Fig. 5
The two 3D-printed MB and ML templates and optional training model of the patient’s low dental arch (a). 1, Handles of the open template; 2, lock-arms that fit the target tooth and the neighboring teeth to increase the stability of the guide; 3 the top of resin cylindric bases of the sleeves as a reference for the working length of the drill; 4, the sleeves’ resin cylindric bases; 5, the sleeve for the fixation pin. The template stability must be previously evaluated (b). The drill was positioned inside the metal sleeve following the access direction as planned in the CAD phase (c). Final XR image after the guided access and endodontic treatment (d). The XR image of one-year follow-up (e)