Archwire Sequencing

A key component of the Damon System is the use of passive self-ligating brackets with high-technology archwires. These archwires and corresponding sequencing have been carefully selected to keep the applied force in the "optimal force zone" during each of the four phases of treatment.

Clinicians are encouraged to choose archwire sizes very carefully and not just based on "what can I get in?" or "patient tolerance." Choose the correct archwire size and give it time to work!

Phase I: Initial Light Round Wires

In the initial Ni-Ti light round wire phase, archwires are carefully selected to minimize binding between the "tube" of the passive self-ligating bracket and the archwire. This allows sliding of the teeth and brackets along the wire as they start to level and align.

Binding and friction in a conventional mechanical system comes from the ligature pushing on the wire and the seating of archwire against the base of the slot. There is also the binding created by the deflection of the archwire against the sides of the bracket slots in crowded cases.

In recent years, many clinicians have started cases placing large dimension rectangular Ni-Ti archwires with the intent of controlling torque to minimize the dumping of the incisors as teeth level and align. With the Damon System, the intent of the initial light round archwires is to apply just enough force to stimulate cellular activity without crushing the vascular supply in the periodontium. This has been defined as staying in the "optimal force zone" or biozone. If the appropriate force is applied, the muscles of the face and lips give a "lip bumper" effect on the incisors, minimizing anterior tipping.

The intent of the initial archwire is not to remove all of the rotations, but to align teeth and bracket slots just enough to move to the second phase of archwire progression. This is best accomplished by taking advantage of using a small dimension archwire in the large lumen of the bracket. An analogy of this phase of treatment is a car being driven on both sides of a curving highway to straighten out the bends in the road. This same principle of archwire and tube helps minimize the force and binding friction.

To summarize: The initial phase starts tooth movement, rotation control, leveling, aligning, arch form, and prepares for the second phase of archwire sequencing.

Archwire Objective
.014 Damon Copper Ni-Ti Start tooth movement, leveling, begin arch form development, prepare for next archwire.
.016 Ni-Ti SE Used occasionally as second archwire in severely crowded adult cases that are not quite ready for the second phase archwire.

Phase II: High-Technology Edgewise Wires

The second, or high-tech edgewise phase, is the "heart and soul" of the Damon System. This phase starts working on torque, root angulations and levels, completes rotation control, continues arch form development, consolidates space in the anterior segments, and prepares for the third phase of archwire sequencing. It is critically important to take a panorex and evaluate root and bracket position before proceeding to the major mechanics phase of treatment.

Archwire Objective
.014 x .025 Damon Copper Ni-Ti. The workhorse of the second phase. Placed in upper and lower well-prepared arches.
018 x .025 Damon Copper Ni-Ti Excellent wire to prepare for insertion of the working stainless steel transition wire.
017 x .025 Damon Ni-Ti Used with 20° of anterior torque and reverse curve; superb for division 2 second wire. If only intrusion needed, use the same size wire without the torque in the anterior.
.019 x .025 Damon Ni-Ti Used with 20° of anterior torque and reverse curve. Great follow-up wire on challenging division II cases. If only intrusion needed, use the same size wire without the torque in the anterior.

Phase III: Major Mechanics

The third, or major mechanics phase of archwire sequencing, is the working phase of treatment. This includes posterior space closure, anteroposterior dental correction and adjusting buccolingual discrepancies. Stainless steel archwires are primarily used to maintain vertical and buccolingual control during this major mechanical phase of treatment.

Archwire Objective
.019 x .025 SS Preposted Excellent archwire to maintain integrity of arch. Use during anteroposterior correction and closure. Great for maintaining the anterior vertical and posterior buccolingual.
.016 x .025 SS Preposted Used in lower arch when more play is desired. Nice finishing archwire in lower arch if all the torques are acceptable.

Phase IV: Finishing

The fourth phase is the finishing and detailing phase of archwire sequencing. If adjustments and torque requirements are minimal, the working archwire can be used to complete treatment. If moderate bends and torque are required, it is strongly recommended to use edgewise TMA. This gentle archwire makes finishing easy for both patient and clinician.

Archwire Objective
.019 x .025 SS Preposted Final detailing as necessary.