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Theme Orgniztionl principles of work t the Prosthetic Dentistry Deprtment

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Tests for 2 course autumn term

1 theme

Organizational principles of work at the Prosthetic Dentistry Department.  

Equipment of the dental clinic and laboratory. Learning of dental clinic organizing, documents conducting, usage of instruments and materials. Learning with dental technician place of working and laboratory special rooms: gypsum room, polishing room, casting laboratory. Accident prevention.

  1.  What is the function of prosthodontist from mentioned below?
  2.  *restoration of dental arches with missing teeth
  3.  treatment of dental hard tissues diseases
  4.  orthodontic treatment of bite
  5.  teeth extraction

  1.  What is the function of dental technician from mentioned below?
  2.  *denture base manufacture
  3.  tooth preparation
  4.  impression making
  5.  selective grinding of teeth
  6.  try-in of a crown in an oral cavity

 

  1.  Name dental examination hand instruments:
  2.  *Mirror, probe, pliers
  3.  probe, excavator, pliers
  4.   pliers, probe, mirror, spatula
  5.  Excavator, probe, mirror, pliers
  6.  Spatula, mirror, pliers

  1.  What is the necessary square of dental room for one working place?
  2.  *14 s.m.
  3.  10 s.m.
  4.  20 s.m.
  5.  21 s.m.
  6.  25 s.m.

5. Handpieces and associated cutting and polishing instruments developed as two basic types:

  1.  *Straight and angle
  2.  Turbine and  mechanical
  3.  Pneumatic and electric
  4.  Air-driven and water-driven
  5.  Electric and mechanical

  1.  What is not the method of sterilization:
  2.  *Ultrasonic
  3.  Steam pressure sterilization (autoclave)
  4.  Chemical vapor pressure sterilization (chemiclave)
  5.  Dry heat sterilization (dryclave)
  6.  Ethylene oxide sterilization

  1.  Main document of prosthodontic patient is:
  2.  *dental clinical record
  3.  health questionnaire
  4.  ambulance record
  5.  laboratory requisition
  6.  appointment card

  1.  What is the type of impression sterilization?
  2.  *chemical
  3.  air
  4.  steam
  5.  ultrasonic

  1.  Copp’s apparatus serves for:
  2.  *removal crowns from teeth
  3.  determining of lip’s height
  4.  hand separation of teeth
  5.  dissection of crowns

  1.  How many dental technicians for one operator in Ukrainian labor laws?
  2.  *2
  3.  1
  4.  3
  5.  0,5
  6.  1,5

  1.   There are six instruments in the main tray. Which instrument is used for mixing of dental material?
  2.  *spatula
  3.  pincers
  4.  probe
  5.  condenser
  6.  smother

  1.   Stages of instruments disinfection by Governmental Regulations:
  2.  *disinfection, cleaning before sterilization, sterilization
  3.  cleaning before sterilization, sterilization, disinfection
  4.  cleaning before sterilization, disinfection, sterilization
  5.  sterilization, disinfection, cleaning before sterilization
  6.  sterilization, cleaning before sterilization, disinfection

  1.   There are six instruments in the main tray. Which instrument is used for oral and teeth inspection?
  2.  spatula
  3.  mirror
  4.  probe
  5.  condenser
  6.  smother

  1.   There are six instruments in the main tray. Which instrument is used determination of tooth mobility and for cotton rolls insertion?
  2.  *Pincers
  3.  Spatula
  4.  Probe
  5.  Condenser
  6.  Smoother

  1.  Dental unit need to be grounded. How it can be done?
  2.  *through ground cable
  3.  connect ground cable to radiator
  4.  connect ground cable to another dental unit
  5.  connect ground cable to dental chair

  1.  After teeth preparation burs are disinfected in open dish under dry hot air during an hour at temperature:
  2.  *180°C
  3.  160°C
  4.  100°C
  5.  120°C
  6.  140°C

  1.  Separating disks are disinfected in closed glass dish during 30 minutes. Which solution is used for it?
  2.  *1,5% sol. lyzoformine 3000
  3.  0,5% chloramine B
  4.  5% sol.lyzoformine 3000
  5.  3% sol. hydrogen peroxide
  6.  Sol.furacilin 1: 5000

  1.  Alginate impressions are disinfected during 3 minutes immersing into such solution:
  2.  *0,5% sodium hypochlorite
  3.  sol. on a base of paraformaldehyde
  4.  0,2% sol. ”Dezoxon-1”
  5.  2% sol.”Dichlorine-1”
  6.  3% sol. hydrogen peroxide

  1.  Nurse is going to prepare gypsum for impressions making. Which instrument is used for it?
  2.  *metal spatula
  3.  smoother
  4.  plastic spatula
  5.  condenser

  1.   Nurse is going to prepare zinc phosphate cement for metal crowns cementation. Which surface is used for mixing of this material?
  2.  *glass
  3.  metal
  4.  paper
  5.  plastic
  6.  bony

 

THEME 2.

Biomechanical consideration of articulation. Dentofacial system: masticatory muscles, neuromuscular mechanism, and temporomandibular joint. Coordination the reflex actions.  Adaptation mechanism.

1. What muscles protrude lower jaw?

  A) *two-side contraction of lateral pterygoid muscles;

  B) one-side contraction of lateral pterygoid muscles;

  C) two-side contraction of digastric muscle;

  D) two-side contraction of medial pterygoid muscles;

  E) one-side contraction of medial pterygoid muscle;

2. What muscles upward lower jaw?

  A) *temporalis muscle, masseter muscle, medial pterygoid muscle;

  B) temporalis muscle, masseter muscle, lateral pterygoid muscle;

  C) mylohyoid, digastric, temporalis;

  D) temporalis, medial pterygoid, geniohyoid, mylohyoid;

  E) masseter, digastric, lateral pterygoid.

3. Name the basic  masticatory muscles:

   A) *temporalis, masseter, medial pterygoid, lateral pterygoid;

   B) temporalis, masseter, medial pterygoid;

   C) digastric, temporalis, masseter;

   D) temporalis, masseter, lateral pterygoid.

   E) m.masseter and m.temporalis.

4. What movements of lower jaw does temporomandibular joint (TMJ) perform?

            A) *vertical, lateral and forward;

            B) vertical and horizontal;

            C) vertical, lateral and backward;

            D) horizontal and lateral;

            E) forward, backward, lateral.

5. Anatomic incongruence of TMJ exists due to:

           A) *inconsistency between articular surfaces;

           B) correspondence of condyles;

           C) articular disc;

           D) synovial fluid;

           E) synovial cell.

6. What is the basic theory of masticatory system biomechanics?

         A) *theory of articular equilibrium of Godon;

         B) theory of relative physiological equilibrium of A.Ya. Katts;

         C) theory of Gyzi;

         D) laws of Bonwill;

         E) relativity theory;

7. Determine the component parts of masticatory system:

          A) *upper and lower jaws, teeth, masticatory muscles, TMJ, dental arches;

          B) upper and lower jaws, periodontium, mimic muscles, masticatory muscles;

          C) teeth, upper and lower jaws, glands;

         D) muscles, TMJ, teeth, tongue;

         E) tongue, cheeks, hard and soft palate, teeth, upper and lower jaws.

8. Name muscles which move lower jaw downward:

      A) *geniohyoid, mylohyoid, anterior belly of digastric;

      B) sternocleidomastoid, omohyoid, temporalis;

      C) genioglossal,  greater zygomatic, genoid, mylohyoid muscle;

      D) orbicularis oris, medial pterygoid, stylohyoid muscle;

      E) posterior belly of digastric, glossopharyngeal, sternohyoid;

9. Name component parts of TMJ:

     A) *condyle of mandible, glenoid fossa of temporalis muscle, articular disc;

     B) coronoid process of mandible, glenoid fossa of temporalis muscle, articular disc;
     C) condyle of mandible, TMJ capsule, articular disc;

     D) pterygopalatine fossula, coronoid process of mandible, articular disc;

     E) articular eminence of coronal bone, articular disc, articular capsule, glenoid fossa of temporalis muscle;

10. Shock-absorbing function of periodontium consists of such elements, except:

      A) *reflex adjusting of masticatory pressure;

      B) pressure distributing on the alveolar wall;

      C) pressure distributing on the bottom of alveolar;

      D) damping of masticatory contractions;

      

11. Shock-absorbing function of periodontium is performed by such elements except for:

      A) *reflex adjusting;

      B) directions of  collagen fibers;

      C)  properties of collagen fibers;

      D) vascular plexus;

      E) nervous plexus;

12.  Periodontium endurance to the functional loadings determined by the followings moments, except for:

        A) *pulp state;

        B) states of vessels and connective-tissue structures;

        C) physical exercises;

        D) age;

        E) size of root surface.

13. Absolute force of masticating pressure is:

       A) *tension, developed by muscles at maximal contraction

       B) force, developed by muscles at closing of teeth in central occlusion

       C) quantity of masticatory pressure which muscles can develop

       D) quantity of masticatory muscles contraction

       E) masticatory muscles force in lateral occlusion

14. Masticatory pressure is:

        A) *force which is developed by muscles lifting a lower jaw and operating on a certain area;

        B) tension which is developed by muscles at closing of teeth in central occlusion;

        C) absolute force of masticatory muscles for given person;

        D) quantity of masticatory muscles contraction;

        E) pressure of teeth-antagonists;

15. Masticatory pressure is measured by the following device:

            A) *gnatodynamometer (occlusometer);

            B)  face-bow (hinge-bow);

            C)  masticatory tests;

            D)  myograph;

            E)   oscillograph;

16. The indexes of masticatory pressure depend on the followings moments, except for:

            A) *preparation of tooth to the inspection;

            B) age;

            C) degree of periodontium training;

            D) endurance of periodontium;

            E) character of lower jaw activity;

17. What structures is pressure from this tooth passed to adjacent by?

            A) *by aproximal teeth contacts;

            B) by the circular ligament of tooth;

            C) through an alveolar process;

            D) through periodontium tissues;

            E)  by periodontium.

18. The state of physiological rest is characterized by the followings signs, except for:

A) *teeth are closed;

B) lips are closed;

C) masticatory muscles are broken;

D) a mouth is opened slightly;

E) a fissure between frontal teeth of 2-3 mm;

19.  Gingivo-muscular reflex appears at:

A) *absence of teeth;

B) functional states, related to contraction of masticatory muscles;

C) mastication by natural teeth;

D) the trauma of masticatory muscles;

E) TMJ disease;

20. The cause of bruxism is:

A) *hypertone of masticatory muscles;

B) pathological attrition of teeth;

C) endocrine disease;

D) innate functional  inferiority of masticatory muscles;

E) disease of parathyroid glands;

THEME 3

Teeth, dental arches, bite. Description of orthognatic bite (signs of all dental arch, frontal teeth, lateral teeth). Physiological types of orthognatic  bite.

1. Distinguish the crown of the tooth (2 answers):

A)* anatomic;

B) *clinical;

C) biological;

D) physiological;

2. The upper dental arch of the permanent teeth has a form of:

A) *semiellipse;

B) parabola;

C) trapezoid;

D) semicircle;

3. The lower dental arch of the permanent teeth has a form of:

A) *parabola;

B) semiellipse;

C) trapezium;

D) semicircle

4. What is the relation of dental arches?

A) *upper is wider than lower;

B) lower is wider than upper;

C) identical;

D) right side of upper is wider;

5. Unity of dental row is NOT provided by:

A) *masticatory muscles;

B) interdental contacts;

C) alveolar process;

D) parodontium;

6. There is NO such curve in prosthetic dentistry:

A) *parodontal;

B) apical;

C) alveolar;

D) dental;

7. The occlusal surface of dental arches is:

A) *surface which passes through masticatory cusps and cutting edges of teeth;

B) surface which passes only through the masticatory cusps of teeth;

C) plane which passes from the buccal cusp of first premolar to the distal buccal cusp of third molar;

D) surface which passes only through cutting edges of teeth;

8. Closing of teeth - is:

A) *occlusion;

B) central occlusion;

C) bite;

D) cusp-fissure contact;

9. There are such structures of occlusal surface as:

A. *tops and slopes of cusps, central fossa and fissures between cusps, marginal ridges.

B. abutment cusps, central fossa and fissures between cusps, marginal ridges.

C. cusp of teeth, marginal ridges, central fossa and fissures between cusps.

10. In anterior occlusion:

A. *condyles drift forward and locate at a top of articular eminence

B. condyles drift backward and locate at a base of articular eminence

C. condyles drift to the right and locate at a base of articular eminence

D. condyles drift to the left and locate at a base of articular eminence slightly rotating

11. Lateral occlusion occurs when:

A. *translational motions of mandible to the left or to the right

B. motion of mandible backward

C. motion of mandible forward

D. blocking of mandible

12. Bite is:

A. *type of teeth contacts in central occlusion

B. type of teeth contacts in frontal occlusion

C. type of teeth contacts in lateral right occlusion

D. type of teeth contacts in lateral left occlusion

13. Non physiological bite is:

A. *Deep bite

B. Direct bite

C. Orthognathic bite

D. Opisthognathic bite

E. Physiological prognathic bite

14. Non pathological bite is:

A. *direct bite

B. progenic bite

C. prognathic bite

D. deep bite

E. cross-bite

15. Cusp-to-cutting edge contact is :

A. *cutting edges of lower frontal teeth contact with cusps of upper teeth

B. cutting edges of upper frontal teeth contacts with lower teeth cusps

C. lower and upper frontal teeth contact by cutting edges

D. lower and upper frontal teeth contact only by their cusps

16. Direct bite is:

A. *cutting edges of upper frontal teeth don’t overlap the same lower teeth – they contact edge-to-edge

B. cutting edges of upper frontal teeth overlap the same lower teeth

C. cutting edges of lower frontal teeth overlap the same upper teeth

D. only lateral teeth have contacts

17. Prognathic bite is:

A. *protruded position of upper jaw

B. protruded position of lower jaw

C. deep overbite of lower jaw by upper jaw and absence of cusp-to-cutting edge contacts

D. disocclusion of frontal teeth and contacts between molars

18. Progenic bite is:

A. *protruded position of lower jaw

B. protruded position of upper jaw

C. deep overbite of lower jaw by upper jaw and absence of cusp-to-cutting edge contacts

D. disocclusion of frontal teeth and contacts between molars

19. Open bite is:

A. *disocclusion of frontal teeth and contacts between molars

B. protruded position of upper jaw

C. deep overbite of lower jaw by upper jaw and absence of cusp-to-cutting edge contacts

D. protruded position of lower jaw

20. Deep bite is:

A. *deep overbite of lower jaw by upper jaw and absence of cusp-to-cutting edge contacts

B. protruded position of upper jaw

C. protruded position of lower jaw

D. disocclusion of frontal teeth and contacts between molars

THEME 4

Temporomandibular joint (TMJ). Structure, main elements. Connecting of TMJ with the scull. Types of joints (rodent, predator, ruminant). Correlation between shape and function of TMJ. Articulation and occlusion. Biomechanics of mandibular movements (vertical, sagittal, transversal movements).

1. What is the motion of lower jaw, at which both condyles simultaneously displaced forward, named?

A) *protrusion;

B) laterotrusion;

C) mediotrusion;

D) occlusion;

E) bruxism.

2. What is the motion of lower jaw, at which it deviates outward from a central sagittal plane, named?

A) *laterotrusion;

B) protrusion;

C) mediotrusion;

D) occlusion;

E) bruxism.

3.   What is the motion of lower jaw, at which it moves to the central sagittal plane, named?

A) *protrusion;

B) laterotrusion;

C) mediotrusion;

D) occlusion;

E) bruxism.

4.  What is the way of lower incisors on the palatal surface of upper incisors at motion of lower jaw from central occlusion into anterior named?

A) *sagittal incisor path;

B) lateral incisor path;

C) sagittal articular path;

D) lateral articular path;

E) motion of Bennett.

5. The size of sagittal incisor path angle is:

A) *40° - 50°;

B) 15° - 17°;

C) 20° -40°;

D) 100° - 110°;

E) 120° – 130°.

6. What is the distance, which a condyle passes at the protrusion of lower jaw, named?

A) *sagittal articular path;

B) lateral articular path;

C) motion of Bennett;

D) transversal incisor path;

E) sagittal incisor path.

7. The size of sagittal articular path angle is:

A) *20° - 40°

B) 10° - 20°

C) 40° - 50°

D)  50° - 70°

E) 100° - 110°

8. Condyles location in central occlusion:

A) *at foundation of articular prominence;

B) at foundation of articular prominence, upper and backward;

C) on the top of articular prominence;

D) on the slope of articular prominence;

E) at the base of articular prominence.

9. Articular heads in position of anterior occlusion locate:

A) *locate on the top of articular prominence or near-by it;

B) at foundation of articular prominence;

C) at foundation of articular prominence, upper and backward;

D) locate on the slope of articular prominence;

E) at foundation of articular prominence, displaced inward;

10. At the transversal moving of lower jaw an articular head on the side of contracted lateral pterygoid muscle is:

A) *moving downward, forward and inward;

B) moving downward and forward;

C) moving downward;

D) moving downward and inward;

E) remains at foundation of articular tubercle.

11. At the transversal motion of lower jaw an articular head of the opposite side a lower jaw moves in is:

A) *remains at foundation of articular prominence;

B) moving downward, forward and inward;

C) moving downward and inward;

D) moving downward;

E) moving downward and forward;

12. What is the occlusal curve, passing from incisors to the distal cusps of third molar named?

A) *sagittal curve;

B) transversal curve;

C) horizontal curve;

D) vertical curve;

E) parasagittal curve;

13. What is the occlusal curve, passing through the masticatory surfaces of right and left molars in lateral direction named?

A) *transversal;

B) sagittal;

C) vertical;

D) horizontal;

E) parasagittal.

14. Closing of dental arches or separate groups of opposite teeth is:

A) *occlusion;

B) articulation;

C) rotation;

D) contraction;

E) bruxism;

15. Closing of dental arches with maximal intercuspation is:

A) *central occlusion;

B) anterior occlusion;

C) lateral occlusion(right);

D) lateral occlusion (left);

E) posterior occlusion;

16. What is the relation between dental arches in central occlusion named?

A) *bite;

B) mediotrusion;

C) protrusion;

D) laterotrusion;

E) bruxism.

17. What do the cuttings edges of frontal teeth and masticatory surfaces of molars and premolars form?

A) *occlusal plane;

B) occlusal surface;

C) lingual surface;

D) palatal surface;

E) labial surface.

18. What is the dental arch shape of maxilla?

A)*ellipsoid;

B) paraboloid;

C) sinewave;

D) tangential;

E) cosinusoid.

19. What is the shape of lower dental arch?

A) *paraboloid.

B) sinewave;

C) tangential;

D) cosinusoid;

E) ellipsoid;

20. What are the anatomic peculiarities of TMJ structure (mark two answers):

           A) *incongruence;

           B) *presence of articular disk;

           C) absence of articular disk;

           D) absence of articular prominence;

           E) absence of joint space .

21. Which muscles trace condyle and disk upward?

A) *temporalis, masseter, medial pterygoid.

B) masseter, temporalis, lateral pterygoid

C) medial pterygoid, lateral pterygoid, temporalis

D) medial pterygoid, temporalis

22. Which muscle traces condyle forward?

A) *inferior lateral pterygoid

B) temporalis

C) medial pterygoid

D) superior lateral pterygoid

E) masseter

Theme 5

Impression materials and impressions classification. Steps of impression making using different impression materials. Requirements to impressions. Troubleshooting. Requirements to impression materials

  1.  Which types of impression techniques do you know?
  2.  *One stage single mix
  3.  *One stage double mix
  4.  *Two stage double mix
  5.  Two stage single mix

  1.  Which of the following impression materials are double mixed?
  2.  *Silicone
  3.  Reversible hydrocolloids
  4.  Zinc oxide-eugenol
  5.  Irreversible hydrocolloids
  6.  Polyethers

  1.  Gypsum impression withdrawal starts from:
  2.  *separating tray from impression
  3.  distal areas
  4.  anterior areas
  5.  simultaneous
  6.  nothing mentioned above

  1.  In order to get gypsum impression from the mouth doctor should:
  2.  *brake it
  3.  pull it
  4.  there is no difference
  5.  wet it
  6.  do nothing

  1.  Impressions taken by elastic materials should be:
  2.  *pulled
  3.  broken
  4.  there is no difference
  5.  wet
  6.  done nothing

  1.  Functional impression allows NOT to get results:
  2.  *accurate reflection of teeth and interdental spaces
  3.  determination of optimal relation of denture borders to oral tissues
  4.  differential distribution of masticatory load under future denture
  5.  compression of mucosa
  6.  nothing above

  1.  Technique of anatomic impression taking DOES NOT consist of:
  2.  *forming of impression borders by movements of cheeks, lips, tongue
  3.  choice of tray
  4.  impression material preparation
  5.  tray filled with material insertion
  6.  tray withdrawal

  1.  Impression is done properly if it is NOT required to the following:
  2.  *fuzzy reflection of oral structures
  3.  no contours of interdental spaces
  4.   no pores
  5.  All pieces of gypsum are present
  6.  Clear reflection of palate and frenum

  1.  Patient 60 year-old, came with a purpose of prosthetics. Objectively: partially edentulous upper jaw, 42, 41, 31, 33 teeth have 1-2 level of mobility. The patient is indicated to manufacture partial removable denture for the lower jaw. Which impression material is better to use?
  2.  *Stomalgin (alginates)
  3.  Stens (impression compounds)
  4.  Gypsum (plaster)
  5.  Sielast (silicone-C)
  6.  Ortokor (impression compounds)

  1.  Patient, 53 year-old, is manufactured partial removable denture for the upper jaw. Objectively: only 23 is present. 23 is covered by full metal crown, has 1 level of mobility. Impression from the upper jaw will be taken by elastic impression material. Which impression tray should be chosen?
  2.  *perforated stock tray
  3.  wax custom tray
  4.  stock tray without perforations
  5.  individual stock tray
  6.  hard custom tray

  1.  Which group of impression material does “Dentaflex” belong?
  2.  *silicones
  3.  plaster
  4.  impression compounds
  5.  polyethers
  6.  alginates

  1.  Types of impression trays (mark 2 answers):
  2.  *stock
  3.  *custom (individual)
  4.  diagnostic
  5.  personal
  6.  working

  1.  Types of casts (mark 3 answers):
  2.  *auxiliary
  3.  *working
  4.  *diagnostic
  5.  stock
  6.  personal

  1.  Types of impressions that do NOT exist:
  2.  *stock
  3.  working
  4.  diagnostic
  5.  functional
  6.  auxilliary

  1.  Which group of impression material does gypsum belong?
  2.  *plaster
  3.  impression compound
  4.  polyether
  5.  silicone
  6.  alginate

  1.  Which group of impression material does Ypeen belong?
  2.  *alginates
  3.  plaster
  4.  impression compounds
  5.  polyethers
  6.  silicones

17. Which group of impression material does Stens belong?

  1.  *impression compounds
  2.  plaster
  3.  polyethers
  4.  silicones
  5.  alginates

  1.  Which of the following impression materials has the greatest setting time?
  2.  *Polysulphides
  3.  Reversible hydrocolloids
  4.  C-Silicones
  5.  Polyethers
  6.  A-silicones

  1.  Which of the following impression materials is radiolucent?
  2.  *Polysulphides
  3.  Reversible hydrocolloids
  4.  C-Silicones
  5.  Polyethers
  6.  A-silicones

  1.  What is the distance from impression tray border to teeth (in mm)?
  2.  *3-5
  3.  1-2
  4.  6-8
  5.  9-11

THEME 6

  1.  Stens-03 belongs to the following group of impression materials:
  2.  *Impression compounds
  3.  Alginates
  4.  Impression plaster
  5.  Silicones
  6.  Polyethers

  1.  The setting temperature of Stens is:
  2.  *35 º С.

    B. 30 º С.

    C. 40 º С.

    D. 45 º С.

    E. 25 º С.

  1.  All of the following impression materials belong to impression compounds except:
  2.  *Vokoloid
  3.  Masster
  4.  Stens-03
  5.  MST-03
  6.  Dentafol

  1.  Gypsum belong to the following group of impression materials:
  2.  *Impression plaster
  3.  Impression compounds
  4.  Alginates
  5.  Zinc oxide-eugenol
  6.  Zinc oxide-guaiacol

  1.  The setting time of gypsum is not influenced  with:
  2.  *Dye filler
  3.  Water temperature
  4.  Quantity of water
  5.  Speed of kneading

  1.  Gypsum should be stored:
  2.  *Hermetic storage
  3.  Dark room
  4.  Low range of humidity
  5.  Not important

  1.  Which thermoplastic impression material is indicated for impressions of teeth prepared for crowns, inlays?
  2.  *MST-03
  3.  Dentafol
  4.  Stomaplst
  5.  Masster
  6.  Ortocor

  1.  Is it possible to reuse impression compound?
  2.  *Possible if to sterilize used material
  3.  Impossible in any condition
  4.  Possible if to mix used material with a portion of new one
  5.  Possible in any condition

  1.  What substance is accelerator of zinc oxide eugenol?
  2.  *Zinc acetate
  3.  Zinc oxide
  4.  Eugenol
  5.  Kaolin
  6.  Hydrogenated resin

  1.  The patient V., 1965 year of birth, is performed impression taking from the lower jaw with impression compound. Compound was heated till liquid state and added into impression tray with the help of brush. Which material should be added by brush?
  2.  *Dentafol
  3.  Stomaplast
  4.  Stens-03
  5.  Masster
  6.  MST-03

  1.  What is zinc oxide-eugenol indicated for?
  2.  *Functional impression
  3.  Anatomic impression
  4.  Auxiliary impression
  5.  Impression for fixed prosthodontics

  1.  Before pouring casts gypsum impressions should be soaked:
  2.  Into cold water for 5 min
  3.  Into cold water for 10 min
  4.  Into hot water for 5 min
  5.  Into hot water for 10 min
  6.  Nothing mentioned above

13. Gypsum impression pieces should be glued together with:

  1.  *boiled wax
  2.  warm wax
  3.  there is no difference in wax temperature

14. Advantages of impression plaster are the following except:

  1.  *easily detached from teeth
  2.  minimal shrinkage
  3.  not soluble in saliva
  4.  easily detached from tray
  5.  Good surface detail

15. Gypsum impression withdrawal starts from:

  1.  *separating tray from impression
  2.  distal areas
  3.  anterior areas
  4.  simultaneous
  5.  nothing mentioned above

16. In order to get gypsum impression from the mouth doctor should:

  1.  *brake it
  2.  pull it
  3.  there is no difference
  4.  wet it
  5.  do nothing

17. Disadvantage of gypsum is the following:

  1.  *difficult to detach from teeth
  2.  minimal shrinkage
  3.  soluble in water
  4.  toxic
  5.  not accurate surface detail

18. What increases the setting rate of zinc oxide eugenol? (3 answers)

  1.  *Accelerator addition
  2.  *Humidity
  3.  *Increasing of temperature
  4.  Decreasing of temperature
  5.  Eugenol

19. Retarders of gypsum crystallization are: (3 answers)

  1.  *Sugar
  2.  *Starch
  3.  *Glycerin
  4.  Sodium chlorite
  5.  Potassium chlorite

20. What temperature does setting rate of gypsum start to decrease at?

  1.  *50-100 ºC
  2.  30-37ºC
  3.  37-50 ºC
  4.  Above 100 ºC

THEME 7

1. While dipping teeth into alginate impression material doctor should:

  1.  *don’t press
  2.  slightly press on impression tray
  3.  permanently press on impression tray
  4.  make quick pressure on impression tray
  5.  choose different techniques

2. After taking impression using alginate the cast ideally should be poured:

  1.  *Immediately
  2.  In 2 hours
  3.  In a day
  4.  There is no difference
  5.  In a week

3. Disadvantage of alginate is:

  1.  *shrinkage
  2.  not soluble in saliva
  3.  elasticity
  4.  low viscosity
  5.  easily removed from teeth

4. Doctor chose standard impression tray for impression making with c-silicone. What is the nest step?

А. *covering the tray with adhesive

В. teeth preparation

С. mixing of putty paste

D. mixing of wash paste

E. covering teeth with cellophane

5. A lower W/P ratio if alginate increases:

A. *strength, tear resistance and consistency

B. grainy mix and consistency

C. working and setting times and flexibility

D. tear resistance, working and setting times

E. strength, grainy mix and consistency

6. Anesthesia before impression taking with c-silicone is performed for:

  1.  *Anesthetize tissues before using retraction cord
  2.  Anesthetize tissues before taking impression with putty
  3.  Anesthetize teeth before taking impression
  4.  Anesthetize teeth before preparation
  5.  Anesthetize tissues before taking impression with wash

7. How should alginate impression be kept before cast pouring?

  1.  *be covered in a damp gauze/napkin
  2.  Be soaked In water
  3.  In cellophane packet
  4.  be soaked in hypochlorite
  5.  in the air

8. A lower W/P ratio if alginate decreases:

A. *working and setting times and flexibility

B. grainy mix and consistency

C. strength, tear resistance and consistency

D. tear resistance, working and setting times

E. strength, grainy mix and consistency

9. The purpose of sodium phosphate is to:

  1.  *decrease setting time
  2.  increase setting time
  3.  obtain smooth model and die surfaces
  4.  dye
  5.  flavour

  1.  Thixotropy is –
  2.  *a property of material liquefy when subjected to vibratory forces like simple shaking, and then solidify again when left standing
  3.  A property of material to solidify
  4.  A property of material to liquefy
  5.  a property of material liquefy when subjected to vibratory forces like simple shaking
  6.  a property of material liquefy when subjected to heating and then solidify again

  1.  Which silicones reaction of polymerization gives no by-product?
  2.  *Addition
  3.  Dissolution
  4.  Crystallization
  5.  Cross-linking
  6.  Condensation

  1.  Is it important to use gloves of definite material while mixing C-silicones?
  2.  *It is not important
  3.  It is important
  4.  It is important only for several brands of c-silicones

  1.  Working time is –
  2.  *Duration from the start of mixing to the time when a test rod leaves a permanent indentation in the material upon withdrawal.
  3.  Duration from the start of mixing to the time when material is viscous
  4.  Duration characterizing changes of material
  5.  Duration from viscous state to high viscosity
  6.  Duration characterizing physical and chemical changes of material

  1.  Alginate impression materials are NOT used for:
    1.  *Impressions for fixed prosthodontics
    2.  Partial removable dentures
    3.  Preliminary impressions for complete dentures
    4.  Orthodontic impressions
    5.  Diagnostic impressions

  1.  Disadvantage of C-silicones is:
  2.  *Hydrophobic
  3.  Ease of use
  4.  Moderate tear strength
  5.  Accurate
  6.  Non toxic and non irritant

  1.  What is setting contraction of A-silicones over first 24 hours (% by Craig, 1989)?
  2.  *0,14 – 0,17
  3.  0,18 – 0,25
  4.  0,26 – 0,37
  5.  0,38 – 0,60
  6.  0,61 – 0,80

  1.  This statement is NOT advantage of silicones:
  2.  *Easy to remove from tray
  3.  Dimensional stability
  4.  High tear resistance
  5.  Good elastic recovery
  6.  Wide range of viscosity’s

  1.  There are NO such range of A-silicones viscosity:
  2.  *Very low
  3.  Low
  4.  Moderate
  5.  High
  6.  Very high

  1.  What is the influence of latex gloves on additional silicones?
  2.  *Increase setting time
  3.  Change of color
  4.  Decrease setting time
  5.  Change of flavour
  6.  Increase amount of sulphur

  1.  What can be used for alginate and silicone impressions disinfection? (mark 2 answers)
  2.  *Sodium hypochlorite
  3.  *Iodophors
  4.  Dezoxon
  5.  Glutarex
  6.  Glutaraldehyde

THEME 8

Pattern materials. Requirements to them. Waxes. Composition and mechanical properties. Manipulation.

Q1. Dental technician is going to pattern crown of 21 tooth. Gypsum cast of this tooth has defect. Choose the wax what is necessary for wax pattern of 21 tooth.

А. *pattern

В. casting

С. base wax

D. processing

E. sticky

Q2. Choose the wax for pattern of denture base of partial removable denture.

  1.  *Base
  2.  Pattern
  3.  Processing
  4.  Sticky
  5.  Casting

Q3. Wax pattern of tooth crown is recommended to be performed with carnauba wax. What is the group of this wax?

  1.  *Plant waxes
  2.  Mineral waxes
  3.  Natural waxes
  4.  Animal waxes
  5.  Synthetic waxes

Q4. What is the origin of waxes?

  1.  *Animal, synthetic, plant, insect
  2.  Animal, plant, synthetic
  3.  Plant, insect, marine, animal
  4.  Marine, animal, synthetic, plant
  5.  Insect, synthetic, marine, plant

Q5. Full metal swaged crown for 16 is being made. Step of wax pattern. Occlusal surface of 16 is ruined by caries. Technician should restore it. What he can use to check it?

  1.  *Relation with antagonists
  2.  Occlusal surface of 17
  3.  Occlusal surface of 26
  4.  Occlusal surface of 46
  5.  Relation with neighboring teeth

Q6. While wax patterning of 24 wax fell to cervical line. What will happen due to this mistake?

  1.  *There are no marginal fit
  2.  Crown is not possible to put on tooth
  3.  Crown is higher than necessary
  4.  Crown is out of contact with antagonist
  5.  Crown is too short

Q7. Dental waxes are classified according to their applications into:

  1.  *Base, casting, pattern, processing, sticky
  2.   Casting, pattern, processing, adhesive
  3.  Pattern, processing, sticky, base, adhesive
  4.  Base, casting, pattern, adhesive

Q8. Dental waxes include ingredients:

  1.  *Natural waxes, synthetic waxes, natural resins, oils, fats, coloring agents
  2.  Alkali, synthetic waxes, fats, coloring agents, natural resins
  3.  Natural waxes, synthetic waxes, oils, alkali
  4.  Fats, coloring agents, natural resins, synthetic waxes

Q9. Base wax is used for:

  1.  *denture bases, occlusal rims, orthodontic apparatuses, custom trays
  2.  inlays, intermediate part of bridges, occlusal rims
  3.  intermediate part of bridges, orthodontic apparatuses, denture bases
  4.  custom trays, denture bases, intermediate part of bridges
  5.  intermediate part of bridges, orthodontic apparatuses, custom trays

Q10. The differences of casting waxes from base waxes are:

  1.  *high ductility, low temperature shrinkage
  2.  low ductility, low temperature shrinkage
  3.  high ductility, high temperature shrinkage
  4.  low ductility, high temperature shrinkage

Q11. Pattern wax is used for modeling:

  1.  *fixed dentures
  2.  fixed and removable dentures
  3.  removable dentures
  4.  custom tray

Q12. Processing waxes are used for:

  1.  *sprue system, cast removable dentures
  2.  custom trays, sprue system
  3.  cast removable dentures, custom trays
  4.  inlays, intermediate part of bridges

Q13. Which wax properties cause its distortion? (mark 2 answers)

  1.  *Inner stress
  2.  *Thermal expansion coefficient
  3.  Setting expansion
  4.  Hygroscopic expansion
  5.   Surface tension

Q14. Ash level is:

  1.  *Percent of incombustible remainder
  2.  Percent of burnt remainder
  3.  Percent of evaporated wax
  4.  Percent of wax shrinkage

Q15. The use of sticky wax:

  1.  *Connecting of denture parts
  2.  Modeling of fixed dentures
  3.  Modeling of removable dentures
  4.  Modeling of intermediate part of bridges
  5.  Making of occlusal rims

Q16. Wax for the direct technique should be heated uniformly at 50C (122F) for 15 minutes before use. Why it should be done?

  1.  *To decrease wax distortion
  2.  To enhance wax ductility
  3.  To enhance homogenous consistency
  4.  To eliminate surface tension

Q17. The wax pattern should be invested quickly for:

  1.  *To minimize distortion
  2.  To eliminate surface tension
  3.  To decrease hygroscopic expansion
  4.  To minimize brittleness

Q18. What can be used for minimizing a surface tension?

  1.  *Debubblizer
  2.  Compensatory varnish
  3.  Isolation vanish
  4.  Separation varnish

Q19. Which materials are NON modeling (according to Trezubov’s textbook)?

  1.  *Cobalt chromium alloys
  2.  Waxes
  3.  Resins
  4.  Low fusible alloys
  5.  Gypsum

Q20. Which materials are used for denture pattern? (2 answers)

  1.  *Waxes
  2.  *Resin
  3.  Ceramic
  4.  Low fusible alloys
  5.  Gypsum

Theme 9.

Polymers. Groups of polymers. Composition. Stages of polymerization. Mechanical properties. Requirements to polymers. Use of polymers in dental practice.

1. Materials that are used in prosthodontics divided on:                                    

  1.  *metal alloys, polymers, ceramic materials, auxiliary materials;
  2.  polymers, ceramic materials, auxiliary materials;                             
  3.  auxiliary  materials, polymers, metal alloys;                                           
  4.  metal alloys and polymers;                                                                              
  5.  non-metal mixtures, metal alloys, auxiliary materials;             

2. Soft lining will be manufactured in removable denture base. Choose soft polymer from the materials listed below:

  1.  *PMS
  2.  Ftorax
  3.  Redont
  4.  Etacryl
  5.  Karbodent

3. Polymer crown can be manufactured of AKR-7 or Sinma-M. Which groups of polymers are they belong to?

  1.  *Acrylic
  2.  Polyethylene
  3.  Polypropylene
  4.  Epoxy resin
  5.  Composite polymer

4. What polymer from the listed below can be used for denture base manufacture?

  1.  *Ftorax
  2.  Protacryl
  3.  AKR-7, Sinma-M
  4.  Etacryl
  5.  Redont

5. What polymer can be chosen to fabricate acrylic crown for 21 tooth?

  1.  *AKR-7, Sinma-M
  2.  Redont
  3.  Ftorax
  4.  Etacryl
  5.  Protacryl

6. What are the most types of polymerization reactions? (Mark 2 answers)

  1.  *Polyaddition
  2.  *Polycondensation
  3.  Polymerization
  4.  Polysorbtion
  5.  Polyaglomeration

7. Which statement from the list below is more complete and correct about dental polymer composition?

  1.  *Fillers, plasticizers, stabilizers, pigments, cross-linking agents, antimicrobial agents, initiators, activators, inhibitors.
  2.  Fillers, plasticizers, stabilizers, pigments, cross-linking agents, initiators, activators, inhibitors.
  3.  Fillers, plasticizers, stabilizers, pigments, antimicrobial agents, initiators, activators
  4.  Fillers, plasticizers, stabilizers, pigments, initiators, antimicrobial agents, activators.
  5.  Plasticizers, stabilizers, pigments, cross-linking agents, antimicrobial agents initiators, activators, inhibitors.

8. What are the basic spatial structures of polymers?

1 Linear 2 Crossed 3 Branched 4 Cross-linked 5 Spiral

  1.  *1,3,4
  2.  1,2
  3.  3,4
  4.  1,2,3
  5.  2,4,5

9. Which polymer properties mainly determine functional features of denture and its longlife?

  1.  *Elasticity and impact resistance
  2.  Water absorbing and elasticity modulus
  3.  Specific crash viscosity and crash durability
  4.  Elasticity and water absorbing
  5.  Heat stability and impact resistance

10. What are the methods of polymer molding?

  1.  *Compressive molding
  2.  *Injection molding
  3.  Light-cure molding
  4.  A,B
  5.  A,C

11. A dental technician put flask with acrylic dough into boiling water. Which type of porosity does appear?

  1.  *Gas
  2.  Granular
  3.  Pressing

12. Which stage of acrylic resin is not correct to use?

1 Stringy 2 Wet sand 3 Dough 4 Rubber

  1.  *2,4
  2.  1,2
  3.  2,3
  4.  3,4
  5.  1,4

13. What are the types of elastic polymers?

  1.  *Silicone, acryl, polyvinyl, polyphosphazene
  2.  Acryl, silicone, polyvinyl, polycarbonate
  3.  Silicone, polyvinyl, polyphosphazene
  4.  Polyphosphazene, acryl, polyvinyl
  5.  Silicone, polycarborane, polyvinyl, polyphosphazene

14. What feature is NOT disadvantage of elastic base polymers?

  1.  *Decreasing of adaptation period
  2.  Porosity, poor polishing
  3.  Loss of elasticity
  4.  Poor marginal seal
  5.  Not easy to work

15. Packing is:

  1.  *Filling mold with polymer-monomer composition
  2.  Making gypsum mold
  3.  Acrylisation
  4.  Preparation of packing mixture
  5.  Pressing mold with acrylic dough

16. What is the main ingredient of most base materials?

  1.  *Polymethylmethacrylate
  2.  Caoutchouc
  3.  Dimethylparatholuidin
  4.  Polycarbonate
  5.  Nylon

17. The use of polymers:

  1.  *Denture base, soft liners, impression materials, artificial teeth, substitution of dental hard tissues, individual trays, interim dentures
  2.  Denture base, soft liners, impression materials, artificial teeth, substitution of dental hard tissues
  3.  Denture base, soft liners, impression materials, artificial teeth, substitution of dental hard tissues, individual trays
  4.  Denture base, soft liners, impression materials,  individual trays, interim dentures
  5.  Denture base, soft liners, impression materials, artificial teeth, substitution of dental hard tissues, interim dentures

18. What is a liquid phase of base material composed of?

  1.  *Monomer, cross-linking agent
  2.  Copolymer, initiator
  3.  Activator, cross-linking agent
  4.  Pigment, activator
  5.  Plasticizer, monomer

19. What are the main criteria factors of completely fulfilled polymerization reaction of base polymer?

  1.  *Temperature, pressure, time
  2.  Time, pressure, humidity
  3.  Temperature, pressure, humidity
  4.  Temperature, humidity, light
  5.  Humidity, light, time

20. What is the purpose of cross-linking agents?

  1.  *Strengthen of polymer material
  2.  Increasing of catalyst activeness
  3.  Decreasing of shrinkage
  4.  Increasing of elasticity modulus
  5.  Increasing of resilience




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