YY/T 1117-2024 in English

Background of Standard Revision and Technological Evolution

The 2024 version of the standard integrates the two independent standards YY/T1117-2001 (powder type) and YY/T1118-2001 (viscosity type) for the first time. The main technological evolution is reflected in:

Analysis of key performance indicators

1. Mechanical performance requirements

The newly added radial compression strength indicator is calculated by the formula S=F/d. When testing, please note:

• The specimen preparation needs to be wrapped according to the standard process of 6.5.3
• The transition area should avoid the high tensile stress area
• The test speed is strictly controlled at 20mm/min

2. Curing characteristics control

Dual requirement system:

Clinical application implementation recommendations

1. Specification selection guide

According to the specification dimensions in Table 1 of the standard, commonly used clinical models are:

2. Key points of quality control

1. Immersion time: viscose type ≤15s (4.6 times stricter than powder type)
2. Gauze density: warp yarn ≥9 yarns/cm (viscose type has 1 less yarn than powder type)
3. Chemical properties: calcium sulfate hemihydrate content ≥88% (unified requirements for two types of products)

Impact analysis of standard implementation

Main challenges for manufacturers:

• The radial compression strength test equipment needs to be upgraded (universal testing machine + special fixture)
• The production line needs to add a curing temperature monitoring system
• The adhesive formula needs to be re-verified (clarify the calcium form requirements)

Clinical benefits:

• Mechanical performance indicators improve fixation reliability
• Temperature limits reduce the risk of patient discomfort
• Uniform specifications facilitate horizontal comparison of products