Tungsten-carbide, when milled to a very fine point or edge, is highly susceptible to chipping if brought into abrupt contact with other hard surfaces including the very hard enamel of horses' teeth. To minimise the risk of chipping these rasps, a fluent and measured motion should be employed during the floating process. Care should also be taken when storing or transporting these rasps.
The economy of using these rasps can be somewhat enhanced by rotating the use of each rasp in other handles. Whilst it is advisable to use sharp, efficient rasps on the major portion of all molar arcades, a slightly used (or "conditioned") rasp may be preferable when shaping the foremost side facets of the first upper and lower cheek teeth.
The choice of only two lengths (40mm and 50mm) in the milled rasps is based on preferences from within the industry. It is generally considered that long rasps are harder to manoeuvre within the restricted confines of a horse's mouth and along the normal curvatures of the molar arcades. The Edge Equine do however, supply an 83mm gritted rasp that is suited to use on the upper #1,#2, and #3 cheek teeth.
Expediency and Efficiency
Using sharp, efficient tungsten-carbide rasps minimises the time and effort required to perform both routine and extraordinary dental procedures. This in turn will reduce the number of impatient or intolerant horses that would otherwise require sedation.
Also, in light of the physical and highly repetitive nature of manual floating procedures, the use of sharp, efficient tungsten-carbide rasps lessens the risks to the practitioner of repetitive strain injury (RSI) or general muscle fatigue.