Vet Comp Orthop Traumatol 2020; 33(01): 015-021
DOI: 10.1055/s-0039-1694972
Original Research
Georg Thieme Verlag KG Stuttgart · New York

Ex Vivo Comparison of the Accuracy of a Clamped with a Hand-Held Drill Guide for Drilling Distal Third Metacarpals and Metatarsals in Equids

Oliver A. James
1  Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Edinburgh, Scotland
,
Yvonne Elce
2  Langford Equine Centre, The University of Bristol, Bristol, England
,
Eugenio Cillán-Garcia
1  Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Edinburgh, Scotland
,
Richard J.M. Reardon
1  Royal (Dick) School of Veterinary Studies, The University of Edinburgh, Edinburgh, Scotland
› Author Affiliations
Funding None.
Further Information

Publication History

07 March 2019

30 June 2019

Publication Date:
09 September 2019 (online)

Abstract

Objectives The aim of this study was to determine whether a clamped drill guide can be used effectively to drill across equine distal third metacarpals and metatarsals and to compare accuracy and speed of a drilling with a hand-held drill guide.

Study Design Eighty equine cadaver limbs were divided between four surgeons with varying experience. The limbs were randomly allocated to clamped or hand-held drill guides and placed in a stand in an upright/standing position on a metal table. Drilling times from cis- to trans cortices were measured. Post-drilling computed tomography images were used to assess drilling deviations in the dorsopalmar and proximodistal directions.

Results Mean proximodistal deviation of the drill hole was distad for both guides and significantly (p = 0.01) less for the clamped drill guide +0.35° (range: –5.42°, +6.61°, standard deviation [SD] ± 3.18°) than the hand-held drill guide +2.05° (range: –5.24°, +9.81°, SD ± 3.69°). Mean dorsopalmar/plantar deviation was non-significantly (p = 0.17) less for the clamped drill guide −0.27° (range: −9.72°, +6.58°, SD ± 3.57°) than the hand-held drill guide +0.60° (range: −9.74°, + 12.33°, SD ± 4.51°). Mean time taken to drill from cis to trans cortex was significantly (p < 0.001) shorter with the clamped drill guide (41.2s) than the hand-held guide (56.6s).

Conclusion The clamped drill guide could be used successfully on the equine distal third metacarpals and metatarsals and resulted in some improved accuracy and reduced drilling time compared with the hand-held guide. The use of the clamped drill guide in vivo could be supported. This may be of benefit for certain fracture repairs in equids.

Authors' Contributions

O. James contributed to data collection, obtained the images and wrote the manuscript. Y. Elce contributed to data collection, conceived and designed the study with R. Reardon. E. Cillán-Garcia contributed to data collection and helped with manuscript preparation. R. Reardon contributed to data analyses, interpretation and wrote the results section in addition to conceiving and designing the study with Y. Elce. All authors approved the final version of the manuscript.