DMS past papers

Question 1

Q1 Dental Amalgam is a widely used restorative material. Several different amalgam products are available

1. with regards to ‘Non-y2 amalgam’ give two advantages in terms of performance of a non Y2 amalgam

Question 2

Q1 Dental Amalgam is a widely used restorative material. Several different amalgam products are available

1. with regards to ‘Non-y2 amalgam’ - how does the manufacturer reduce y2 from the structure of amalgam

Question 3

Q1 Dental Amalgam is a widely used restorative material. Several different amalgam products are available

2. with regards to ‘Zinc free amalgam’ Originally, why was it necessary for manufacturers to add zinc to amalgam alloy?

Question 4

Q1 Dental Amalgam is a widely used restorative material. Several different amalgam products are available

2. with regards to zinc free amalgam - what effect could occur in a freshly placed amalgam restoration as a result of the presence of zinc in the amalgam alloy

Question 5

Q1 Dental Amalgam is a widely used restorative material. Several different amalgam products are available

2. with regards to zinc free amalgam - Explain the mechanism of this effect

Question 6

Q1 Dental Amalgam is a widely used restorative material. Several different amalgam products are available

2. with regards to zinc free amalgam - what is the main symptom that the patient could experience should this occur

Question 7

Q2 -Your VT trainer uses a conventional Glass Ionomer as his lining material. It is dispensed as a powder and liquid and hand mixed by his nurse. You want to use the Resin Modified Glass Ionomer Cement (RMGIC) lining material you have used previously in the dental hospital (Vitrebond). You with to persuade him to change to your preferred material.

1. What are the advantages of the material you want to use? (3 marks)

Question 8

Your VT trainer uses a conventional Glass Ionomer as his lining material. It is dispensed as a powder and liquid and hand mixed by his nurse. You want to use the Resin Modified Glass Ionomer Cement (RMGIC) lining material you have used previously in the dental hospital (Vitrebond). You with to persuade him to change to your preferred material.

2. Your trainer is unconvinced. He uses his present material as a universal GI for lining, filling and luting because it is cheaper. Why is he wrong to use a glass ionomer filling material as a luting agent? (2 marks)

Question 9

Your VT trainer uses a conventional Glass Ionomer as his lining material. It is dispensed as a powder and liquid and hand mixed by his nurse. You want to use the Resin Modified Glass Ionomer Cement (RMGIC) lining material you have used previously in the dental hospital (Vitrebond). You with to persuade him to change to your preferred material.

3. Which luting agent would you use to cement the following restorations? (do not use tradenames)

a) a metal post and core (1mark)
b) a porcelain veneer (2 marks)
c) a fibre post (2 marks)

Question 10

Q3 Mrs Dodds is a 45 year old women who had a large MOD composite on 46 four months ago. She presents complaining that a bit of filling has come away and she is not happy. You suspect that this may have something to do with bonding and placement of composite. She is adamant she wants a crown and heard that porcelain is the best and demands this.

Describe the method of how composite bonds to dentine

Question 11

Q3 Mrs Dodds is a 45 year old women who had a large MOD composite on 46 four months ago. She presents complaining that a bit of filling has come away and she is not happy. You suspect that this may have something to do with bonding and placement of composite. She is adamant she wants a crown and heard that porcelain is the best and demands this.

Describe how porcelain is treated to improve its retention

Question 12

Q3 Mrs Dodds is a 45 year old women who had a large MOD composite on 46 four months ago. She presents complaining that a bit of filling has come away and she is not happy. You suspect that this may have something to do with bonding and placement of composite. She is adamant she wants a crown and heard that porcelain is the best and demands this.

Name 2 luting cements other than resin based that could be used to bond this crown

Question 13

Q3 Mrs Dodds is a 45 year old women who had a large MOD composite on 46 four months ago. She presents complaining that a bit of filling has come away and she is not happy. You suspect that this may have something to do with bonding and placement of composite. She is adamant she wants a crown and heard that porcelain is the best and demands this.

Describe how a resin based luting cement bonds to porcelain

Question 14

Q3 Mrs Dodds is a 45 year old women who had a large MOD composite on 46 four months ago. She presents complaining that a bit of filling has come away and she is not happy. You suspect that this may have something to do with bonding and placement of composite. She is adamant she wants a crown and heard that porcelain is the best and demands this.

name 1 advantage to placing a crown as a posterior restoration

Question 15

Q4 Composite - what are the components of composite

Answer 15

• Glass filler particles
• resin
• camphorquinone
• low weight dimethacrylates
• silane coupling agent

Question 16

Q4 name 4 different types of composite

Question 17

Q4 what are the clinical disadvantages and how are they minimised

Question 18

Q4 give 3 advantages of composite over amalgam

Question 19

Q5 Amalgam - what is the setting reaction for amalgam

Question 20

Q5 - what changes have been made to modern amalgam to improve it?

Question 21

Q5 - what are the advantages of amalgam?

Question 22

Q5 - what are the disadvantages of amalgam?

Question 23

Q6 Porcelain - how is the surface of porcelain veneers treated in the lab to improve adhesion?

Question 24

Q6 if using composite resin cement, what material ensures a good bond to the porcelain

Answer 24

• silane coupling agent ?

Question 25

Q6 chemically, how does this work?

Question 26

Q6 where else is this material used in dentistry?

Question 27

Q6 when is a dual cured cement indicated?

Question 28

Q7 what are the ideal properties of denture bases?

Question 29

Q7 what are the constituents of PMMA?

Question 30

Q7 Give 4 possible faults during production and explain why they occur

Question 31

Q8 Give 4 advantages of a CoCr denture base

Question 32

Q8 Give 2 disadvantages

Question 33

Q8 what undercuts are required for clasps of SS, gold and CoCr?

Question 34

Q9 What are the ideal properties of an impression material?

Question 35

Q9 name 4 non elastic impression materials

Question 36

Q9 name 4 elastomer impression materials

Question 37

Q9 name 2 hydrocolloid materials

Question 38

Q10 What are the ideal properties of an impression material?

Question 39

Q10 what are the constituents of alginate

Question 40

Q10 what is the setting reaction of alginate

Question 41

Give 2 advantages and 2 disadvantages of alginate use

Question 42

Q10 give two uses of alginate

Question 43

Q10 give 3 advantages of elastomeric impression materials over alginate

Question 44

Q11 what is the composition of GI

Question 45

Q11 Briefly describe the setting reaction

Question 46

Q11 give 4 uses for GIC?

Question 47

Q11 give 4 properties of GIC

Question 48

Q11 Give 4 disadvantages of GIC