Overview
ISO 13397-2:2005 - Dentistry: Periodontal curettes of Gr‑type defines the design and dimensional requirements for Gr‑type periodontal curettes. It is Part 2 of the ISO 13397 series covering periodontal curettes, dental scalers and excavators. The 2005 (second) edition updated the first edition by adding types Gr‑15 to Gr‑18 and clarifying blade angles and surfaces.
Key topics and technical requirements
- Scope: Specifies shapes, critical dimensions and measurement points for Gr‑type periodontal curettes used on root surfaces.
- Design models: Illustrative models and dimensional tables identify Gr‑types Gr‑1 through Gr‑18 with side and top views to standardize form and function.
- Dimensions and tolerances: The standard lists numeric dimensions for blade width, thickness, blade/shaft heights, length to first bend and angular tolerances. For example, overall instrument length must be ≤ 178 mm.
- Angles and geometry:
- Cutting angle (α): Approximately 70° for Gr‑types (defined between the anterior surface and the axis of the first shank).
- Offset angle (β): Varies by Gr‑type to enable access to different root surfaces (values differ across type groups).
- Relief angle (γ): Defines the acute angle between the anterior surface and the lateral surface; in some cases the value may be left to manufacturer choice.
- Measurement points: Clear definitions for where to measure blade width and thickness (typically at 2 mm from the blade tip), blade radius (r ≈ 3 mm reference), heights and length to the first bend. Measurement methods reference ISO 13397‑1 (Annex A) for applied procedures.
- Terminology: Uses ISO 1942 dental vocabulary and ISO 13397‑1 general prescriptions for consistency.
Practical applications and users
- Manufacturers and designers: Use the standard to design Gr‑type periodontal curettes with consistent geometry, interchangeability of shanks and predictable clinical performance.
- Quality control and inspection: Provides measurement points and tolerances for incoming inspection, production control and acceptance testing.
- Procurement and regulation: Helps procurement teams specify compliant instruments and supports regulatory submissions by documenting conformance to an international standard.
- Dental educators and clinicians: Clarifies intended use (root surface treatment) and selection by Gr‑type to match anatomical access needs.
- Instrument reprocessing and maintenance: Standardized dimensions assist maintenance and replacement decisions.
Related standards
- ISO 13397‑1 - General prescriptions for periodontal curettes and hand instruments (measurement method reference).
- ISO 13397 Parts 3 & 4 - Other instrument types (Type H scalers, discoid excavators).
- ISO 1942 - Dental vocabulary used for terms and definitions.
Keywords: ISO 13397-2:2005, periodontal curettes, Gr-type curettes, dental instruments standard, curette dimensions, dental scalers, instrument design, dental manufacturing standards.
Open preview (PDF)Dentistry — Periodontal curettes, dental scalers and excavators — Part 2: Periodontal curettes of Gr-type