Evaluation of osteotomy accuracy and rotational and angular alignment for cranial closing wedge ostectomy performed with and without alignment aids

Vet Surg. 2015 Jan;44(1):78-84. doi: 10.1111/j.1532-950X.2014.12228.x. Epub 2014 Jun 7.


Objective: To (1) investigate the use of K-wires as alignment aids for cranial closing wedge ostectomy (CCWO) and (2) evaluate their effect on osteotomy accuracy and angular/rotational alignment.

Study design: Cadaveric study.

Animals: Cadaveric pelvic limbs (n = 20).

Methods: CCWO was performed with and without alignment aids on 20 cadaveric pelvic limbs. CT scans were performed pre- and post-operatively to evaluate tibial torsion and valgus/varus deformity. Digital photographs of the ostectomized bone wedges were used to assess divergence of the 2 osteotomies, and the area of the medial and lateral aspects measured to assess osteotomy angulation within the dorsal plane.

Results: Osteotomy divergence angle, the difference between the area of the medial and lateral aspects of the ostectomized wedges, and the difference between the pre- and post-operative angles of valgus/varus deformity were all significantly smaller for the alignment aid group. The difference in pre- and post-operative tibial torsion was not significantly different between groups.

Conclusions: K-wires can be used successfully as alignment aids during CCWO and help to create a significantly more orthogonal osteotomy. This allows a significant reduction in the difference between the preoperative and postoperative angles of valgus or varus, which may reduce the risk of developing a clinically important iatrogenically introduced valgus/varus deformity postoperatively.

Publication types

  • Evaluation Study

MeSH terms

  • Animals
  • Arthroplasty, Replacement, Knee / veterinary
  • Cadaver
  • Dogs / surgery*
  • Models, Animal
  • Osteotomy / veterinary*
  • Postoperative Complications
  • Range of Motion, Articular
  • Tibia / surgery*