Analysis of Factors Affecting the Accuracy of Static-guided Endodontics

To evaluate how template type, sleeve height, revolutions per minute (RPM), tooth type, drilling distance, and drill diameter affect the accuracy of static-guided endodontics.

In this in vitro study, 113 isolated premolars and molars collected from the oral surgery clinic and 10 three-dimensional printed resin teeth were mounted in a standard dental mold in their corresponding tooth positions. Cone-beam computed tomography and optical scans were obtained and co-registered. Templates were designed, and deviations were measured using Implant Studio (3Shape Unite, 3shape, Copenhagen, Denmark).

The angular deviation of the resin template (without metal sleeve) was higher than that of the metal template (P < .05). The apical linear deviation of the resin template (without metal sleeve) was significantly higher than that of the resin template (with metal sleeve) (P < .05). The coronal linear deviation of the metal template was higher than that of the resin template (with metal sleeve) (P < .05).The apical linear deviation of the resin template with 4-mm height sleeve was higher than that of the 6-mm and 8-mm height sleeves (P < .05), and there was no significant difference between the 6-mm and 8-mm height sleeves. Drill diameter, RPM, and tooth type (resin or isolated teeth) did not affect the accuracy of static guided endodontics.

The apical linear deviation increased with drilling distance. Resin templates (without metal sleeves) are not recommended. The accuracy of static-guided endodontics was not affected by drill diameter, RPM, or tooth type (resin or isolated teeth).