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DOI: 10.3415/VCOT-11-04-0057
Radiographic measurement for femoral varus in Pomeranian dogs with and without medial patellar luxation
Publication History
Received
13 April 2011
Accepted
23 January 2011
Publication Date:
19 December 2017 (online)
![](https://www.thieme-connect.de/media/10.1055-s-00035023/201203/lookinside/thumbnails/10-3415-vcot-11-04-0057-1.jpg)
Summary
Objectives: To measure radiographically the inclination angle (ICA), femoral varus angle (FVA), anatomical lateral distal femoral angle (aLDFA), and mechanical lateral distal femoral angle (mLDFA) in Pomeranian dogs with and without medial patellar luxation (MPL).
Materials and methods: Stifles of 34 Pomeranian dogs were graded and allocated into three groups: normal, grades I-II MPL, and grade III MPL. Angle values were measured from craniocaudal radiographs of the hindlimbs by each of the three examiners on three separate occasions.
Results: Each of the three groups consisted of 15 stifles. Means ± SD for the ICA, FVA, aLDFA and mLDFA in the normal stifles were 136.46 ± 7.12°, 5.85 ± 3.18°, 95.21 ± 3.48° and 99.46 ± 4°, respectively. No significant differences (p >0.05) in the measured values for the ICA between groups were observed. The FVA, aLDFA and mLDFA values in grade III MPL group were significantly (p <0.05) greater than those in the other two groups. Significant differences in the three angles between the normal and grades I-II MPL groups were not observed.
Clinical significance: Significant change of distal femoral varus exists in Pomeranian dogs with grade III MPL.
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References
- 1 Hulse DA. Medial patellar luxation in the dog. In: Disease Mechanisms in Small Animal Surgery. Bojrab MJ. editor. Philadelphia: Lea and Febiger; 1993. pg. 808-817.
- 2 Willauer CC, Vasseur PB. Clinical results of surgical correction of medial luxation of the patella in dogs. Vet Surg 1987; 16: 31-36.
- 3 Slocum B, Slocum TD. Alignment problems of the hindlimb. Proceedings of the 10th ESVOT Congress. 2000. March 23-26 Munich, Germany: pg. 60-62.
- 4 Swiderski JK, Palmer RH. Long-term outcome of distal femoral osteotomy for treatment of combined distal femoral varus and medial patellar luxation: 12 cases (1999-2004). J Am Vet Med Assoc 2007; 231: 1070-1075.
- 5 Palmer RH. Controversies in the management of patellar luxation. Proceedings of the BVOA Spring Scientific Meeting. 2008. April 2 Birmingham, England: pg. 30-34.
- 6 Peruski AM, Kowaleski MP, Pozzi A. et al. Treatment of medial patellar luxation and distal femoral varus by femoral wedge osteotomy in dogs: 30 cases (2000–2005). Proceedings of the 2nd World Veterinary Orthopedic Congress. 2006. February 25 - March 4 Keystone, Colorado (USA): pg. 240.
- 7 Piermattei DL, Flo GL, DeCamp CE. editors. Patellar Luxation. In: Handbook of Small Animal Orthopedics and Fracture Repair. St Louis: Saunders Elsevier; 2006. pg. 562-582.
- 8 Palmer RH. Patellar luxation: simple to the complex. Proceedings of the 34th World Small Animal Veterinary Association Congress. 2009. July 21-24 Sao Paulo, Brazil.:
- 9 Swiderski JK, Radecki SV, Park RD. et al. Comparison of radiographic and anatomic femoral varus angle measurements in normal dogs. Vet Surg 2008; 37: 43-48.
- 10 Dudley RM, Kowaleski MP, Drost WT. et al. Radiographic and computed tomographic determination of femoral varus and torsion in the dog. Vet Radiol Ultrasound 2006; 47: 546-552.
- 11 Tomlinson J, Fox D, Cook JL. et al. Measurement of femoral angles in four dog breeds. Vet Surg 2007; 36: 593-598.
- 12 Ikuta CL, Palmer RH, Cadmus JM. et al. Does radiography permit accurate measurement of femoral angulation across a broad range of femoral conformations? Proceedings of the 35th Annual Conference of Veterinary Orthopedic Society. 2008. March 8-15 Big Sky, Montana (USA): pg. 29.
- 13 Paley D. editor. Normal lower limb alignment and joint orientation. In: Principles of Deformity Correction. Berlin: Springer-Verlag: 2002. pg. 1-18.
- 14 Priester WA. Sex, size, and breed as risk factors in canine patellar dislocation. J Am Vet Med Assoc 1972; 160: 740-742.
- 15 Alam MR, Lee JI, Kang HS. et al. Frequency and distribution of patellar luxation in dogs. Vet Comp Orthop Traumatol 2007; 20: 59-64.
- 16 Tonks CA, Tomlinson JL, Peck JN. Radiographic measurements of femoral angles in nonchondrodystrophic, small breed dogs. Proceedings of the 35th Annual Conference of Veterinary Orthopedic Society. 2008. March 8-15 Big Sky, Montana (USA): pg. 90.
- 17 Mortari AC, Rahal SC, Vulcano LC. et al. Use of radiographic measurements in the evaluation of dogs with medial patellar luxation. Can Vet J 2009; 50: 1064-1068.
- 18 Towle HA, Griffon DJ, Thomas MW. et al. Pre- and postoperative radiographic and computed tomographic evaluation of dogs with medial patellar luxation. Vet Surg 2005; 34: 265-272.
- 19 Kowaleski MP. Corrective osteotomy for medial patellar luxation. Proceedings of the International Congress of the Italian Association of Companion Animal Veterinarians. 2009. May 29-31 Rimini, Italy: pg. 357-360.
- 20 Daems R, Janssens LA, Beosier YM. Grossly apparent cartilage erosion of the patellar articular surface in dogs with congenital medial patellar luxation. Vet Comp Orthop Traumatol 2009; 22: 222-224.
- 21 Bound N, Zakai D, Butterworth SJ. et al. The prevalence of canine patellar luxation in three centres. Vet Comp Orthop Traumatol 2009; 22: 32-37.
- 22 Fasanella FJ, Horstman CL, Mason DR. et al. Radiographic measurement of the femoral axes, joint angles, and varus angle in orthopedically normal small breed dogs and small breed dogs with medial patellar luxation. Proceedings of the 38th Annual Conference of Veterinary Orthopedic Society. 2001 March 5-12 Snowmass, Colorado (USA): pg. A3.