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A simple system for improving the accuracy of IZC bone screw placement

An operator often finds it hard to assess the ideal timing to start angulating the driver while placing infrazygomatic crest screws. Thus, we have designed a simple system to guide the operator to know exactly when the angulation of the driver should be started for the ideal placement of the IZC screw. The components of the system include the calculation of the amount of tissue that needs to be pierced perpendicularly and the fabrication of an indicator device over the implant driver with a stainless steel wire. Hence, using this system, the proper timing for angulation can be obtained, thus improving the accuracy of placement.