In vitro study to compare the sealing ability of a hydroxyapatite endodontic sealer with other Sealers (Quantitative Measurement)


This study is designed to compare and evaluate the sealing ability of a new Iraqi hydroxyapatite-containing endodontic sealer and other sealers using spectrophotometric system as a quantitative measurement of the volume of dye penetration into root canals. Fifty single-rooted extracted human teeth were used.Step-back technique was used to flare and enlarge the canals, the teeth were divided into five groups according to the type of sealer used: Group I:Zincoxideeugenol cement sealer, Group II: ZOE + hydroxyapatite (Iraqi), Group III: Glass ionomer cement sealer, Group IV: GIC + hydroxyapatite (Iraqi), Group V: Calcium phosphate cement + zincoxide(Wach's cement).All groups were immersed in methylene blue dye for one week then dissolved in 50% nitric acid and filtered then centrifuged. The leakage was assessed quantitatively using a spectrophotometric system. The results showed that calcium phosphate cement + zincoxide,(Wach's cement) had the lowest mean of dye leakage, followed by glass ionomercement sealer, then glass ionomer cement Sealer + hydroxyapatite, while ZOE had the highest mean of dye penetration into the filled root canal, The newly developed Iraqi hydroxyapatite containing endodontic sealer was as effective as the other tested sealers concerning apical microleakage.