BS EN ISO 12836-2015 pdf download.Dentistry一Digitizing devices for CAD/CAM systems for indirect dental restorations – Test methods for assessing accuracy.
The test procedure used shall be reported.
EXAMPLE Tested in accordance with ISO 12836:2012, Annex A. Inlay-shaped specimen.
5 Test methods
5.1 General
Use at least two of the test methods described in AnnexA, AnnexE. and Annex C.
5.2 Test conditions
Testing shall be done under the following test conditions:
a) the change of temperature during the test shall remain within ±1 °C;
b) the ambient room temperature shall be (23 ± 2) °C in accordance with ISO 554;
c) the quality of the data set in terms of any missing or corrupted data shall be evaluated by the operator; in cases of missing or corrupted data, the test shall be repeated.
5.3 Accuracy
5.3.1 Repeatability
Repeat the measurement 30 times without removing the test specimen from the digitizing device. Use the test specimen and procedures specified in Annex A. Annex B. or Annex C as recommended in the manufacturer’s instructions for use. Calculate the mean and standard deviation of the 30 measurements. Record this value(s).
5.3.2 Reproducibility
Repeat the measurement 30 times, removing the test specimen from the digitizing device and replacing it into the digitizing device. Use the test specimen and procedures specified in Annex A. Annex B or Annex C as recommended in the manufacturer’s instructions for use. Calculate the mean and standard deviation of the 30 measurements. Record this value(s).
5.3.3 Trueness
Calculate the difference between the mean of the 30 repeatability measurements and a true value obtained independently according to the respective annex. (See A.6.Z. B.6,2. or
6 Test report
Prepare a written test report. The test report shall contain at least the following information:
a) a reference to this International Standard, i.e. ISO 12836:2015;
b) a reference to the annexes of this International Standard used for testing;
c) identification of the test specimen (i.e. inlay-shaped specimen, crown-shaped specimen, bridgeshaped specimen, sphere specimen);
d) specimen surface preparation;BS EN ISO 12836 pdf download.