Correlation Between the Orientation of the Nasopalatine Canal and the Upper Central Incisors: A Comparative...

During implant placement in the upper anterior region, the nasopalatine canal (NPC) is a frequently encountered anatomical structure. It connects the nasal and oral cavities and contains critical blood vessels and nerves. Despite its clinical relevance, no study has yet assessed the orientation of the NPC in relation to the upper central incisors to aid in optimal implant positioning. This study investigated the parallelism between the NPC and the upper central incisors (1.1 and 2.1) in both the mesiodistal and buccopalatal directions. Data were collected from 226 subjects, and statistical analyses included Pearson's correlation test, a one-sample t-test, and scatter plot analysis. The mean mesiodistal inclinations of the NPC, 1.1, and 2.1 were 87.54° ± 3.20, 86.55° ± 3.97, and 86.50° ± 3.63, respectively, while their buccopalatal inclinations measured 67.92° ± 6.89, 67.02° ± 6.88, and 67.23° ± 7.76, respectively. These findings indicate a strong correlation between the buccopalatal and mesiodistal inclinations of the NPC and the upper central incisors, with no significant differences observed. These results align with the existing literature on the anatomical variability and clinical significance of the NPC. This correlation suggests that evaluating the spatial relationship between the NPC and adjacent teeth could enhance implant surgery planning, leading to improved clinical outcomes and minimizing complications such as hemorrhage or paresthesia.