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Old retainers changing shape



I saw an old post about a question regarding wearing old retainers. Is it true retainers change shape if not kept moist? If I try putting on an old retainer (and it does seem to fit okay) would I actually be doing harm by wearing it? (it has been about 5 years since the last wear)


It will do no harm to try to wear your old retainer, but if you cannot get it to fit properly you may need a new impression and have a new one constructed. The retainer should be kept slightly moist when not being worn. 

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Response by:

Walter C Buchsieb, DDS, MS Walter C Buchsieb, DDS, MS
Professor Emeritus - Clinical, Associate of Dentistry
College of Dentistry
The Ohio State University