Overview
EN ISO 13397-1:1995 (CEN adoption) defines the general material and performance requirements for periodontal curettes, dental scalers and excavators. This Part 1 sets baseline criteria used by manufacturers, test laboratories and regulatory teams to verify that dental hand instruments meet accepted safety, durability and functional standards.
Key aspects covered include material selection, surface finish, hardness classification, resistance to sterilization and thermal exposure, and mechanical integrity of the union between working end and handle.
Key Topics
- Scope and purpose: Specifies general requirements applicable across instrument types covered by the ISO 13397 series.
- Material of working end: The working end shall be made of martensitic stainless steel complying with ISO 7153-1 or other materials that satisfy clause 6 performance requirements.
- Handle material: Selected at the manufacturer's discretion, provided it meets the same performance tests.
- Vickers hardness classification: Instruments are classified by Vickers hardness of the working end:
- Class 1: 600 HV - 700 HV
- Class 2: 550 HV - 620 HV
The finished instrument is tested per ISO 6507-2 and the manufacturer must declare the hardness class for each instrument range.
- Surface finish: Requirements for visibly defect-free surfaces, with definitions for satin (uniform, reduces glare) and mirror finishes (highly reflective, ground and polished to remove imperfections).
- Corrosion and thermal resistance: Instruments must show no visible corrosion after specified autoclave/boiling and thermal tests (see ISO 13402 for test procedures). Vickers hardness must remain within the declared class after thermal exposure.
- Union strength: The working end‑to‑handle union must withstand a tensile load of 600 N (≥5 s) and a torque of 400 N·cm (≥5 s) without loosening.
- Measurement: Annex A describes a preferred optical projector (shadowgraph) method for dimensional and angular measurement of working ends.
Applications
This standard is essential for:
- Manufacturers designing and qualifying periodontal curettes, dental scalers and excavators.
- Quality and compliance teams verifying instrument durability, corrosion resistance and sterilization performance.
- Procurement and dental clinics requiring documented evidence of instrument performance and safe reprocessing.
By following EN ISO 13397-1:1995, stakeholders ensure instruments meet consistent mechanical and material criteria that support clinical safety and lifecycle performance.
Related Standards
- ISO 1942-3 - Dental vocabulary: definitions for dental instruments.
- ISO 6507-2 - Vickers hardness testing (HV 0.2 to
