Apex Locator
Free!
An apex locator is a chairside device that measures canal length electronically during root canal therapy. It shows the file’s position relative to the apex in real time, even in wet canals. Dentists choose it to cut radiographs, avoid over-instrumentation, and finish cases faster. Clear displays, audible guides, and autoclavable clips make it a dependable, hygienic tool for accurate endodontic results.
Description
An apex locator is an electronic device used during root canal treatment to identify the apical constriction and establish an accurate working length. It measures the electrical impedance between a file inside the canal and a reference electrode, then converts that data into a real-time position on the display. Modern multi-frequency designs maintain accuracy in the presence of fluids such as sodium hypochlorite, blood, or saline, making them reliable across typical clinical conditions.
Key features and benefits
• Multi-frequency measurement for consistent readings in wet or dry canals
• Large, high-contrast screen with clear bar graph and numeric distance to apex
• Audible indicators that free your eyes from the display while operating
• Autoclavable file clip, lip hook, and touch probe for infection control
• Automatic calibration and zeroing to shorten setup time
• Compact, rechargeable base for a clutter-free operatory
Why clinicians use it
• Determines working length precisely, reducing over- or under-instrumentation
• Cuts the number of confirmation radiographs, saving time and exposure
• Improves shaping outcomes and obturation fit, which supports long-term success
• Helps standardize results across operators and training environments
Typical applications
• Routine endodontic therapy in general practice and specialty clinics
• Retreatment cases where apical reference points are unclear on radiographs
• Teaching labs that require repeatable, objective working-length control
How it compares
• Versus radiographic estimation: far less guesswork and fewer images.
• Versus older single-frequency units: better stability in electrolytic or bleeding canals.
• Pairs well with rotary or reciprocating files and obturation systems for a complete workflow.
Selection notes
• Look for replaceable, autoclavable accessories and a clear display.
• Consider models with automatic power-off and long battery life for busy schedules.
