Doherty N M
University College, London Dental Hospital.
Int J Prosthodont. 1991 Jan-Feb;4(1):63-9.
The bond strength of resin-bonded restorations supporting extracoronal precision attachments retaining distal extension removable partial dentures was evaluated. Rigid bars of different lengths were attached to retainers with and without precision attachments. Retainers covering large areas of the teeth and having a generous "wraparound" design were used, but the teeth were not prepared to enhance resistance form. The retainers without attachments resisted forces as large as 200 N. When less circumferential tooth coverage was used, lower bond strength values were recorded. Four attachments of different loading designs were used. The precision attachments frequently became disengaged before the retainers debonded. Some low bond strengths indicated that there is a measure of unpredictability in the technique.
对支持冠外精密附着体固位远中游离端可摘局部义齿的树脂粘结修复体的粘结强度进行了评估。将不同长度的刚性杆连接到有或没有精密附着体的固位体上。使用覆盖牙齿大面积且具有宽大“环绕”设计的固位体，但未对牙齿进行预备以增强抗力形。没有附着体的固位体能够抵抗高达200 N的力。当使用较少的牙齿周向覆盖时，记录到较低的粘结强度值。使用了四种不同加载设计的附着体。精密附着体在固位体脱粘之前经常会脱开。一些较低的粘结强度表明该技术存在一定程度的不可预测性。
