名词
中文翻译：固定保持器
同义词：
['固定牙套，固定桥例句：1. The fixed retainer is designed to hold the teeth in place until they are fully grown.（固定保持器设计用来在牙齿完全长成之前固定它们。）']
例句：
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1. The fixed retainer is designed to hold the teeth in place until they are fully grown.
固定保持器设计用来在牙齿完全长成之前固定它们。
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2.She needed a fixed retainer to align her teeth before the procedure.
她在手术前需要一副固定保持器来对齐她的牙齿。
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3.The fixed retainer helped her maintain her new smile for several years.
固定保持器帮助她维持了几年的新笑容。