Abstract
PurposeThis study was to evaluate changes of the mechanical loading pattern after anatomic anterior cruciate ligament (ACL) reconstruction by analyzing uptake patterns using combined single-photon emission computerized tomography and conventional computerized tomography (SPECT/CT).Materials and MethodsOn SPECT/CT, high signal intensity of the articular surface which shows biological activity and mean increase of mechanical loading was compared with that of the tibiofemoral shaft as a comparative signal. The proportion of positive signals was evaluated in all compartments of the operated knee. Analysis was performed according to combined injury.ResultsA relatively high proportion of positive signals was detected in the posterior zone of the lateral tibial plateau (23.5%) and trochlear groove (23.5%) although increased signal intensity was detected in all compartments. There was no statistical difference depending on the presence of combined injury and between single-bundle and double-bundle ACL reconstruction.ConclusionsFollowing anatomic ACL reconstruction, higher signal intensity was detected, particularly in the posterior part of the lateral tibial plateau and trochlear groove. Close observation for further signal changes or osteoarthritic changes would be required even if there was no combined injury and anatomic reconstruction was performed.
Highlights
There was no statistical difference in the postoperative period of SPECT/CT follow-up and mean age between the anatomic SB anterior cruciate ligament (ACL) recon struction group and the anatomic DB ACL reconstruction group
The main results of this study were that (1) a relatively high proportion of the positive signals was detected in the posterior zone of the lateral tibial plateau (23.5%) and trochlear groove (23.5%), increased signal intensity was detected in all compartments, (2) there was no statistical difference in terms of the presence of combined injury and (3) there was no statistical difference between SB and DB ACL reconstruction
According to a meta-analysis by Ajuied et al.1), ACL injury predisposes the knees to osteoarthritis, while ACL reconstruction surgery can be helpful in reducing the risk of developing degen erative changes in a postoperative period of 10 years
Summary
An anterior cruciate ligament (ACL) injury could lead to ar thritic changes due to a cartilage injury, meniscal tear, and the secondary laxity of capsule and ligaments caused by repetitive. 38 Kim et al Mechanical Loading after Anatomic ACLR dral bone It could be caused by an abnormal loading pattern after non-anatomic ACL reconstruction[3,4,5,6])
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