Miles Peter G, Weyant Robert J, Rustveld Luis
Caloundra, QLD 4551, Australia.
Angle Orthod. 2006 May;76(3):480-5. doi: 10.1043/0003-3219(2006)076[0480:ACTODV]2.0.CO;2.
The objective of this study was to compare the effectiveness and comfort of Damon 2 brackets and conventional twin brackets during initial alignment. Sixty consecutive patients participated in a split mouth design. One side of the lower arch was bonded with the Damon 2 bracket and the other with a conventional twin bracket. The sides were alternated with each consecutive patient. The irregularity index (II) was measured for each half of the arch at baseline, at 10 weeks at the first archwire change, and at another 10 weeks at the second archwire change. Any difference in discomfort was assessed within the first few days of archwire placement and again at the first archwire change. Comfort on the lips, preferred look, and bracket failure rates were also recorded. The twin bracket was more uncomfortable with the initial archwire (P = .04). However, at 10 weeks, substantially more patients reported discomfort with the Damon 2 bracket when engaging the archwire (P = .004). At both archwire changes at 10 and 20 weeks (P = .001), the conventional bracket had achieved a lower II than the Damon 2 bracket by 0.2 mm, which is not clinically significant. Patients preferred the look of the twin bracket over the Damon 2 (P < .0005) and more Damon 2 brackets debonded during the study (P < .0005). The Damon 2 bracket was no better during initial alignment than a conventional bracket. Initially, the Damon 2 bracket was less painful, but it was substantially more painful when placing the second archwire and had a higher bracket failure rate.
本研究的目的是比较Damon 2托槽与传统双翼托槽在初始排齐阶段的有效性和舒适度。60名连续患者参与了一项双侧对照设计。下牙弓的一侧粘结Damon 2托槽，另一侧粘结传统双翼托槽。每连续的患者两侧交替。在基线、第一次更换弓丝时的10周以及第二次更换弓丝时的另外10周，测量牙弓每半侧的不齐指数（II）。在弓丝放置的头几天内以及第一次更换弓丝时再次评估不适感的任何差异。还记录了唇部舒适度、美观度偏好以及托槽脱落率。在初始弓丝阶段，双翼托槽更不舒服（P = 0.04）。然而，在10周时，更多患者报告在结扎弓丝时Damon 2托槽更不舒服（P = 0.004）。在10周和20周的两次弓丝更换时（P = 0.001），传统托槽的II比Damon 2托槽低0.2 mm，这在临床上不具有显著意义。患者更喜欢双翼托槽的外观而非Damon 2托槽（P < 0.0005），并且在研究期间更多的Damon 2托槽脱粘（P < 0.0005）。在初始排齐阶段，Damon 2托槽并不比传统托槽更好。最初，Damon 2托槽疼痛较轻，但在放置第二根弓丝时疼痛明显更严重，并且托槽脱落率更高。
