Langer A
J Prosthet Dent. 1981 Mar;45(3):253-8. doi: 10.1016/0022-3913(81)90385-1.
A comparison was made of the accuracy of maxillomandibular records made with trial bases fabricated on casts with blocked-out undercuts and those made with final processed bases. The results of the study indicate that significantly greater occlusal discrepancies occurred after the final processing when trial bases were used to obtain jaw records. With processed final bases, the denture superstructures are attached to the same bases used for recording, transferring, and adjusting the occlusion of the dentures. Thus, the dimensional changes of processing and the uneven setting of the bases upon the unevenly resilient mucosa are incorporated into both records and dentures. When placed in the mouth the conditions during and after fabrication are similar and occlusal discrepancies are minimal. With the trial base technique, the imperfections of both bases and clinical records are transferred to the final denture bases, which also have processing inaccuracies and which settle differently when placed upon the resilient tissue support. The divergent conditions created by the use of two types of bases are reflected in occlusal discrepancies of the completed dentures.
对使用带有填倒凹的模型制作的暂基托获取的颌记录与使用最终加工完成的基托获取的颌记录的准确性进行了比较。研究结果表明，当使用暂基托获取颌记录时，最终加工后出现的咬合差异明显更大。使用加工完成的最终基托时，义齿上部结构附着于用于记录、转移和调整义齿咬合的同一基托上。因此，加工过程中的尺寸变化以及基托在弹性不均匀的黏膜上的不均匀就位情况被纳入记录和义齿中。当义齿戴入口中时，制作过程中和制作后的情况相似，咬合差异最小。采用暂基托技术时，基托和临床记录的不完美之处都被转移到最终义齿基托上，最终义齿基托也存在加工误差，并且在置于弹性组织支持上时沉降情况不同。使用两种类型基托所产生的不同情况反映在完成义齿的咬合差异上。
