Non anatomic Teeth are also called as Zero Degree or Cuspless teeth used in Complete dentures in Prosthodontics.
Non Anatomic Teeth are Defined as: The Artificial teeth with occlusal surfaces which are not anatomically formed but which are designed to improve the function of mastication.
Cuspless teeth are Defined as: The artificial teeth which are fabricated without the cuspal prominences as seen in natural teeth to improve mastication and increase surface area.
Zero Degree teeth are Defined as: The artificial teeth which do not have any cuspal inclinations compared to the horizontal occlusal tooth surface.
The Indications of Non-Anatomic or Zero Degree or Cuspless Teeth:
- Flat ridges
- Knife edge ridges
- Large inter ridge space
- Milling type of hewing pattern with broad excrusions
- Where debilitation has reduced the patients co ordination needed to handle a cusped type of occlusion
- In patients with bruxism to decrease the force on basal tissue
- Patient with neuromuscular disorder where accurate jaw relations cannot be taken
- In case of highly resorbed ridges as they do not get locked or displace the denture during its function