Wheeler J J, Ackerman R J
Am J Orthod. 1983 Mar;83(3):181-6. doi: 10.1016/0002-9416(83)90081-7.
Bracket recycling has emerged concurrently with the practice of direct bonding. This study was undertaken to determine the effect of recycling on the retention of mesh-backed stainless steel brackets. Mesh strand diameter was measured on forty new brackets. These brackets were bonded to recently extracted human premolar teeth, and the tensile force required to fracture each bond was recorded. The brackets were then reconditioned by a thermal process. The mesh strand size was remeasured and the tensile test was repeated. It was found that (1) mesh strand diameter decreased 7 percent during the reconditioning process (93.89 microns +/- 3.17 S.D. compared to 87.07 microns +/- 4.76 S.D., z = 17.62, P less than 1 X 10(-5) ), (2) new bracket bonds were 6 percent stronger than recycled bracket bonds (43.88 pounds +/- 7.98 S.D. bond strength), and (3) reduction in mesh strand diameter during the reconditioning process did not correlate with changes in bond strength between initial and recycled bonding (Pearson r = 0.038).
托槽再利用与直接粘结技术同时出现。本研究旨在确定再利用对带网背的不锈钢托槽固位力的影响。测量了40个新托槽的网丝直径。将这些托槽粘结到最近拔除的人类前磨牙上，并记录使每个粘结断裂所需的拉力。然后通过热处理对托槽进行修复。重新测量网丝尺寸并重复拉伸试验。结果发现：（1）在修复过程中网丝直径减小了7%（从93.89微米±3.17标准差降至87.07微米±4.76标准差，z = 17.62，P小于1×10⁻⁵）；（2）新托槽粘结力比再利用托槽粘结力强6%（粘结强度为43.88磅±7.98标准差）；（3）修复过程中网丝直径的减小与初始粘结和再利用粘结之间粘结力的变化无关（皮尔逊相关系数r = 0.038）。
