When a tooth is lost,the adjoining teeth in the same arch may migrate in an effort to fill the void.And tooth movement changes occlusal relations with antagonists in opposing dental arches.The common result is hypereruption of the tooth opposing the space left by the lost tooth. 190 When a tooth is lost, the adjoining teeth in the same arch may migrate in an effort to fill the void. And tooth movement changes occlusal relations with antagonists in opposing dental arches. The common result is hypereruption of the tooth opposing the space left by the lost tooth