An oral sleep appliance is part of a medical treatment, so when it fails, two things need attention: the device and your sleep. A cracked tray, a slipped connector or a sudden change in fit can each stop it from holding your jaw as prescribed. Before anyone can say whether a repair is worthwhile, they need to know what kind of appliance it is, what has happened to it, and whether the end result could be used properly again.
For tonight, set the appliance aside and avoid improvising. Put it and any loose pieces into the case, and find the instructions or supplier details if you can. In the morning, contact the physician or clinic that manages your sleep treatment and explain that the device is out of action. Then think about what might have led to the problem, such as a fall, heat, recent dental work or a fit that had been feeling off.
When you call us from Acton, we can talk through the damage, explain how assessment is arranged and say whether the original lab or provider should be involved. Knowing that helps you tell your sleep team how long the gap might last. Be prepared for the possibility that this device, or this kind of break, isn’t fixable. Until someone has examined it, quick turnaround, specific spare parts and warranty help are all open questions.