Peer-reviewed veterinary case report
Revision surgery with Ridgestop and 3D guides for severe dog knee
By Sung, Chaewon et al.·Published in Acta veterinaria Hungarica·2026·College of Veterinary Medicine, South Korea·View original on PubMed →
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Original publication title: Revision surgery with Ridgestop and 3D-printed guides for grade IV canine medial patellar luxation.
- Species:
- dog
Plain-English summary
A 4-year-old bichon frise was brought in for ongoing limping after previous surgery for a knee problem called medial patellar luxation (MPL), where the kneecap slips out of place. After examining her and using advanced imaging, the vet found that her leg bones were misaligned, contributing to the issue. She underwent a revision surgery that included realigning the bones and placing a device called Ridgestop to help keep the kneecap in its proper position. After the surgery, she was able to walk without any further issues, and follow-up X-rays showed her legs were properly aligned.
People also search for: bichon frise limping after knee surgery · dog patellar luxation treatment · Ridgestop for dogs knee problems
Abstract
A 4-year-old, 3.9 kg spayed female bichon frise presented with persistent lameness following primary medial patellar luxation (MPL) surgery, including tibial tuberosity transposition, trochleoplasty and lateral imbrication. The physical examination indicated a grade IV MPL. Preoperative CT-based 3D reconstructions revealed varus deformity of the distal femur, valgus deformity of the proximal tibia, internal rotation of the tibial tuberosity and bilateral moderate degenerative changes of the coxofemoral joints, with concurrent grade IV medial patellar luxation. The patient underwent revision surgery with distal femoral osteotomy (DFO), proximal tibial osteotomy (PTO) and Ridgestop placement to augment the medial trochlear ridge. To ensure precise intraoperative alignment, preoperative planning utilised virtual 3D planning and 3D printing to fabricate customised osteotomy surgical guides for both DFO and PTO. Postoperative follow-up revealed no further luxation, with stable weight-bearing ambulation. Radiographic analysis confirmed proper limb alignment and Ridgestop implant placement. Ridgestop could offer an effective treatment option for dogs with recurrent patellar luxation when combined with corrective osteotomy.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/41824005/