Measurement of temperature generation in the corium of bovine claws during claw trimming with an angle grinder using different grinding and cutting disks.

摘要

Correct functional claw trimming (sole horn thickness 5 mm; group I) was performed in 80 bovine hindclaws from slaughtered cows. Standardized, incorrect claw trimming (sole horn thickness 2 mm; group 2) was performed in another 80 hindclaws. Four different disks (one cutting and three grinding disks) were used. Two thermocouples were inserted into the solar corium, and the heat production on the corium was measured during claw trimming. During correct functional claw trimming with each of the 4 disks, a temperature increase in the corium with a median of ?0.3 degrees C was calculated. During incorrect claw trimming (2 mm sole horn thickness), a temperature increase with a median of ?0.3 degrees C was determined for the first 3 disks. During claw trimming using the abrasive semiflexible plastic disk, a median of 1.3 degrees C temperature increase was calculated. Comparison of the temperatures measured in the claws from groups I and II showed a significant difference between the 4 disks. Comparison of the temperature increase within each group (groups I and II) showed a significant difference between the cutting disk with steel blades and the abrasive, semiflexible plastic disk in both groups. The highest temperatures measured were 41.5 degrees C in group I using the disk with 70% amount of fitted hard metal granulate, and 42.2 degrees C in group II (temperature increase of 10.6 degrees C) using the abrasive semiflexible plastic disk. Under the experimental conditions of this study, only a very slight thermogenesis was observed when the functional and correct claw trimming using the 4 tested disks was performed. This slight thermogenesis should not cause thermic injury of the corium. By trimming the sole horn incorrectly (2 mm), the measured heat generation in the corium was minor, without danger of thermic insult, except for using the disk with 70% fitted hard metal granulate and the abrasive semiflexible plastic disk. It was unlikely that a short-term temperature increase of 10.6 degrees C could cause thermic insults on the solar corium..