Overview
EN ISO 19715:2017 - Dentistry - Filling instrument with contra angle defines requirements and test methods for hand-held dental filling instruments designed with a contra angle to apply and shape polymer-based restorative materials and cements. The standard covers design, classification, dimensions, materials, surface finish, marking and resistance to reprocessing, supporting consistent safety, performance and reusability across dental practice and manufacturing.
Key topics and technical requirements
- Scope & purpose: Requirements and test methods for filling instruments with a contra angle used in tooth restoration with polymer-based restorative materials and cements.
- Classification: Working ends are classified into five types (A–E): Ball, Pear, Plane plugger, Spatula (edge), Spatula (surface/beaver tail).
- Dimensions: Recommended overall geometry (example bend angles α = 135°, β = 90°) and detailed working-end sizes. Example diameters:
- Type A (Ball): 0.8–3.5 mm
- Type B (Pear): 0.8–2.5 mm
- Type C (Plane plugger): 0.8–2.5 mm
- Type D/E (Spatula): 1.0–3.2 mm
- Materials & hardness: Material selection is at the manufacturer’s discretion; stainless steel examples in ISO 7153‑1 are referenced. If stainless steel is used, hardness shall be 42 HRC to 60 HRC (tested per ISO 6507-1 / ISO 6508-1).
- Surface finish: Working ends shall be polished to a surface roughness Ra ≤ 0.4 µm; surfaces must be free of defects. Coatings to improve lubricity or contrast are permitted.
- Reprocessing resistance: Instruments must withstand 100 reprocessing cycles (cleaning, disinfection and, if recommended, sterilization) per manufacturer instruction and ISO 17664 without visible distortion, corrosion or performance loss. Exceptions apply for single‑use or manufacturer‑limited cycles.
- Marking & designation: Requirements for marking and for combining working ends are specified (see Annex A).
Applications and users
- Dental instrument manufacturers - for product design, quality control and compliance.
- Dental clinics and procurement teams - to select instruments meeting standardized dimensions, sterilization resilience and ergonomic contra-angle design.
- Sterilization/central service departments (CSSD) - to validate reprocessing procedures and cycles against ISO 17664.
- Regulatory and conformity assessment bodies - for device classification, labeling and market access in CEN/ISO markets.
Related standards
- ISO 17664 - sterilization information for reprocessable medical devices
- ISO 1942 - dentistry vocabulary
- ISO 6507‑1 / ISO 6508‑1 - hardness test methods (Vickers / Rockwell)
- ISO 7153‑1 - examples of suitable stainless steels (referenced)
Keywords: EN ISO 19715:2017, filling instrument with contra angle, dental instruments, polymer-based restorative materials, sterilization, reprocessing, working end types, surface roughness, hardness.
