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Inferior fixation with a new pin design for external fixation: A randomized study in 50 patients operated on by the hemicallotasis technique.

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Author

Summary, in English

Background and purpose Tibial osteotomy by the hemicallotasis technique (HCO) requires strong pin fixation. We compared pin fixation in HCO using a new self-drilling XCaliber pin (Orthofix) with optimized thread and tip design, with the commonly used standard pin (Orthofix). Patients and methods 50 patients, mean age 51 (35-66) years, to be treated by HCO were randomized to standard pins or XCaliber pins. In the metaphyseal bone, hydroxyapatite-coated (HA-coated) pins were used in both types of pins. In the diaphyseal bone, non-coated pins were used. The torque forces for insertion and extraction (in Nm) were measured. Results The insertion torque was higher for both the proximal and distal standard pins (2.1 Nm (SD 0.9) and 7.0 Nm (1.3), respectively) than for the XCaliber pins (1.3 Nm (0.8) and 3.6 Nm (1.4)). The extraction torque force was higher for the proximal standard pins (4.3 Nm (3.1)) than for the proximal XCaliber pins (1.5 Nm (1.7)) (p < 0.001). The extraction torque for the distal standard pins was 1.9 Nm (2.0) and for the distal XCaliber pins it was 1.4 Nm (1.1). Interpretation The commonly used standard pin gives stronger fixation during the treatment of HCO.

Publishing year

2008

Language

English

Pages

48-52

Publication/Series

Acta Orthopaedica

Volume

79

Issue

1

Document type

Journal article

Publisher

Taylor & Francis

Topic

  • Orthopedics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1745-3682