Treatment with the SPEED System™ - Class I Non-Extraction 7 10 0 20 30 40 50 60 70 80 90 100 Mandibular Arch Maxillary Arch .014 SE .018 SS Class II elastic 1/4 2oz UR3 to LR6 & UL3 to LL6 .014 SE .018 SE .018 SS .018 x .025 Stainless Steel .014 SE .016 SE .018 SE .016 x .022 SE .018 x .025 SE .018 x .025 SS .018 x .025 SS .018 x .025 Super Elastic .016 x .022 SS .018 x .025 SS Bite Ramp Weeks 6W 6W 6W 19W 8W 7W 8W 6W 6W 6W 12W 7W 6W 8W 9W Maxillary Arch: Tooth movement was initiated with a light .014 Nickel Titanium archwire. At week 6, a .018 Stainless Steel wire was placed to continue levelling and an open coil spring was placed to create space for the upper canine. At week 12, a .018 x .025 Stainless Steel archwire was placed to establish anchorage and to act as support for an .014 nickel titanium sectional wire that was placed to engage the impacted canine. A SPEED bracket was bonded at the tip of the impacted canine (13) to begin the orthodontic traction. At week 18, bite ramps were removed and the .014 sectional wire was replaced with a .016 Nickel Titanium sectional wire. At week 30, the canine bracket was rebonded in the ideal position, and was engaged by a .018 Nickel Titanium archwire, which was placed 7-7 to complete alignment. Light Class II elastics were used to maintain the Class I molar relationship. At week 37, a .016 x .022 Nickel Titanium archwire was placed to establish archform, followed by .018 x .025 Nickel Titanium, combined with elastic chain 7-7 to close space, and to continue to correct the archform. At week 52, a .018 x .025 Stainless Steel wire was used to finish the case, finalize arch coordination and levelling, and establish proper occlusion. Mandibular Arch: Alignment and levelling of the lower arch was carried out over an 18-week period using .014 Nickel Titanium archwire, followed by a .018 Nickel Titanium archwire, and finally with a .018 Stainless Steel archwire. A .018 x .025 Nickel Titanium archwire was then placed to establish archform, initiate torque, and correct the curve of Spee. This was followed by a .018 x .025 Stainless Steel archwire. At week 45, a .016 x .022 Stainless Steel Wire was placed to address a bond failure and subsequent relapse of tooth number 37. This wire stayed in place for 7 weeks, at which point a .018 x .025 Stainless Steel archwire was placed to finish the case. As proper posterior occlusion had been achieved with good final torque positions, cuspid rise, and overbite / overjet, it was unnecessary to progress to a Stainless Steel wire larger than .018 x .025 to finish the case. Further, in the lower arch, I was concerned that advancing to a larger archwire may have excessively torqued the lower anteriors and compromised lip support. W = Weeks (eg. 29 W = 29 Weeks) Archwire Progression:
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