An orthodontic appliance comprising: a first anchor comprising a first anchor coupling and a first base that is adapted to connect the first anchor to a surface of a first tooth , a second anchor 330, 430, comprising a second anchor coupling and a second base that is adapted to connect the second anchor to a surface of a second tooth ; and an arch member comprising an arch member body , and a first and second arch member coupling integral with the arch member body , the arch member body comprising a cross-sectional geometry that varies along a length of the body; wherein the first arch member coupling is releasably connectable to the first anchor coupling , the second arch member coupling is releasably connectable to the second anchor coupling , wherein each first and second anchor coupling comprises a slot that includes one or more openings , and wherein each of the first and second arch member couplings comprises a resilient tab that includes a barb , wherein said tab is adapted to engage the slot (36, 336, 53 6) of the corresponding anchor coupling so that said one or more openings receive said barb such that the tab is releasably connected to the slot , and further wherein the arch member body comprises a first nonlinear portion between the first arch member coupling and the second arch member coupling that is adapted to be spaced apart from the surfaces of the first and second teeth when the first and second anchors are connected to the surfaces of the first and second teeth and the first and second arch member couplings are releasably connected to the anchor couplings of the first and second anchors . a first anchor comprising a first anchor coupling and a first base that is adapted to connect the first anchor to a surface of a first tooth , a second anchor 330, 430, comprising a second anchor coupling and a second base that is adapted to connect the second anchor to a surface of a second tooth ; and an arch member comprising an arch member body , and a first and second arch member coupling integral with the arch member body , the arch member body comprising a cross-sectional geometry that varies along a length of the body; wherein the first arch member coupling is releasably connectable to the first anchor coupling , the second arch member coupling is releasably connectable to the second anchor coupling , wherein each first and second anchor coupling comprises a slot that includes one or more openings , and wherein each of the first and second arch member couplings comprises a resilient tab that includes a barb , wherein said tab is adapted to engage the slot (36, 336, 53 6) of the corresponding anchor coupling so that said one or more openings receive said barb such that the tab is releasably connected to the slot , and further wherein the arch member body comprises a first nonlinear portion between the first arch member coupling and the second arch member coupling that is adapted to be spaced apart from the surfaces of the first and second teeth when the first and second anchors are connected to the surfaces of the first and second teeth and the first and second arch member couplings are releasably connected to the anchor couplings of the first and second anchors . <EOS>