Obturation Techniques

Dry canal with paper points

Confirm no bleeding or exudate. The canal must be dry before obturation.

Fit master cone to working length

Verify tug-back at WL. The cone should seat passively and resist withdrawal with gentle pull.

Coat apical 3–4 mm of cone with bioceramic sealer

Apply a thin, uniform layer. Sealer should fill the gap — not the cone.

Insert cone to full WL

Slowly seat with slight apical pressure. Do not force past working length.

Sear excess GP at orifice level

Use System B or heated plugger to remove excess GP at the orifice.

Compact with cold plugger

Apply light apical pressure to condense the GP coronally.

Verify with periapical radiograph

Confirm GP extends to WL with no voids or overextension.

Fit master cone — tug-back at WL

Trim if needed. Confirm fit radiographically.

Select System B plugger

Choose a plugger that binds 3–5 mm short of WL.

Apply thin sealer coat to canal walls

Use a paper point or lentulo spiral. Minimal sealer is key.

Seat master cone to WL

Confirm full seating with gentle apical pressure.

Activate System B at 200°C — advance with steady pressure

Maintain constant apical force while the plugger softens and condenses the GP.

Reach binding point → hold 10 seconds → release trigger

Sustained pressure ensures GP flows into irregularities before it cools.

Activate briefly (1-second burst) and withdraw

This separates the GP cleanly at the plugger tip level.

Compact with cold plugger

Apply firm apical pressure to condense the remaining GP apically.

Load Obtura gun with GP at 160–200°C

Ensure GP flows freely before placement.

Place needle 2 mm from compacted GP

Position the backfill needle tip within the canal space above the downpacked GP.

Inject GP in 3–4 mm increments

Compact each increment with a cold plugger before adding the next.

Fill to orifice level

Do not overfill. The coronal seal is completed by the final restoration.

Select obturator matching final file size

Verify with the included verifier — it must reach working length passively.

Apply thin sealer to canal walls

Use minimal sealer to avoid extrusion. A lentulo spiral or paper point works well.

Heat obturator in oven per manufacturer timing

Follow the exact heating time for the selected size. Overheating degrades the GP.

Insert in one continuous motion to WL

Do NOT stop during insertion. A single, smooth, continuous motion is critical for proper placement.

Hold firm apical pressure for 10 seconds

Maintains GP adaptation to canal walls as it cools.

Sear handle at orifice level

Use Thermacut bur or heated instrument to remove the handle and excess GP.

Compact coronally with cold plugger

Light pressure to ensure a dense coronal seal.

Fit master cone to WL — tug-back

Confirm apical fit radiographically.

Coat canal walls with sealer

Use lentulo spiral or paper point for even distribution.

Seat master cone

Insert to full working length with gentle apical pressure.

Place finger spreader alongside master cone

Press apically with lateral motion to create space for accessory cones.

Remove spreader and immediately place accessory cone

Fill the space created by the spreader before the GP rebounds.

Repeat spreader + accessory cone cycle

Continue until the spreader penetrates less than 3 mm into the canal.

Sear excess GP at orifice and compact

Use heated instrument to remove excess, then compact with cold plugger.