Conclusion Nursing intervention can effectively decline the incidence rate of enamel demineralization for adolescent patients with fixed orthodontic appliance.

结论：口腔专科护理干预有助于减少固定矫治中牙釉质脱矿的发生。

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Polyurethane can be used as adhesive, resin for filling, root canal filling material, implant, orthodontic appliance, tissue engineering and so on in the field of dentistry.

聚氨酯在口腔医学领域中可用于粘接剂、充填用树脂、根管充填材料、种植体、正畸弓丝以及组织工程等多方面。

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Along with the development of laser welding in dental alloy welding, it was gradually applied in orthodontic appliance for weld of Ni-Cr alloy, Co-Cr alloy or Titanium alloy.

随着激光焊接在传统牙科合金焊接领域的不断强化，在正畸矫治器制作工艺上也逐步得到了良好的运用。

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