<Judgment> Clinical evaluation (signs and symptoms // compare between before and after RCT) Radiographic evaluation (( Length / Density / Shape )) ”Taper” <Success rate comparison> > > Obturation 0-1 mm short 1-3 mm short long beyond the apex << So, to be short is better than to be long! >> When we go beyond the apex we create continuous source of irritation and we cannot guarantee proper seal. <Coronal seal!> It is important to provide good coronal seal. 60% of RCT failures due to restorative reasons (inadequate coronal seal and failed permanent restoration) 30% of RCT failures due to periodontal reasons 10% of RCT failures due to endodontic reasons >> Gutta percha cannot withstand contamination with saliva << So, 6 teeth out of 10 fail due to improper restorative procedures (improper coronal seal) <Filling materials> Ideal properties: Radio-opaque Easy to handle Biocompatible Dimensional stability Can be removed easily Bonding to tooth structure Resistance to fracture Prevent microleakage
<Judgment> Clinical evaluation (signs and symptoms // compare between before and after RCT) Radiographic evaluation (( Length / Density / Shape ”Taper” )) <Success rate comparison> Obturation 0-1 mm short > 1-3 mm short > long beyond the apex << So, to be short is better than to be long! >> When we go beyond the apex we create continuous source of irritation and we cannot guarantee proper seal. <Coronal seal!> It is important to provide good coronal seal. 60% of RCT failures due to restorative reasons (inadequate coronal seal and failed permanent restoration) 30% of RCT failures due to periodontal reasons 10% of RCT failures due to endodontic reasons >> Gutta percha cannot withstand contamination with saliva << So, 6 teeth out of 10 fail due to improper restorative procedures (improper coronal seal) <Filling materials> Ideal properties: Radio-opaque Easy to handle Biocompatible Dimensional stability Can be removed easily Bonding to tooth structure Resistance to fracture Prevent microleakage
ConsV%2CSheet21.docx