By placing the condyle in its fossa, the GELB splint repositions the mandible, resulting in neuromuscular equilibrium. This splint can further close the bite in orthodontic treatment.
The GELB splint is fitted with retention clasps. Its two acrylic pads are linked together by a very stiff lingual bar that extends along the gingival and lingual surfaces of anterior teeth. These pads cover the mandible posterior teeth. The maxillary posterior teeth rest on the area where the splint is slightly indexed at the upper lingual cuspid. Moreover, the splint enables the mandible to reposition itself slightly forward.