Indications and Contraindications of Retentive pins

.

1. Mohammed A. Alawad

2. Cemented ThreadedFrictional

3. Indications:
Increasedresistanceandretentionform is
needed.
As additional aids ofretentionin badly
broken down or mutilated teeth.
In teeth withpoor prognosis i.e.
endodonticallyandperiodonticallyinvolved
teeth.

4. Indications:
ECONOMIC FACTOR: When costis a major factor for the patient,
pin-retained restorations may be a cheaper alternative in complex
situations.
AGE AND HEALTH OF PATIENT: For geriatric and debilitated
patients, pin-amalgams are the preferred choice over cast restorations.
Can be used with

5. Indications:
When one or more cusps needcapping.

6. Contraindications:
XWhenthere'sa risk ofperforatingthe external tooth
structure
XAnterior teeth, except cases where there’s no gross loss
oftooth structure

7. Contraindications:
XPulpalexposure, where stresses are loaded on the pulp
XWhen theres great need of Amalgam strength(Pins
weaken the restoration)

8. Contraindications:
XIf the patient has significantocclusalproblems.
XIf the tooth cannot be properly restored with a direct
restoration because ofanatomic and/or
functionalconsiderations.

9. Sturdevant’sArt and science of operative
dentistrybyTheodore M Roberson. (5th
Edition)Chapter 19 -Page 815-824

10. End