Amalgam crown restorations for posterior pulpless teeth.

Cast restorations are the usual technique chosen for the restoration of posterior pulpless teeth. Complex amalgam restorations are suggested as an alternative method of treatment, and several advantages are described. Techniques to provide sufficient retention and resistance form include the use of threaded pins, amalgapins, slots and grooves, amalgam in the pulp chamber, or canals, or both, and posts cemented within the canals. The practicing clinician is advised to become familiar with these retention techniques so that difficult retention situations may be treated effectively.