Value of CT scanning imaging in morphologic analysis of embedded bone mass in back ankle
Objective To study the value of ComputedTomography(CT)for the morphological analysis of the embedded bone mass in the posterior ankle.Methods The retrospective study included 100 patients with ankle fracture involving the posterior ankle admitted to Puyang People's Hospital from May 2022 to April 2024 as the research objects.The clini-cal data of the patients were retrospectively analyzed.According to whether the posterior ankle had embedded bone mass in the CT examination,the patients were divided into the non-embedded bone mass group and the embedded bone mass group,and the basic information of the two groups was collected and compared.The location,type,involved location and fracture mass of the ankle,as well as the location,size,shape and area of the embedded bone mass in the back an-kle were analyzed by Pearson correlation analysis to analyze the correlation between the area of the embedded bone mass in the back ankle and the related parameters of the posterior ankle fracture.Results CT results showed that there were 71 patients with embedded bone mass in the back ankle,accounting for 71.00％,and 29 patients with no embedded bone mass in the back ankle,accounting for 29.00％.There were no significant differences in gender,age,fracture lo-cation,Lauge-Hansen classification and Danis-Weber classification between the two groups(P＞0.05),but there were significant differences in Haraguchi classification and Mason classification between the two groups(P＜0.05).Haraguchi type 1(87.32％)was higher than type 2(8.45％)and type 3(4.23％)(P＜0.05).Mason type 2A(71.83％)was higher than type 1(11.27％),type 2 B(9.86％)and type 3(7.04％)(P＜0.05).The incidence rates of medial malleolus and fibular notch of tibia involved in bone block embedding group were 36.62％and 73.24％higher than those in non-embedding group(6.90％and 37.93％).The length of fibular notch and posterior malleolar fracture involved in bone block embedding group was longer than that in non-embedding group,and the area of posteri-or malleolar fracture was larger than that in non-embedding group(P＜0.05).The position of external 1/3(63.38％)was higher than that of middle 1/3(19.72％)and inner 1/3(16.90％)(P＜0.05).The sagittal diame-ter of 2-5mm(46.48％)was higher than that of＜2mm(21.13％)and＞5mm(32.39％)(P＜0.05).There was no significant difference in the incidence of fracture blocks(P＜0.05).The area of embedded bone mass in the posterior ankle ranged from 4.71 to 196.41mm2,with an average of(61.42±5.73)mm2.Conclusion There are Haraguchi 1 and Mason2A types of ankle fractures.The fracture involvement of medial malleolus and fibular notch of tibi-a suggests a higher risk of bone embedding in posterior ankle,and the area of bone embedding in posterior ankle has a certain correlation with the area of posterior ankle fracture.In the posterior ankle,1/3 of the bone is inserted,and the size is 2～5 mm sagittal diameter.CT examination is helpful to analyze the injury mechanism of ankle fracture and deter-mine the position,size and shape of the embedded bone mass in the back ankle,so as to provide reference for clinical diagnosis and treatment.
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