Abstract
ABSTRACT: This study assessed radiographically changes in tibial alignment in the frontal and sagittal planes in dogs that underwent minimally invasive plate osteosynthesis (MIPO) without the aid of image intensifiers. Radiographs of dogs with complete non-articular tibial fractures submitted to MIPO were included and evaluated, without the aid of a transoperative image intensifier and / or an association of implants. The tibial mechanical angles (mMPTA, mMDTA, mCaPTA and mCrDTA) were measured by three evaluators. The data obtained were compared with results from previously published studies. Twenty-seven animals were included in the study. The mean and standard deviation of the angular changes were as follows: mMPTA, 2.54° ± 3.10 (-1.1º to 8.7º); mMDTA, 0.03º ± 0.16 (-3.44º to 0.79º); mCaPTA, 37º ± 4.29 (-6.23º to 14.87º); and mCrDTA, 8.25° ± 5.53 (-0.2º to 17.28º). There was a negative correlation between “mCaPTA” and “mCrDTA”. MIPO of the tibia without using image intensifiers and implant association can potentially cause angular changes, which can lead to clinically relevant deformities after bone healing.
Highlights
This study assessed radiographically changes in tibial alignment in the frontal and sagittal planes in dogs that underwent minimally invasive plate osteosynthesis (MIPO) without the aid of image intensifiers
Improvements in already established fracture fixation techniques and the description of new techniques in veterinary orthopedics have been constantly observed in recent decades, especially those related to the concept of biological osteosynthesis
Invasive plate osteosynthesis (MIPO) represents a large portion of biological osteosynthesis performed in dogs and cats, and excellent results have been reported (SCHMOKEL et al, 2007; GUIOT et al, 2011; BARONCELLI et al, 2012; POZZI et al, 2013)
Summary
This study assessed radiographically changes in tibial alignment in the frontal and sagittal planes in dogs that underwent minimally invasive plate osteosynthesis (MIPO) without the aid of image intensifiers. Radiographs of dogs with complete non-articular tibial fractures submitted to MIPO were included and evaluated, without the aid of a transoperative image intensifier and / or an association of implants. A média e desvio padrão das alterações angulares foram os seguintes: mMPTA= 2,54° ± 3,10 (-1,1o a 8,7o); mMDTA= 0,03o ± 0,16 (-3,44o a 0,79o); mCaPTA= 37o ± 4,29 (-6,23o a 14,87o); e mCrDTA= 8,25 ° ± 5,53 (-0,2o a 17,28o). The studies published by APIVATTHAKAKUL & CHIEWCHARNTANAKIT (2009) and ZOU et al (2013) showed more relevant rates of deviations, even when using fluoroscopy, which raises the need for a better understanding of this postoperative complication in minimally invasive orthopedic procedures
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