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Vet Comp Orthop Traumatol 2020; 33(03): 167-173
DOI: 10.1055/s-0039-3401811
Original Research
Georg Thieme Verlag KG Stuttgart · New York

Average Tibial Plateau Angle of 3,922 Stifles Undergoing Surgical Stabilization for Cranial Cruciate Ligament Rupture

Elisabeth A. Fox
1   Veterinary Orthopedic and Sports Medicine Group, Annapolis Junction, Maryland, United States
,
David L. Dycus
1   Veterinary Orthopedic and Sports Medicine Group, Annapolis Junction, Maryland, United States
,
Christopher S. Leasure
1   Veterinary Orthopedic and Sports Medicine Group, Annapolis Junction, Maryland, United States
,
Herbert A. Fox
1   Veterinary Orthopedic and Sports Medicine Group, Annapolis Junction, Maryland, United States
,
Sherman O. Canapp Jr.
1   Veterinary Orthopedic and Sports Medicine Group, Annapolis Junction, Maryland, United States
› Author Affiliations
Further Information

Publication History

27 November 2018

30 October 2019

Publication Date:
24 January 2020 (online)

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Abstract

Objective The aim of this study was to report the average tibial plateau angle (TPA) from a large sample of dogs and to determine if breed or gonadectomy had a significant association with abnormal TPA.

Study Design This was a retrospective case study.

Materials and Methods Medical records from 2006 to 2015 were reviewed for dogs that were diagnosed with cranial cruciate ligament (CrCL) rupture and underwent dynamic surgical stabilization. Signalment, examination findings, preoperative TPA and surgical report were reviewed.

Results A total of 3,249 dogs underwent CrCL stabilization surgery from 2006 to 2015. Of the 3,249 dogs, 3,054 dogs met the inclusion criteria for a total of 3,922 stifles to be evaluated. The average preoperative TPA was 29° ± 3.7°. Average breed-specific preoperative TPA ranged from 27° to 35.1°, with four breeds having significantly lesser TPA and four breeds significantly greater TPA than the overall mean of dogs. Neutered dogs had a higher TPA of 28.87° ± 3.8° than non-neutered dogs with an average TPA of 26.88° ± 4.0°, p < 0.001. There was not a significant difference in average TPA between females and males, regardless of the neuter status.

Conclusion and Clinical Relevance Our reported preoperative TPA in a large sample of dogs is higher than what has been previously published. In reviewing 3,922 stifles, the average preoperative TPA was 29°. We report the average preoperative TPA in specific breeds and report that neutered dogs have a significantly higher TPA than intact dogs. This updated information may guide clinicians in management decisions regarding treatment for CrCL rupture.

Keywords

cruciate ligament disease - tibial plateau angle - dog - breed - gonadectomy

Authors' Contributions

Elisabeth A. Fox and David L. Dycus contributed to conception of study, study design, acquisition of data and data analysis and interpretation. Sherman O. Canapp Jr and Christopher S. Leasure contributed to acquisition of data. Sherman O. Canapp Jr drafted and revised the manuscript. Elisabeth A. Fox, David L. Dycus and Herbert A. Fox drafted, revised and approved the submitted manuscript.


Note

Ms. Elisabeth Fox was a third-year veterinary student at the time of publication.


 

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