Figure 2: (a-c) IEA: (a) Resin tooth without template/guide, (b) Black arrow indicates the size of the access opening using free-hand approach, (c) Segmentation process for postoperative volume calculation; (d-f) SGEA: (d) Resin tooth with single-tooth template positioned, Black arrow indicates the guided opening (e) Black arrow indicates the size of the access opening initiated using the template, (f) Segmentation process for postoperative volume calculation; (a and d) Pre-experiment; (b and e) Intra-experiment; (c and f) Post-experiment. IEA: Incisal endodontic access, SGEA: Single-tooth template-guided endodontic access