Proposing new standards for testing solubility of pulp preservation materials.

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Regenerative Dentistry

Background:

• Standardized testing is essential for reproducible data in dental material quality control.
• Current lack of established standards for vital pulp therapy materials hinders reliable evaluation.
• Developing standardized methods is critical for assessing the performance of pulp preservation materials.

Purpose of the Study:

• To develop a novel standard for evaluating the solubility of materials used in vital pulp therapy.
• To assess the solubility of Biodentine, TheraCal, and Activa under various testing conditions.
• To investigate the impact of different methodologies on the solubility measurements of pulp preservation materials.

Main Methods:

• Solubility testing of Biodentine, TheraCal, and Activa using ISO 4049:2019 (S1) and ISO 6876:2012 (S2).
• Modified methodologies included altered solution volumes (S1M, S2M), use of Dulbecco's modified eagle medium (DMEM) (S1D, S2D), and periodic solution changes (S1P, S1MP).
• Material characterization before and after testing using scanning electron microscopy (SEM) and X-ray diffraction (XRD).

Main Results:

• Solubility values varied significantly based on the testing methodology employed.
• Biodentine demonstrated lower solubility with reduced solution volumes under both ISO standards (p ≤ 0.05).
• TheraCal and Activa exhibited negative solubility values post-desiccation when tested with ISO 4049:2019, and Biodentine showed method-dependent microstructural changes.

Conclusions:

• The solubility of vital pulp therapy materials is highly dependent on the testing method.
• Current standard testing methods may not accurately reflect clinical conditions.
• The development of clinically relevant testing standards is imperative for meaningful evaluation of pulp preservation materials.