:
SHANGHAI 9TH PEOPLES HOSPITAL SHANGHAI JIAOTONG UNIV SCHOOL MEDICINE (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 (CN)
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