YY/T 1692-2020 English PDF (YYT1692-2020)

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YY/T 1692-2020: Dentistry--Hot melt gutta percha filling machine
YY/T 1692-2020
YY
PHARMACEUTICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 11.060.20
C 33
Dentistry - Hot Melt Gutta Percha Filling Machine
ISSUED ON: FEBRUARY 21, 2020
IMPLEMENTED ON: JUNE 1, 2021
Issued by: China Food and Drug Administration
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative References ... 4 
3 Terms and Definitions ... 4 
4 Requirements... 6 
5 Test Methods ... 9 
6 Instructions for Use ... 12 
Appendix A (informative) Schematic Maps of Injecting and Backfilling
Instrument and Heating and Packing Instrument ... 13 
Dentistry - Hot Melt Gutta Percha Filling Machine
1 Scope
This Standard specifies the terms and definitions, requirements, test methods and the
requirements for instructions of hot melt gutta percha filling machine.
This Standard is applicable to hot melt gutta percha filling machines, which complete
root canal filling by heating and melting gutta percha (hereinafter referred to as filling
machines).
This Standard is not applicable to equipment and instruments used merely for cutting
off gutta percha.
2 Normative References
The following documents are indispensable to the application of this document. In
terms of references with a specified date, only versions with a specified date are
applicable to this document. In terms of references without a specified date, the latest
version (including all the modifications) is applicable to this document.
GB 9706.1 Medical Electrical Equipment - Part 1: General Requirements for Basic
Safety and Essential Performance
GB/T 9937.3 Dental Vocabulary - Part 3: Dental Instruments
YY/T 0149 Medical Instruments of Stainless Steel - Test Methods of Corrosion
Resistance
YY 0505 Medical Electrical Equipment - Part 1-2: General Requirements for Safety -
Collateral Standards: Electromagnetic Compatibility - Requirements and Tests
3 Terms and Definitions
What is defined in GB 9706.1 and GB/T 9937.3, and the following terms and definitions
are applicable to this document.
3.1 Hot Melt Gutta Percha Filling Machine
Hot melt gutta percha filling machine refers to an instrument that completes root canal
filling by heating and melting gutta percha and injecting it into the root canal in root
canal treatment. It is usually composed of an injecting and backfilling instrument or a
3.9 Work Tip Thermal Sleeve
Work tip thermal sleeve refers to a component that is installed on the bending section
of the work tip to block high temperature and prevent from burning the patient’s oral
cavity.
4 Requirements
4.1 Appearance
In accordance with the method described in 5.2, conduct the test. The appearance of
the injecting and backfilling instrument shall satisfy the following requirements:
a) The appearance of the injecting and backfilling instrument shall be easy to
clean; the shell shall manifest no sharp edges, burrs or cracks; the plastic
parts shall be free of blistering, cracking or deformation;
b) The panel of the injecting and backfilling instrument shall manifest no peeling
or rusting of the coating; the text and marking on the panel shall be clearly
visible.
4.2 Injecting and Backfilling Instrument (if possible)
4.2.1 Heating function of handpiece of injecting and backfilling instrument
The heating function of handpiece of injecting and backfilling instrument shall satisfy
the following requirements:
a) In accordance with the method described in 5.3.1 a), conduct the test; the
manufacturer shall specify the adjustment range and adjustment mode of the
heating temperature of the handpiece of the injecting and backfilling
instrument;
b) In accordance with the method described in 5.3.1 b), conduct the test; the
heating temperature control deviation of the handpiece of the injecting and
backfilling instrument shall not exceed ± 10%;
c) In accordance with the method described in 5.3.1 c), conduct the test; the
injecting and backfilling instrument shall have an independent timer to control
the continuous heating time; when the timer limit is reached, the handpiece of
the injecting and backfilling instrument shall automatically stop heating;
d) In accordance with the method described in 5.3.1 d), conduct the test; the
handpiece of the injecting and backfilling instrument shall have an obvious
indication for two working states: heating process and temperature reaching
the preset value.
b) In accordance with the method described in 5.4.2 b), conduct the test. During
the normal use, the surface temperature of the bending section of the work tip
shall be not higher than 51 °C, or, the surface temperature of the work tip
thermal sleeve (if possible) shall be not higher than 60 °C.
4.4 Toughness
The toughness of gutta percha injecting needle and work tip shall satisfy the following
requirements:
a) In accordance with the method described in 5.5 a), conduct the test; after
receiving the toughness test, the gutta percha injecting needle (if possible)
shall manifest no phenomenon of fracture;
b) In accordance wit the method described in 5.5 b), unless the manufacturer
specifies that the work tip (if possible) cannot be bended, otherwise, after
receiving the toughness test, the work tip shall manifest no phenomenon of
fracture. In addition, after being connected to the handpiece of the heating
and packing instrument, it shall be able to normally heat up.
4.5 Surface Roughness
In accordance with the method described in 5.6, conduct the test; the surface
roughness Ra of the work tip (if possible) shall be not greater than 0.8 μm.
4.6 Corrosion Resistance and Anti-sterilization
The corrosion resistance and anti-sterilization of the components of the filling machine
shall satisfy the following requirements:
a) In accordance with the method described in 5.7 a), conduct the test; the work
tip (if possible) shall have good corrosion resistance; there shall be no visible
signs of corrosion;
b) In accordance with the method described in 5.7 b), conduct the test; when (if
possible) gutta percha injecting needle, thermal protector cap, work tip and
work tip thermal sleeve are for single use, then, before exiting factory, the
single-use components shall be sterilized, or, be sterilized before use in
accordance with the sterilization steps specified by the manufacturer in the
accompanying documents, and there shall be no phenomenon of damage.
When (if possible) gutta percha injecting needle, thermal protector cap, work
tip and work tip thermal sleeve are reusable, then, the reusable components
shall at least be able to endure the number of sterilization specified by the
manufacturer in accordance with the sterilization steps specified by the
manufacturer in the accompanying documents without manifesting any
phenomenon of damage.
heating chamber specified by the manufacturer;
c) Conduct structural inspection and actual operation inspection; use a
stopwatch for timing;
d) Conduct visual observation and actual operation in the inspection.
5.3.2 Gutta percha injecting needle installation test
Conduct actual operation in the inspection; use a dynamometer to axially pull the gutta
percha injecting needle.
5.3.3 Thermal protector cap surface temperature test
Set the heating temperature of the handpiece of the injecting and backfilling instrument
to the highest gear of the temperature control range. In accordance with the longest
loading time in the working mode specified by the manufacturer, ...