You may only need to wear it at night, but it will allow your tooth to tighten up on its own in these cases. If you have gum disease, then you will likely need a deep cleaning. Since gum disease creates pockets of bacteria and infection between the tooth and gum itself, this can lead to loose teeth. By cleaning the gums and removing these pockets, your gums will become healthier and they will tighten up on the teeth again.
The next step for surface mount led soldering to a circuit board is the manual reflow process. With one hand, you must reflow, or heat up the solder on the circuit board pad (where previously applied). As you re-heat this solder, slide the LED onto the center of the pads with your opposite hand.
If an LED is connect up such that it is emitting light, a multimeter can be used to measure a voltage drop across the LED. This voltage drop usually varies from 1.5V up to 5V, depending on the power output of the LED, and also the color. Low power LEDs tend to have low voltage drops, and high power LEDS have the higher voltage drops. Likewise blue or white LEDs tend have higher voltage drops, than red LEDs.