Apical Gauge File (AGF)

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Presentation transcript:

Apical Gauge File (AGF) Definition The Largest NiTi 0.04 Hand File that fits at Corrected Working Length after Access to the Apical Third has been accomplished. Please note that NO INSTRUMENTATION of the Apical Third has occurred. Negotiation only with “twiddling” motion, NOT reaming or filing.

Apical Gauge File (AGF) Rationale To help when initial Working Length Determination requires modification To prevent over-instrumentation potentially caused by increase in working length after Straight Line Access is accomplished (Schroeder et al. 2002), especially in curved canals. a b c File is same length, but now potentially extrudes out the apex Schroeder KP, Walton RE, & Rivera EM. J Endod. 2002;28:474.

Pre-Op WL WL angled AGF; Long on P. Readjusted length Trial Pack Obturation. Sealer extruded

Pre-Op WL AGF; Long on P. Readjusted length Note: Over-Instrumentation of the Palatal canal would have occurred if AGF film had not been evaluated. Obturation. Sealer extruded Trial Pack

Apical Gauge File (AGF) How to Determine Use NiTi 0.04 Hand Files 15 20 25 30 35 (does not go to length) 30 would be the AGF Note that it is not required to make the WL Film, AGF Film, and MAF Film in every case

Apical Gauge File (AGF) How to Record Start Instrumentation of the Apical Third with the AGF at Actual Working Length. Determine need for MAF vs Trial Pack Radiograph Canal Ref Cusp EWL (mm) Negotiation (yes/no) WL File Size (usu. SS) CWL Access to Apical 1/3 AGF File (usu. NiTi) Length AWL Apical Prep (Stop/Open) MAF File Obturation Acceptable