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Vet Comp Orthop Traumatol 2014; 27(06): 470-477
DOI: 10.3415/VCOT-14-02-0018
Original Research
Schattauer GmbH

Effect of tibial subluxation on the measurements for tibial tuberosity advancement in dogs with cranial cruciate ligament deficiency

An ex vivo study
M. J. Bielecki
1   Tierklinik Haar, Haar, Germany
,
C. S. Schwandt
1   Tierklinik Haar, Haar, Germany
,
S. Scharvogel
1   Tierklinik Haar, Haar, Germany
› Author Affiliations
Further Information

Publication History

Received: 03 February 2014

Accepted: 25 July 2014

Publication Date:
23 December 2017 (online)

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Summary

Objectives: The main objectives were to evaluate the impact of femorotibial subluxation on the preoperative measurements for tibial tuberosity advancement (TTA) by defining radiographic landmarks and testing the repeatability for assessing cranial tibial subluxation (CTS). Also, we aimed at developing a formula to calculate the necessary adjustment in measurement of TTA in stifles with CTS.

Methods: Forty stifles were used to examine the influence of CTS on preoperative TTA measurements before and after transection of the cranial cruciate ligament. Mediolateral radiographs were obtained and measurements performed by three investigators. The observed variabilities were assessed by interand intra-observer differences.

Results: Measurements of CTS and preoperative TTA showed a good to excellent interand intra-observer correlation. We found a significant influence of CTS on TTA measurements and developed a formula to calculate the necessary adjustment in measurement of TTA in stifles with CTS.

Conclusion: We found a correlation between the tibial subluxation and the measurements for TTA, with the latter decreasing with increasing subluxation. This has to be taken into account when measuring the advancement in stifles with complete rupture of the cranial cruciate ligament. We provided a formula to calculate the necessary addition to the measured advancement.

Keywords

Subluxation - TTA - tibial tuberosity advancement - cranial cruciate ligament rupture - cranial cruciate ligament deficiency - dog
 

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