Purpose: This study investigated the impact of the guide hole height on the accuracy of implant placement using CAD/ CAM-fabricated surgical guides in resin models. The hypothesis is that decreasing the height of the guide hole reduces place ment accuracy. Materials and Methods: Ten identical partially edentulous maxillary models were each fitted with surgical guides featuring guide hole heights of 1 mm, 3 mm, and/or 5 mm. Using a surgical guide and drill kit, implants were placed in six predetermined sites per model. Placement accuracy was evaluated by comparing the actual implant positions with the planned positions using digital scanning and computer software analysis. Statistical analyses were performed using ANOVA and Kruskal-Wallis tests to determine the significance of deviations at both the coronal and apical positions. Results: The av erage deviations were 0.75±0.33 mm at the coronal position and 1.10±0.51 mm at the apical position. Placement accuracy did not differ with different guide hole heights. Additionally, errors were consistent regardless of the guide hole height and were not influenced by the type of support or the implant placement site. Conclusion: In this rotro study, varying the height of the guide hole did not significantly affect the accuracy of implant p...