She broke 2 of her brackets on her braces.
Their liability would be the cost of new brackets. Did you inform the manager when it happened, and file an incident report? Hopefully, they will take case of it. Contact a local personal injury attorney for a consult. You should be able to get one for free, or even just to discuss it over the phone.
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Put restaurant on notice or have your lawyer writ them. Get braces fixed and get dentist to write a letter about what caused the break assuming as a fact what you have told him about the cause. Send the bone and the dentist letter to restaurant. They probably have med pay and will pay something for a release.
My answer is not a legal opinion and is not made to you or anyone as a client. it is primarily practical advice in connection with how these matters should be handled based on 43 years of experience, as a former Tort/ Product Liability Adjunct Professor, and having handled and tried to a verdict many product liability and liability cases.
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