Consult your dentist: Rough edges on any part of a retainer may cause sore spots on the gums. As the tongue interacts with these spots, canker sores can naturally arise. This can be alleviated by returning to your dentist/orthodontist to smooth these edges and provide relief. Any mouth sores should not be ignored, and should always be evaluated by your dental professional.
Answered 2/24/2014
4.9k views
Trauma: Trauma from the retainer may initiate the canker sores. Ask you dentist to adjust it for you
Answered 9/29/2016
4.9k views
Sores: Sounds like your retainer needs to be adjusted/replaced/reconfigured/smoothed. Important that you see the Dentist or Orthodontist who made the appliance for you, who best knows why you need a retainer, and what function the retainer is supposed to have in your particular case.
Answered 12/23/2017
441 views
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