I assume that when you talk about " hyper-eruption", you are referring to a tooth that over-erupts. Usually this is caused by the absence of an opposing tooth, which allows the tooth to continue to " grow" in a vertical dimension.
At a certain point it can lead to problems with your occlusion, since it might influence your bite.
Usually the over-eruption does not affect the bone level by itself. It usually becomes a problem if the area surrounding the tooth, becomes a food trap. If food gets stuck and you don't clean it out nicely, you might have localized bone loss adjacent to the tooth after a certain amount of time.
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