To compare success rates of teeth with three different retrofills.
-N=488 apicoectomy cases for 2 distinct private practicing endodontic offices.
-recall period of 6 months-10yrs.
-examined super EBA, IRM, and zinc free amalgam as retrofills.
–success: healed lesion is complete regeneration of PDL.
-Super EBA: 95%
Super EBA and IRM are superior retrofill materials vs. amalgam