In Vitro Comparison of Tibial Plateau Leveling Osteotomy with and Without Use of a Tibial Plateau Leveling Jig

Authors

  • KAY INGO SCHMERBACH Dr Med Vet,

    1. Department of Small Animal Medicine, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany; Tierklinik Dr. Reif, Böbingen, Germany; and AddStat Statistics, Leipzig, Germany.
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  • CHRISTIAN KONRAD MATTHIAS BOELTZIG Med Vet,

    1. Department of Small Animal Medicine, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany; Tierklinik Dr. Reif, Böbingen, Germany; and AddStat Statistics, Leipzig, Germany.
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  • ULLRICH REIF DVM, Diplomate ACVS & ECVS,

    1. Department of Small Animal Medicine, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany; Tierklinik Dr. Reif, Böbingen, Germany; and AddStat Statistics, Leipzig, Germany.
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  • JAN CARSTEN WIESER Med Vet,

    1. Department of Small Animal Medicine, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany; Tierklinik Dr. Reif, Böbingen, Germany; and AddStat Statistics, Leipzig, Germany.
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  • THOMAS KELLER Dr Rer Nat,

    1. Department of Small Animal Medicine, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany; Tierklinik Dr. Reif, Böbingen, Germany; and AddStat Statistics, Leipzig, Germany.
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  • VERA GREVEL Dr Med Vet, Diplomate ECVS

    1. Department of Small Animal Medicine, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany; Tierklinik Dr. Reif, Böbingen, Germany; and AddStat Statistics, Leipzig, Germany.
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  • Study performed at the University of Leipzig.

  • Presented at the Resident Forum, 15th Annual Scientific Meeting of the European College of Veterinary Surgeons. Seville, Spain, June 29–July 1, 2006.

Address reprint requests to Dr. Kay Schmerbach, Department of Small Animal Medicine, Faculty of Veterinary Medicine, University of Leipzig, An den Tierkliniken Leipzig, 23 04103, Germany. E-mail: schmerbach@kleintierklinik.uni-leipzig.de

Abstract

Objective— To evaluate the influence of a tibial plateau leveling jig on osteotomy orientation, fragment reduction, and postoperative tibial plateau angle (TPA) during tibial plateau leveling osteotomy (TPLO).

Study Design— In vitro experimental study.

Animals— Large-breed canine cadavers (n=20).

Methods— TPLO was performed on 40 hindlimbs using 4 methods. Group 1: Jig; dogs in dorsal recumbency with the osteotomy parallel to the distal jig pin. Groups 2–4: No jig; dogs in lateral recumbency with the osteotomy in a vertical orientation (group 2: tibia parallel to the table top; group 3: controlled superimposition of the femoral condyles; group 4: internal rotation of the tibia). Postoperative TPA, fragment reduction, and osteotomy orientation relative to the tibial plateau were compared. Positive or negative values denoted deviation from parallel relative to the tibial plateau.

Results— Postoperative TPA, fragment reduction, and proximodistal osteotomy orientation were not significantly different between groups. Craniocaudal osteotomy orientation was significantly different (P<.005) from the tibial plateau. Median deviations were −4.0° (group 1), 11.8° (group 2), 11.2° (group 3), and 0.2° (group 4). Group 1 was not significantly different from group 4.

Conclusions— A jig is not essential for osteotomy orientation, tibial plateau rotation, or fragment reduction. Comparable results were achieved performing a vertical osteotomy with the tibia slightly internally rotated (10°–15°) and parallel to the table surface.

Clinical Relevance— TPLO without use of a jig reduces surgical trauma, is less time consuming, and reduces cost.

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