this step any excess acrylic is removed from the processed denture by the use of stone wheel burs, stone burs, and steel burs. Care must be taken not to heat the denture during grinding, because this may cause distortion of the denture base. Finally, the denture should be smooth and clean, as no plaster and no deep scratches should remain after the preparation for polishing.
In polishing a rag wheel with pumice is used for smoothing the denture. Then a final high polish is given to the denture with a rag wheel and polishing material (Rouge).
Special-purpose Training Tests for study the topic level testing
1. Patient with complete loss of teeth on the upper jaw is made a complete removable denture. After plastic polymerization the flask is removed from the hot and is rapidly cooled under running cold water. What do you think will happen in a plastic prosthesis basis in this case.
A. -pressure porosity is formed
B. -gas porosity is formed
C. -granular porosity is formed,
D. -the color of plastic changes
E. +microcracks occur
2. The patient, 57, is made a removable plate prosthesis for the upper jaw. On clinical and laboratory stages of its manufacture dental wax is used. Which group is the material related?
D. + modeling
3. A patient, 73, addressed to the clinic with complaints of poor fixation of complete removable dentures, manufactured 10 years ago. On check-up: reducing the lower third of the face, a large uniform atrophy of the alveolar processes. Oclussion surface of artificial teeth is almost completely erased. After how many years of use removable dentures patient should change them.
A. -7-10 years
B. -7-8 years
C. -1-2 years
D. -9-10 years
E. +3-4 years
4.Patient,70, complaines of a lack of fixation of complete removable dentures on the upper jaw. Objectively: the edge of the prosthesis in the frenulum of the upper jaw is shortened, the locking valve is broken. What should be done to improve the fixation of the prosthesis.
A. +Denture reproduction
B. -Denture correction
C. -Expansion of denture basis edges
D. Extansion of denture basis edges
E. -Volumetric modeling of denture basis
5. The patient, 70, is made complete removable dentures for the upper and lower jaws. Formulation of artificial teeth produced by the method of Vasiliev. What kind of teeth in the upper denture inappropriately must not touch the glass.
A. -Canines and first molars,
B. -central incisors and first molars,
C. first and second premolars
D. + lateral incisors and second molars,
E. -second premolars and first molars
6. Patient,47, is made complete removable dentures for the upper and lower jaws. The review stage of their construction shows protrusion of the upper lip. What stage was a mistake on?
A. -Determining the height of the lower third of the face
B. + The formation of the vestibular surface of the bite roller,
C. -Forming the occlusal plane
D. -Determination of the height of the upper bite roller
E. -Central occlusion fixation
7. A patient,73, addressed to the prosthodontics clinic at the basis of fracture of complete removable dentures on the upper jaw. The prosthesis was made a year ago, of satisfactory quality. What plastics must be used to fix the prosthesis in this patient.
8. The patient,70, with complete loss of teeth on the upper and lower jaws, is made complete removable dentures. Teeth setting will be conducted according to individual occlusal surfaces (the method of Napadov and Sapozhnikov). What material should rollers be made from for individual occlusal surfaces?.
A. -Adhesive wax
Man must build
Read the text
Man Must Build
Early builders were at first concerned almost entirely with constructing shelters against rain, cold, wild beasts, and human foes. Later, as their civilizations developed, they built temples, council chambers1, bazaars, and palaces. They took a special delight in erecting pyramids, towers, obelisks, coliseums, and the like.
The story of modern structures is the story of the break from the materials of the past. Great and noble structures were built in brick, timber, and particularly in stone, but now s