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Obturation: Lateral Compaction. Presented by: Josef Ma. Karlos S. Bringas, D.M.D., D.D.S., M.S. Department of Endodontics. Objectives of Obturation.
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Obturation: Lateral Compaction Presented by: Josef Ma. Karlos S. Bringas, D.M.D., D.D.S., M.S. Department of Endodontics
Objectives of Obturation • Create a complete seal of the entire root canal system by eliminating all avenues of leakage from the oral cavity or the periradicular tissues into the root canal system. • To seal within the system any irritants that cannot be fully removed during canal cleaning and shaping procedures.
Completed C&S • The canal system should be properly tapered in a continuous funnel shape allowing debridement, irrigation and obturation.
Completed C&S Note your FWL. *FWL is 1mm short of patency length. Example: • FWL=23mm
Obturation • The canal is obturated to Final Working Length. • Obturation Length = FWL
Obturation • The canal is obturated to Final Working Length. • Obturation Length = FWL
Spreader Fit • To check satisfactory apical cleaning and shaping before obturation. • To see if there is enough room for compaction with the selected finger spreader. (size: medium fine MF) • Set rubber stop 1-2mm short of FWL.
Spreader fit • Fit within 1-2mm of FWL. • If not, more shaping is required because apical size and taper is inadequate.
Master Cone Fit • Select Master Cone size that corresponds to your MAF size. • Ex. MAF size 30 • MC size should also be size 30.
Master Cone Fit • The Master Cone should seat to final working length. • Obturation length= FWL
Master Cone Fit • If MC is at FWL, you are ready to obturate. 23
Master Cone is Long • Cut the Gutta Percha tip to correct the discrepancy to avoid overextension.
Master Cone is Short • Cleaning and shaping is rechecked.
MC is short • Reinsert MAF file. • Sometimes, dentin filings prevents it from seating to FWL.
Reshape • Check to see if MAF goes to FWL. • Go through hand filing procedure. • Sometimes, repeating C&S with rotaries is necessary.
Refit MC • After filing with the MAF to FWL, the selected Master Cone should fit to proper FWL also.
Master Cone Fit • The MC should have a definite apical resistance when MC is placed to FWL. • The MC should exhibit “tugback” or resistance to removal.
Take a Radiograph • Master Cone 4th of 6 • Show radiograph to instructor. • Dry the canal and you are now ready to obturate.