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  • Title: Lag screw and cancellous bone graft fixation of transverse proximal sesamoid bone fractures in horses: 25 cases (1983-1989).
    Author: Henninger RW, Bramlage LR, Schneider RK, Gabel AA.
    Journal: J Am Vet Med Assoc; 1991 Sep 01; 199(5):606-12. PubMed ID: 1787121.
    Abstract:
    Case records of 25 horses with transverse fractures of the proximal sesamoid bone were reviewed to evaluate the success of treatment. All fractures were repaired by use of lag screw fixation and an autogenous cancellous bone graft because the fracture fragments were considered too large for surgical removal and reconstruction of the suspensory apparatus was necessary. Radiography was performed in all cases, and the fractures were classified into 3 types: (1) proximal midbody fractures, which included all fractures in the proximal aspect of the sesamoid bone that resulted in fragments involving greater than one third but less than one half of the total mass of the sesamoid bone; (2) midbody fractures that divided the bone into 2 equal portions; and (3) distal midbody fractures, which included transverse fractures in the distal aspect of the sesamoid bone that resulted in fragments involving greater than one third but less than one half of the total mass of the sesamoid bone. Of these cases, race records were obtained for 9 Standardbreds and 5 Thoroughbreds. Postoperative performance criteria evaluated were the ability to train and start 1 race, ability to maintain preinjury class of racing, earnings per start, and the number of starts following surgery. In Thoroughbreds, fractures occurred most commonly in the right forelimb; in Standardbreds, the left hind limb was most commonly involved. The midbody fracture was the most common type in both breeds, and the distribution of fracture location within the sesamoid bone was similar for both breeds.(ABSTRACT TRUNCATED AT 250 WORDS)
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