Journal of Veterinary Clinics (한국임상수의학회지)

The Korean Society of Veterinary Clinics (한국임상수의학회)
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Biomechanical Comparison of Soft Tissue Reconstructions in the Treatment of Medial Patellar Luxation in Dogs

  • Kim, Sang-Yeoun (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Moon, Hee-Sup (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Park, Sung-Guon (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Hong, Sung-Jin (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Choi, Hee-Bok (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Hwang, Tae-Sung (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Lee, Hee-Chun (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Hwang, Yong-Hyun (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University) ;
  • Lee, Jae-Hoon (Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University)
  • Received : 2017.10.28
  • Accepted : 2017.12.13
  • Published : 2017.12.31
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Abstract

The present study aimed to document the biomechanical findings of soft tissue reconstruction surgeries for the treatment of medial patellar luxation in dogs. Stifle joints (n = 12) from dogs weighing 4.1-8.4 kg were used in this study. The following soft tissue reconstruction techniques used for the treatment of medial patellar luxation were selected for this study: vastus medialis release, medial retinacular release, and capsule release for medial realignment (n = 6), and retinacular imbrication and anti-rotational suture for lateral realignment (n = 6). A 5-kg traction using an electronic scale was applied at $45^{\circ}C$ laterally for medial realignment and medially for lateral realignment. Fluoroscopic imaging was used to measure the length of patellar displacement (LPD) in each technique. Among medial realignment techniques, capsule release had the highest horizontal LPD; vastus medialis release had significantly higher horizontal LPD than medial retinacular release. Vastus medialis release had the smallest increase statistically in vertical LPD, and vertical LPD did not differ significantly between medial retinacular and capsule release. Among lateral realignment techniques, the horizontal LPD was significantly higher in anti-rotational suture with retinacular imbrication than in retinacular imbrication alone, but the vertical LPD did not differ significantly between the two groups. Our findings indicated that vastus medialis release could decrease the medial tension on the patella without inducing patellar instability in dogs. Both medial retinacular and capsule release could increase patellar instability; moreover, medial retinacular release does not decrease the medial tension on the patella. Antirotational suture with retinacular imbrication provides more lateral tension than retinacular imbrication alone.

Keywords

References

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  1. Surgical Correction of Medial Patellar Luxation including Release of Vastus Medialis without Trochleoplasty in Small Breed Dogs: A Retrospective Review of 22 Cases vol.35, pp.3, 2018, https://doi.org/10.17555/jvc.2018.06.35.3.71