Partial closure of the distal femoral epiphyseal plate and a secondary varus deformity occurred consistently in twelve-week-old puppies after partial resection of the medial femoral condyle. After production of closure in the manner described, the resultant osseous bridges in sixty-four limbs were then resected and the cut surfaces (bone and growth plate) were covered with either silicone adhesive, isobutyl cyanoacrylate, or Silastic No. 382. With observation periods of up to twelve weeks, only the silicone-rubber implants consistently prevented osseous-bridge reformation and therefore prevented further angular deformities. It was essential that the silicone implant remain in direct contact with the entire plate during the period of observation.