7. There are six instruments in the main tray. Which instrument is used for oral and teeth inspection?

   1. Spatula

   2. mirror

   3. probe

   4. condenser

   5. smother

7. There are six instruments in the main tray. Which instrument is used determination of tooth mobility and for cotton rolls insertion?

   1. *Pincers

   2. Spatula

   3. Probe

   4. Condenser

   5. Smoother

7. Dental unit need to be grounded. How it can be done?

   1. *through ground cable

   2. connect ground cable to radiator

   3. connect ground cable to another dental unit

   4. connect ground cable to dental chair

7. After teeth preparation burs are disinfected in open dish under dry hot air during an hour at temperature:

   1. *180°C

   2. 160°C

   3. 100°C

   4. 120°C

   5. 140°C

7. Separating disks are disinfected in closed glass dish during 30 minutes. Which solution is used for it?

   1. *1,5% sol. lyzoformine 3000

   2. 0,5% chloramine B

   3. 5% sol.lyzoformine 3000

   4. 3% sol. hydrogen peroxide

   5. Sol.furacilin 1: 5000

7. Alginate impressions are disinfected during 3 minutes immersing into such solution:

   1. *0,5% sodium hypochlorite

   2. sol. on a base of paraformaldehyde

   3. 0,2% sol. ”Dezoxon-1”

   4. 2% sol.”Dichlorine-1”

   5. 3% sol. hydrogen peroxide

7. Nurse is going to prepare gypsum for impressions making. Which instrument is used for it?

   1. *metal spatula

   2. smoother

   3. plastic spatula

   4. condenser

7. Nurse is going to prepare zinc phosphate cement for metal crowns cementation. Which surface is used for mixing of this material?

   1. *glass

   2. metal

   3. paper

   4. plastic

   5. 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;