Periodontal splinting is a technique used to stabilize teeth which have become loose. Loose teeth most often occur from periodontal disease where much of the supporting bone has deteriorated. However, loose teeth may also be a result of injury or grinding. Splinting distributes your biting force among groups of teeth rather than individual loosened teeth.
Most often, teeth that are loose enough to require splinting have less than 40% of the supporting bone left. In some cases where tooth roots are abnormally short or thin, or if the bone around them is not particularly dense, teeth may show signs of being loose when more than 40% of bone volume still exists.
The long term outlook or diagnosis of the teeth and gums must be considered before deciding upon these treatment options. In some cases an active periodontal disease is the cause for your loose teeth and simply bringing the diseases under control can firm up your loose teeth. In other cases the teeth themselves may need to be replaced if damage is severe.