Kinami H, Sugimura M, Sakuda M, Okazaki M, Kimura H
Nara Medical University, Japan.
J Osaka Univ Dent Sch. 1990 Dec;30:106-14.
A new type of ceramic bracket was prepared to minimize the destruction at the bracket-resin interface and to suppress resin remaining on the tooth surface in debonding. The brackets were of a chemical bonding type, and had a box-formed cavity in the bracket base to hold resin, a 0.018 inch slot, and twin-type wings. Impact strengths and debonding aspects of the residual resin were studied. The impact strengths of the brackets seemed to exceed the desired level, compared to other control ceramic brackets or metal brackets. A resin remaining ratio (RRR) was adopted as the quantitative evaluation for the residual resin condition. Mean RRR's of the brackets were about 10%, which was a very low value in comparison to the other brackets.
制备了一种新型陶瓷托槽，以尽量减少托槽与树脂界面处的破坏，并在脱粘时抑制树脂残留在牙齿表面。这些托槽为化学键合型，在托槽基部有一个盒形腔以容纳树脂，有一个0.018英寸的槽和双型翼。研究了托槽的冲击强度和残留树脂的脱粘情况。与其他对照陶瓷托槽或金属托槽相比，这些托槽的冲击强度似乎超过了预期水平。采用树脂残留率（RRR）作为残留树脂状况的定量评估指标。这些托槽的平均RRR约为10%，与其他托槽相比是一个非常低的值。
