prosthetics MCQS (test 20-30)

1. What is the name of the membrane that covers the dental crown:

a) enamel b) dentin c) cuticula dentis d) cement

c) cuticula dentis

2. Tooth enamel is composed of:

a) inorganic matter b) organic matrix c) water (d) all of the above

d) all of the above

3. What is extremely sensitive dentin:

(a) mechanical irritants b) of physical irritants c) of chemical irritants (d) all of the above

d) all of the above

4. How many wells are observed on the occlusal surface of the sixth upper tooth:

a) two b) three c) four d) strictly individual, no exact number

d) strictly individual, no exact number

5. When the articulation of the lower jaw, contacts occur between single teeth, these contacts are called: (a) preliminary b) main contacts c) C - contacts d) A - contacts

a) preliminary

6. The condition in which the lower teeth are most medial, central located relative to the upper teeth is called: a) central relation b) central occlusion c) myocentral occlusion d) final posterior occlusion

a) central relation

7. In the deep bite the overlap of the lower front teeth from the above is: (a) more than 11 mm (b) more than 2 mm c) more than 5 mm (d) depends on the severity of the deep bite

d) depends on the severity of the deep bite

8. Sucking is a reflex motor function that is performed by: a) the facial muscles of the lips and cheeks b) the masticatory muscles c) the language (d) all of the above

d) all of the above

9. Which of the following points does not participate in the formation of the figure of geometric mimicry area (MEO): a) Glabella b) Ektokantion c) Zygion d) Gnathion

d) Gnathion

10. In the phase of maximum opening the articular heads move: (a) to the deepest part of the joint fossa b) to the top of the articular tubercle c) does not move anywhere d) rotates around its own mechanical axis.

b) to the top of the articular tubercle

11. What is registered with the "Christensen phenomenon": a) the angle (slope) of the condylar road b) the gothic corner c) the Bonneville angle d) Gerber angle

a) the angle (slope) of the condylar road

12. What are the changes in the maxillofacial muscles, in case of a defect in the teeth series and pronounced phenomenon of Godon: a) hypertrophies the muscles of the tongue b) hypofunction of the masticatory muscles (c) in particular with compulsory one-sided feeding on the part of the worker (d) all of the above

d) all of the above

13. The third phase of the mastication diagram (according to Rubinov) corresponds to: (a) opening the mouth and eating b) onset of masticatory function c) physiological rest (d) final act of takeover

d) final act of takeover

14. What is the advantage of joints (SOZE) over hooks: (a) allow for a lower location of the support part b) they are healthier c) have a caries-prophylactic effect d) have complex laboratory technology

a) allow for a lower location of the support part

15. In order to perform their functions, rectangular sleepers shall be combined with: a) locks b) hooks c) sliders (d) all of the above

d) all of the above

16. How to form a threshold according to Lustig:

A small round burr outlines the preparation boundary in the area of the splint. With a torpedo drill, butt without sawing, the circumferences are taken away walls parallel to the longitudinal tooth axis.

17. Write the formula for the constant ratio between occlusal and periodontal area:

𝐹𝑜/ 𝐹𝑝 = 𝐾

18. What is meant by dental occlusion:

Condition of static contact between the teeth of the upper and lower jaw. Characterizes a fixed state between the dentitions.

19. Describe the defects of the impression in the bite (occlusal impression):

Thin silicone layer can be pierced, affecting occlusal accuracy.

20. What does the periodontium consist of:

Bundles of collagen fibres, blood and lymph vessels, nerve endings, and cells

1. The incisors and canines in the upper jaw with permanent dentition form: a) part of the ellipse b) part of a circle c) strictly individual configuration d) straight line

a) part of the ellipse

2. In the case of computer machine-milled metal crown is missing technological stage: a) wax modeling b) stuffing c) radiation d) adjustment

a) wax modeling

3. Without soldering between two bodies is carried out: a) monolithic casting b) model casting c) autogenous welding (d) all of the above

c) autogenous welding

4. To establish the quantitative characteristics of the periodontal Sustainability is a method called: (a) chewing coefficients b) phonography c) electromyomastication d) gnotodynamometry

d) gnotodynamometry

5. With the metal-ceramic crowns with occlusal metal stops is achieved: a) good prophylactic effect b) higher mechanical strength qualities c) good aesthetic effect (d) all of the above

b) higher mechanical strength qualities

6. Hook № 2 according to the Ney system is recommended for: a) front teeth b) molars only c) smaller teeth (premolars) d) there is an indication for all tooth groups from the upper and lower dentition

d) there is an indication for all tooth groups

7. Which profile of the bridge body does not find practical application: a) high b) saddle-shaped c) standing d) tangential

d) tangential

8. In the wax-immersion technique, the tooth stump is insulated with varnish coating to: (a) facilitate the adjustment of the finished crown b) provide space for the adhesive cement c) economy wax d) obtaining a better connection between the wax and the stump;

b) provide space for the adhesive cement

9. Which of the following elements does not belong to the partial prosthesis: a) prosthetic plaque b) prosthetic body c) tangential profile d) chewing complex

c) tangential profile

10. In perfect occlusion there is no: (a) prior contact b) pathological changes in the periodontium c) pathological changes in the maxillofacial muscles (d) all of the above

d) all of the above

11. The ratio of clinical crown - root is judged for: a) the functional capabilities of the tooth and the presence of reserve forces b) tooth abrasion c) the strength of the traumatic irritation on the tooth d) manifestation of the Godon phenomenon

a) the functional capabilities of the tooth and reserve forces

12. In intact teeth and normal periodontium, the reflex arc starts from: a) circular ligament b) periodontal receptors c) from the tip of the tooth root d) from the alveolar bone

b) periodontal receptors

13. The gingival boundaries of the lingual and proximal surfaces of SOC-fasteners should be placed only on the enamel of: a) 1 mm from the dental neck b) 1.5 mm from the dental neck c) 2 mm from the dental neck d) 0.5 mm from the dental neck

d) 0.5 mm from the dental neck

14. When there is no pronounced preparation limit, the coronal margin enters in the gingival sulcus: a) 0.3 - 0.5 mm b) 0.5 - 0.7 mm c) 1 mm d) does not enter the gingival sulcus

a) 0.3-0.5 mm

15. The operating arm of the hooks on Kemeni has: a) profile G b) the profile depends on which tooth it is constructed on c) T-shaped profile d) round profile

b) the profile depends on which tooth

16. In skeletal mole-cast prostheses, mucosal surfaces are insulate with wax, in which areas and with what thickness:

Torus 1 mm; clasp 0.25 mm; saddles 1 mm.

17. In the treatment of pin crown and pin tooth stump strongly destroyed teeth, how the occlusal root surface is formed

The occlusal root surface is formed at an angle of 160 ° to the vestibular and ligamentous halves; slope only of the vestibular half; horizontal level of the ligamentous plane and vestibular slope of both halves. Ring road with threshold.

18. List the most characteristic features of the upholstered metal crown wax cap

Single casting; is performed in one laboratory stage.

19. In the case of articulators with average values, the values of which parameters:

Condylation guide angle - 33 °; angle of incisive guidance - 40 °; Angle of Bennett - 17 °; Gothic angle - 120 °.

20. The second laboratory stage for partial dentures includes:

Making a plaster model; laboratory planning and delineation of construction; for plastic prostheses - making hooks and wax templates, and for model-cast prostheses - making the metal skeleton.

1. In case of model casting, a duplicate model shall be made from: a) universal mass b) silicon mass c) duplicate mass d) packing table

c) duplicate mass

2. The levers are similar to cast hooks, but have mainly: a) blocking effect b) support effect c) restrained effect d) retention effect

d) retention effect

3. The most accurate working model can be made by: (a) using additive silicones b) ring system c) electroplating (d) using thermoplastic materials

c) electroplating

4. The distance between the sawn tooth stump and the inner surface of the crown is: a) 0.025 mm b) 0.1 ÷ 0.6 mm c) 1 ÷ 2 mm d) 0.05 ÷ 0.1 mm

b) 0.1 ÷ 0.6 mm

5. To establish the quantitative characteristics of the periodontal Sustainability is a method called: a) gnathodynamometry b) chewing coefficients c) Gelman's sample d) Rubinov's test

a) gnathodynamometry

6. The clinical crown-root ratio is judged by: a) manifestation of the Godon phenomenon b) the functional capabilities of the tooth and the presence of reserve forces c) tooth abrasion (d) all of the above

b) the functional capabilities and reserve forces

7. When during articulation of the lower jaw contacts occur between single teeth, these contacts are called: a) main contacts b) C-contacts c) A-contacts d) preliminary contacts

d) preliminary contacts

8. The angle that connects the transverse path of the joint with the sagittal plane, is called and has a value: a) Bennett's angle 15-17 ° b) Ackerman angle 18-28 ° c) Giza angle 40 - 50 ° d) condylar angle 35 °

a) Bennett's angle 15-17°

9. How many seconds does the recovery period last, in case of deformation of periodontal fibers and alveolar bone according to Kulikov: a) 45-90 seconds b) 5-6 seconds c) more than 2 minutes (d) no recovery occurs

a) 45-90 seconds

10. After complete edentulousness in the advanced phase, the distance between alveolar ridges reach: a) 15 mm b) 30 mm c) 45 - 48 mm d) 60 - 70 mm

c) 45-48 mm

11. The micromovements of each tooth in the dental alveolus during chewing function, lead to: a) appearance of wedge-shaped defects b) evolution of contact points c) formation of balanced occlusal veneers d) microglenoid

b) evolution of contact points

12. To perform their retention function with what they are combined rectangular sleepers: a) the model hook b) levers c) kipmiders d) anchoring devices

d) anchoring devices

13. When preparing cutters for ½ crown, the formed horizontal chute divides the cutting edge into vestibular and lingual: a) lingually it is 2 times bigger than the vestibular one b) the lingual and vestibular are of equal width c) the vestibular is 2 times wider than the lingual d) there is no strict design rule

c) the vestibular is 2× wider

14. For the extraoral determination of the condylar slope, the following shall apply: a) Christensen's method b) the Giza method c) Ackerman's Helicoid d) facial arch

a) Christensen's method

15. How is the incisive guidance angle measured: a) intraorally b) extraorally c) with a facial arch (d) not measured

a) intraorally

16. What is the correct position of the lower seventh tooth when arranging the teeth for whole Gerber dentures:

The distal tubercle does not exceed the tridonum retromolarae.

17. Describe the buttresses of the lower jaw:

From the chin to the dog's tooth; in the area of the mandibular angle; from the mandibular angle to the processus condylaris and to the processus muscularis; the body of the lower jaw is reinforced by l. oblique, l. buccinatoria, l. mylohyoidea.

18. In the case of partial crowns, where is the threshold formed?:

Only lingually, supragingivally in the neck area.

19. Describe the hook of Kemeni:

Tooth-alveolar hooks - plastic hooks that have more massive arms than metal and represent a continuation of the prosthetic plaque. They have a T-shape shape and have only a retaining function.

20. Which constructions do we call splints?:

Structures with which they are restored simultaneously with the splinting the morphological and functional integrity of the dentition

write correct answers for these questions and highlight the incorrect ones 1. Pile restraint shall be used for: a) upper jaw b) lower jaw c) in retention zones d) severe atrophy

c) in retention zones

2. Wax shafts are high and wide around: a) depends on the atrophy b) 10 mm c) yes 15 mm d) depends on resilience

a) depends on the atrophy

3. The stability of the partial prosthesis in case of a unilateral unlimited defect is directly proportional to: (a) the length of the reference line b) the length of the resistance arm c) the length of the perpendicular (d) the length of the lever arm

a) the length of the reference line

4. During the model casting a duplicate model is made from: (a) packing mass b) silicon mass c) universal table d) duplicate mass

d) duplicate mass

5. The tooth stump sawn for the enveloping crown is the widest in: a) occlusal b) the neck c) the equator d) the sub-equator

c) the equator

6.At what angle (relative to the longitudinal tooth axis) are prepared the circumferential walls of the tooth stump for the crown? a) irrelevant b) 2 o - 6 o c) always at right angles d) 12 о - 16 о

b) 2°-6°

7. At rest, the periodontal fibers are: a) S-shaped curved b) at right angles c) at an obtuse angle; d) at the angle of Bennett

a) S-shaped curved

8. In the case of the upper first molars, the place of division of the roots is called: a) trifurcatio dens molaris superior primus b) trifurcatio coronae dentis c) trifurcatio radicis dentis d) trifurcatio canalis dentis

c) trifurcatio radicis dentis

9. The shape of the root of the upper central incisor is: a) trapezoidal in shape b) with a biconcave shape c) with an oval cross section d) with elongated prismatic shape

c) with an oval cross section

10. The levers are similar to the cast hooks, but have mainly: a) support effect b) blocking effect c) restrained effect d) retention effect

d) retention effect

11. The side walls of the air chamber are vertical with a depth of: (a) the susceptibility of the mucosa b) 3-5 mm (c) the size of the valve area d) about 1 mm

a) the susceptibility of the mucosa

12. The angle that connects the transverse path of the joint with the sagittal a plane is called; and has a value of: a) Gothic angle - 120 o b) condylar angle - 35 o c) incisal angle - 40-50 o d) Bennett's angle - 15-17 o

d) Bennett's angle - 15-17°

13. The sagittal compensation curve compensates for: (a) the difference between tuberculous and articular slopes b) the difference between the Gothic angle and the Bennett angle (c) the difference of мо premolar width in molars above and below (d) the difference between the tubercular inclinations and the inclination of the incisors

a) the difference between tubercular and articular slopes

14. The stages of the articulatory cycles of biting and grinding begin and end in: a) central rotation b) central occlusion c) central translation d) central articulation

b) central occlusion

15. In model flying structures after duplication the refractory model is hardens by: (a) silanized packing material b) silicate packaging mass c) silicone packaging mass d) wax rosin mixture

b) silicate packaging mass

16. What material is the main foil of the Adapta system made of and on what distance is cut from the preparation boundary:

Polypropylene; 0.5 mm above the preparation limit.

17. What is the basic principle of the Adapta system?:

Making a model of hard plaster with removable stumps. Adaptation of the cap of thermoplastic synthetic material burning without residue.

18. Arrange the vestibular tubercles to the lower sixth tooth:

Mediovestibular, distovivestibular, distal.

19. What device is used for extraoral determination of condyloma slope? Describe its characteristic features:

Facial arch, which consists of two side arms to which they are mounted writing blades aimed at the face in the areas of both condyloma. The two arms are connected in a common arc by a third arm, which through a special device is fixed to the wax shaft of the lower jaw.

20. List three characteristic features of the global and orbital vertical:

They are designed in profile; the glabella passes through the glabella and subnasalae; the orbital is further back and parallel to the global; both are perpendicular to The Frankfurt plain.

1. The singular at the incisors is designed (a) along the cutting edge b) on the proximal surfaces c) on the vestibular surface d) on the lingual surface

a) along the cutting edge

2. In the case of a ridge bite, the front teeth: a) contact edge to edge and the lateral teeth are in orthonotic ratio b) the upper frontal overlap the lower frontal teeth c) the lower front teeth overlap the upper front teeth d) the front teeth are not in contact, the lateral lower teeth overlap the above

a) contact edge to edge and the lateral teeth are in orthonotic ratio

3. When tilting the teeth, the load is: (a) evenly in the different zones b) uneven and has a different effect in different areas (c) the load does not change d) all of the above

b) uneven and has a different effect in different areas

4. Medium articulators can be used for: (a) only for pin construction b) only in the case of sheath crowns and veneers c) all prostheses with large and small chewing surfaces d) are not used in the manufacture of prosthetic structures

c) all prostheses with large and small chewing surfaces

5. The measure is: a) value of the shape of the tooth b) value of the shape of the face c) value of the length and shape of the dentition d) modern quantitative indicator

c) value of the length and shape of the dentition

6. On the upper large molars in drip-wax modeling are required: a) 45 stages b) 72 stages c) 23 stages d) 22 stages

b) 72 stages

7. For a full envelope crown with a circumferential sill, the edge of the crown reaches the pre-polished threshold, which is: (a) at the level of the equator b) above the gingival margin c) at the level of the gingival margin (d) all of the above

d) all of the above

8. The direct imprint for a pin stump shall be taken with: a) with wax (b) wax sealed with a factory metal pin (c) wax sealed with a plastic pin (d) all of the above

d) all of the above

9. The best prosthetic construction with SOC-retainer is obtained: a) by the method of model casting b) by the ADAPTA method c) immersion technique (d) all of the above

a) by the method of model casting

10. A single chewing complex means: a) prosthetic body b) the set of natural and artificial teeth that make up the whole of the dentition c) artificial teeth d) prosthetic plaque

b) the set of natural and artificial teeth

11. Hook № 1 according to the system It is used when: (a) the equator is located more gingivally on the side of the hook body b) the equator of the tooth is located more occlusally c) the equator is designed highly occlusal (d) there is no strict rule for its application

a) the equator is located more gingivally

12. The Seka lock consists of: (a) a miniature finger matrix b) spring patrix c) a) and b) d) only from spring spring.

c) a and b

13. When packing the prostheses in the cuvette it is necessary: (a) Insulate the model with Vaseline (b) the modeled prosthesis together with the model shall be tested at the bottom of ditch (c) no preparation is required (d) The modeled prosthesis and the model shall be tested at the top of the cuvette

a) Insulate the model with Vaseline

14. The Gothic angle is registered: a) intraorally b) extraorally c) with a facial arch d) by the method of Christensen

a) intraorally

15. Patrices of cylindrical joints have: (a) freedom of movement b) two freedoms of movement c) T-shaped profile d) V-shaped profile

a) freedom of movement

16. List the successive stages of mechanical cleaning of metal structures:

It is processed in a sandblasting machine; rough cleaning with carbide cutters and drills, followed by treatment with carborundum stones; fine smoothing with erasers.

17. List the difficulties, inconveniences and weaknesses in using put:

Sawing the bearing teeth and dressing them in complex crowns constructions; complicated clinical and laboratory technologies; are made factory and are expensive; with prolonged use they wear out, and the retention effect weakens or disappears completely.

18. The index for the shape of the face MEO-Yes is:

Refers to the mathematical relationship between the determining width and height dimensions of the mimic expressive area, which has unchanged pentagonal contour.

19. Write the averages fixed in an articulator with a mean value:

Condylation guide angle 33 °; angle of incisive guidance - 40 °; Angle of Bennett - 17 °; Gothic angle - 120 °.

20. The elementary physiological unit of the chewing act (Rubinov 1965(d) - the chewing unit consists of:

Supporting part (tooth, periodontium, bone); motor part (muscles); nervous regulating part (sensory and motor innervation); trophic part (blood vessels and trophic nerve)