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Castable Plastic Abutments Polyoxymethylene

Castable Abutments Polyoxymethylene (POM / Delryn / Acetal) 



Castable Abutments

POM / Delryn is an homogenous and bending resistant thermoplastic material used in the casting process. The wax casting process is widely used as it offers asymmetrical casting with veryne details to be manufactured relatively inexpensively.

Data Sheet

Material POM Polyoxymethylene (POM)
Density g / cm3 V 1.4
Molding shrinkage, longitudinal/transverse % 2.0 / 1.9
Thermal coefficient of linear expansion 10-4/K 1.1
Tensile Modulus MPa 2700
Yield stress (v=50/mm/min), stress at break MPa 65
Yield stress (v=50mm/min) % 9.4
Tensile creep modulus, 1000h, stain 0.5% MPa 1400
Hardness H358/30 MPa 145



  • High abrasion resistance
  • Low coefficient of friction
  • Natural translucency without metal
  • High heat resistance
  • Good electrical and dielectric properties
  • Low water absorption
  • Excellent medical grade plastic
  • Excellent casting conditions
  • Avoiding residues or sink marks

Material for accurate casting

Our castable products are produced using a unique process provides high quality surface finish on cast items. The material melts during the burnout cycle, allowing it to melt out of the investment without leaving any residue. This material is perfect for producing highly accurate and detailed full partials for direct investment casting. It is also possible to produce a multiple unit bridge with a perfect t. The material used in the process must be selected as to compensate for the dimensional changes that occur during the casting investment, including setting shrinkage/expansion of the casting investment.


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