Dentsply Sirona Propex Pixi Apex Locator
Dental Supplies

Dentsply Sirona Propex Pixi Apex Locator

Pack Sizes Available

Complete kit: Propex Pixi unit + switching charger + measurement cable with lip clip + connection hook

Product Description

Working length determination used to mean one thing: a radiograph. Take the diagnostic film, estimate the canal length, place the file, take a confirming film, adjust, repeat. Every step adds time and adds radiation. The electronic apex locator changed this equation considerably. Today, working length is confirmed electronically in seconds, and the radiograph serves as a check rather than the primary measurement. The Dentsply Sirona Propex Pixi is a pocket-sized electronic apex locator that uses multi-frequency technology to locate the minor apical foramen by analysing the electrical properties of the different tissues inside the root canal. The device detects the characteristic impedance change that occurs as the file tip approaches and reaches the apical constriction — the minor foramen — and displays this as a bar-graph progression on a colour LED screen. Four volume levels of progressive audio feedback run alongside the visual display so the clinician receives both channels simultaneously without constantly looking at the screen. Critically, the Propex Pixi requires no calibration and no zero adjustment before use. Turn it on, attach the lip clip and connection hook, insert the file, and the measurement begins. In a busy endodontic practice or a general practice with limited endodontic volume, this simplicity matters — the less setup there is, the more reliably the device gets used on every case rather than only when the clinician feels the setup is worth the time. The unit is rechargeable, pocket-sized at just 55.5mm wide and 64.5mm high, and designed to be placed on the patient's chest during measurement, positioning the LED display in the direct line of sight while keeping the cable geometry tidy. A fully charged battery provides approximately 100-150 working length determinations. The Propex Pixi works reliably in both dry and wet canals — important because the clinical reality of endodontic irrigation means canals are not dry when measurements are taken. Sara Wellness exports Dentsply Sirona endodontic equipment and instruments to dental distributors internationally.

Technical Specifications

  • Technology: Multi-frequency impedance measurement — locates minor apical foramen
  • Display: Colour LED bar-graph with progressive audio feedback (4 volume levels)
  • Accuracy: 97.7% (claimed) — works in dry and wet canals
  • Dimensions: 55.5mm wide x 64.5mm high x 17.5mm deep — pocket-sized
  • Power Source: Rechargeable battery (AAA 1.2V NiMH); ~100-150 determinations per full charge; 12h recharge
  • Setup: Zero calibration required; no zero adjustment — ready to use on power-on
FAQ

Frequently asked questions

The Propex Pixi has a claimed accuracy of 97.7% for apex location. This means that in 97.7% of measurements, the device correctly identifies the position of the apical foramen within the clinically accepted tolerance range (typically ±0.5mm from the true foramen). Accuracy can be affected by patient-specific factors including the presence of metal crowns or bridges that contact the file, very dry canal conditions, and presence of radio frequency sources in the environment.

The scale on the Propex Pixi screen does not represent millimetres or any linear unit. It represents the file's progression towards the apex — a relative indication of proximity to the foramen. The '0.0' indication corresponds to the minor apical foramen position. The 'OVER' indicator means the file has passed the minor foramen. The working length is typically established 0.5-1.0mm short of the '0.0' position, corresponding to the apical constriction.

Yes. The Propex Pixi uses multi-frequency impedance measurement technology that is designed to function reliably in both wet and dry canal conditions, including canals containing sodium hypochlorite or saline irrigant. However, the access cavity must be dried with a cotton pellet before measurement to prevent current leakage between the connection hook and adjacent metallic structures or excess irrigant in the coronal access area.

No. The Propex Pixi is contraindicated in patients with cardiac pacemakers or other implanted electrical devices. The device passes a small electrical current through the oral tissues as part of its impedance measurement, which could theoretically interfere with the function of implanted electronic medical devices. Alternative working length determination methods (radiographic technique) should be used for these patients.

A fully charged Propex Pixi battery is sufficient for approximately 100-150 working length determinations. For typical clinical use — where one to four root canals are measured per patient — a fully charged unit provides a generous supply of measurements before recharging is needed. When the battery indicator begins blinking, the device should be charged overnight. A standard recharge takes approximately 12 hours (24 hours after extended non-use).

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