Acta Veterinaria et Zootechnica Sinica ›› 2023, Vol. 54 ›› Issue (9): 3977-3984.doi: 10.11843/j.issn.0366-6964.2023.09.035

• CLINICAL VETERINARY MEDICINE • Previous Articles     Next Articles

Clinical Application of 3D-Printed Model for Surgical Planning and Treatment of Grade Ⅳ Medial Patellar Luxation and Cranial Cruciate Ligament Rupture in a Dog

ZHANG Bin1, ZHANG Han1, SHI Lei1, YUAN Zhankui1,2*   

  1. 1. China Agricultural University Veterinary Teaching Hospital, Beijing 100193, China;
    2. College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
  • Received:2022-11-08 Published:2023-09-22

Abstract: The aim of this study was to report the effect of surgery assisted by 3D printing technique in the treatment of a dog with grade Ⅳ medial patellar luxation and cranial cruciate ligament rupture. A Shiba Inu with grade Ⅳ medial patellar luxation and cranial cruciate ligament rupture is treated in two ways. First, the modified tibial plateau leveling osteotomy (TPLO) and trochlear wedge recession are used. Then, the femoral deformity is evaluated through CT scanning and 3D printing of the femoral model to assist in formulating the surgical plan and carrying out distal femoral lateral closing wedge osteotomy (DFO). The degree of lameness, patella position and imaging examination are used to determine the recovery of the dog. The results showed that patellar luxation recurred 8 weeks after the modified TPLO and trochlear wedge recession, indicating that this method can not completely correct the grade Ⅳ medial patellar luxation. With the help of 3D printing technique, the DFO surgical planning is formulated, lameness is significantly improved after treatment, and postoperative recovery is good. In the case of high-level patellar luxation with cranial cruciate ligament rupture, attention should be paid to whether there is femoral deformity; The use of 3D printing technology can assess bone morphology more accurately, assist in formulating femoral osteotomy plan, and improve the success rate of surgery.

Key words: medial patellar luxation, cranial cruciate ligament disease, modified tibial plateau leveling osteotomy, distal femoral lateral closing wedge osteotomy, 3D printing technology

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