Evaluation of the size and position of the infraorbital canal in relation to the maxillary sinus in CBCT images of patients referred to the Oral Radiology Department of Tabriz faculty of Dentistry in 2018-2019 : A retrospective study

Abstract

Background/Aim: Evaluating the morphology of infra-orbital canal and its indexes due to maxillary sinus as an important structure of midface can provide better clinical access to infra-orbital canal and anesthesia of dental branches of infra-orbital nerves. Different studies showed the relationship between morphology and anatomy of fissure and canal o infra-orbital using human skulls, Cephalometric radiographs and 3D patterns based on CT scans. However, there are few information about anatomy of infra orbital canal and fissures using CBCT analysis. Therefore, this study was conducted with the purpose of evaluating the length and position of infra orbital canal in relation to maxillary sinus in the CBCT scans of patients recurring to radiology department of Tabriz dental faculty at the years of 2019-2020. Methods/Materials: The present study had retrospective descriptive method. For conducting this study, CBCT scans from Archive of Tabriz Dental School were selected. In this study which was full-counting, all of the recurring patients to Tabriz dental faculty which had the inclusion criteria at the years of 2019-2020 were evaluated. Primary results contained the length and diameter of IOC (Infra Orbital Canal). The Results were reported using Average/Percent plus standard deviation. Secondary results consisted gender and age of patients, types of infra orbital canal, and determination of the lengths of specific landmarks. For comparing the diameter and length of IOC in different positions of sinus, after checking the normality of data with Kolmogorov-Smirnov test, one-way ANOVA was used. Significant level of this study was p<0.05. for analyzing of data 24th version of SPSS was used. Results: The average diameter of IOF in all studied cases were 3.16 mm, and also the average length of IOF/C was 24.51, the average diameter of IOC was 1.89 mm and the average length of CS was 4.42 mm, and also the concluded results from this study showed that the most infra orbital type in patients was the first type with 56.3 percent of all canals, and the least prevalence was type 3 with 9.9 percent of all types. The average of all variables in men were more than women, and also in persons with type3 canals showed more length of IOF/C, CS and diameter of DC. The only exception IOF diameter in patients with type2 of canals. None of evaluated variables in different types of canals were significantly different(P>0.05). same results observed in evaluated variables and gender, although the average of length and diameter of variables were more in men but this differences were not significant(P>0.05). Conclusion: The overall results of this study showed that the most type of infra orbital canal in studied cases was type1 canal. And also there was no significant statistical relation between evaluated anatomical variables in this study with gender and type of infra orbital canals of patients.