Flexible Partial Denture

Material Benefits & Evaluation

• High biocompatibility: The flexible material (typically nylon or polyamide) is metal-free, BPA-free, and does not irritate the gums.

• High elasticity: The material’s flexibility allows the clasps to be designed in a way that hugs the natural teeth without causing discomfort or pain.

• Ideal for patients with metal allergies or those sensitive to rigid materials like traditional acrylic.

Technical Specifications

• Material: Dental-grade polyamide (nylon). Metal-free, BPA-free. Brand options include Valplast®, TCS®, Deflex®, Lucitone FRS®.

• Optimal thickness:

  • Main base: 1.5 mm – 2.2 mm.

  • Flexible clasps: 0.9 mm – 1.5 mm.

• Mechanical & thermal properties:

  • Elongation at break: ≥ 60% (highly flexible, not brittle).

  • Deformation temperature: ≥ 180°C (withstands heat pressing and polishing processes).

  • Shore D hardness: 65–75 (depending on material type, moderately soft, not too flexible).

• Production time at the lab: 2–3 days (using digital impression files).