Effect of surgical technique on radiographic fusion of the anconeus in the treatment of ununited anconeal process

R. A. Pettitt*, J. Tattersall, T. Gemmill, S. J. Butterworth, T. J. O'Neill, S. J. Langley-Hobbs, E. J. Comerford, J. F. Innes

*Corresponding author for this work

    Research output: Contribution to journalArticle (Academic Journal)peer-review

    5 Citations (Scopus)

    Abstract

    Objectives

    The aim of this study was to determine if internal fixation of the anconeus combined with a proximal ulnar osteotomy was more likely to result in fusion of the anconeus to the ulna compared with a proximal ulnar osteotomy alone.

    Methods

    A total of 12 orthopaedic referral clinics reviewed their clinical databases for cases of ununited anconeal process. Demographic and clinical parameters were collected along with radiographic follow-up at a minimum of four weeks. Cases treated with proximal ulnar osteotomy alone were compared with those treated with proximal ulnar osteotomy + internal fixation. Both groups were compared for background and disease variables. We tested for an association between treatment method and whether radiographic anconeal union had occurred.

    Results

    A total of 47 elbows (44 dogs) were identified. Of these, 28 cases (average age 7 center dot 6 months) were treated with proximal ulnar osteotomy (of which eight were stabilised with an intramedullary pin) alone. Nineteen cases (average age 7 center dot 1 months) were treated with proximal ulnar osteotomy + internal fixation. The two groups were not significantly different in age (P=0 center dot 638, Mann-Whitney U test). Fourteen of 28 cases with proximal ulnar osteotomy alone displayed anconeal union at follow-up compared with 16 of 19 cases of proximal ulnar osteotomy + internal fixation, and this difference was statistically significant (P=0 center dot 029, Fisher's exact test).

    Clinical Significance

    These data suggest that use of a lag screw to stabilise and compress the ununited anconeal process in addition to proximal ulnar osteotomy produces a better radiographic outcome. It is argued that radiographic union of the anconeus is likely to be associated with better long-term clinical outcome but further studies are required to confirm this.

    Original languageEnglish
    Pages (from-to)545-548
    Number of pages4
    JournalJournal of Small Animal Practice
    Volume50
    Issue number10
    DOIs
    Publication statusPublished - Oct 2009

    Keywords

    • DEVELOPMENTAL ELBOW DISEASES
    • PROXIMAL ULNAR OSTEOTOMY
    • LAG-SCREW FIXATION
    • CANINE ELBOW
    • DOG
    • PATHOGENESIS
    • INCONGRUITY
    • DYSPLASIA
    • JOINT

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