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Apical Gauge File (AGF)

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.

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Apical Gauge File (AGF)

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  1. 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.

  2. c a b 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. File is same length, but now potentially extrudes out the apex Schroeder KP, Walton RE, & Rivera EM. J Endod. 2002;28:474.

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

  4. 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

  5. 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

  6. 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

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