Bone mineral density in the proximal tibia and XXXX before and after arthroscopic reconstruction of the anterior cruciate ligament.

@entity1 @entity79 @entity8546
PURPOSE: To monitor changes in @entity79 ( @entity79 ) of the proximal tibia and the @entity8546 in @entity1 with anterior cruciate ligament (ACL) rupture before and after arthroscopic reconstruction of the ligament, related to clinical data. TYPE OF STUDY: A 2-year prospective cohort study with assessment of @entity1 evaluation of knee performance, clinical scoring of surgical results, and measurement of @entity79 in the tibia and @entity8546 . METHODS: Eighteen @entity1 with a unilateral ACL rupture underwent an autogenous bone-patellar tendon-bone graft ACL reconstruction. The @entity1 were examined before surgery and after 4, 12, and 24 months. @entity79 was assessed bilaterally in the proximal tibia and @entity8546 using dual-photon absorptiometry and converted to a Z-score by use of @entity79 values from a group of healthy controls. Clinical evaluation included determination of Lysholm score, quantitative Lachman test, pivot-shift test, and the @entity1 ' self-reported highest level of activity and knee performance in sports and daily activities. RESULTS: There were significant declines in Z-score of the proximal tibia of the operated leg during the first year after surgery, whereas there was no change in the @entity8546 and contralateral leg. In the lateral tibia, the Z-score was significantly lower at 24 months follow-up, compared with both controls and the noninjured side, whereas @entity79 of the medial tibia had returned to near normal levels. There were significant improvements in Lysholm score, highest level of activity, and knee performance in daily activities and sports. The @entity1 ' evaluation of improvement in knee performance in sports activities at 24 months follow-up was associated with an increase in Z-score of the injured leg. CONCLUSIONS: We found a partially reversible decline in @entity79 of the proximal tibia after arthroscopic ACL reconstruction. Improvement in knee performance in sports activities was associated with an increase in @entity79 of the injured leg. @entity79 of the @entity8546 remained unaffected in both legs. LEVEL OF EVIDENCE: Level III, therapeutic case control study.
