Prosthetics accessory with system The Static Laser is used to check the autonomous multi-local stability of a single posterior tooth in the maxilla and in the mandible. This increases the positional and functional stability of complete dentures, particularly in the mandible. The laser is a simple tool for establishing whether the posteriors are above the centre of the alveolar ridge. It also simplifies the current method of model analysis and therefore reduces possible systematic errors to a minimum.