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Analysis of a laxity index database and comparison with the fédération cynologique internationale grades of this population

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Abstract
Objective This study aimed to analyse the distribution of the laxity indices (LI) in a dog population, to compare the LI with the Federation Cynologique Internationale (FCI) grades and to search for differences of LI between breeds. Study Design The database was composed of all dogs presented to the University Hospital of the Faculty of Veterinary Medicine in Ghent for obligatory hip screening between January 2016 and February 2019, and all patients presented to orthopaedic consultation between January 2017 and January 2019 for a complaint of hindlimb lameness, which underwent both a standard extended ventrodorsal radiograph of the hips and a stress radiograph revealing hip joint laxity. The latter was obtained by means of the Vezzoni-modified Badertscher distension device and the LI was calculated. For each dog of the population, the LI was then compared with the FCI grade. Results The LI values ranged between 0.15 and 1.04, with a mean of 0.46. The LI and the FCI grade increased together, and showed a moderate-to-good correlation. There was a highly significant overall difference in the mean value of LI per FCI grade group ( p <0.001). The mean LI of the Labrador Retrievers was slightly but significantly lower than the mean LI of the Golden Retrievers ( p <0.01). Conclusion The LI calculated on a stress radiograph taken with the Vezzoni-modified Badertscher distension device shows a good correlation with the FCI grade assigned on a standard extended ventrodorsal projection. A wide range of passive hip joint laxity exists in dogs considered to be phenotypically normal based on the FCI grading method.
Keywords
Animal Science and Zoology, General Veterinary, hip, laxity, database, stress, radiograph, CANINE HIP-DYSPLASIA, DEGENERATIVE JOINT DISEASE, DISTRACTION INDEX, RISK-FACTORS, RADIOGRAPHS, DOGS, DIAGNOSIS, VALUES

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MLA
Bertal, Miléva, et al. “Analysis of a Laxity Index Database and Comparison with the Fédération Cynologique Internationale Grades of This Population.” VETERINARY AND COMPARATIVE ORTHOPAEDICS AND TRAUMATOLOGY, vol. 34, no. 02, 2021, pp. 108–14, doi:10.1055/s-0040-1719062.
APA
Bertal, M., Vezzoni, A., Van der Vekens, E., Polis, I., Saunders, J., & Broeckx, B. (2021). Analysis of a laxity index database and comparison with the fédération cynologique internationale grades of this population. VETERINARY AND COMPARATIVE ORTHOPAEDICS AND TRAUMATOLOGY, 34(02), 108–114. https://doi.org/10.1055/s-0040-1719062
Chicago author-date
Bertal, Miléva, Aldo Vezzoni, Elke Van der Vekens, Ingeborgh Polis, Jimmy Saunders, and Bart Broeckx. 2021. “Analysis of a Laxity Index Database and Comparison with the Fédération Cynologique Internationale Grades of This Population.” VETERINARY AND COMPARATIVE ORTHOPAEDICS AND TRAUMATOLOGY 34 (02): 108–14. https://doi.org/10.1055/s-0040-1719062.
Chicago author-date (all authors)
Bertal, Miléva, Aldo Vezzoni, Elke Van der Vekens, Ingeborgh Polis, Jimmy Saunders, and Bart Broeckx. 2021. “Analysis of a Laxity Index Database and Comparison with the Fédération Cynologique Internationale Grades of This Population.” VETERINARY AND COMPARATIVE ORTHOPAEDICS AND TRAUMATOLOGY 34 (02): 108–114. doi:10.1055/s-0040-1719062.
Vancouver
1.
Bertal M, Vezzoni A, Van der Vekens E, Polis I, Saunders J, Broeckx B. Analysis of a laxity index database and comparison with the fédération cynologique internationale grades of this population. VETERINARY AND COMPARATIVE ORTHOPAEDICS AND TRAUMATOLOGY. 2021;34(02):108–14.
IEEE
[1]
M. Bertal, A. Vezzoni, E. Van der Vekens, I. Polis, J. Saunders, and B. Broeckx, “Analysis of a laxity index database and comparison with the fédération cynologique internationale grades of this population,” VETERINARY AND COMPARATIVE ORTHOPAEDICS AND TRAUMATOLOGY, vol. 34, no. 02, pp. 108–114, 2021.
@article{8683204,
  abstract     = {{Objective This study aimed to analyse the distribution of the laxity indices (LI) in a dog population, to compare the LI with the Federation Cynologique Internationale (FCI) grades and to search for differences of LI between breeds.

Study Design The database was composed of all dogs presented to the University Hospital of the Faculty of Veterinary Medicine in Ghent for obligatory hip screening between January 2016 and February 2019, and all patients presented to orthopaedic consultation between January 2017 and January 2019 for a complaint of hindlimb lameness, which underwent both a standard extended ventrodorsal radiograph of the hips and a stress radiograph revealing hip joint laxity. The latter was obtained by means of the Vezzoni-modified Badertscher distension device and the LI was calculated. For each dog of the population, the LI was then compared with the FCI grade.

Results The LI values ranged between 0.15 and 1.04, with a mean of 0.46. The LI and the FCI grade increased together, and showed a moderate-to-good correlation. There was a highly significant overall difference in the mean value of LI per FCI grade group ( p <0.001). The mean LI of the Labrador Retrievers was slightly but significantly lower than the mean LI of the Golden Retrievers ( p <0.01).

Conclusion The LI calculated on a stress radiograph taken with the Vezzoni-modified Badertscher distension device shows a good correlation with the FCI grade assigned on a standard extended ventrodorsal projection. A wide range of passive hip joint laxity exists in dogs considered to be phenotypically normal based on the FCI grading method.}},
  author       = {{Bertal, Miléva and Vezzoni, Aldo and Van der Vekens, Elke and Polis, Ingeborgh and Saunders, Jimmy and Broeckx, Bart}},
  issn         = {{0932-0814}},
  journal      = {{VETERINARY AND COMPARATIVE ORTHOPAEDICS AND TRAUMATOLOGY}},
  keywords     = {{Animal Science and Zoology,General Veterinary,hip,laxity,database,stress,radiograph,CANINE HIP-DYSPLASIA,DEGENERATIVE JOINT DISEASE,DISTRACTION INDEX,RISK-FACTORS,RADIOGRAPHS,DOGS,DIAGNOSIS,VALUES}},
  language     = {{eng}},
  number       = {{02}},
  pages        = {{108--114}},
  title        = {{Analysis of a laxity index database and comparison with the fédération cynologique internationale grades of this population}},
  url          = {{http://dx.doi.org/10.1055/s-0040-1719062}},
  volume       = {{34}},
  year         = {{2021}},
}

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