The DentaPort ZX OTR is an advanced endodontic system module that combines precise apex location with safe, efficient canal preparation when used with the Morita DentaPort Root ZX apex locator. It integrates an endodontic micromotor with the OTR function, which optimizes torque during rotary filing by automatically reversing the file when preset torque limits are reached  helping reduce file fatigue, microcracks and breakage. The system displays real-time file tip position and offers multiple speed and torque settings, enhanced safety functions, and ergonomic design to support gentle and accurate root canal shaping .