Morphological anomalies of sella turcica patients with maxillary impacted canines:A cone-beam computed tomography study
Objective To investigate the correlations between morphological variations of sella turcica and the buccally and palatally impacted maxillary canines(BIC/PIC)using the cone-beam computed tomography(CBCT)to assist prediction and prompt clinical inter-vention.Methods One hundred and twenty-five patients with impacted maxillary canines(experimental group)and 125 gender,age and Angle's classification matching subjects with normally erupted canines(control group)were included into this study.The experi-mental group were later divided into the buccally-impacted canine(BIC)and palatally-impacted canine(PIC)sub-groups.CBCT data of all samples were imported into Dolphin software for reconstruction of lateral cephalograms and 3D images.The incidence along with the distribution type(type Ⅰ,Ⅱ,Ⅲ)of sella turcica bridging in each group were observed and recorded.SPSS 25.0 software was em-ployed for statistical analysis of the results.Results The incidence of sella turcica bridging in the experimental group was significantly higher than that of the control group(P=0.004).In PIC subgroup also,the incidence was significantly higher than that of control group(P=0.007).Significant statistical differences were found in type Ⅱ and Ⅲ sella turcica bridging distribution type between PIC sub-group and control group(P=0.012).However,regarding BIC sub-group,no significant difference was noticed concerning the sella tur-cica bridging occurrence compared to control group.There was also no significant difference in the incidence of sella turcica bridging in 3D reconstructed images among all groups(P＞0.05).Conclusion There is a correlation between the impacted maxillary canines and the incidence of sella turcica bridging.However,the sella turcica bridging is more likely to occur only in PIC patients,while no recog-nizable morphological variation is detected in BIC patients regarding sella turcica.
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