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Vet Comp Orthop Traumatol 2015; 28(05): 331-338
DOI: 10.3415/VCOT-14-12-0186
Original Research
Schattauer GmbH

Tibial anatomy in normal small breed dogs including anisometry of various extracapsular stabilizing suture attachment sites

P. G. Witte
1   Southern Counties Veterinary Specialists, Hangersley, Ringwood, Hampshire, UK
› Author Affiliations
Further Information

Publication History

Received:19 December 2014

Accepted:26 May 2015

Publication Date:
28 December 2017 (online)

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Summary

Objectives: To investigate proximal tibial anatomy and its influence on anisometry of extracapsular stabilizing sutures in small dog breeds.

Materials and methods: Mediolateral radiographs of the femora, stifles, and tibiae of 12 small breed dogs were acquired with the stifles positioned at various angles. Measurements taken included tibial plateau angle (TPA), diaphyseal: proximal tibial angle (DPA), patellar tendon angle (PTA), Z-angle, relative tibial tuberosity width (rTTW), and the distance between six combinations of two femoral and three tibial extra-capsular stabilizing suture (ECS) attachment sites. Theoretical strain through stifle range-of- motion was recorded.

Results: The TPA (32° ± 5.8°), DPA (10.2° ± 7.3°), PTA (103.7° ± 6.2°), and Z-angle (70.4° ± 9.0°) were positively correlated with one another (R >0.7), but none were correlated with rTTW (0.93 ± 0.10). The F2-T1 combination of ECS attachment sites had lowest strain for nine stifles. The shortest attachment site separation was at a stifle flexion of 50° for nine stifles. Proximal tibial anatomy measurements could not predict optimal attachment site combination, optimal stifle angle for suture placement, or ECS strain.

Clinical significance: There is individual variation in the optimal attachment site combination and stifle angle for suture placement, which may influence consistency of outcomes with ECS.

Keywords

Cranial cruciate ligament rupture - isometry - extracapsular suture - tibial plateau angle - TPA - diaphyseal proximal tibial angle - DPA
 

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