Description
Standard: ASTM F136 ASTM F67
Brand: MediTi
Tolerance: h6/h7/h8
MOQ: 10kg
Delivery time: 15days
Surface treatment: bright surface
detailed Description
1. Common size specifications
The size of dental titanium rods needs to match the processing equipment and clinical needs. Common specifications are as follows:
| Item | Range | Remark |
|
Dia(mm) |
3.0 ~ 30.0 |
Commonly used: 6.0, 8.0, 10.0 (to meet the needs of CNC cutting) |
| Length(mm) | 50 ~ 500 (customization can reach 1000) | Standard bars are mostly 100mm/200mm segments |
| Tolerance(mm) |
±0.05 (high precision ±0.02) |
Affects the assembly accuracy after cutting |
| Surface treatment |
Polishing (Ra≤0.8μm) |
Some customers require oxidation or passivation treatment |
Note: Thin rods with a diameter of ≤5 mm are mostly used for small restorations (such as personalized abutments), and large diameter rods are used for cutting full denture frameworks.
2. Core Mechanical Performance Requirements
Dental titanium rods need to meet the mechanical stability requirements in the long-term oral environment. The key indicators are as follows:
1)Static mechanical properties
| performance | TC4 (Ti-6Al-4V) Typical Values | Typical values of pure titanium (Gr2) | Clinical significance |
| Tensile strength (MPa) | ≥860 | ≥345 | Ensure that the restoration bears the occlusal force for a long time |
| Yield strength (MPa) | ≥795 | ≥275 | Prevent permanent deformation (such as bridge bending) |
|
Elongation (%) |
≥10 | ≥20 | Pure titanium is easier to process, and TC4 is more suitable for high-stress scenarios |
2) Dynamic mechanical properties
●Fatigue resistance: Need to pass >10⁷ cycles test (load simulates chewing force), TC4 is better (especially suitable for multi-unit implant bridges).
●Elastic modulus: TC4≈110 GPa, close to natural bone (reduces stress shielding effect).
3) Processing suitability
●Cutting performance: High-purity titanium (impurity O≤0.18%) can reduce tool wear.
●Weldability: Pure titanium is easier to laser weld, and TC4 requires protective gas (such as argon).
3. Key chemical performance requirements
1) Composition control (ASTM F67/F136)
| element | TC4 requirements (wt%) | Pure titanium requirements (wt%) | Risk Points |
| Al |
5.5~6.5 |
- | Excessive Al may reduce biocompatibility |
| V |
3.5~4.5 |
- | Excessive V ions may cause cytotoxicity |
| O |
≤0.13 |
≤0.25 |
High oxygen content reduces ductility |
| Fe |
≤0.25 |
≤0.30 |
Impurities affect corrosion resistance |
2) Corrosion resistance
●Simulated oral test: Soaked in artificial saliva with pH=2~9 for 30 days, the corrosion rate must be <0.001mm/year.
●Passivation layer stability: The natural oxide film (TiO₂) must be intact and can be enhanced by anodization.
3) Biocompatibility
●Pass ISO 10993-5 (cytotoxicity) and ISO 10993-10 (sensitization) certification.
●TC4 must provide a low interstitial element (ELI) version for patients with allergies.
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