EFFECT OF DENTIN PREPARATION AND ACID ETCHING ON THE SEALING ABILITY OF GLASS-IONOMER AND COMPOSITE RESIN WHEN USED TO REPAIR FURCATION PERFORATIONS OVER PLASTER OF PARIS BARRIERS
Vt. Himel et Ha. Alhadainy, EFFECT OF DENTIN PREPARATION AND ACID ETCHING ON THE SEALING ABILITY OF GLASS-IONOMER AND COMPOSITE RESIN WHEN USED TO REPAIR FURCATION PERFORATIONS OVER PLASTER OF PARIS BARRIERS, Journal of endodontics, 21(3), 1995, pp. 142-145
Access openings and furcation perforations were prepared in 60 human e
xtracted teeth and randomly divided into four equal groups. Plaster of
Paris barriers were created in all perforations. The defects were obt
urated using either glass ionomer or composite resin with or without a
cid etching of the dentin. The pulp chambers and access openings were
filled with composite resin. After immersion in 2% methylene blue solu
tion for 2 weeks, the teeth were sectioned longitudinally and dye pene
tration was measured under a stereomicroscope using the NIH Image 1.47
Macintosh program. The results indicated that light-cured glass ionom
er provided a significantly better seal than did the right-cured compo
site resin with or without dentin preparation and acid etching. The gl
ass ionomer allowed significantly less dye penetration when used on et
ched dentin than it did on nonetched dentin.