Conclusions : The probability for success for EMS proved to be significantly greater than the probability for success for RES , providing best available evidence on the influence of cavity preparation with ultrasonic tips and /or SuperEBA ( Keystone Industries , Gibbstown , NJ ) , IRM ( Dentsply Sirona , York , PA ) , MTA , or silicate cements as root‐end filling material instead of a shallow cavity preparation and placement of a resin‐based material .
HIGHLIGHTSEndodontic microsurgery ( EMS ) with the use of high‐magnification ultrasonic root‐end preparation and root‐end filling with SuperEBA , IRM , MTA , or other calcium silicate cements has a high probability of success .
Resin‐based endodontic surgery with the use of high‐magnification preparation of a shallow concave root‐end cavity with bonded resin‐based root‐end filling material performed less favorably than EMS
Introduction : The aim of the present study was to investigate the influence of root‐end preparation and filling material on endodontic surgery outcome .
Retrograde root filling with dentin-bonded modified resin composite.
A  retro grade root-end cover with a special resin composite ( Retroplast ) combined with the dentin bonding agent Gluma ( Bayer AG ) has been used since 1984 by the authors . Its content of silver , added to promote radiopacity , has been found to lower the working time and storage stability of the composite and might cause discolorations . Since 1990 , silver has therefore been replaced with ytterbium trifluoride , which eliminates these side effects . The purpose of this study was to compare the clinical results obtained with these two resin composites and to evaluate the healing results after several years in function . Apical fillings ( 351 ) with the modified Retroplast  showed the following radiographic healing pattern 1 yr after surgery : 80 % complete healing , 2 % scar tissue , 12 % uncertain healing , and 6 % failure . No significant difference in this healing pattern was found , compared with that obtained with the silver-containing Retroplast . Cases with ytterbium trifluoride classified as scar tissue and uncertain healing at 1 yr when examined at 2 to 4 yr postoperatively showed 89 % complete healing . 0 % scar tissue , 1 % uncertain healing , and 9 % failure . This result is significantly different from that obtained 1 yr after surgery . Based on calculations , it was predicted that with time 90 % will become complete healing , whereas 10 % will become failure
Conclusions : The probability for success for EMS proved to be significantly greater than the probability for success for RES , providing best available evidence on the influence of cavity preparation with ultrasonic tips and /or SuperEBA ( Keystone Industries , Gibbstown , NJ ) , IRM ( Dentsply Sirona , York , PA ) , MTA , or silicate cements as root‐end filling material instead of a shallow cavity preparation and placement of a resin‐based material .
HIGHLIGHTSEndodontic microsurgery ( EMS ) with the use of high‐magnification ultrasonic root‐end preparation and root‐end filling with SuperEBA , IRM , MTA , or other calcium silicate cements has a high probability of success .
Resin‐based endodontic surgery with the use of high‐magnification preparation of a shallow concave root‐end cavity with bonded resin‐based root‐end filling material performed less favorably than EMS
Introduction : The aim of the present study was to investigate the influence of root‐end preparation and filling material on endodontic surgery outcome .