Page 551 - Adams and Stashak's Lameness in Horses, 7th Edition

Lameness of the Distal Limb 517

the amount of in‐hand exercise is increased, dependent excessive bony proliferation that impinges on the DIP
on horse temperament and available facilities. Although joint, exostosis of the extensor process of the distal pha-
VetBooks.ir 6 months, up to a year of convalescence may be required implants (screws protruding from the palmar/plantar
lanx, and soft tissue “irritation” associated with the
some horses may be ready to return to performance by
aspect of P1 and P2).
for others. The implants do not typically need to be
removed.
OSTEOCHONDROSIS (OC) OF THE PIP JOINT
Prognosis OC of the PIP joint is identified less commonly than

After arthrodesis of the PIP joint, approximately other joints in the horse. However, both osteochondral
89%–95% of horses with hindlimb and 70%–85% of fragmentation and SCLs can be seen in the PIP
horses with forelimb lameness should return to their joint. 19,20,52,60,70,71 Osteochondral fragments tend to occur
intended use, and 85% will return to athletic sound- dorsally (usually from the distal aspect of P1) or pal-
ness. 31,37,41,59 Complications that may prevent horses marly/plantarly (midline from the eminences of P2;
from becoming athletically sound include implant infection, Figure 4.93). SCLs due to OC are usually seen on the

Figure 4.92. Lateral radiograph of the pastern following placement of a 3‐hole LCP with two transarticular 5.5‐mm screws for
arthrodesis of the PIP joint.

A B

Figure 4.93. Dorsopalmar (A) and lateral (B) radiographs of a horse with palmar fragmentation of the PIP joint (arrow). The fragment was
removed with arthroscopy.