Theme 3. Identifying and recording of central occlusion in case of I, II, III class of dental arches defects. Teeth arrangement. Fitting test.

Q1. A maximum intercuspation occlusion that demonstrates no pathology is the clinical occlusion to which most removable partial dentures are constructed.

*T or F

Q2. Which of the following clinical requirements is not required in order to produce an acceptable functionally generated record of mandibular movements:

a. *fully adjustable articulator

b. acceptable occlusal guidance

c. stable record base

d. completed opposing restored or natural arch

Q3. Methods for evaluating the vertical dimension of occlusion are the:

1. proprioception and tactile sense of the patient

2. parallelism of the ridges

3. closest speaking space

4. vertical dimension of rest less 3mm

5. temporary diagnostic stent overlaying the natural dentition

Choose one

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

b. 2, 3, 4

c. 1, 2, 3, 4

d. 3, 4, 5

Q4. Occlusal rims with wax bases are necessary for:

A. *Identifying central occlusion

B. Teeth arrangement

C. Mounting models into occluder

D. Making sagittal curve

E. Making occlusal plane

Q5. There is no such type of occlusion:

A. *Posterior

B. Anterior

C. Lateral

D. Central

Q6. Patient complains of partial absence of teeth. Teeth formula:

0000300 / 1200000

0000021 / 1200000

Teeth are intact, stable. Mucosa is healthy. What criterion is used for choice of central occlusion record technique?

A. *Type of dental arches defects

B. Shape of alveolar ridge

C. Height of teeth

D. Shape of remaining teeth

E. State of mucosa

Q7. Who was the author of groups of dental arch defects classification?

A. *Betelman

B. Oxman

C. Gavrilov

D. Kurlandskyi

E. Grosovskyi

Q8. While making removable partial denture a doctor must identify and record central occlusion. Which technique of c.o. recording is the most effective?

A. *Finger method

B. Kantorovich method

C. Forced method

D. Unguided method

Q9. Removable partial dentures are fabricated for lower and upper jaws of a patient. Teeth formula:

0054021 | 0004000

0000300 | 0000060

Which steps will be performed while identifying central occlusion?

A. *Modeling of prosthetic plane, identifying vertical dimension, identifying and recording c.o. , marking out

B. Identification and record c.o.

C. Identifying vertical dimension,identifying and recording c.o.

D. Identifying and recording c.o. , marking out

Q10. What type of polymer is used for both teeth and base manufacture?

A. *Acrylates

B. Fluoroplastic

C. Polyamide

D. Phenol formaldehyde

E. Phenoplastic

Q11. The method of denture base manufacture is called:

A. *Molding

B. Casting under pressure

C. Without pressure

D. Combination of methods

E. Casting under high temperature

Q12. RPD is fabricating for a patient’s mandible and maxilla. At fitting test it was revealed that left lateral teeth have occlusal contacts while right lateral teeth don’t contact. What can be done at doctor’s to correct this mistake?

A. *Put soft base plate between lateral right teeth

B. Remove lateral teeth from the upper denture

C. Remove lateral lower teeth

D. Put soft base plate between frontal teeth

E. Remove lateral teeth from lower and upper denture

Q13. RPD is fabricating for a patient’s mandible and maxilla. At a fitting test it was revealed that there are occlusal contacts between artificial teeth and no contacts between natural teeth. What is a solution for this case?

A. *Remove artificial teeth, put occlusal rims and record c.o.

B. Take impressions of teeth with a help of wax plate

C. Acryllization can eliminate this mistake

D. Grind artificial teeth

E. Dental technologist can change the situation in an occluder

Q14. RPD is fabricating for a patient’s mandible and maxilla. At fitting test it was revealed that left lateral teeth have occlusal contacts while right lateral teeth don’t contact. What mistake was made at clinical step?

A. *Occlusal rims didn’t contact simultaneously while recording C.O.

B. Inaccurate impressions were given to laboratory

C. Anterior occlusion was recorded

D. Deformation of wax base while recording c.o.

E. Increasing of bite on the left lateral side

Q15. RPD is fabricating for a patient’s mandible and maxilla. Wax denture with arranged teeth is being fitted now. What mistakes made by doctor can be corrected now?

A. * Improper teeth arrangement

B. Base deformation, poor fixation

C. Inaccurate models, wrong design of clasps, improper denture borders

D. Wrong mounting of models into occluder, wrong vertical dimension

E. Mistakes in occlusion determination, teeth shape and color

Q16. RPD is fabricating for a patient’s mandible and maxilla. At a fitting test it was revealed that there are occlusal contacts between artificial teeth and no contacts between natural teeth. What was the cause of this mistake?

A. *Vertical dimension is increased while central occlusion identifying

B. Improper mounting in an occluder

C. Anterior occlusion is identified

D. Improper teeth arrangement

E. Size of artificial teeth is improper

Q17. RPD is fabricating for a patient’s mandible and maxilla. Teeth formula:

0000001 | 0000500

0050000 | 0000000

At a fitting test using phonetic test it was revealed that there is less than 5 mm gap between teeth. Teeth clench while speaking. What is the cause of this?

A. *Increased vertical dimension

B. Anterior occlusion was determined

C. Improper size of artificial teeth

D. Decreased vertical dimension

E. Improper mounting in an occluder

Q18. RPD is fabricating for a patient’s mandible and maxilla. Teeth formula:

0000020 | 0030000

0600001 | 0000000

At a fitting test doctor is checking lateral artificial teeth contacts. What type of teeth closure must be visualized in sagittal plane?

A. *Medial buccal cusp of 16, 26 sits in transversal fissure of 46, 36

B. Upper cusps overlap lower cusps

C. Medial buccal cusp of 16, 26 sits in central fissure of 46, 36

D. 16 contacts with 45 and 46

E. Cusp to fissure contact in lateral side

Q19. RPD is fabricating for a patient’s mandible and maxilla. Teeth formula:

0000000 | 0034000

0050000 | 0000000

At a fitting test in order to check prothethic plane doctor asks patient to up his tongue, close his teeth and swallow saliva. What muscle while tongue motion draws mandible in the same direction?

A. *Geniohyoid

B. Mylohyoid

C. Masseter

D. Internal pterygoid

E. External pterygoid

Q20. RPD is fabricating for a patient’s mandible and maxilla. At a fitting test it was revealed that lateral teeth contact with antagonists, but frontal don’t contact. What clinical mistake causes this situation?

A. *Anterior occlusion was recorded

B. Increased vertical dimension

C. Denture base deformation was performed

D. Improper mounting into occluder

E. Improper size of artificial teeth