How many screws per clamp should be used?
A minimum of two screws per clamp should be used. In the femur and tibia it is advisable in adults to use three screws per clamp to increase stability. In long term treatments, where there is a higher risk of bone screw infection or loosening, the use of three screws is an additional advantage. This is because the removal of one loose or infected bone screw will not prejudice the continued use of the fixator, and unnecessary surgery is avoided.
Is there a place for an inter-fragmentary lag screw in long oblique or spiral fractures treated with an Orthofix?
Never in cortical bone. Diaphyseal fractures treated with Orthofix dynamic axial fixation heal by the formation of external callus. This is Nature's way, and is faster and more efficient than the so-called direct healing by the process of remodelling, which occurs in fractures rigidly fixed with a plate. The use of an inter-fragmentary lag screw prevents the micromovement which stimulates the formation of external callus, and delays healing. Inter-fragmentary screws should only be used in cancellous bone
What material is the fixator made of?
Generally two materials are used: aluminium alloy finished with a black anodised coating, and stainless steel. Some radiolucent components are made of a plastic composite.
Is it possible to place bone screws in different planes with the Orthofix DAF or Procallus?
Yes, by using the Supplementary screw holder (code 10037) which can be fitted on the central body of the DAF or onto a bone screw in a clamp. This screw may need to be removed before dynamization is initiated depending on the configuration of the frame.
May the Radiolucent Ankle Clamp be re-sterilized?
Yes! Re-sterilization is acceptable.
Can the articulation be locked in place?
Yes, with a locking screw on the bottom of the clamp. The location of the locking screw allows the clamp to be ambidextrous for either the left or right leg.