Abstract
Objective The aim of this study was to evaluate a fixed-angle cutting guide designed to aid
in the performance of coplanar wedge osteotomies using a proximal tibial cranial closing
wedge ostectomy model.
Study Design A 30-degree cranial closing wedge ostectomy was created using canine tibia models
with either a standard template (method T) or a wedge osteotomy guide (method G) by
two surgeons. One surgeon was experienced with both procedures, and one surgeon had
no previous experience with the wedge guide. The ostectomy wedges were evaluated for
wedge angle, using a digital protractor, and coplanarity by using digital photographs
and screen-measuring software.
Results The mean (standard deviation) wedge angles of the T and G groups were 28.16 (1.33)
and 28.4 degrees (1.46) respectively. The mean (standard deviation) divergence angles
of the T and G groups were 3.21 (1.86) and 2.22 degrees (1.69) respectively. The measured
reference angles of the template and cut guides were 31.27 and 29.60 degrees respectively.
Individual and cross-surgeon analysis of outcomes found no significant differences
when comparing wedge angle or coplanarity with either method regardless of surgeon
experience. However, mean wedge angle of group G was significantly closer to the measured
reference angles than group T (p < 0.01).
Conclusion Use of a fixed-angle surgical wedge guide was successful in consistently producing
accurate closing wedge ostectomies regardless of surgeon experience. These results
show that use of the guide is a valid method for performing wedge ostectomies.
Keywords
wedge osteotomy - deformity correction - corrective osteotomy - osteotomy guide
