America's dentists are alarmed by a trend for mouth adornments which encase teeth in precious metals and jewellery.
America's dentists are alarmed by a trend for mouth adornments which encase teeth in precious metals and jewellery.
目前，由金属制成的装饰牙套成为美国时尚青年的新宠，但口腔科专家近日向佩带者发出警告说，谨防口腔疾病！