TPD 2

*Contraindication of the acrylic resin crowns are:

• Very small teeth

• Teeth with extended carious lesions

• Deep frontal occlusion

• To restore the morphology of dental crown.

*The correct answers about the casting the model are:

• Its a clinical step

• Its a technical step

• Dental stones are some of the materials used to make casts

• Epoxy resin is not a material used to make casts

*The correct answer about the tooth preparation is:

• Before it we need a written consent from the patient

• The final preparation must have retentivities

• The final preparation must be tronconical to cylindrical

• Its a tehnical step

*Examination of the patient:

• Is a clinical step

• Is not an important step

• The patients are not asked about private information.

• The person conducting the assement should be a health worker.

The FALSE answer about the impression is:

• Conventional impression is realised by using an impression material and tray.

• The impression does not register the neighbouring teeth.

• Digital impression is realised by using a 3D scan technology.

• The impressions register the prepared tooth, the antagonist teeth and the neighbouring teeth

*The FALSE answer about the tooth preparation is:

• Its a clinical step

• Chamfer is not a type of finishing line of preparation

• The selection of the finishing line depend on the materials used for restauration

• Its a tehnical step

The correct answer about the gypsum is:

• Its not important that the gypsum has abrasion resistance

• All the gypsum products have the same chemical structure

• Its not obtained from natural gypsum rock

• Its rarely used in dental practice

The FALSE answer about the articulator is:

• Simulates the movements of the mandible

• We dont need a face bow registration

• Can be human like(Arcon)

• Its used for prosthetic restaurations

The correct answer about the wax up is:

• The wax up marginals ridge should not be at the same level as the adiacent teeth

• Its the mirror image of the neighbouring tooth

• Its a clinical step

• Its a technical step

The impressions register:

• The prepared tooth

• The neighbouring teeth

• The antagonists

• All the answers above