PASTEL COLOR PRESENTATION

Articulators, Facebows and Casting Techniques

Presented and created by Antonio De Pascale, Federica Laneve, Bisci Giovanna, Cavallo Desièe, Andrea Carrozzo and Francesco Antonucci.

06/10/18

What is an Articulator?

Definition of Articulator

The Articulators are mechanical devices wich represent the upper and lower jaws and reproduce their movements and relationship.

Index

Casting Techniques

Articulators

Facebow

There are four different type of articulators :

Class III articulators are used for most types prothesis because are easy adjustable. Class IV reproduce the characteristics of single patiens and are very precise and difficult to adjust. Are used for total realization protheses and to analyze and solve gnathological problems. Small mistakes made by dentist during recording can affect the final result. There is therefore a need for another type of articulator, which should be selected accordingly,in order to obtain the best results.

Classification

Class I articulators reproduce vertical movements only and are used for casts for storage or to reline full dentures .Class II articulators are used for dentures or for minor works, they reproduce vertical and lateral movements.they are adjusted to reproduce the values of the average patient and not individual charaterstics

What is aFacebow?

Definition of Facebow

The facebow is a device wich is used by the dentis to record the position of the patient upper jaw in relation to the position of it's condyles.After the recording, the facebow can be positioned in the articulator, therefore the dental technician can work more precisely

Chasting Techniques

Electric resistance melting is an indirect system because a metal wire is wrapped around the crucible containing the metal alloy: the resistance heats the crucible, which then heats the alloy. Finally, induction melting relies on a magnetic field generated by a coil wrapped around the crucible. The magnetic field sets the particles of the alloy in motion, which begin to move faster and faster, thus heating the alloy, which eventually melts. This fusion does not depend on external heat: the alloy itself heats up. However, as CAD CAM techniques are now widely available, the use of casting in laboratories is becoming less common and it is likely that other materials (such as zirconia) will replace metal.

Techniques explanation

The fusion systems most used by dental technicians are torch fusion, electric resistance fusion and induction fusion. Torch casting is the oldest and most widespread system. It has a flame, powered by a mixture of gas and compressed air, heats the metal alloy to the melting point. This is called direct alloy heating, because the heat is directed towards the alloy.

10 Questions

10 Questions

10 Questions

10 Questions

10 Questions