This tag implies that the bands and artists are Serbian or originated in Serbia. Music represented by this tag is often highly commercial. Other, possibly better, Serbian tags are, for example Novi Val or nova srpska scena.
Relapse means that the teeth can take up to one year or more to stabilize after treatment. If you had gaps between your teeth before treatment, the retention period will be longer. Usually, retainers are worn for as long a time as you have had your braces.
The advantage of Essix retainers over Fixed retainers is that it retains every tooth in the mouth and not just the front six teeth. The retention regime is usually: Full time wear (20-22 hours a day) for the first four months after brace treatment. Night time wear (12 hours a night) for the following 8 months.