Treatment of Class I crowding using simple tubes bonded with customized resin coverings: A case report

Abstract

As an alternative to the conventional fixed appliance that uses orthodontic brackets, a simple round tube without a bonding base can be bonded to the tooth surface by covering the tube with flowable resin. In this technique, bent wires cannot be inserted into the simple tubes; therefore, repositioning of the simple tubes is often required for adjustments. To reduce repositioning of simple tubes, a dome-shaped resin covering of the simple tube can be designed with a customized in-and-out compensation, using three-dimensional computer-aided design software based on digital simulation of orthodontic tooth movement. In the present case, the use of simple tubes bonded with customized resin coverings in a Class I nonextraction case is described in a 17-year-old male, in whom moderate crowding of the anterior teeth was treated over an 8-month period. This case shows that simple tubes can be used as an alternative to brackets in some Class I nonextraction cases, with the potential benefit of reducing decalcification.

Minor Orthodontic Treatment Using NiTi Wire Exerting Light Force: Case Reports

“…The biggest advantage of this method is that it can attach appliances rapidly and easily on parts that need application. The difficulty in the conversion of the wire's restitution force into couple force due to the lack of a gap and the absence of brackets is addressed by using elastic NiTi wire [13,14]. This is because NiTi wire has a torsional stress that is 1/4 th -1/5 th that of stainless steel wire, sufficient strength, and low stiffness, so it can exert an ultra-light force.…”