DIAG IM3 - Page 160

15External 4 Dental Equipment Fixation & Instrumentation Circular ESF www.vetinst.com Half Rings The use of circular, or ring fixators requires patience and experience, but offers additional versatility over other systems. By maintaining wire tension across a ring, similar construct stiffness can be achieved using smaller diameter wires than linear or free-form external fixation. Coupled with good flexibility over the direction of pin placement, circular ESF can be particularly useful when managing small fragments. Frames are often constructed to allow adjustment of the spacing and angular relationship between the rings; this is very useful for adjusting bone length (capitalising on the phenomenon of distraction osteogenesis) and in the management of angular limb deformities. Bolt together to create full rings or add connection plates between two half rings to create oblong rings. Sold in pairs. In veterinary patients, true circular frames are reserved exclusively for the lower limb as full 360˚ access is required for positioning of the components. When frames are applied close to joints, full rings may restrict full joint movement and impinge on soft tissues. In these circumstances, part rings are normally substituted. Part rings are not as stiff as full rings. HALF RINGS 001846/2 001848/2 0019704 Circular style frames are sometimes used in locations where anatomical constraints completely prevent the use of full rings. All rings in an assembly of this type will be part rings or ‘arches’. The same anatomical restrictions will often prevent the use of full wires and half pins of a slightly greater diameter will often be required to achieve a similar stiffness; application to the axial skeleton an infrequent, but perhaps the most obvious example. Connection Plates Frames are often hybridised with linear components to improve their versatility. Posts holding KE Plus or SF clamps may be added to a circular ESF construct to achieve additional points of fixation or longer, hybrid rods may be used to leave a circular frame at one end of the bone and a linear frame at the other end of the bone. Most commonly this is used for the management of juxtaarticular fractures. Case: Alex Li 120mm Stainless Half Ring M6 (pair) £54.00 160mm Stainless Half Ring M6 (pair) £58.00 M6 Nut and Bolt (1 pair 4 items) (2x 001828 & 2x 001855) £4.50 Sold in pairs, except for twisted plates – sold in 4’s. CONNECTION PLATES 001820/2 0018933/2 0018934/2 0018935/2 0018936/2 0018937/2 0018938/4 0019704 Our standard M6 system can get a bit heavy for smaller patients. A smaller, M4 system is now available for smaller patients. 2 hole Connection Plates (x2) £14.00 3 hole Connection Plates (x2) £15.00 4 hole Connection Plates (x2) £16.00 5 hole Connection Plates (x2) £17.00 6 hole Connection Plates (x2) £18.00 7 hole Connection Plates (x2) £19.00 Twisted Connection Plate. 2 Hole twisted, permitting hinging between half rings (x4) £32.00 M6 Nut and Bolt (1 pair, 4 items), (2x 001828 & 2x 001855) £4.50 5/8 Rings Rings and Connection Plates Full Rings Used where anatomy would impinge on full rings. 5/8 RINGS FULL RINGS 0019701 0019702 0019703 001809 001810 001840 001811 001843 40mm Aluminium Ring M4 50mm Aluminium Ring M4 60mm Aluminium Ring M4 50mm Carbon Ring M6 70mm Carbon Ring M6 70mm Aluminium Ring M6 100mm Carbon Ring M6 100mm Aluminium ring M6 0019705 0019706 0019707 001812 001815 001841 001816 001847 001849 £29.50 £32.50 £35.00 £36.05 £39.66 £38.63 £46.35 £42.75 144 40mm Aluminium 5/8 Ring M4 50mm Aluminium 5/8 Ring M4 60mm Aluminium 5/8 Ring M4 50mm Carbon 5/8 Ring M6 70mm Carbon 5/8 Ring M6 70mm Aluminium 5/8 Ring M6 100mm Carbon 5/8 Ring M6 120mm Stainless Steel 5/8 ring M6 160mm Stainless Steel 5/8 ring M6 £32.50 £35.50 £38.00 £39.14 £42.75 £30.39 £49.44 £35.54 £38.11