ISSN 2398-2977      

Navicular bone: suspensory desmotomy

pequis

Introduction

  • A change in the biomechanics of the navicular suspensory apparatus may relieve pain associated with navicular disease   Navicular bone: syndrome  .
  • Surgery is proposed based on mechanically-based etiology and involves sectioning the collateral sesamoidean ligaments (CSL):
    • These ligaments contain a large number of nerve fibers and surgery may be a form of neurectomy.
    • Exact biomechanical role of the CSLs is unknown.
  • Surgery is proposed to decrease forces on the navicular bone during the caudal phase of the stride.

Uses

  • Unresponsive navicular disease   Navicular bone: syndrome  :
    • Cases in which the disease was present for >1 year showed a decreased response to surgery.
    • Surgery should be attempted early in disease course if being used.

Disadvantages

  • Surgical procedure - requires general anesthesia   Anesthesia: general - overview  .
  • Potential disruption of the collateral ligaments of the pastern   →   instability.
  • Uncertain results.

Requirements

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Preparation

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Procedure

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Aftercare

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Outcomes

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Prognosis

  • Fair - literature suggests 70% of operated horses return to work without lameness; current results are probably slightly less.

Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Wright I M (1993) A study of 118 cases of navicular disease: treatment by navicular suspensory desmotomy. Equine Vet J 25, 501-509. Erratum in:Equine Vet J 1994 26, 77 PubMed.
  • Wright I M  (1986) Navicular suspensory desmotomy in the treatment of navicular disease: technique and preliminary results. Equine Vet J 18, 443-446 PubMed.

Other sources of information

  • Furst A E & Lischer C J (2006) The Foot. In: Equine Surgery. Eds: Auer & Stick. Saunders Elseveir, USA. pp 1210-1212.

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