DIAG IM3 - Page 152

15External 4 Dental Equipment Fixation & Instrumentation KE Plus www.vetinst.com Connecting Bars The KE plus linear ESF system is an evolution of the original KE system. Although it is a versatile system that has functioned well over time, it has no advantage over the SF system. The KE plus clamp is designed to allow a wider range of positive threaded pins to be used than the original KE clamp, but clamp stability and security is not as good as the SF system. KE Plus is compatible with existing KE systems and is a useful addition to expand the range of the KE system. KE Plus clamps have a matt finish compared with the polished standard KE clamps. The KE Plus system is available in small, medium and large sizes, as indicated below. Connecting Bars are available in 5/16” for large clamps, 3/16” for medium clamps and 1/8” for small clamps. The thicker the bar, the stronger the frame. The shorter the bar between bone fragments, the stronger the frame. Rigidity is important early in fracture healing. When significant callus is present, it is often helpful to introduce some slight axial motion by either removing some pins or moving the clamps further away from the bone. This is known as staging down or dynamising. Bars are available in a variety of lengths. One important limitation of the KE plus system is that once the fixator has been applied to the patient, additional clamps cannot be added or removed from the connecting bar without removing the entire fixator, disassembling, and starting from the beginning. This is because the clamps cannot pass those already present on the connecting bar. This can be overcome by using the split clamp but this clamp is weaker and less secure than the standard KE plus clamp. Split Clamp Split Clamp allow the addition of an extra pin to the assembled KE plus frame without the need to dismantle the entire frame. This clamp is not as secure as the KE plus single clamp. Single KE Plus Clamp ESF Hinge Medium KE Plus with large positive pin Medium KE Plus with small positive pin Double Clamps Designed specifically to maintain reduction of luxated hips by means of a simple frame on the pelvis, the ESF hinge is also useful in transarticular frames where continued mobility is desirable, e.g. hock and elbow. Attaches to standard KE equipment. Relatively weak in abduction. Supplied with instructions for use. Extra Large Clamps and Bars Used to attach a connecting bar to another connecting bar. If possible, the fixation pins in the proximal fragment should be linked to the pins in the distal fragment via single clamps and a single connecting bar. This is not always possible because of the shape of the bones or the angle of placement of the pins. It may be necessary to connect the pins in the proximal fragment to a short connecting bar and the pins in the distal segment to another short connecting bar. Finally the two short connecting bars are joined by a long connecting bar using double clamps. The frame is not as rigid as the single connecting bar frame. Double clamps may be used to connect long bars proximally and distally, as in type III frames. Standard KE clamps made very much larger. Bars are 7/16” 11mm in diameter. Please note that two spanners are required when using Double clamps. Clamps will accept up to 5/16” 8mm pins. Suitable for foals and calves. 136