1 Secondary insomnia: Secondary insomnia means that a person is having sleep problems because of something else, such as a health condition (like asthma, depression, arthritis, cancer, or heartburn); pain; medication they are taking; or a substance they are using (like alcohol).ypes of Insomnia. There are two types of insomnia: primary insomnia and secondary insomnia. 1  Primary insomnia: Primary insomnia means that a person is having sleep problems that are not directly associated with any other health condition or problem.
Custom fitted mouthguards are expected to last 2-3 years with normal use. Chewing on the mouthguard dramatically reduces the expected longevity. Boil and bite mouthguards should last one season, possibly longer. Stock mouthguards could last several months.
Otherwise, your teeth may shift, especially if you stop wearing your retainer in the first two years after your braces come off. Most people wear their retainer 24/7 for at least 6 months to a year after the braces first come off. Of course, you must take your retainer out to eat or to to brush your teeth.Be sure to carry a retainer case with you to store your retainer when it is not in your mouth.ost orthodontists use one of these three types of retainers: A clear plastic retainer (also called an Essix Retainer) is sometimes placed on the upper teeth one or two days after the braces are removed. It resembles the Invisalign appliance. It is normally worn only at night and lasts an average of 24 months.