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Patella Groove Replacement (PGR) in a Staffordshire Bull Terrier
Patella Groove Replacement
Stifle Stifle Cranio Caudal 07 03 2017 17 51 49 803
Kyon Implant

Patella Groove Replacement (PGR) is a partial joint replacement surgery where the trochlear groove of the stifle is replaced with a prosthesis. It is indicated as a treatment for chronic patello-femoral pain due to degenerative joint disease, and can also be used as a treatment for patella luxation (Dokic)

Case description:

This 15 month old Staffordshire Bull Terrier suffered an avulsion fracture of the tibial tuberosity as a puppy. The fracture was repaired with a pin and tension band, but unfortunately resulted in medial patella luxation and a deformed tibial tuberosity that was reduced in size compared to the contralateral limb. A tibial crest transposition was considered as treatment but preoperative radiographs suggested that the maximum depth that could be obtained following osteotomy was 6mm. Pin tract holes from the previous surgery were also present, and in this very boisterous and enthusiastic pup, the risk of postoperative tuberosity fracture was considered unacceptably high.

The stifle was approached via a standard lateral arthrotomy and the sulcus removed with an oscillating saw. A dummy of the intended implant size was then positioned on the osteotomy surface to define the correct position for the implant. The base plate was attached, the groove itself applied to the plate and the patella reduced.

After 6 weeks of postoperative restriction there was good boney ingrowth into the base plate, the patella was tracking well and the dog made a full recovery and was able to return to full activity.

Keith Holton BVScJoint Venture Partner - Vets4Pets Yate.
“We have found Rata an invaluable resource in our blossoming practice - the surgeons are very popular with our clients who like keeping their pets in familiar, friendly and convenient environment.”