Pros tutorial partial dentures

Question 1

When should you start designing the denture?

Answer 1

Case assessment

Question 2

What 4 things would you do in the case assessment for partial dentures?

Answer 2

• Current dentures (if any)
• Oral health and risk factors
• Assessment of occlusion
• Index teeth (if any)

Question 3

What 7 questions to ask when taking a denture history ?

Answer 3

• length of time they had dentures
• When did they lose their teeth?
• How many dentures they had?
• What are their complaints about their current denture?
• Success and failure of previous prosthesis
• Are they dentures worn made at the same time?
  *Are you wearing the most recent set?

Question 4

Why do we survey casts for partial dentures?

Answer 4

• Determine path of insertion
• Determine position and depth of undercuts
• Determine the presence of guideplanes

Question 5

How can the position of undercuts determine the denture design?

Answer 5

• Determine where to use clasps
• Determines areas the will prevent the denture from seating

Question 6

What is the difference between the path of displacement and the path of insertion?

Answer 6

• the path of displacement is the direction in which the denture tends to be dislodged which is assumed to be perpendicular to the occlusal plane
• the path of insertion is the path in which the denture in inserted and removed

Question 7

Describe the affect of the path of insertion and and path of displacement on denture retention?

Answer 7

• Retention is better when the path of insertion and displacement are different

Question 8

What are 6 components of a surveyor?

Answer 8

• Base
• Surveying table - case is placed
• Surveying arm
• Vertical arm
• Horizontal arm
• Surveying tools

Question 9

What are 4 surveying tools ?

Answer 9

• Analysing rod
• Graphite marker
• Undercut gauges
• Wax knife

Question 10

4 advantages of CoCr over acrylic?

Answer 10

• Stronger
• Thinner
• Better tolerated
• Less damaging to periodontium

Question 11

2 Disadvantages of Cocr in relation to acrylic?

Answer 11

• Difficult to add to
• More expensive

Question 12

2 advantages of acrylic in relation to CoCr?

Answer 12

• Cheaper
• Easier to add to

Question 13

3 disadvantages of acrylic in relation to CoCr?

Answer 13

• Less well tolerated
• More damaging to the periodontium
• Weaker
• Bulky

Question 14

Why do we use a buccal bar?

Answer 14

Lingually tilted teeth

Question 15

A major connector for Kennedy class 2 in the maxilla?

Answer 15

Posterior palatal bar

Question 16

Why would you choose a lingual plate over a lingual bar major connector?

Answer 16

• Becuase there isn’t enough space for a lingual bar as we need at least 8mm clearance for a lingual bar

Question 17

Why we must use the surveyor and design the denture before taking master impressions?

Answer 17

• Because we might need to adjust the teeth for the design such as
  cutting rest seats and guideplanes
  adding undercuts with composite

Question 18

What problems are with teeth circled relating to designing a partial denture?

Answer 18

• Teeth are lingually tilted meaning undercuts are lingual not buccal
• meaning that clasp arms will engage lingually

Question 19

List dow different materials need different undercuts?

Answer 19

• CoCr - 0.25 mm
• Gold - 0.5 mm
• SS - 0.75 mm

Question 20

5 characteristics of clasps?

Answer 20

• Engage undercuts
• Flexibility - the longer the more flexible
• Reciprocation
• Aesthetic

Question 21

Answer 21

-

Question 22

What is indirect retention?

Answer 22

• Resistance of the denture to rotational displacement

Question 23

What is the best type of support and retention?

Answer 23

Quadrilateral opposed rests and clasps

Question 24

What is bracing ?

Answer 24

Resistance to horizontal movement

Question 25

How can achieve bracing?

Answer 25

By using soft tissues

Question 26

Why is a high arched palate is favourable to a shallow palate?

Answer 26

* High arched palate provides more resistance to horizontal movement

Question 27

What are the 8 key steps of designing a partial denture?

Answer 27

* Case assessment * Classification of support for each saddle * Choose denture base material, Connect saddles together *Choose the path of insertion and delineate undercuts * Retention * Indirect retention * Support * Bracing