Dental Model Resin ORTHO
Grade
ORTHO = orthodontic / thermoforming model resin
Choose the thermoforming grade for clear-aligner pressing, where 70 °C heat-distortion resistance and sharp margins come first and the formulation tolerates repeated forming cycles.
Values for the ORTHO condition
Other Dental Model Resin grades and fills
Dental Model Resin is listed in 4 conditions; see the grade overview at Dental Model Resin.
Compare all 4 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
High-speed / high-throughput model resin | Use the high-speed resin for large orthodontic model runs where short layer exposure and thicker layers raise throughput, accepting slightly lower accuracy and 48 MPa tensile strength. | 44 | 48 | 6 | 83 Shore D |
Ceramic/mineral-filled high-stiffness model resin | Pick the ceramic/mineral-filled resin for dies, occlusal adjustment and repeated thermoforming: 4.6 GPa modulus and 70 °C service, but it is brittle at 2% elongation and the vat needs stirring. | — | 60 | 2 | 90 Shore D |
ORTHOThis page Orthodontic / thermoforming model resin | Choose the thermoforming grade for clear-aligner pressing, where 70 °C heat-distortion resistance and sharp margins come first and the formulation tolerates repeated forming cycles. | — | 60 | 4 | 87 Shore D |
High-precision / low-shrinkage model resin | Choose the fine-detail grey resin for dies and implant or orthodontic measurement models needing ±50 µm accuracy; shrinkage and post-cure movement are minimal but elongation is only 3.5%. | — | 65 | 3.5 | 88 Shore D |
What is Dental Model Resin ORTHO?
Dental Model Resin ORTHO is Dental Model Resin in the ORTHO grade — choose the thermoforming grade for clear-aligner pressing, where 70 °C heat-distortion resistance and sharp margins come first and the formulation tolerates repeated forming cycles. Dental Model Resin ORTHO has a tensile strength of 60 MPa (8.7 ksi), stronger than 68% of polymer grades. Elongation at break is 4% and the elastic modulus is 2.7 GPa (0.392 Msi). Dental Model Resin ORTHO has a density of 1.18 g/cm³ (0.0426 lb/in³), heavier than 50% of polymer grades. Its glass-transition temperature is 78°C (172 °F).
Advantages
- Low, predictable mold shrinkage — 0.25%, better than 93% of polymer grades
Limitations
- Limited formability — 5/100, worse than 95% of polymer grades
- Difficult to weld — 5/100, worse than 89% of polymer grades
- Low fracture toughness — 1 MPa·√m (0.91 ksi·√in), worse than 87% of polymer grades
- Absorbs moisture — dry before molding — 0.9%, worse than 81% of polymer grades
- Limited ductility — 4%, worse than 78% of polymer grades
Dental Model Resin ORTHO properties
Typical room-temperature values for Dental Model Resin ORTHO; 10 are specific to this condition. Other listed values are Dental Model Resin reference data and may not represent this condition. Bars are the position among polymer grades.
Physical6
Dental Model Resin ORTHO has a density of 1.18 g/cm³ (0.0426 lb/in³), heavier than 50% of polymer grades. Its glass-transition temperature is 78°C (172 °F).
Mechanical11
Dental Model Resin ORTHO has a tensile strength of 60 MPa (8.7 ksi), stronger than 68% of polymer grades. Elongation at break is 4% and the elastic modulus is 2.7 GPa (0.392 Msi).
Thermal9
Dental Model Resin ORTHO is rated for continuous service to 70°C (158 °F). It conducts heat at 0.2 W/m·K (0.116 BTU/hr·ft·°F), worse than 56% of polymer grades. Thermal expansion is 80 µm/m·K (44.4 µin/in·°F).
Electrical4
Dental Model Resin ORTHO is an electrical insulator with a dielectric strength of 16 kV/mm (406.4 V/mil) and a resistivity of 1×10¹³ Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (70/100), worse than 78% of polymer grades. UV resistance is fair.
Sustainability3
Producing a kilogram of Dental Model Resin ORTHO takes about 105 MJ of energy and emits 5 kg of CO₂ — more than 54% of polymer grades. Typical recycled content is 0%.
Manufacturability6
Dental Model Resin ORTHO's machinability is good (55/100, worse than 64% of polymer grades); weldability not recommended (5/100); formability not recommended (5/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Dental Model Resin ORTHO
Is Dental Model Resin easy to machine?
Cured parts can be trimmed with small high-speed cutters or dental tungsten-carbide burs at light feed; the material is brittle and chips at edges, and dry grinding softens it through local heating, so work at low speed with dust extraction.
Can Dental Model Resin be welded?
Thermoset and not heat-weldable; join model sections by spotting on the same resin and curing under a 405 nm lamp, or bond with cyanoacrylate adhesive.
Can Dental Model Resin be formed, bent or molded?
Printed on SLA/DLP/LCD at 50–100 µm layers with the vat at 25–30 °C; after printing, wash 3–5 min in IPA, blow dry, then post-cure 5–20 min at 405 nm — under-curing causes dimensional drift and residual monomer.
What surface finishes work on Dental Model Resin?
Bead blasting or abrasive sanding gives a matte model surface; painting and plating are not recommended. Store models dry and away from light to prevent post-shrinkage and yellowing.
Dental Model Resin chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| urethane / epoxy (meth)acrylate oligomerbase oligomer, sets strength and toughness | 30 – 60 | 45 |
| difunctional methacrylate monomer (TEGDMreactive diluent, adjusts viscosity and crosslink density | 20 – 50 | 35 |
| multifunctional acrylate crosslinker (TMincreases stiffness and heat resistance | 3 – 15 | 8 |
| photoinitiator (TPO / BAPO / Irgacure ty385/405 nm initiation system | 0.5 – 3 | 1.5 |
| inorganic filler (silica / glass / ceramup to 30–40% in filled grades, near 0 in standard grades | 0 – 40 | 5 |
| pigment, UV blocker, additivescoloring (beige/grey) and cure depth control | 0.1 – 2 | 0.8 |
Dental Model Resin ORTHO — frequently asked
What is Dental Model Resin ORTHO used for?
Dental Model Resin ORTHO is typically used for orthodontic study models, denture cast models and clear aligner molds. In short: high-accuracy dental models; low print shrinkage; not for intraoral use.
What is the tensile strength of Dental Model Resin ORTHO?
Dental Model Resin ORTHO has a typical tensile strength of 60 MPa (8.7 ksi) — stronger than 68% of polymer grades. Strength varies by condition: see the 4 listed tempers.
Is Dental Model Resin ORTHO easy to machine?
Reasonably — machinability is rated good (55/100, worse than 64% of polymer grades). Cured parts can be trimmed with small high-speed cutters or dental tungsten-carbide burs at light feed; the material is brittle and chips at edges, and dry grinding softens it through local heating, so work at low speed with dust extraction.
Can Dental Model Resin ORTHO be welded?
Not readily — weldability is rated not recommended (5/100). Thermoset and not heat-weldable; join model sections by spotting on the same resin and curing under a 405 nm lamp, or bond with cyanoacrylate adhesive.
What surface finishes work on Dental Model Resin ORTHO?
Bead blasting or abrasive sanding gives a matte model surface; painting and plating are not recommended. Store models dry and away from light to prevent post-shrinkage and yellowing.
Can Dental Model Resin ORTHO be formed, bent or molded?
Printed on SLA/DLP/LCD at 50–100 µm layers with the vat at 25–30 °C; after printing, wash 3–5 min in IPA, blow dry, then post-cure 5–20 min at 405 nm — under-curing causes dimensional drift and residual monomer.
What is the maximum service temperature of Dental Model Resin ORTHO?
Dental Model Resin ORTHO is rated for continuous use to about 70°C (158 °F), and briefly to 80°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ISO 10993-1 Biological evaluation of medical devices — Part 1 — ISO (2018)
- ISO 4049 Dentistry — Polymer-based restorative materials (flexural test method) — ISO (2019)
- ASTM D638 / D790 / D648 / D2240 test methods for plastics — ASTM (2022)
- Dental model / orthodontic model photopolymer resin technical data sheets — Formlabs, SprintRay, DentaBase, Asiga, / (2024)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.