Use in severe crowded cases where maximum retention is recommended. Act as a splint for any condition. Bendable connectors for perfect adaptation. Manufactured from .017” stainless steel with laminated mesh pad. Tip: Use our disposable mini ruler to measure the retainer size intra-oraly. Lingual retainers should be checked periodically for broken bonds & accumulation of food or plaque. An easy and an economic way to retain the front teeth is the use of a multi-stranded wire .0195 as a retainer, check Item 13-233-102.