Working length determination is one of the most critical steps of root canal preparation. Measuring the length of the tooth indicates the apical limit of instrumentation and filling. Traditionally, working lengths are determined by taking radiographs. The development of electronic apex locators (EALs) has helped to determine working lengths more accurately and efficiently. An EAL is a device developed to determine the position of the apical foramen by specific differences in the resistance to electrical currents using electrodes positioned at the patient’s lip and attached to the endodontic file. Currently, the use of state-of-the-art apex locators—which measure by impedance differences—makes accurate location of the apical foramen possible, allowing the dental professional to respect the anatomical and morphological limits of the canal, thereby imparting greater predictability to endodontic treatment.
Owing to EALs’ ease of use and high rate of clinical success (around 80–96 per cent) in accurately measuring canal length, the use of EALs is now considered routine in endodontic practice. Their use in all cases, coupled with radiographs, can be considered indispensable. For this reason, several brands of products with differences in operating principle, design, warning sounds produced, screen models and other variables are available on the market.
Recently, a new device with attractive features was launched by VDW: the VDW.CONNECT Locate smart apex locator. The locator is a cordless device with delicate dimensions (length: 75 mm; width: 46 mm; height: 20 mm) and is very light in weight (80 g). In my experience, it therefore simplifies the workflow and positioning during clinical use. It can be employed alone using friendly LED and acoustic signals or it can be used together with VDW.CONNECT Drive, a cordless handpiece for rotary or reciprocating motion.
Among the features of VDW.CONNECT Locate is its Bluetooth function, allowing the device to be hooked up to VDW.CONNECT Drive and the VDW.CONNECT App. Available through the app (for iPad), additional features can help clinicians in their daily tasks. It allows control and stability in all situations and helps to visualise the file progress inside the root canal on the iPad screen. Customisable settings, file sequences and working lengths and a reverse function round off a product I use on a daily basis.
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