CUSPAL COVERAGE INDIRECT RESTORATIONS

Question 1

4 indications for a cuspal coverage restoration?

Answer 1

1.** Preserve the integrity of a weakened tooth**.
2. Reinforcement of the tooth.
3. Less cuspal deflection and thus BETTER PROTECTION of remaining tooth tissue.
4. Correct occlusal discrepancies/ part of the restorative reorganisation of the occlusal scheme.

Question 2

What did Aqualino et al say about cuspal coverage in root treated teeth? What type of study was this?

Answer 2

• Endodontically treated teeth not crowned after obturation were lost 6 TIMES GREATER RATE than teeth crowned.
• Retrospective cohort study.

Question 3

4 types of cuspal coverage restorations?

Answer 3

• Onlays.
• Inlays with cuspal coverage.
• 3/4 crowns.
• 7/8 crowns.

Question 4

6 Factors that determine the decision on whether a cuspal coverage vs an intracoronal restoration will be used?

Answer 4

1. Whether the tooth is endodontically treated.
2. The amount and distribution of tooth structure remaining.
3. The type and amount of load applied on the tooth during function.
4. The parafunctional habits of the patient.
5. The aesthetic demands of the tooth.
6. The knowledge and experience of the dentist.

Question 5

What did a systematic review by Afrashtehfar et al find regarding the failure of single unit restorations?

Answer 5

• Failure rates of treatments may depend on the AMOUNT OF REMAINING TOOTH STRUCTURE and TYPE OF TREATMENT.
• Post retained crowns –> more favorable in teeth with 1 to 2 remaining coronal tooth walls.
• Post free crowns –> superior when greater tooth structure was available.
• Restorations in teeth without ferrules had such high failure rates that other Tx options should be considered.