Partially-Edentulous Patients

Question 1

Advantages of #45i single tooth implant?

Answer 1

1. Osseointegration
2. Alveolar bone continues to receive stimuli
3. High survival rate
4. Conservation of tooth structure
5. No stress placed on adjacent natural teeth
6. Patient comfort

Question 2

Disdvantages of #45i single tooth implant?

Answer 2

1. Aesthetic success may be difficult to achieve
2. Adverse outcomes difficult to reverse
3. Depends on bone support
4. Long duration of treatment
5. Risk of infections
6. Expensive
7. Potential bone loss

Question 3

Advantages of #46-P-#44 tooth-supported FDP?

Answer 3

1. No need for surgery
2. Shorter duration of treatment
3. Patient comfort
4. Less troublesome compared to removable options
5. Cuspal protection of abutment teeth

Question 4

Disdvantages of #46-P-#44 tooth-supported FDP?

Answer 4

1. Adjacent natural teeth not spared
2. Difficult oral hygiene practices
3. Possible marginal leakage
4. Downward restorative spiral
5. Not for marked bone resorption -> Denture better
6. Stress to abutment teeth
7. Risk of devitalisation

Question 5

Advantages of #46-P tooth-supported cantilever FDP?

Answer 5

1. Ease of oral hygiene practices
2. Increases stability of dentition

Question 6

Disdvantages of #46-P tooth-supported cantilever FDP?

Answer 6

Any load on extension pontic creates a lever action

1. Terminal abutment carries largest portion of load -> Detrimental to abutment
2. Risk of fracture of framework and teeth

Question 7

Advantages of #45i-P implant-supported cantilever FDP?

Answer 7

Same as single tooth implants

1. Used for inadequate space for placement of 2 implants
2. Ease of oral hygiene practices

Question 8

Disdvantages of #45i-P implant-supported cantilever FDP?

Answer 8

Cantilever create unfavourable force systems

Longer cantilever arm = Greater risk of fracture

Question 9

Advantages of #45i-P-43 combined implant-and-tooth-supported FDP?

Answer 9

Justified by patient-centred issues

Question 10

Disdvantages of #45i-P-43 combined implant-and-tooth-supported FDP?

Answer 10

1. Biomechanical challenge (Implant fixed to the bone while tooth PDL allows mobility)
2. Effects of differential mobility
   a. Fracture of prosthesis
   b. Implant overload
   c. De-cementation of fixed prosthesis -> Secondary caries

Question 11

Advantages of #P-41 tooth-supported resin-bonded FDP (with #45i-P-43i implant-supported) ?

Answer 11

1. Minimal removal of tooth structure
2. Easy and economical
3. Aesthetic
4. Serve as transitional FP treatment in young patients
5. Easily replaced if dislodged

Question 12

Disdvantages of #P-41 tooth-supported resin-bonded FDP (with #45i-P-43i implant-supported FDP)?

Answer 12

1. Less retention than conventional bridge
2. Not suitable for patients with heavy occlusion
3. No hard foods
4. Enamel must be present on abutment teeth