A dental aligner apparatus is comprised of a bar, a rotatable end member, a slidable end member, and a spring member. The bar includes a first end member and a second end member. The rotatable end member is disposed at a first end of the bar and coupled to the first end member. The slidable end member is disposed at a second end of the bar and coupled to the second end member. The spring member is disposed between the rotatable end member and the slidable end member and coupled to the first and second end members.