Evaluation of the nasopalatine canal with cone-beam computed tomography in an Iranian population

Zahra Dalili Kajan, Javad Kia, Safa Motevasseli, Saman Rokh Rezaian


Background: Implant placement plays a vital role in oral rehabilitation following loss of the incisors.

Thus, having knowledge of anatomical variations of adjacent neurovascular structures especially

the nasopalatine canal (NPC) is essential. Due to the lack of basic information in Iran about the

morphology of this canal and the probability of its variety in different populations, this study was

designed on an Iranian population.

Materials and Methods: In this descriptive study, we selected cone-beam computed tomography

images of 198 patients comprising of 98 males and 100 females in two dental groups (edentulous

or dentate). The shape of the nasopalatine foramen and the form of the canal in axial views were

assessed. Then, the canal height and its diameter at the palatal, middle and nasal levels in crosssectional

images were measured. The available bone in the buccal and palatal sides of the canal was

assessed. Data analysis was carried out using a Chi-square test and an independent t-test (P ≤ 0.05).

Results: The majority of the samples (81.8%) presented a single foramen. Cylindrical shape

(57.6%) was the most frequently detected canal form. The mean of the estimated canal height was

12.84 ± 2.88 mm. The canal diameter at the palatal level between the sexes and dental groups

showed statistically signifi cant differences.

Conclusion: In our investigated population, the NPC form was mainly cylindrical with a single

opening foramen. The mean of the canal height was higher than that found in other populations.

Furthermore, the canal diameter in the edentulous group was greater than that observed in the

other group.

Key Words: Cone-beam computed tomography, dental implant, maxilla, nasopalatine canal,

oral surgical procedure

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