Self-locking bone-supporting anti-rotation bone distractor

Abstract

The invention discloses a self-locking bone-supporting anti-rotation bone distractor, and belongs to the field of medical equipment. The self-locking bone-supporting anti-rotation bone distractor canbe fixed at the top of an iliac crest by six or four anchorage nails, and an orthodontic force is directly transmitted to a palatal suture, thereby maximizing the bony effect without generating a tooth effect. Locking screws prevent rotation, so that the possibility of recurrence is reduced, and the stability of an arch is increased; a rotating rod can wrap complicated structures inside threaded tracks, so as to avoid food accumulation in gaps of these structures, and an oral cavity is easy to clean.

Description

technical field [0001] The invention belongs to the field of medical equipment, and in particular relates to a self-locking bone support anti-rotation bone distractor. Background technique [0002] Patients with narrow upper dental arch or insufficient lateral development of the upper jaw usually need orthodontic treatment by assisting maxillary arch expansion and distraction osteogenesis, and the spiral arch expander is currently the most commonly used maxillary arch expander in clinical practice. [0003] Traditional spiral expanders, such as the Hass type and Hyrax type spiral expanders, are generally formed by connecting the tooth fixation belt ring and the expander. Rotate the helical expansion hole to expand the arch expander, so that the orthodontic force is transmitted to the teeth, alveolar bone and palatal suture through the tooth fixing belt ring, so as to expand the dental arch and palatal suture, and increase the width of the maxillary dental arch. [0004] How...

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Problems solved by technology

[0004] However, because the traditional spiral expander is connected to the teeth with a fixed belt ring, most of the orthodontic force generated will directly act on the teeth, causing problems such as buccal inclination, buccal cortical bone fenestration, buccal root absorption, and gingival recession. Due to the limited correction force transmitted to the palatal suture, the expansion effect of the palatal suture is poor, and the possibility of recurrence is high

[0005] In addition, in the actual use process, due to the strong reverse force of the jaw on the expanding expander, it often leads to the spiral rotation of the expanding expander, weakening the expansion effect, and it is impossible to accurately judge the expansion degree and distance when expanding again

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