Objectives: 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: 80 equine cadaver limbs were divided between 4 surgeons of 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 CT 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 +0.35º (range -5.42º, +6.61º, SD ±3.18º) than the hand-held drill guide +2.05º (range -5.24º, +9.81º, SD ±3.69º). Mean dorsopalmar/plantar deviation was non-significantly (p=0.17) less for the clamped drill guide -0.27º (range -9.72º, +6.58º, SD ±3.57º) than the hand-held drill guide +0.60º (range -9.74º, +12.33º, SD ±4.51º). 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 to 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.
|Journal||Veterinary and Comparative Orthopaedics and Traumatology|
|Early online date||9 Sep 2019|
|Publication status||E-pub ahead of print - 9 Sep 2019|