In vivo bone tunnel remodeling in symptomatic patients after ACL reconstruction: a retrospective comparison of articular and extra-articular fixation

Dominic, T Mathis

doi:10.11138/mltj/2015.5.4.316

Cited by 8 publications

(2 citation statements)

References 25 publications

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“…Another imaging modality, SPECT/CT (Single-photon emission computed tomography/computed tomography), has previously been used with diphosphonate bone tracers to evaluate changes in biomechanical loading and the subchondral bone plate [12]. Higher amounts of this bone tracer uptake has been shown to be significantly related to a higher degree of osteoarthritis in knees post-ACL reconstruction [14]. While this imaging modality serves to measure additional parameters (in vivo joint loading, bone tunnel remodeling and graft incorporation), interpretation is required to differentiate between an inflammatory response versus altered in vivo loading or both [13].…”

Section: Introductionmentioning

confidence: 99%

PET/MRI reveals ongoing metabolic activity in ACL grafts one year post-ACL reconstruction

Korbin¹,

Salerno²,

Achonu³

et al. 2020

J EXP ORTOP

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Purpose: To use serial PET/MRI imaging to radiographically evaluate the metabolic activity of the ACL graft over the first post-operative year. Methods: Six patients undergoing primary ACL reconstruction were recruited in this prospective study in an inpatient university hospital. All patients underwent femoral and tibial suspensory cortical fixation with quadrupled semitendinosus autograft hamstring ACL reconstruction by an orthopaedic surgeon. Simultaneous 18 F-FDG PET and MRI of both the operative and non-operative knee was performed at three, six, and 12 months post-operatively. Quantification of the mean standardized uptake value (SUV) within the whole-knee, as well as tibial tunnel, femoral tunnel, and intra-articular graft regions of interest (ROIs). Results: PET whole-knee activity was increased at all time-points post-operatively compared to the control, nonoperative knee. Activity decreased over time, yet considerable generalized activity remained 1 year post-operatively, with relative intensity 34% percent higher than control. When the operative knee was divided into three wholeregions, there was greater activity in the tibia at three than 12 months, the femur at six than 12 months, and in the tibia compared to the intra-articular region at 3 months. When they were separated into sub-regions, results demonstrated greater activity closer to the joint surface. Conclusions: PET/MRI evaluation of ACL graft reconstructions demonstrates evolving biologic activity within the graft and both tunnels. Focal areas of increased activity within the tunnels may indicate of ligamento-osseous morphologic changes. These data suggest that graft incorporation continues well beyond 1 year post-operatively. Level of evidence: Level IV.

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Section: Introductionmentioning

confidence: 99%

PET/MRI reveals ongoing metabolic activity in ACL grafts one year post-ACL reconstruction

Korbin¹,

Salerno²,

Achonu³

et al. 2020

J EXP ORTOP

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show abstract

“…However, little is known about how the graft evolves in terms of hypertrophy, hypotrophy, elongation or shortening in the immediate post-operative period. It is known that graft embodiment and the early stages of ligamentization process start immediately after ACL reconstruction, and ends after one to three years after surgical procedure, but the exact sequence of the ligamentization process is still poorly understood (7,19,21). The purpose of this study was to measure the diameter of quadruple hamstring autograft with an MRI, before it undergoes any of the ligamentization process, and compare with the intra-operative graft measure.…”

Section: Introductionmentioning

confidence: 99%

Short term evaluation of the hamstring graft diameter after ACL reconstruction

Astur

Pires²,

Parente³

et al. 2019

Muscle Ligaments and Tendons J

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Background. Graft embodiment process that occurs in the twelve weeks following reconstruction surgery is well described. However, the short-term performance characteristics of graphs, in terms of graft size and diameter, used in anterior cruciate ligament reconstructions is currently unknown. The purpose of this study was to measure the diameter of quadruple hamstring autograft with an MRI at two weeks post-op, before it undergoes any of the ligamentization process, and to compare it with the intra-operative graft measure. Material and methods. A prospective, observational study design was used. The MRI measured hamstring graft diameter at two weeks post-op from 38 study participants was compared to intraoperative diameter measurement of hamstrings graft during the ACL reconstruction surgery. Coronal plane T2 imaging was used to capture images in the intercondylar region near the tibial tunnel. Results. The average of the intra-operative graft diameter measurements was 7.9 mm (SD: 0.7 mm; range: 6.5 -9 mm). The average post-operative measurement obtained via MRI imaging within two weeks post-op was 7.1 mm (SD: 0.8 mm; range: 5.1 -8.6 mm). There was a significant decrease in the diameters of the graft over the first two weeks postoperatively (p < 0.001). Conclusions. The diameters of quadruple hamstrings knee grafts used for reconstructions of the anterior cruciate ligament decreased by 9.68% on average between the moment of the surgery and two weeks after surgery. This information can be used to guide graft preparation, reconstruction planning, rehabilitation and post-operative counseling of the patient as to their risk of rupture.

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Increased bone tracer uptake in symptomatic patients with ACL graft insufficiency: a correlation of MRI and SPECT/CT findings

Mathis

Hirschmann

Falkowski

et al. 2017

Knee Surg Sports Traumatol Arthrosc

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In vivo bone tunnel remodeling in symptomatic patients after ACL reconstruction: a retrospective comparison of articular and extra-articular fixation

Cited by 8 publications

References 25 publications

PET/MRI reveals ongoing metabolic activity in ACL grafts one year post-ACL reconstruction

PET/MRI reveals ongoing metabolic activity in ACL grafts one year post-ACL reconstruction

Short term evaluation of the hamstring graft diameter after ACL reconstruction

Increased bone tracer uptake in symptomatic patients with ACL graft insufficiency: a correlation of MRI and SPECT/CT findings

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