ISO 23401-1:2023

Overview

ISO 23401-1:2023 specifies the requirements and test methods for acrylic hard-type materials used for chairside denture base relining in dentistry. This international standard focuses on materials that allow dental professionals to reline acrylic dentures directly in the clinic, ensuring optimal fit and patient comfort. ISO 23401-1:2023 also details packaging, marking, and manufacturer instruction requirements essential for safe handling and effective application. Importantly, this standard applies strictly to hard-type relining materials for chairside use, not for laboratory-use or soft lining materials.

Key Topics

Key aspects of ISO 23401-1:2023 include:

• Material Requirements: Outlines qualitative and quantitative properties for acrylic hard-type chairside denture relining materials.
  • Only for acrylic dentures, specifically polymers derived from acrylic and methacrylic acid esters.
• Performance Criteria: Details mandatory properties such as:
  • Consistency and handling characteristics
  • Surface finish and absence of defects
  • Water absorption and solubility limits
  • Maximum polymerization temperature (to protect patient safety)
  • Mechanical durability, defined by Knoop hardness
• Testing Methods: Standardizes sampling, specimen preparation, environmental conditions, and procedures for evaluating compliance, including:
  • Visual inspection for defects
  • Measurement of physical properties
  • Protocol for determining hardness and water-related properties
• Packaging & Marking: Specifies requirements to ensure material integrity and traceability, including manufacturer details, batch codes, expiry dates, and clear instructions.
• Instructions for Use: Mandates that manufacturers provide comprehensive, easy-to-follow guidelines for dental practitioners.

Applications

ISO 23401-1:2023 guides dentists and manufacturers in:

• Chairside Relining Procedures: Ensures use of safe, high-quality materials for relining acrylic dentures directly in the dental office, improving prosthesis fit and patient comfort.
• Manufacturing and Quality Control: Provides a standardized benchmark for material development and quality assurance, supporting consistent product performance globally.
• Risk Management: Emphasizes effective packaging, labeling, and instruction to minimize user error and enhance patient safety.
• Streamlining Clinical Practice: Facilitates faster denture adjustments, especially beneficial for patients with limited mobility who require same-day denture relining.

Typical users of chairside hard denture base relining materials and this standard include:

• Dental practitioners
• Dental material manufacturers
• Regulatory and compliance bodies

Related Standards

Understanding ISO 23401-1:2023 in context enhances its value. Closely related standards include:

• ISO 20795-1: Dentistry - Base polymers for denture bases
• ISO 10139-1 / ISO 10139-2: Dentistry - Soft lining materials
• ISO 1942: Dentistry vocabulary (terms and definitions used in this and related standards)
• ISO 3696: Specifications for laboratory water used in testing
• ISO 4545-1: Methods for Knoop hardness testing
• ISO 6344-3: Specifications for abrasive papers used in lab processes
• ISO 10993-1 and ISO 7405: Guidelines for biological and toxicological evaluation of dental materials

Adopting ISO 23401-1:2023 ensures regulatory compliance, product reliability, and improved patient outcomes for dental relining processes using hard acrylic materials. For the most current information and proper implementation, always consult the latest official ISO publication and manufacturer documentation.