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Stability of the Offset V-Osteotomy

Test Jig Development and Saw Bone Model Assessment

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  • 1 Private practice, Wytheville, VA.
  • | 2 Associate Professor, Department of Surgery, Temple University School of Podiatric Medicine, Philadelphia, PA.
  • | 3 Associate Professor, Director of the Gait Study Center, Department of Orthopedics, Community Health and Aging, Temple University School of Podiatric Medicine. Mailing address: Eighth at Race St, Philadelphia, PA 19107.
  • | 4 Assistant Professor, Research Director of the Advanced Wound Healing Center, Department of Orthopedics and Medicine, Temple University School of Podiatric Medicine, Philadelphia, PA.
  • | 5 Submitted during fourth-year residency, Temple University Hospital, Philadelphia, PA.
  • | 6 Private practice, Catskill, NY.
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In the offset V-bunionectomy used for hallux valgus repair, both the Kalish and the Vogler variations have a long dorsal arm, but the apex is more distal in the Kalish procedure. This study investigated the effect that pin orientation and location of the osteotomy apex have on weightbearing stability. The authors studied saw bone models that were loaded to failure in an Instron 4201 materials testing machine and, in addition, designed, fabricated, and used a unique jig assembly to help minimize data variability. Statistically significant differences were found between the surgical techniques and pin orientations: the Kalish osteotomy was stronger than the Vogler procedure, and in both osteotomies, the plantarly directed Kirschner wire orientation was stronger than the dorsally directed orientation. (J Am Podiatr Med Assoc 92(2): 82-89, 2002)