An apparatus for subcutaneous, self-holding distraction osteogenesis

摘要

An apparatus and method for submergible self-retaining distraction osteogenesis are provided. Distraction osteogenesis devices are submerged below a layer of tissue and/or skin layers and are activated based on maximum pressures, rather than constant activation rates. Distraction osteogenesis devices are also self-retaining in that the force in displacing bone segments is transferred substantially through metal plates, rather than screws or fixation points. In particular, zygomatic (10), alveolar (69), and mandibular (93) distraction osteogenesis devices are provided. The zygomatic and alveolar distraction osteogenesis devices include a submergible first and second metal plate (15, 16, 63, 64) along with a threaded rod (11, 60). The zygomatic and alveolar distraction osteogenesis devices are activated using a cannula (31, 72), torque wrench adapter (32, 73), and torque wrench (30). The mandibular distraction osteogenesis device (93) includes a palate expander (90) having a plurality of rods (94, 95) used in coupling first and second self-retaining U-shaped plates (91, 92). The mandibular distraction osteogenesis device is activated using an allen wrench (102). In order to allow for maximum bone growth and/or distraction, a maximum pressure between bone segments is applied by a torque or allen wrench.