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  • Title: Osseous metaplasia as a cause of loss of extension after anterior cruciate ligament reconstruction.
    Author: Taggart TF, Kumar A, Suvarna SK, Bickerstaff DR.
    Journal: Arthroscopy; 2001 Apr; 17(4):405-7. PubMed ID: 11288014.
    Abstract:
    We report a case of osseous metaplasia of an autologous anterior cruciate ligament (ACL) reconstruction that was implicated in blocking extension of the knee. Nonoperative treatment was unsuccessful. Arthroscopic excision of the ACL and osseous metaplasia abolished the fixed flexion deformity. The osseous metaplasia was an additional factor in causing the block to extension along with an anteriorly placed femoral tunnel, raising the question that nonisometry of the graft may be involved in the pathogenesis of the osseous metaplasia.
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