Three-dimensional assessment of the influence of juvenile pubic symphysiodesis on the pelvic geometry of dogs

Anna E. Dunlap, Kyle G. Mathews, Bethany L. Walters, Kent A. Bruner, Hongyu Ru, Denis J Marcellin-Little

Research output: Contribution to journalArticle

Abstract

OBJECTIVE To evaluate the 3-D geometry of canine pelves and to characterize the long-term effects of juvenile pubic symphysiodesis (JPS) on pelvic geometry by comparing the pelvic configuration between littermates that did and did not undergo the procedure. ANIMALS 24 Labrador Retriever, Golden Retriever, or Labrador Retriever–Golden Retriever crossbred service dogs from 13 litters. PROCEDURES At 16 weeks old, puppies with a hip joint distraction index ≥ 0.5 were randomly assigned to undergo thermal JPS (n = 9), mechanical JPS (7), or a sham (control) surgical procedure (8). Ten years later, each dog underwent a CT scan of the pelvic region. Modeling software was used to create 3-D reconstructions from the CT scans, and various pelvic measurements were made and compared among the 3 treatments. RESULTS Compared with the control treatment, thermal and mechanical JPS increased the hemipelvis acetabular angle by 4°, the acetabular angle of lateral opening by 5°, and the orientation of the medial acetabular wall in a transverse plane by 6°, which indicated that JPS increased dorsal femoral head coverage by the acetabulum. Both JPS procedures decreased the pelvic canal area by approximately 20% and acetabular inclination by 6° but did not alter acetabular retroversion. CONCLUSIONS AND CLINICAL RELEVANCE Results indicated that thermal and mechanical JPS were equally effective in altering the 3-D pelvic geometry of dogs. These findings may help guide future studies of alternatives for optimizing canine pelvic anatomy to minimize the risk of hip dysplasia and associated osteoarthritis.

Original languageEnglish (US)
Pages (from-to)1217-1225
Number of pages9
JournalAmerican Journal of Veterinary Research
Volume79
Issue number11
DOIs
StatePublished - Nov 1 2018

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Newfoundland and Labrador
Hot Temperature
Dogs
Pelvis
Canidae
dogs
Acetabulum
Hip Dislocation
Hip Joint
Labrador Retriever
Thigh
Osteoarthritis
computed tomography
Anatomy
Software
service dogs
heat
hip dysplasia
Golden Retriever
pelvis

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Three-dimensional assessment of the influence of juvenile pubic symphysiodesis on the pelvic geometry of dogs. / Dunlap, Anna E.; Mathews, Kyle G.; Walters, Bethany L.; Bruner, Kent A.; Ru, Hongyu; Marcellin-Little, Denis J.

In: American Journal of Veterinary Research, Vol. 79, No. 11, 01.11.2018, p. 1217-1225.

Research output: Contribution to journalArticle

Dunlap, Anna E. ; Mathews, Kyle G. ; Walters, Bethany L. ; Bruner, Kent A. ; Ru, Hongyu ; Marcellin-Little, Denis J. / Three-dimensional assessment of the influence of juvenile pubic symphysiodesis on the pelvic geometry of dogs. In: American Journal of Veterinary Research. 2018 ; Vol. 79, No. 11. pp. 1217-1225.
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