YY/T 1691-2020Dentistry—Torque transmitter for handpieces (English PDF)
牙科学 手机扭矩传送器
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Issued by
NMPA
Level / Type
Industry · Recommended
Issue date
February 21, 2020
Implementation date
June 1, 2021
Scope
YY/T 1691-2020 is the English-translated version of 牙科学 手机扭矩传送器.
YY/T 1691-2020 is the Chinese pharmaceutical industry standard for the torque transmitter used with dental handpieces, the device that limits or indicates the torque applied to an instrument.
It gives the terms and definitions, the classification, the intended performance and the performance attributes, the performance evaluation, the production, the tolerance to repeated reprocessing, the information the manufacturer must supply and the test methods, covering above all the accuracy of the torque delivered and its stability after repeated sterilization. It was issued on 21 February 2020 and has applied since 1 June 2021.
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Document preview — YY/T 1691-2020
National Standard of the People's Republic of China
Issued by: National Medical Products Administration of the People's Republic of China
Contents
- Foreword3
- Introduction5
- 1 Scope6
- 2 Normative References6
- 3 Terms and Definitions7
- 4 Classification7
- 5 Expected Performance7
- 6 Performance Attributes7
- 7 Performance Evaluation10
- 8 Production10
- 9 Repetitive Processing Tolerance10
- 10 Information Provided by the Manufacturer11
- 11 Test Methods11
Foreword
This Standard was drafted in accordance with the rules provided in GB/T 1.1-2009.
This Standard adopts the re-drafting law to modify the adoption of ISO 17509:2016 Dentistry - Torque Transmitter for Handpieces (English version).
In comparison with ISO 17509:2016, the main technical differences are as follows:
---The Foreword part of ISO is deleted.
---In accordance with the habits of Chinese expression, the sequence of paragraphs in "Scope" is adjusted.
---In terms of Normative References, this Standard makes adjustments, so as to adapt to China's technical conditions and facilitate the implementation of this Standard. The condition of the adjustments is intensively reflected in Chapter 2 "Normative References". See the specific adjustments below:
lambda GB/T 4340.1, which is adopted in the modification, is used to replace ISO 6507-1 (see 6.3);
lambda GB/T 6062, which is equivalently adopted, is used to replace ISO 3274 (see 6.1);
lambda GB/T 9937 (all parts) is used to replace ISO 1942 (all parts) (see Chapter
3). The consistency between different parts of the two standards is as follows:
lambda GB/T 9937.1-2008 Dental Vocabulary - Part 1: General and Clinical Terms (ISO 1942-1:1989, IDT);
lambda GB/T 9937.2-2008 Dental Vocabulary - Part 2: Dental Materials (ISO 1942-2:1989, IDT);
lambda GB/T 9937.3-2008 Dental Vocabulary - Part 3: Dental Instruments (ISO 1942-3:1989, IDT);
lambda GB/T 9937.4-2005 Dental Vocabulary - Part 4: Dental Equipment (ISO 1942-4:1989, IDT);
lambda GB/T 9937.5-2008 Dental Vocabulary - Part 5: Terms Associated with Testing (ISO 1942-5:1989, IDT);
1 Scope
This Standard specifies the terms and definitions, classification, expected performance, performance attributes, performance evaluation, production, repetitive processing tolerance, information and test methods provided by the manufacturer of torque transmitters. This type of torque transmitter is used as an auxiliary device to be connected to a dental handpiece, which is used to place oral implants during oral implant surgeries and perform further operations on the connecting parts in the craniofacial region.
This Standard is applicable to torque transmitters that implant implants into or remove implants from the patient's oral cavity. The torque transmitter is connected to a power-driven system equipped with a torque control function. This Standard does not include dental implants or components connected to dental implants. This Standard is not applicable to the power-driven system itself.
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/T 4340.1 Metallic Materials - Vickers Hardness Test - Part 1: Test Method (GB/T 4340.1-2009, ISO 6507-1:2005, MOD)
GB/T 6062 Geometrical Product Specifications (GPS) - Surface Texture: Profile Method - Nominal Characteristic of Contact (stylus) Instruments (GB/T 6062-2009, ISO 3274:1996, IDT)
GB/T 9937 Dental Vocabulary (all parts) [ISO 1942 (all parts)]
GB/T 10610 Geometrical Product Specifications (GPS) - Surface Texture: Profile Method - Rules and Procedures for the Assessment of Surface Texture (GB/T 10610- 2009, ISO 4288:1996, IDT)
YY/T 0967.1-2015 Dental Rotary Instruments - Shanks - Part 1: Shanks Made of Metals (ISO 1797-1:1992, MOD)
YY/T 1474 Medical Devices - Application of Risk Management to Medical Devices
6 Performance Attributes
6.1 Dimensions
The dimensions and tolerances of shanks shall comply with the requirements for Type- 1 shanks in YY/T 0967.1-2015. The shape and dimensions of Type-1 shanks and the head shall be specified by the manufacturer.
NOTE: Figure 1 ~ Figure 4 are examples.
The surface roughness shall comply with the requirements of YY/T 0967.1-2015. In accordance with the methods specified in GB/T 6062 and GB/T 10610, conduct the test.
Test shall be conducted in accordance with the method specified in 11.1 and 11.2.
6.2 Performance
The torque transmitter connected to a suitable dental handpiece shall be designed to transmit a torque of at least 0.8 N-m to the dental implant.
The shape and dimensions of the connecting part of the implant or its connecting parts and the torque transmitter shall at least be included in the label information.
Test shall be conducted in accordance with the method specified in 11.3.
NOTE: the measured value is a technical limit, instead of a medical description.
The structure of the torque transmitter shall comply with the requirements of YY/T 1474 and provide safe and reliable operations in its connection with handpieces.
6.3 Material Selection
Applicable to Chapter 7 in YY/T 1486-2016.
The manufacturer of torque transmitter shall use materials designated in Appendix A in YY/T 1486-2016.
The hardness of steel rod pieces shall be tested by the method designated in GB/T 4340.1 and shall be not less than Vickers hardness 500HV5. signs of performance degradation or corrosion.
The repetitive treatment cycle shall include recommended methods of cleaning, disinfection and sterilization.
10 Information Provided by the Manufacturer
Applicable to Chapter 11 in YY/T 1486-2016.
The shape and dimensions of the connecting part of the implant or its connecting parts and the torque transmitter shall at least be included in the label information.
When appropriate, the manufacturer's name or registered trademark shall be marked on the device or related auxiliary devices.
11 Test Methods
11.1 Inspection of Product Technical Documents
By checking the product's technical documents, determine whether it complies with the requirements.
11.2 Dimensions
Conduct visual inspection and use suitable measuring instruments for the measurement, so as to determine whether the product complies with the requirements of all dimensions described by the manufacturer.
11.3 Stall Torque
11.3.1 Instruments
The requirements for the instruments are as follows:
a) Clamping system, which shall comply with YY/T 0967.1-2015.
b) Torque meter or dynamometer, which can measure torque in Newton meters, with an accuracy of ± 10%.
11.3.2 Steps
Insert the torque transmitter into the clamping system, then, fix it. Connect the torque measuring device to the outer end of the torque transmitter. Slowly rotate the torque meter, until the maximum allowable torque is reached. No phenomenon of deformation shall be observed.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 25 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 4340.1Metallic materials - Vickers hardness test - Part 1: Test method
- GB/T 6062Geometrical product specifications (GPS) -- Surface texture: Profile method -- Nominal characteristic of contact (stylus) instruments
- GB/T 9937Dentistry - Vocabulary
- GB/T 10610Geometrical product specifications (GPS) -- Surface texture: Profile method -- Rules and procedures for the assessment of surface texture
- YY/T 0967.1-2015Dental rotary instruments—Shanks - Part 1: Shanks made of metals
- YY/T 1474Medical devices - Application of usability engineering to medical devices
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Related Standards
GB/T 10610-2009 — Geometrical product specifications (GPS) -- Surface texture: Profile method -- Rules and procedures for the assessment of surface texture
GB/T 4340.1-2024 — Metallic materials - Vickers hardness test - Part 1: Test method
GB/T 6062-2009 — Geometrical product specifications (GPS) -- Surface texture: Profile method -- Nominal characteristic of contact (stylus) instruments
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