YY/T 0803.2-2020 in English
VALIDDentistry—Endodontic instruments—Part 2:Enlargers
- Issued on:2020-06-30
- Implemented on:2021-12-01
- File Format:PDF
- Delivery:Via email within 5 business days
Price(USD)：
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$301.00
$301.00
| Standard No: | YY/T 0803.2-2020 |
| Document status: | VALID |
| Title in English: | Dentistry—Endodontic instruments—Part 2:Enlargers |
| Title in Chinese: | 牙科学 根管器械 第2部分:扩大钻 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2020-06-30 |
| Implemented on: | 2021-12-01 |
| Superseding: |
YY/T 0803.2-2010 Dentistry—Canal instruments—Part 2:Enlargers
|
| ICS Classification: | 11.060.20-Dental equipment |
| Chinese Classification: | C33-Stomatologic device, equipment and material |
| Professional Classification: | YY-Pharmaceutics |
| Related Keywords: | length type class=instrument > p type
g type enlargement drill large-sized root canals type p type b1 length type g |
| Related Topics: | Ministry of Science and Technology
Most of the technology Most of the technology university system single subject university expand single subject university Guangda and SUSTech Li Ke University of Science and Technology of China |
本标准规定了在YY 0803.1-2010、YY 0803.3、YY/T 0803.4、YY/T 0803.5中没有提及的扩大钻的具体要求。本标准还规定了扩大钻的尺寸、标记、产品标识、安全注意事项以及标签和包装，包括使用说明的具体要求。
Introduction
Analysis of the core content of the standard
| Technical elements | Requirements of the 2010 version | Updates to the 2020 version |
|---|---|---|
| Standard name | Enlarger | Enlargement drill (Terminology standardization) |
| Reference standard | ISO 1797-1/2 | Replaced with YY/T 0967.1-2Modified to adopt international standards |
| Mechanical properties | Torsion/bending/fatigue strength | Change to Torsion/Bending/Fatigue Performance (more in line with the test substance) |
Instrument classification and technical parameters
Comparison of characteristics of five types of enlarged drills
- Type B1: head length 4.5-4.75mm, 4-blade design
- Type B2: minimum specification 0.3mm, 7.5-10mm working length
- Type G: 3-blade structure, tip diameter 0.25-0.5mm
- Type M: unique 13mm constant working length
- Type class=instrument>P type: Fatigue resistance requirement is up to 2000 cycles
Key performance requirements
Mechanical performance indicators
Take G type enlargement drill as an example: Nominal specification 110 must meet the following requirements
- Torsion resistance: ≥73mN·m/180° deflection
- Bending resistance: offset angle ≤30°
- Fatigue resistance: ≥300 cycles
Fracture position requirement: within 4mm of the rod end joint (except M type)
Clinical application recommendations
Instrument selection guide
| Clinical needs | Recommended types |
|---|---|
| Root canal crown preparation | Type B1/B2 |
| Narrow root canal opening | Type G (0.25mm tip diameter) |
| Large-sized root canals | Type P (maximum 1.7mm diameter) |
Note: Type M enlargement drill is suitable for root canals with special anatomical shapes, but it should be noted that it does not require a fracture position
Sample only — not a preview of YY/T 0803.2-2020
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