Here at Edison Medical™ we use injection molding technologies in order to produce our burnout products.
Castable Abutment | EM™ - Shop Dental Implant components
Castable Abutments
Castable Abutments are simple casting of custom-made abutments,
for the dental lab technician use.
Castable Plastic Abutments
Edison Medical’s selection of classic castable abutments are manufactured from high-grade polyoxymethylene (POM). Similar to Edison Medical’s UCLA abutment portfolio, castable abutments are a customizable and cost-effective alternative to pre-milled metal abutments. The base of the UCLA abutment, however, is made of high-grade titanium or cobalt-chrome (CoCr), elevating its strength and precision over the classic, all-POM castable abutment. The overcast UCLA abutment has also been found to have an improved hemidesmosomal attachment between implant surface and gingiva compared to the all-POM castable abutment, which is not able to achieve this gingival-abutment interface. Edison Medical’s POM castable abutments are designed for fit with more than 70 of the market’s leading implant brands.
Castable abutment applications in implant scenarios
Castable abutments provide a major advantage in that they are highly versatile within cement-retained and screw-retained restoration systems. By casting the polyoxymethylene sleeve, these abutments can be customized to the desired shape and height demanded by each implant scenario, allowing for height and angle adjustments of the entire restoration. The use of castable abutments has also been found to serve as an ideal treatment solution for more complex scenarios. With the combined use of a castable abutment and a transmucosal abutment, for instance, malposed single restorations have been successfully treated.
Polyoxymethylene (POM): an ideal material for castable abutments
Polyoxymethylene, also commonly known as POM, acetyl, and polyacetal, is a tough, rigid formaldehyde-based semi-crystalline thermoplastic whose properties render it ideal for use in short-term implantology scenarios. POM is exceptionally abrasion and heat resistant and has a low friction coefficient. It also features good electrical and dielectric properties, low moisture absorption, design flexibility and good dimensional stability. Being the plastic material that is the most crystalline in its structure, POM is a material that is used across a range of fields of application to replace metal thanks to its low friction coefficient, resistance to wear and excellent mechanical and physical properties. This versatile material can be produced in various grades and degrees of polymerization to suit the needs of a range of applications. POM is also 100% recyclable.
Below is an abbreviated datasheet of polyoxymethylene (POM), showing properties that render the material valuable to the dental implantology industry:
Property |
Value |
Density |
1.4 g/cm³ |
Mold shrinkage, longitudinal / transverse |
2.0 / 1.9 % |
Thermal coefficient of linear expansion |
1.1 * 10⁻⁴/K |
Tensile strength |
2700 MPa |
Yield stress (v = 50 mm/min), Stress at break |
65 MPa |
Yield strain (v = 50 mm/min) |
9.4 % |
Tensile creep modulus, 1000 h, strain 0.5% |
1400 MPa |
Hardness H358/30 |
145 MPa |
Further uses for POM in implantology scenarios
The properties of POM allow it to be melted during the burnout cycle and leave behind no trace of residues. It is an ideal material for use in producing high-precision full partials for direct investment casting, as well as perfectly fitting multi-unit bridges.