Phonetics vs. Phonology â¢Phonetics: the study of speech sounds â¢Phonology: the study of the sound systems of languages (sound system = inventory of sounds + rules). Phonetics vs. Phonology â¢Phonetics says: ^The /k/ in call h[k h Él] and in key [k i] are phonetically distinct.
Retainers are fitted at the end of orthodontic treatment after the braces are removed. They can be either removable or fixed onto the teeth. There are different types of retainers. The choice of retainer is affected by a number of different factors and your orthodontist will explain which retainer is best for you. Sometimes you will be recommended to wear more than one type of retainer to reduce the chances of the teeth relapsing. Types of retainers. There are lots of different types of retainers. The commonest types of retainers used in the UK are the vacuum-formed retainer, the bonded retainer and the Hawley retainer.
The first is to hold the corrections of the back teeth. bonded retainers do come loose to make sure the front teeth stay in place. the retainers for any nighttime grinding or clenching. bonded retainers to come loose due to the excessive forces that are placed on the teeth.