Failure of Restorations Flashcards Preview

BDS 2: Adult Restorative > Failure of Restorations > Flashcards

Flashcards in Failure of Restorations Deck (20)
Loading flashcards...

What type of amalgams tend to have the best longevity?

High Copper alloys tend to last longer


In composite with dentine bonding when does failure in cervical cavities typically begin?

10-12 months


How is the longevity of composite with dentine bonding normally improved?

Improved survival with acidic primer


When is a restoration considered failed? (5)

- Secondary disease occurs
- Loss of function of tooth
- “Inevitable” progression to caries
- Microleakage causing sensitivity or pain
- Appearance unacceptable to patient


What could be a potential symptom of secondary disease in a failed restoration? (2)

- Discolouration
- Symptoms of pulpits


How could you detect secondary disease signs at restoration margins? (3)

- Visually
- Radiography
- Tactile (scrape around tooth)


How could you detect secondary disease signs in deep tissue? (2)

- Visually
- Radiography


What are some signs of loss of function of a tooth after a failed restoration? (2)

- Restoration can be loose or lost
- Fractured tooth/cusp causing loss of occluding surface


What are some signs of inevitable progress of caries in a failed restoration? (2)

(Permitting microleakage)

- Fractured restoration permitting microleakage
- Loss of marginal integrity permitting microleakage


List some ways patients may be unhappy with the appearance of a restoration (5)

- Marginal staining
- Discolouration of anterior material
- Contrast with “normal” darkening of tooth
- Gingival recession (darker roots)
- Desire for white fillings


Why do restorations fail? (4)

- Patient factors
- Operator factors (iatrogenic)
- Materials factors
- Chance e.g. trauma


Name some patient factors leading to a failed restoration (5)

- Diet
- Plaque
- Saliva
- Poor oral hygiene
- Para-functional habits


How can we minimise the patient factors in a failed restoration?

When you are giving diet and hygiene advice, customise your advice to your patient lifestyle


What are some examples of errors in planning leading to a failed restoration? (5)

(Operator factors)

- Failure to promote prevention
- Failure to check occlusion before management of tooth
- Failure to take account of whole patient
- Inappropriate restoration for tooth or situation
- Inappropriate restorative material


What are some examples of errors in execution leading to a failed restoration? (8)

(Operator factors)

- Damage to pulp-dentine complex
- Leaving infected carious tissue
- Unsatisfactory cavity design for restorative material
- Failure to cover vital dentine surfaces causing hypersensitive dentine
- Failure to reduce height of tall thin cusps in occlusion
- Failure to use matrix properly causing over/under contoured restorations
- Incorrect use of material
- Using composite resin when the pulpal margin is in dentine


Name some ways where you can damage the pulp-dentine complex (3)

- Overcutting / pulp exposure
- Excessive heat
- Excessive pressure


As an operator what advice should we tell the patient to avoid error of execution? (2)

- Review maintenance of oral hygiene
- Give self-care instructions


Flawed data suggests what about repair or replacing failed restoration? (2)

- Repairs have similar short term survival to
- Repairs are less invasive


When deciding to repair or replace a failed restoration what should you explain to the patient? (3)

- Explain treatment options and associated risks
- Discuss current state of evidence base underpinning treatment options
- Combine clinical expertise with patient’s informed choice


What structures made with a rose-head bur will improve auxiliary retention of a restoration? (3)

- Vertical grooves
- Angled Coves
- Horizontal slots