Effect of a Locking Triple Pelvic Osteotomy Plate on Screw Loosening in 26 Dogs

    Authors

    S. A. Rose; J. N. Peck; C. A. Tano; N. Uddin;J. J. de Haan

    Comments

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    Abbreviated Journal Title

    Vet. Surg.

    Keywords

    HIP-DYSPLASIA; FIXATION; COMPLICATIONS; Veterinary Sciences

    Abstract

    Objective: To evaluate the complication rate of the double (DPO) and triple pelvic osteotomy (TPO) procedure (unilateral and bilateral) with a locking purpose-specific plate. Study design: Retrospective case series Animals: Dogs (n = 26; 38 hips) Materials: Medical records (January 2007-January 2011) of dogs that had unilateral or bilateral DPO or TPO were evaluated. Signalment, age, body weight, estimated preoperative subluxation and reduction angles, lameness, and complications were evaluated. Follow-up radiographs were evaluated for implant loosening or failure, femoral head coverage (FCH), pelvic dimensions, and radiographic evidence of healing. Results: Screw loosening occurred in 1 of 266 (0.4%) screws placed and in 1 of 38 hips (2.6%). The rate of screw loosening was significantly lower than previously reported. Only 1 hip (2.6%) developed a major complication. Minor complications involving implants occurred in 2 hips (5.3%). Three to 5 locking screws were used per plate. There was a significant increase in FCH and Norberg angle (NA) compared with preoperative values. No clinically significant change in pelvic canal dimensions measured at 3 locations was identified. Conclusion: Locking 7-hole TPO plates with 3-5 locking screws resulted in a lower rate of major and minor implant associated complications than the reported complication rate for conventional 6-hole plates. En bloc pullout of the caudal aspect of the plate is an infrequent but repeatable complication associated with the locking TPO implant.

    Journal Title

    Veterinary Surgery

    Volume

    41

    Issue/Number

    1

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    156

    Last Page

    162

    WOS Identifier

    WOS:000303009500020

    ISSN

    0161-3499

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