Compressive strength of interocclusal recording materials.

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Prosthodontics

Background:

• Interocclusal records are crucial for mounting dental casts on articulators.
• Material deformation during mounting can lead to inaccurate occlusal relationships.
• Selecting appropriate interocclusal recording materials is vital for dental restorations.

Purpose of the Study:

• To compare the compressive deformation of three common interocclusal recording materials.
• To evaluate the influence of material thickness on deformation under a standardized compressive force.
• To determine optimal material selection and thickness for accurate dental articulator mounting.

Main Methods:

• Three interocclusal recording materials were tested: condensation silicone, recording wax, and rubber-based polyvinylsiloxane.
• Specimens of four different thicknesses (2 mm, 5 mm, 10 mm, 20 mm) were prepared.
• A 25 N compressive force was applied to each specimen, and deformation was measured.

Main Results:

• Significant differences in deformation were observed across various thicknesses for all tested materials (20 mm, 10 mm, 2 mm).
• No significant difference in deformation was found among the 5 mm thick specimens of the tested materials.
• Thicker specimens generally exhibited greater deformation under compressive force.

Conclusions:

• Interocclusal record materials should be selected based on their resistance to compressive deformation.
• Minimal thickness of interocclusal records is recommended to minimize distortion.
• The 5 mm thickness group showed comparable stability, suggesting a potential optimal range for certain materials.