5.2. The basic stage

Visually to present to students, sets of the basic materials for manufacturing of demountable designs of tooth prostheses:

1. Basic plastic.

2. Alloys of metals.

3. A false teeth.

To discuss with students an employment theme, using the standardized list of questions.

5.3 Final stage

To estimate current activity of each student during employment, to carry out the analysis of progress of students, to declare an estimation of activity of each student and to expose in the sheet and a log-book of attendance and progress of students, to assure estimations the signature.

Short to inform students on a theme of following employment and methodical receptions by preparation for it.

6. Appendices

Test tasks

1. The basic property of plastic on dough-like swelling stages:

A. Viscosity.

B. Elastic.

C. Plastification.

D. Sufficient fluidity.

E. Possibility of formation a lattice.

2. The basic materials at manufacturing partial demountable пластиночного a prosthesis concern:

A. Abrasive materials.

B. Impression materials.

C. Modeling materials.

D. Ceramic masses.

Е. Basic plastic.

3. The basic demands to constructional materials for demountable tooth prostheses:

A. Fastness to power loads at chewing, biological inactivity, low technological properties.

B. Biological inactivity in an oral cavity, high cost.

C. Fastness to power loads at chewing, high technological properties, biological inactivity.

D. Low cost, firmness to power loads at chewing, low technological properties.

Е. Biological inactivity, high technological properties, small firmness to power loads at chewing.

4. The basic properties of constructional materials for the demountable tooth prostheses having crucial importance taking into account their application:

A. Durability, hardness, factor of thermal expansion, biological and chemical inactivity, adaptability to manufacture.

B. Hardness, density, durability, factor of thermal expansion, appearance, chemical inactivity, adaptability to manufacture.

C. Density, factor of thermal expansion, biological inactivity, internal structure.

D. Appearance, density, hardness, internal structure, biological and chemical inactivity.

E. Factor of thermal expansion, durability, adaptability to manufacture, density, chemical inactivity.

5. Before occurrence of plastic bases of demountable prostheses made:

A. From wood.

B. From ceramics.

C. From minerals.

D. From rubber.

E. From firm rubber.

6. Of what plastic make bases of demountable prostheses and a false teeth:

A. From phormaldegidis.

B. From phtoroplasts.

C. From acrylic.

D. From phenoplasts.

E.From polyethylenes.

7. The emulsion powder of acrylic plastic consists:

A. From the hardened monomer, chemical activators, stabilizers.

B. From the hardened monomer, opacifiers, a stain, a plasticizer.

C. From a stain, opacifiers, plexiglass, the chemical initiator.

D. From opacifiers, the hardened polymer, the initiator, phtoroplaste.

E. From a plasticizer, phenoplast, dioktilphtalatum, plexiglass.

8. A monomer of acrylic plastic:

A. Acetontsiangidrin.

B. Mix of acetone and alcohol.

C. Dioktilftalat.

D. A methyl metacrylate.

Е. A methyl Aether Acidum methacrylum.

9. Specify sequence of fabrication stages of artificial porcelain teeth in the factory way:

A. Preparation of raw materials, preparation of forming mass, fritting, smoothing preparations and enamel drawing, an odontoids and preliminary roasting, roasting.

B. Preparation of forming mass, fritting, raw materials preparation, roasting, an odontoids and preliminary roasting, smoothing preparations and enamel drawing.

C. Preparation of raw materials, fritting, preparation of forming mass, an odontoids and preliminary roasting, smoothing preparations and enamel drawing, roasting.

D. Fritting, raw materials preparation, an odontoids and preliminary roasting, smoothing preparations and enamel drawing, roasting, preparation of forming mass.

E. Smoothing of preparations and enamel drawing, roasting, raw materials preparation, fritting, preparation of forming mass, an odontoids and preliminary roasting.

10. On a way of bond with basis of a prosthesis porcelain teeth shares on:

A. Crampone, diatorical, tubular, standard and peg’s.

B. Tubular, peg’s, combined, diatorical, standard.

C. Standard, diatorical, crampone, ceramic-metal, tubular,

D. Peg’s, elastic, crampone, diatorical, standard.

E. Diatorical, crampone, peg’s, standard, zircon.

Standards of answers:

1. - C; 2. - Е; 3. - C; 4. - A; 5. - D; 6. - C; 7. - B; 8. – Е; 9. – C; 10. – A.

The list of oral questions on an employment theme: «the Basic materials for manufacturing of fixed designs of tooth prostheses».

1. Constructional elements partial of demountable plate prostheses.

2. Materials technology in orthopedic stomatology.

3. Physicomechanical and chemical properties of materials.

4. Basic plastic for demountable prostheses: structure, properties, applications.

5. Basic plastic: structure, properties.

6. Lining materials: structure, properties.

7. A false teeth from plastic.

8. A false teeth from porcelain.