The Single Denture

Question 1

What is the most common situation for a single denture?

Answer 1

• maxillary arch is edentulous
• mandibular arch has natural/restored teeth

Question 2

What are the possible issues with natural teeth opposing a complete denture?

Answer 2

• natural teeth generate greater chewing force
• natural teeth do not move in function as the denture does
• cannot control placement of opposing teeth
• drifting/tilting puts natural teeth far from optimal position

Question 3

What is centripetal resorption?

Answer 3

Routine resorption pattern following extraction of teeth results in a smaller maxilla when compared to dentate arch.

Question 4

What direction does the maxilla resorb?

Answer 4

up and inward

Question 5

When should a horizontal arch discrepancy be placed?

Answer 5

when the maxillary arch narrows and becomes shorter in the A-P direction

• may need to use a crossbite

Question 6

Why would you use a crossbite on a single denture patient?

Answer 6

to direct occlusal forces to the bearing area

Question 7

What is the syndrome is caused when maxillary CD opposed by mandibular anterior natural teeth?

Answer 7

The combination syndrome

Question 8

What are the symptoms of the combination syndrome?

Answer 8

• maxillary anterior tissue is mobile
• inflammatory palatal hyperplasia (IPH)
• maxillary tuberosities enlarged
• mandibular posterior bone resorption
• mandibular anterior teeth supraerupted

Question 9

Curve of spee

Question 10

Curve of wilson

Question 11

What is the curve of monson?

Answer 11

• combination of the curve of spee and curve of wilson
• coronal and sagittal planes
• concave for mandibular
• convex for maxillary

Question 12

The curve of monson in ________ occlusion forms a segment of the sphere of 4 inch radius with the center of the sphere at the ______

Answer 12

centric occlusion
glabella

Question 13

How should you level the occlusal plane on the natural teeth with a single denture?

Answer 13

• restore
• reduce
• remove

Question 14

What type of occlusion do you what with a single denture?

Answer 14

interdigitation (cusp in fossa)

Question 15

Biting force of natural dentition is approximately ___ times that of the denture wearers

Answer 15

5 times

Question 16

What can you do when you have natural maxillary and edentulous mandibular?

Answer 16

 Discuss the likely poor outcome
 Resilient liner in mandibular denture
 Osseointegrated implants in mandible

Question 17

Overdenture defintion

Answer 17

denture that goes over a tooth or an implant

Question 18

Mandibular anterior resorbs approx ______ times as fast as maxillary anterior

Answer 18

4 times

Question 19

What are the advantages of overdentures?

Answer 19

• denture support is increased
• soft tissue trauma decreases
• stability of denture is increased
• maintenance of periodontal proprioception improves chewing efficiency
• psychological benefit to patient
• residual ridge integrity
• viable and simple alternate technique to CD
• application is unlimited

Question 20

When should you make an overdenture?

Answer 20

 When a conventional denture would have a poor prognosis
 When opposing an arch of natural teeth
 When “Combination Syndrome” is a factor

Question 21

What are the disadvantages of an overdenture?

Answer 21

slide 32 and 33
- likely time dependent transition to complete denture
- age related inability to follow hygiene
- refractory periodontal disease
- caries
- frequent recall appointment expenses
- available interarch space
- weakness in acrylic denture base
- cast copying (increased lab procedures)
- more expensive
- denture is bulkier in some areas

Question 22

How do you select abutment teeth?

Answer 22

• periodontal and mobility status
• abutment location (canines/premolars)
• endodontics and prosthodontic statis (anteriors are easy for endo)

Question 23

What endo teeth are good as abutment teeth?

Answer 23

Anteriors (canines forward)
- premolars are ok and molars are bad
- canine is the best!

Question 24

What treatment is recommended for most overdenture abutment teeth?

Answer 24

root canal treatment (ENDO)

Question 25

The crown/root ratio should be…

Answer 25

1/2

Question 26

Why are canines most frequently selected as abutments?

Answer 26

 Canines have large roots
 Amenable to RCT
 Strategic location at corner of arches

Question 27

Why should you skip every other tooth and/or put spacing between abutments?

Answer 27

prevent caries and perio issues

Question 28

What are some sequelae/problems with overdenture abutments?

Answer 28

abutment failure (caries or perio)
denture fracture

Question 29

Why type of restoration should you use for abutment teeth?

Answer 29

amaglgam
cast gold copings