NEW MANDIBLE PRODUCTS
Scott P Bartlett, Lim K Cheung, Carl-Peter Cornelius, Daniel Buchbinder
NEW MANDIBLE PRODUCTS Mandible External Fixator II After the release of the first mandible external fixator in July 2004 the feedback from clinicians, often requesting more technical ease and versatility, led to the development of the mandible external fixator II. Although the mandible external fixator II system comes with many new features, it addresses the same clinical indications as the original system: • Severe open mandibular fractures • Highly comminuted closed fractures • Nonunions and delayed unions (especially associated with infection) • Tumor resections • Facial deformity correction • Gunshot wounds • Panfacial fractures • Burn maintenance • Bone grafting defects A strong impetus from surgeons was the request for an increased number of snap-on clamps in the kit. Thus, instead of the original eight, the new system contains a larger number of clamps. The set contains self-drilling anatomic Schanz screws with two thread lengths for each anatomical region (symphysis, body, ramus) and a shoulder stop to prevent overinsertion. The shaft length of the screws is adapted to the local skin thickness and respects the regional geometry of the mandible (symphysis, body, ramus). The Schanz screw shaft allows for use with rapid driver systems. The 4.0 mm titanium connecting rods are available in four sizes (full mandible, full mandible with ramus, three-quarter mandible, and one-half mandible). Anatomically prebent to the mandibular shape the metal rods cover a wide anatomic variety but can be contoured to match individual patient needs with the included rod bender. To ensure optimal stability of the framework construction the connecting rods should be positioned approximately one fingerbreadth away from the patient’s skin surface, evenly around the mandibular circumference, in order to keep the cantilevers along the Schanz screws short. At least two Schanz screws should be placed on large segments: One in close proximity (10 mm) to the fracture or resection line and another one preferably another 10 mm away from that.
Published on May 5, 2008