Application of T2 mapping quantitative analysis in preoperative and postoperative long-term follow-up of patients with chronic ankle instability
Objective To evaluate the degeneration of joint cartilage in patients with chronic ankle instability before and after surgery by exploring T2 mapping quantitative analysis.Methods Sixty patients with chronic ankle instability who underwent anterior talofibular ligament(ATFL)repair or reconstruction treatment in our hospital from January 2021 to June 2022 were selected as the research subjects.They were divided into ATFL repair group(n=30)and ATFL reconstruction group(n=30)according to the treatment method.Another 30 healthy subjects were selected as the control group.The ATFL repair group and ATFL reconstruction group underwent MRI T2 mapping scan,ankle plantar flexion,back extension mobility,pain visual analog score(VAS)and American ankle-hind foot functional system(AOFAS)and Karlsson ankle function score(KAFS)evaluation before and one year after surgery,the control group underwent MRI T2 mapping scans,and the T2 values of the anterior medial,lateral,and central medial,lateral,and posterior medial,and lateral cartilaginous regions of the talus were measured and calculated in three groups.Results The T2 values of the ATFL repair group were higher than those of the control group(P<0.05)in the medial,anteromedial,and lateral cartilage areas before surgery;The T2 values in the medial,lateral,anteromedial,and lateral cartilage regions of the ATFL repair group were higher than those in the control group one year after surgery(P<0.05);The T2 values in the medial and anterior medial and lateral cartilaginous regions of the bone crest in the ATFL repair group were higher than those before surgery at 1 year(P<0.05).The T2 values of the ATFL reconstruction group were higher than those of the control group(P<0.05)in the medial,lateral,anteromedial,and lateral cartilaginous areas before surgery;The T2 values in the medial,lateral,anteromedial,and lateral cartilage regions of the ATFL reconstruction group were higher than those in the control group one year after surgery(P<0.05);The T2 values in the central lateral and anterolateral cartilaginous regions of the bone crest in the ATFL reconstruction group were higher than those before surgery one year after surgery(P<0.05).There was no statistically significant difference in T2 values between the ATFL repair group and the ATFL reconstruction group in each cartilage region before and 1 year after surgery(P>0.05).One year after surgery,the ankle plantar flexion and dorsal extension activities in the ATFL repair group and ATFL reconstruction group were greater than preoperative(P<0.05),the VAS scores were lower than preoperative(P<0.05),the AOFAS and KAFS scores were higher than preoperative.Conclusion Patients with chronic ankle instability may still experience talar cartilage degeneration after ATFL repair or reconstruction treatment,mainly on the anterior and central sides of the talus.T2 quantitative analysis can evaluate the degree of talar cartilage degeneration in patients with chronic ankle instability after surgery.
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