Paszyna C, Mau J, Kerschbaum T
Dtsch Zahnarztl Z. 1989 May;44(5):328-31.
Statistical methods of survival-analysis were applied to investigate the effects of anatomical factors and clinical procedures which determine the "life-time" of 3-unit adhesive bridges. Their influences were analyzed until the first loss of retention after insertion. Besides the therapist effect, increased mobility and macromechanical preparation of the abutments could be identified as significant variables. Bridges bonded to one non-mobile and one hypermobile abutment tooth were found to be especially threatened. Extensive macromechanical preparation of the hard tissues reduces the hazard of debonding remarkably; this effect may be replaced by improved retentive mechanism of retainers.
应用生存分析的统计方法来研究解剖因素和临床操作对3单位粘结桥“使用寿命”的影响。分析这些因素的影响直至粘结桥插入后首次出现固位丧失。除了治疗师的影响外，基牙移动性增加和大量机械预备可被确定为显著变量。发现粘结于一个非移动基牙和一个过度移动基牙的粘结桥尤其容易出现问题。对硬组织进行广泛的机械预备可显著降低脱粘的风险；这种效果可能会被固位体改良的固位机制所取代。
