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现代人为牙齿整齐、美观,流行“牙箍整形技术”。然而,现有技术存在着不美观、不卫生等诸多不便。
Modern people have neat and beautiful teeth, and they are popularly known as “hoop braces”. However, the prior art has many inconveniences such as unsightly appearance, unsanitaryness and the like.