Dental apex locator DPEX III DTE

1 .Multi-frequency apical position technology, able to measure accurately when blood or residual pulp in root canal. 2.Measurement results will not be affected by the tooth type . Clinical data matching, The accuracy rate has been improved to 97.71% Upgraded chip, real-time response, the sensitivity has been improved double Innovative algorithm, multi-frequency measurement, and anti-interference. THE ACCURACY COMTRAST AMONG DTE, AMERICAN BRAND D AND JAPANESE BRAND S Method: Prepare 97 teeth of pulpitis and apical paradentitis, total 175 root canals. After finishing the initial root canal preparation, use the Apex Locators of DTE, American brand D and Japanese brand S separately to measure the length of root canals, and combine the X-Ray film to test, finally compare the accuracy of the three types of Apex Locators. The defect of traditional measurement method Disadvantage of handing method Based on hand feeling and patient’s pain, dentists decide whether the measuring tool reaches apical foramen., with high subjectivity and low accuracy.Foreign literature suggest that providing the range of error ±0.5 mm , accuracy of handing method is only 42%. Disadvantage of X ray film 3D structure shooting at 2D plana, because of different angles, easily getting wrong data. Apical foramen can’t be shown in the X ray film, for over 80% apical foramens are in the side edge instead of apex.