Partial dentures

Question 1

3 advantages of partial dentures?

Answer 1

• improve aesthetics
• improve function - speech and mastication
• prevention of toothwear and drifting

Question 2

5 disadvantages of partial dentures?

Answer 2

• increase in plaque accumulation
• periodontal disease risk
• increased caries rate
• damage to underlying soft tissue
• damage to remaining teeth
• gingival stripping

Question 3

4 things to include in assessment for designing a partial denture?

Answer 3

• Current denture assessment
• Oral health and risk factors
• Assessment of occlusion
• Assessment of index teeth

Question 4

What is kennedy class 1

Answer 4

bilateral free end saddle

Question 5

What is kennedy class 2?

Answer 5

Unilateral free end saddle

Question 6

What is kennedy class 3

Answer 6

Unilateral bounded saddle

Question 7

What is kennedy class 4?

Answer 7

Anterior bounded saddle that crosses the midline

Question 8

KENNEDY CLASS?

Answer 8

CLASS II MOD 1

Question 9

KENNEDY CLASS?

Answer 9

CLASS II MOD 2

Question 10

3 reasons why to Survey casts?

Answer 10

• determine the path of insertion
• determine the position and depth of undercuts
• determine the presence of guide planes

Question 11

What is the path of displacement?

Answer 11

the direction in which the prosthesis tends to be dislodges during function

Question 12

If the path of insertion and the path of displacement are the same this will increase retention, True or False?

Answer 12

False , if they are different the retention is better

Question 13

3 Advantages of CoCr partial denture over acrylic?

Answer 13

• Stronger
• less bulky
• Better tolerated

Question 14

2 Disadvantages of Cocr compared to acrylic?

Answer 14

• more expensive
• difficult to add to

Question 15

2 advantages of acrylic over CoCr partial denture?

Answer 15

• Cheaper
• easier to add to

Question 16

3 disadvantages of acrylic compared to CoCr?

Answer 16

• Weaker
• Thicker (bulky)
• less well tolerated

Question 17

Which connector?

Answer 17

Buccal bar due to lingually tilted teeth

Question 18

which connector?

Answer 18

Lingual bar provides clearance for cleaning and more comfortable to the patient

Question 19

Which connector?

Answer 19

Lingual plate

Question 20

Which connector ?

Answer 20

posterior palatal bar

Question 21

Which connector?

Answer 21

Mid palatal bar

Question 22

Which connector?

Answer 22

Horseshoe

Question 23

What modifications to teeth to do if there are insufficient undercuts?

Answer 23

• Guide planes
• Create undercuts using composite

Question 24

What depth of undercut for CoCr clasp?

Answer 24

0.25 mm

Question 25

What depth of undercut for Gold Clasp?

Answer 25

0.5 mm

Question 26

What depth of undercut for SS clasp?

Answer 26

0.75mm

Question 27

What are clasps used for in Partial denture?

Answer 27

Retention - resistance to movement away from the teeth

Question 28

When would indirect retention be indicated?

Answer 28

When we do not have quadrilateral retainers (clasps)

Question 29

What is indirect retention

Answer 29

Resistant to rotational displacement of the denture

Question 30

What is support?

Answer 30

Resistance of movement towards the teeth and tissues by rests

Question 31

What is the best type of support?

Answer 31

Quadrilateral opposed rests

Question 32

What is bracing?

Answer 32

* Resistance to horizontal movement of the denture

Question 33

How can bracing be achieved?

Answer 33

By using soft tissues

Question 34

What is the benefit of having a high arched palate?

Answer 34

Better bracing aka resistance to horizontal movement of the denture

Question 35

What is the RPI system?

Answer 35

stress relieving system on last abutment tooth * mesial occlusal rest * distal guiding plate * I-shaped retentive clasp Used for free end saddles

Question 36

How does the RPI work?

Answer 36

When the saddle is loaded the denture rotate at an area close to the mesial rest this leads to the plate and I-bar to move towards the gingivae which reduce the stress on the last abutment tooth

Question 37

In what cases would you use RPI?

Answer 37

Kennedy class 1 and Kennedy class 2

Question 38

Examples of gingivally aproaching clasp?

Answer 38

T or I bar clasp

Question 39

Most 3 common dental issues of partial dentured?

Answer 39

* Denture stomatitis * Subgingival calculus * Caries

Question 40

You deliver a partial denture to a patient , What 5 advice would you give a patient?

Answer 40

* Remove dentures at night * Brush dentures with soap and water using a soft brush * You can immerse in chemical cleaner ( follow manufacturer instructions) * Store overnight in cold water * Brush your teeth with the dentures out

Question 41

What are 4 types of denture cleaners?

Answer 41

* Alkaline peroxides * Alkaline hypochlorites * Enzymes * Abrasive cleaners

Question 42

What are 2 disadvantages of Enzymes denture cleaning solutions?

Answer 42

* Expensive * Bleaches acrylic

Question 43

When would you advise on using an abrasive denture cleaning solution?

Answer 43

In smokers

Question 44

What advice would you give a patient who wears an CoCr partial denture when using alkaline hypochlorite cleaner?

Answer 44

Only soak for 10 minutes

Question 45

What is the disadvantage of alkaline peroxides denture cleaners?

Answer 45

Hardens soft lining