What are the material specifications for Apex Flex?
Apex Flex Partial Base is uniquely formulated to balance durability, flexibility, and load-bearing performance, so the appliance stays reliable across the functional demands placed on a flexible partial and its clasps.
Mechanical properties
| Property | Published value | Why it matters clinically |
|---|---|---|
| Work of fracture | >5,000 J/m² | Virtually unbreakable under normal use, with exceptional resistance to catastrophic failure |
| Elongation at break | >50% | The appliance moves naturally with the patient without cracking or stress |
| Flexural strength | >26.5 MPa | Withstands the functional forces placed on flexible partials and clasps |
| Flexural modulus | >700 MPa | Targeted flexibility for comfortable insertion, clasp retention, and shock absorption from bite forces |
The combination of moderate flexural strength with high elongation at break is what allows clasp arms to engage undercuts without creating the localized stress concentrations that lead to fracture or patient discomfort. The elevated work of fracture supports resistance to crack initiation and propagation over repeated insertion and removal cycles.
Product and regulatory details
| Attribute | Detail |
|---|---|
| Product name | SprintRay Apex Flex Partial Base |
| SDS product name | SprintRay Flexible Partial Denture Base (SDS-030) |
| Regulatory status | Class II FDA 510(k) cleared, biocompatible |
| Base shades | Standard Pink (500 g, SRI-0202187) and Light Pink (500 g, SRI-0202188) |
| Tooth shades | A1, A2, Bleach, and B1 |
| Companion tooth material | SprintRay Apex Teeth, validated for use with Apex Flex |
| Appearance (uncured) | Viscous liquid |
| Use restriction | Professional use only. Available for sale in the USA |
Apex Flex is validated exclusively for the SprintRay Pro 2 print ecosystem, which comprises the Pro 2 printer, ProWash S wash unit, and NanoCure curing unit. Printing Apex Flex on non-validated equipment falls outside the manufacturer's validated parameters.
Shade selection
Apex Flex partials involve two independent shade selections, and both should be specified on the Rx.
| Selection | Options | Notes |
|---|---|---|
| Base shade | Standard Pink, Light Pink | Determines the gingival tone of the flexible base and clasps |
| Tooth shade | A1, A2, Bleach, B1 | Determines the shade of the printed denture teeth |
Because the base material is naturally translucent, it blends with the surrounding gingiva rather than masking it. Select the base shade against the patient's actual tissue tone rather than defaulting to Standard Pink.
Additional Resources
For more information concerning the LOCATOR Overdenture:
Contact Information
For help with a solution for your next case, contact ROE Dental Laboratory:
- Phone: (216) 663-2233
- Email: info@roedentallab.com